Form 10-Q - Quarterly report [Sections 13 or 15(d)]

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549


FORM 10-Q
(Mark One)
☑			QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

FOR THE QUARTERLY PERIOD ENDED March 30, 2024


OR
☐			TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
FOR THE TRANSITION PERIOD FROM TO

Commission File No. 001-15943

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

(Exact Name of Registrant as Specified in Its Charter)

Delaware

06-1397316

(State or Other Jurisdiction of
Incorporation or Organization)

(I.R.S. Employer
Identification No.)

251 Ballardvale Street

Wilmington, Massachusetts 01887

(Address of Principal Executive Offices) (Zip Code)

(Registrant’s telephone number, including area code): (781) 222-6000


Securities registered pursuant to Section 12(b) of the Act:
Title of each class	Ticker symbol(s)	Name of each exchange on which registered
Common stock, $0.01 par value	CRL	New York Stock Exchange

Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☑ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☑ No ☐

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.


Large accelerated filer	☑	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐

If an emerging growth company, indicate by a check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☑

As of April 27, 2024, there were 51,511,687 shares of the Registrant’s common stock outstanding.

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

QUARTERLY REPORT ON FORM 10-Q

FOR THE QUARTERLY PERIOD ENDED MARCH 30, 2024

TABLE OF CONTENTS


Item		Page
PART I - FINANCIAL INFORMATION
1	Financial Statements
	Condensed Consolidated Statements of Income (Unaudited) for the three months ended March 30, 2024 and April 1, 2023	3
	Condensed Consolidated Statements of Comprehensive Income (Unaudited) for the three months ended March 30, 2024 and April 1, 2023	4
	Condensed Consolidated Balance Sheets (Unaudited) as of March 30, 2024 and December 30, 2023	5
	Condensed Consolidated Statements of Cash Flows (Unaudited) for the three months ended March 30, 2024 and April 1, 2023	6
	Condensed Consolidated Statements of Changes in Equity and Redeemable Noncontrolling Interests (Unaudited) for the three months ended March 30, 2024 and April 1, 2023	7
	Notes to Unaudited Condensed Consolidated Financial Statements	8
2	Management’s Discussion and Analysis of Financial Condition and Results of Operations	24
	Overview	24
	Results of Operations	25
	Liquidity and Capital Resources	29
	Critical Accounting Policies and Estimates	31
	Recent Accounting Pronouncements	32
3	Quantitative and Qualitative Disclosure About Market Risk	32
4	Controls and Procedures	32
PART II - OTHER INFORMATION
1	Legal Proceedings	33
1A	Risk Factors	33
2	Unregistered Sales of Equity Securities and Use of Proceeds	34
5	Other Information	34
6	Exhibits	35

Signatures		36

Special Note on Factors Affecting Future Results

This Quarterly Report on Form 10-Q contains forward-looking statements regarding future events and the future results of Charles River Laboratories International, Inc. that are based on our current expectations, estimates, forecasts and projections about the industries in which we operate and the beliefs and assumptions of our management. Words such as “expect,” “anticipate,” “target,” “goal,” “project,” “intend,” “plan,” “believe,” “seek,” “estimate,” “will,” “likely,” “may,” “designed,” “would,” “future,” “can,” “could,” and other similar expressions which are predictions of, indicate future events and trends or which do not relate to historical matters, are intended to identify such forward-looking statements. These statements are based on our current expectations and beliefs and involve a number of risks, uncertainties and assumptions that are difficult to predict.

For example, we may use forward-looking statements when addressing topics such as: our expectations regarding the availability of non-human primates and our ability to diversify our non-human primate (NHP) supply chain; the outcome of (1) the U.S. government investigations and inquiries related to the NHP supply chain (including shipments of non-human primates from Cambodia received by the Company, (2) the putative securities class action lawsuit filed against us and certain current/former officers on May 19, 2023, and (3) the derivative lawsuit filed against members of the Board of Directors and certain current/former officers on November 8, 2023; the timing and impact of the development and implementation of enhanced procedures to reasonably ensure that non-human primates we source are purpose-bred; changes and uncertainties in the global economy and financial markets, including any changes in business, political, or economic conditions due to the November 16, 2022 announcement by the U.S. Department of Justice through the U.S. Attorney’s Office for the Southern District of Florida that a Cambodian non-human primate supplier and two Cambodian officials had been criminally charged in connection with illegally importing non-human primates into the United States; client demand, particularly future demand for drug discovery and development products and services, including the outsourcing of these services; our expectations with respect to our ability to meet financial targets; our expectations regarding stock repurchases, including the number of shares to be repurchased, expected timing and duration, the amount of capital that may be expended and the treatment of repurchased shares; our ability to successfully execute our business strategy; our ability to timely build infrastructure to satisfy capacity needs and support business growth, our ability to fund our operations for the foreseeable future, the impact of unauthorized access into our information systems, including the timing and effectiveness of any enhanced security and monitoring present spending trends and other cost reduction activities by our clients; future actions by our management; the outcome of contingencies; changes in our business strategy, business practices and methods of generating revenue; the development and performance of our services and products; market and industry conditions, including competitive and pricing trends and the impact of those conditions, including on our allowances for credit losses; our strategic relationships with leading pharmaceutical and biotechnology companies, venture capital investments, and opportunities for future similar arrangements; our cost structure; our expectations regarding our acquisitions and divestitures, including their impact and projected timing; our expectations with respect to revenue growth and operating synergies (including the impact of specific actions intended to cause related improvements, particularly with respect to our CDMO business); the impact of specific actions intended to improve overall operating efficiencies and profitability (and our ability to accommodate future demand with our infrastructure), including gains and losses attributable to businesses we plan to close, consolidate, divest or repurpose and the impact of operations and cost structure alignment efforts (including as estimated on an annualized basis); our expectations with respect to our study cancellation rates and the impact of such cancellations; changes in our expectations regarding future stock option, restricted stock, performance share units and other equity grants to employees and directors; expectations with respect to foreign currency exchange; assessing (or changing our assessment of) our tax positions for financial statement purposes; our liquidity; and the impact of litigation, including our ability to successfully defend litigation against us. In addition, these statements include the impact of economic and market conditions on us and our clients, the effects of our cost-saving actions and the steps to optimize returns to shareholders on an effective and timely basis; and our ability to withstand the current market conditions.

Forward-looking statements are predictions and are subject to risks, uncertainties and assumptions that are difficult to predict. Therefore, actual results may differ materially and adversely from those expressed in any forward-looking statements. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this document, or in the case of statements incorporated by reference, on the date of the document incorporated by reference. Factors that might cause or contribute to such differences include, but are not limited to, those discussed in our Annual Report on Form 10-K for the year ended December 30, 2023, under the sections entitled “Our Strategy,” “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” and in this Quarterly Report on Form 10-Q, under the sections entitled “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and “Risk Factors,” in our press releases, and other financial filings with the Securities and Exchange Commission. We have no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events, or risks. New information, future events, or risks may cause the forward-looking events we discuss in this report not to occur.

PART I. FINANCIAL INFORMATION

Item 1. Financial Statements

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED)

(in thousands, except per share amounts)


	Three Months Ended
		March 30, 2024		April 1, 2023
Service revenue		$	816,862	$	857,366
Product revenue		194,698		172,007
Total revenue		1,011,560		1,029,373
Costs and expenses:
Cost of services provided (excluding amortization of intangible assets)		578,164		565,477
Cost of products sold (excluding amortization of intangible assets)		88,553		86,242
Selling, general and administrative		186,291		174,846
Amortization of intangible assets		32,575		34,916
Operating income		125,977		167,892
Other income (expense):
Interest income		2,202		806
Interest expense		(35,001)		(34,380)
Other income (expense), net		5,833		(3,277)
Income before income taxes		99,011		131,041
Provision for income taxes		24,529		27,087
Net income		74,482		103,954
Less: Net income attributable to noncontrolling interests		1,522		823
Net income available to Charles River Laboratories International, Inc.		$	72,960	$	103,131

Calculation of net income per share attributable to common shareholders of Charles River Laboratories International, Inc.
Net income available to Charles River Laboratories International, Inc.		$	72,960	$	103,131
Less: Adjustment of redeemable noncontrolling interest		401		—
Less: Incremental dividends attributable to noncontrolling interest holders		5,230		—
Net income available to Charles River Laboratories International, Inc. common shareholders		$	67,329	$	103,131

Earnings per common share
Net income attributable to common shareholders:
Basic		$	1.31	$	2.02
Diluted		$	1.30	$	2.01

Weighted-average number of common shares outstanding:
Basic		51,437		51,097
Diluted		51,842		51,428

See Notes to Unaudited Condensed Consolidated Financial Statements.

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED)

(in thousands)


	Three Months Ended
		March 30, 2024		April 1, 2023
Net income		$	74,482	$	103,954
Other comprehensive income (loss):
Foreign currency translation adjustment		(62,840)		23,313
Amortization of net loss, settlement losses, and prior service benefit included in total cost for pension and other post-retirement benefit plans		344		170
Unrealized gains (losses) on hedging instruments		768		(1,402)
Other comprehensive income (loss), before income taxes		(61,728)		22,081
Less: Income tax benefit related to items of other comprehensive income		(5,473)		(1,038)
Comprehensive income, net of income taxes		18,227		127,073
Less: Comprehensive income (loss) related to noncontrolling interests, net of income taxes		(1,241)		1,009
Comprehensive income attributable to Charles River Laboratories International, Inc., net of income taxes		$	19,468	$	126,064







See Notes to Unaudited Condensed Consolidated Financial Statements.

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED)

(in thousands, except per share amounts)


	March 30, 2024		December 30, 2023
Assets
Current assets:
Cash and cash equivalents	$	327,039	$	276,771
Trade receivables and contract assets, net of allowances for credit losses of $25,407 and $25,722, respectively	786,980		780,375
Inventories	361,281		380,259
Prepaid assets	93,834		87,879
Other current assets	99,054		83,378
Total current assets	1,668,188		1,608,662
Property, plant and equipment, net	1,618,708		1,639,741
Venture capital and strategic equity investments	243,543		243,811
Operating lease right-of-use assets, net	384,394		394,029
Goodwill	3,070,241		3,095,045
Intangible assets, net	827,638		864,051
Deferred tax assets	36,924		40,279
Other assets	303,147		309,383
Total assets	$	8,152,783	$	8,195,001
Liabilities, Redeemable Noncontrolling Interests and Equity
Current liabilities:
Accounts payable	$	129,682	$	168,937
Accrued compensation	189,606		213,290
Deferred revenue	256,383		241,820
Accrued liabilities	190,892		227,825
Other current liabilities	188,247		203,210
Total current liabilities	954,810		1,055,082
Long-term debt, net and finance leases	2,660,459		2,647,147
Operating lease right-of-use liabilities	418,054		419,234
Deferred tax liabilities	180,094		191,349
Other long-term liabilities	235,441		223,191
Total liabilities	4,448,858		4,536,003
Commitments and contingencies (Notes 2, 11, 13, and 15)
Redeemable noncontrolling interest	57,775		56,722
Equity:
Preferred stock, $0.01 par value; 20,000 shares authorized; no shares issued and outstanding	—		—
Common stock, $0.01 par value; 120,000 shares authorized; 51,552 shares issued and 51,510 shares outstanding as of March 30, 2024, and 51,338 shares issued and outstanding as of December 30, 2023	515		513
Additional paid-in capital	1,939,413		1,905,578
Retained earnings	1,959,777		1,887,218
Treasury stock, at cost, 42 and zero shares, as of March 30, 2024 and December 30, 2023, respectively	(9,351)		—
Accumulated other comprehensive loss	(249,919)		(196,427)
Total Charles River Laboratories International, Inc. equity	3,640,435		3,596,882
Nonredeemable noncontrolling interests	5,715		5,394
Total equity	3,646,150		3,602,276
Total liabilities, noncontrolling interests and equity	$	8,152,783	$	8,195,001
See Notes to Unaudited Condensed Consolidated Financial Statements.

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)

(in thousands)


	Three Months Ended
	March 30, 2024		April 1, 2023
Cash flows relating to operating activities
Net income	$	74,482	$	103,954
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	85,357		77,069
Stock-based compensation	16,738		13,460
Deferred income taxes	(987)		(11,584)
Long-lived asset impairment charges	5,432		10,460
(Gain) loss on venture capital and strategic equity investments, net	(5,880)		3,282
Provision for credit losses	839		3,238


Other, net	1,999		1,448
Changes in assets and liabilities:
Trade receivables and contract assets, net	(17,281)		(33,831)
Inventories	5,600		(8,587)
Accounts payable	(8,541)		(41,313)
Accrued compensation	(20,945)		(21,469)
Deferred revenue	19,957		(481)
Customer contract deposits	6,140		1,509
Other assets and liabilities, net	(33,022)		12,228
Net cash provided by operating activities	129,888		109,383
Cash flows relating to investing activities
Acquisition of businesses and assets, net of cash acquired	—		(50,166)
Capital expenditures	(79,144)		(106,875)
Purchases of investments and contributions to venture capital investments	(13,867)		(12,570)
Proceeds from sale of investments	7,502		1,953

Other, net	(283)		(960)
Net cash used in investing activities	(85,792)		(168,618)
Cash flows relating to financing activities
Proceeds from long-term debt and revolving credit facility	300,882		192,500
Proceeds from exercises of stock options	21,505		11,792
Payments on long-term debt, revolving credit facility, and finance lease obligations	(292,482)		(157,328)
Purchase of treasury stock	(9,351)		(19,012)
Payments of contingent consideration	—		(2,711)

Other, net	(2,208)		—
Net cash provided by financing activities	18,346		25,241
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(8,387)		1,671
Net change in cash, cash equivalents, and restricted cash	54,055		(32,323)
Cash, cash equivalents, and restricted cash, beginning of period	284,480		241,214
Cash, cash equivalents, and restricted cash, end of period	$	338,535	$	208,891











See Notes to Unaudited Condensed Consolidated Financial Statements.

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY AND REDEEMABLE NONCONTROLLING INTERESTS (UNAUDITED)

(in thousands)


	Redeemable Noncontrolling Interests		Common Stock			Additional Paid-In Capital		Retained Earnings		Accumulated Other Comprehensive Income (Loss)		Treasury Stock			Total Charles River Laboratories, Inc. Equity		Noncontrolling Interest		Total Equity
			Shares	Amount								Shares	Amount
December 30, 2023	$	56,722	51,338	$	513	$	1,905,578	$	1,887,218	$	(196,427)	—	$	—	$	3,596,882	$	5,394	$	3,602,276
Net income	1,201		—	—		—		72,960		—		—	—		72,960		321		73,281
Other comprehensive (loss), net of tax	(2,763)		—	—		—		—		(53,492)		—	—		(53,492)		—		(53,492)
Adjustment of redeemable noncontrolling interests to redemption value	4,807		—	—		(4,406)		(401)		—		—	—		(4,807)		—		(4,807)
Dividends to noncontrolling interests	(2,192)		—	—		—		—		—		—	—		—		—		—
Issuance of stock under employee compensation plans	—		214	2		21,503		—		—		—	—		21,505		—		21,505
Purchase of treasury shares	—		—	—		—		—		—		42	(9,351)		(9,351)		—		(9,351)
Stock-based compensation	—		—	—		16,738		—		—		—	—		16,738		—		16,738
March 30, 2024	$	57,775	51,552	$	515	$	1,939,413	$	1,959,777	$	(249,919)	42	$	(9,351)	$	3,640,435	$	5,715	$	3,646,150

















	Redeemable Noncontrolling Interests		Common Stock			Additional Paid-In Capital		Retained Earnings		Accumulated Other Comprehensive Income (Loss)		Treasury Stock			Total Charles River Laboratories, Inc. Equity		Noncontrolling Interest		Total Equity
			Shares	Amount								Shares	Amount
December 31, 2022	$	42,427	50,944	$	509	$	1,804,940	$	1,432,901	$	(262,057)	—	$	—	$	2,976,293	$	4,785	$	2,981,078
Net income	322		—	—		—		103,131		—		—	—		103,131		501		103,632
Other comprehensive income, net of tax	186		—	—		—		—		22,933		—	—		22,933		—		22,933
Adjustment of redeemable noncontrolling interest to redemption value	—		—	—		—		—		—		—	—		—		—		—
Issuance of stock under employee compensation plans	—		316	3		11,789		—		—		—	—		11,792		—		11,792
Purchase of treasury shares	—		—	—		—		—		—		78	(19,012)		(19,012)		—		(19,012)
Stock-based compensation	—		—	—		13,460		—		—		—	—		13,460		—		13,460
April 1, 2023	$	42,935	51,260	$	512	$	1,830,189	$	1,536,032	$	(239,124)	78	$	(19,012)	$	3,108,597	$	5,286	$	3,113,883















See Notes to Unaudited Condensed Consolidated Financial Statements.

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

1. BASIS OF PRESENTATION

The accompanying condensed consolidated financial statements are unaudited and have been prepared by Charles River Laboratories International, Inc. (the Company) in accordance with accounting principles generally accepted in the United States (U.S. GAAP) and pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). The year-end condensed consolidated balance sheet data was derived from the Company’s audited consolidated financial statements, but does not include all disclosures required by U.S. GAAP. These unaudited condensed consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for fiscal year 2023. Certain reclassifications of prior year amounts have been made to conform to the current year presentation. The unaudited condensed consolidated financial statements, in the opinion of management, reflect all normal and recurring adjustments necessary for a fair statement of the Company’s financial position and results of operations.

Use of Estimates

The preparation of unaudited condensed consolidated financial statements in accordance with U.S. GAAP requires that the Company make estimates and judgments that may affect the reported amounts of assets, liabilities, revenues, expenses and related disclosure of contingent assets and liabilities. On an on-going basis, the Company evaluates its estimates, judgments, and methodologies. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Actual results may differ from these estimates under different assumptions or conditions. Changes in estimates are reflected in reported results in the period in which they become known.

Newly Issued Accounting Pronouncements

In November 2023, the FASB issued ASU 2023-07, “Improvements to Reportable Segment Disclosures (Topic 280)”. ASU 2023-07 modifies reportable segment disclosure requirements, primarily through enhanced disclosures about segment expenses categorized as significant or regularly provided to the Chief Operating Decision Maker (CODM). In addition, the amendments enhance interim disclosure requirements, clarify circumstances in which an entity can disclose multiple segment measures of profit or loss, and contain other disclosure requirements. The purpose of the amendments is to enable investors to better understand an entity’s overall performance and assess potential future cash flows. This ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted and the amendments in this update are required to be applied on a retrospective basis. The Company is currently evaluating the impact this new standard will have on the related disclosures in the annual consolidated financial statements, but does not believe there will be a material impact.

In December 2023, the FASB issued ASU 2023-09, “Improvements to Income Tax Disclosures (Topic 740)”. ASU 2023-09 requires enhanced disclosures on income taxes paid, adds disaggregation of continuing operations before income taxes between foreign and domestic earnings and defines specific categories for the reconciliation of jurisdictional tax rate to effective tax rate. This ASU is effective for fiscal years beginning after December 15, 2024, and can be applied on a prospective basis. The Company is currently evaluating the impact this new standard will have on the related disclosures on the consolidated financial statements.

Summary of Significant Accounting Policies

The Company’s significant accounting policies are described in Note 1, “Description of Business and Summary of Significant Accounting Policies” in the Company’s Annual Report on Form 10-K for fiscal year 2023.

Consolidation

The Company’s unaudited condensed consolidated financial statements reflect its financial statements and those of its subsidiaries in which the Company holds a controlling financial interest. For consolidated entities in which the Company owns or is exposed to less than 100% of the economics, the Company records net income (loss) attributable to noncontrolling interests in its unaudited condensed consolidated statements of income equal to the percentage of the economic or ownership interest retained in such entities by the respective noncontrolling parties. Redeemable noncontrolling interests, where the noncontrolling interest holders have the ability to require the Company to purchase the remaining interests, are classified in the mezzanine section of the unaudited condensed consolidated balance sheets, which is presented above the equity section and below liabilities. Intercompany balances and transactions are eliminated in consolidation.

The Company’s fiscal year is typically based on 52-weeks, with each quarter composed of 13 weeks ending on the last Saturday on, or closest to, March 31, June 30, September 30, and December 31. A 53rd week in the fourth quarter of the fiscal year is occasionally necessary to align with a December 31 calendar year-end.

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

Segment Reporting

The Company reports its results in three reportable segments: Research Models and Services (RMS), Discovery and Safety Assessment (DSA), and Manufacturing Solutions (Manufacturing).

The Company’s RMS reportable segment includes the Research Models, Research Model Services, and Cell Solutions businesses. Research Models includes the commercial production and sale of small research models, as well as the supply of large research models. Research Model Services includes: Insourcing Solutions (IS), which provides colony management of clients’ research operations (including recruitment, training, staffing, and management services) within the clients’ facilities and utilizing the Charles River Accelerator and Development Lab (CRADL™) offering, which provides vivarium space to clients, Genetically Engineered Models and Services (GEMS), which performs contract breeding and other services associated with genetically engineered models, and Research Animal Diagnostic Services (RADS), which provides health monitoring and diagnostics services related to research models; and Cell Solutions, which supplies controlled, consistent, customized primary cells and blood components derived from normal and mobilized peripheral blood and bone marrow.

The Company’s DSA reportable segment includes two businesses: Discovery Services and Safety Assessment. The Company provides regulated and non-regulated DSA services to support the research, development, and regulatory-required safety testing of potential new drugs, including therapeutic discovery and optimization plus in vitro and in vivo studies, laboratory support services, and strategic non-clinical consulting and program management to support product development.

The Company’s Manufacturing reportable segment includes Microbial Solutions, which provides in vitro (non-animal) lot-release testing products, microbial detection products, and species identification services and Biologics Solutions (Biologics), which performs specialized testing of biologics (Biologics Testing Solutions) as well as contract development and manufacturing products and services (CDMO).

2. ACQUISITIONS AND DIVESTITURES

Fiscal 2023 Acquisition

Noveprim Group

On November 30, 2023, the Company completed the acquisition of an additional 41% equity interest of Noveprim Group (Noveprim), a leading supplier of non-human primates (NHPs) located in Mauritius, resulting in a 90% controlling interest. The Company had previously acquired a 49% equity interest in 2022 for $90.0 million plus additional contingent payments up to $5.0 million based on future performance. The total consideration allocable to the Noveprim acquisition is $374.8 million, which includes $144.6 million additional cash paid for the 41% equity interest, elimination of historical activity and intercompany balances of $198.8 million which includes a remeasurement gain on the 49% equity investment of $103.2 million, contingent consideration of $33.3 million, deferred purchase price of $12.0 million payable from 2024 through 2027, offset by estimated post-closing adjustments for working capital of $13.8 million. The contingent consideration fair value is estimated using a Monte Carlo Simulation model and the maximum contingent contractual payments are up to $55.0 million based on future performance and milestone achievements in fiscal years 2023 through 2025. The Company has the call option right to purchase the remaining 10% equity interest up until one month after the sixth anniversary of closing the 41% equity interest. On the first anniversary of the expiration of the call option, a 12-month put option will be triggered giving the seller the right to require the Company to acquire the remaining shares of the seller. The redemption price for the call/put is fixed and ranges from $47.0 million to $54.0 million depending on when exercised. The noncontrolling interest is classified as a redeemable noncontrolling interest in the mezzanine section of the unaudited condensed consolidated balance sheet. The acquisition was funded through a combination of available cash and proceeds from the Company’s Credit Facility. This business is reported as part of the Company’s DSA reportable segment for NHPs vertically integrated into the DSA supply chain and the RMS reportable segment for those NHPs sold to third party customers. The Company incurred transaction and integration costs in connection with the acquisition of $0.2 million and $0.8 million for the three months ended March 30, 2024 and April 1, 2023, respectively, which was primarily included in Selling, general and administrative expenses within the unaudited condensed consolidated statements of income.

SAMDI Tech, Inc.

On January 27, 2023, the Company acquired SAMDI Tech, Inc., (SAMDI), a leading provider of high-quality, label-free high-throughput screening (HTS) solutions for drug discovery research. The acquisition of SAMDI will provide clients with seamless access to the premier, label-free HTS MS platform and create a comprehensive, library of drug discovery solutions. The purchase price of SAMDI was $62.8 million, net of $0.4 million in cash, inclusive of a 20% strategic equity interest previously owned by the Company of $12.6 million. The acquisition was funded through a combination of available cash and proceeds from the Company’s Credit Facility. This business is reported as part of the Company’s DSA reportable segment. The Company did not incur material transaction and integration costs in connection with the acquisition for the three months ended March 30, 2024 and April 1, 2023.

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

Purchase price information

The purchase price allocation was as follows:


	Noveprim Group(1)		SAMDI Tech, Inc.
	November 30, 2023		January 27, 2023
	(in thousands)
Trade receivables	$	1,308	$	513
Inventories	66,500		—
Other current assets (excluding cash)	3,467		75
Property, plant and equipment	35,831		593
Operating lease right-of-use asset, net	104		—
Goodwill (2)	172,846		37,129
Definite-lived intangible assets	9,500		33,070
Other long-term assets (3)	167,907		6
Deferred revenue	—		(43)
Other current liabilities	(16,378)		(351)
Operating lease right-of-use liabilities (Long-term)	(97)		—
Deferred tax liabilities	(12,984)		(8,191)
Other long-term liabilities	(7,796)		—
Redeemable noncontrolling interest (4)	(45,374)		—
Total purchase price allocation	$	374,834	$	62,801

(1) Purchase price allocation is preliminary and subject to change as additional information becomes available concerning the fair value and tax basis of the assets acquired and liabilities assumed, including certain contracts, obligations, and finalization of any working capital adjustments. Any additional adjustments to the purchase price allocation will be made as soon as practicable but no later than one year from the date of acquisition.
(2) The goodwill resulting from these transactions is primarily attributable to the potential growth of the Company’s segments from new customers introduced to the acquired businesses or synergies to be realized from acquiring an internal supplier servicing the DSA business and the assembled workforce of the acquirees, thus is not deductible for tax purposes.
(3) Other long-term assets acquired from the Noveprim acquisition include $167.8 million of biological assets, which will be amortized over an estimated eight-year useful life.
(4) Refer to Note 12. Equity and Noncontrolling Interests for further a description of the 10% noncontrolling interest fair value.

The definite-lived intangible assets acquired were as follows:


	Noveprim Group		SAMDI Tech, Inc.
Definite-Lived Intangible Assets	(in thousands)
Client relationships	$	—	$	23,400
Other intangible assets	9,500		9,670
Total definite-lived intangible assets	$	9,500	$	33,070

Weighted Average Amortization Life	(in years)
Client relationships	—		15
Other intangible assets	7		7
Total definite-lived intangible assets	7		12

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

3. REVENUE FROM CONTRACTS WITH CUSTOMERS

Disaggregation of Revenue

The following table disaggregates the Company’s revenue by major business line and timing of transfer of products or services:


	Three Months Ended
		March 30, 2024		April 1, 2023
		(in thousands)
Timing of Revenue Recognition:
RMS
Services and products transferred over time		$	97,049	$	93,639
Services and products transferred at a point in time		123,858		106,127
Total RMS revenue		220,907		199,766
DSA
Services and products transferred over time		604,125		661,836
Services and products transferred at a point in time		1,327		517
Total DSA revenue		605,452		662,353
Manufacturing
Services and products transferred over time		100,058		86,086
Services and products transferred at a point in time		85,143		81,168
Total Manufacturing revenue		185,201		167,254
Total revenue		$	1,011,560	$	1,029,373

Contract Balances from Contracts with Customers

The following table provides information about client receivables, contract assets, and contract liabilities from contracts with customers:


	March 30, 2024		December 30, 2023
	(in thousands)
Assets from contracts with customers
Client receivables	$	590,594	$	578,077
Unbilled revenue	221,793		228,020
Total	812,387		806,097
Less: Allowance for credit losses	(25,407)		(25,722)
Trade receivables and contract assets, net	$	786,980	$	780,375

Liabilities from contracts with customers
Current deferred revenue	$	256,383	$	241,820
Long-term deferred revenue (included in Other long-term liabilities)	32,448		30,919
Customer contract deposits (included in Other current liabilities)	90,589		85,554

Approximately 70% of unbilled revenue as of December 30, 2023, which was $228 million, was billed during the three months ended March 30, 2024. Approximately 70% of unbilled revenue as of December 31, 2022, which was $204 million, was billed during the three months ended April 1, 2023.

Approximately 60% of contract liabilities as of December 30, 2023, which was $273 million, were recognized as revenue during the three months ended March 30, 2024. Approximately 65% of contract liabilities as of December 31, 2022, which was $290 million, were recognized as revenue during the three months ended April 1, 2023.

When the Company does not have the unconditional right to advanced billings, both advanced client payments and unpaid advanced client billings are excluded from deferred revenue, with the advanced billings also being excluded from client receivables. The Company excluded approximately $52 million and $41 million of unpaid advanced client billings from both client receivables and deferred revenue in the accompanying unaudited condensed consolidated balance sheets as of March 30, 2024 and December 30, 2023, respectively.

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

Allowance for Credit Losses

The following is a summary of the activity of the Company’s allowance for credit losses:


	Three Months Ended
	March 30, 2024		April 1, 2023
	(in thousands)
Beginning balance	$	25,722	$	11,278
Additions	934		5,731
Deductions	(1,249)		(315)
Ending balance	$	25,407	$	16,694

Net provisions were $0.8 million and $3.2 million during the three months ended March 30, 2024 and April 1, 2023, respectively and include recoveries of balances previously written off, which are excluded from the table above.

Transaction Price Allocated to Future Performance Obligations

The Company discloses the aggregate amount of transaction price that is allocated to performance obligations that have not yet been satisfied as of March 30, 2024. Excluded from the disclosure is the value of unsatisfied performance obligations for contracts with an original expected length of one year or less, contracts for which revenue is recognized at the amount to which the Company has the right to invoice for services performed, and service revenue recognized in accordance with ASC 842, “Leases”. The aggregate amount of transaction price allocated to the remaining performance obligations for all open customer contracts as of March 30, 2024 was $920.5 million. The Company will recognize revenues for these performance obligations as they are satisfied, approximately 50% of which is expected to occur within the next twelve months and the remainder recognized thereafter during the remaining contract term.

Other Performance Obligations

As part of the Company’s service offerings, the Company has identified performance obligations related to leasing Company owned assets. In certain arrangements, customers obtain substantially all of the economic benefits of the identified assets, which may include manufacturing suites and related equipment, and have the right to direct the assets’ use over the term of the contract. The associated revenue is recognized on a straight-line basis over the term of the lease, which is generally less than one year.

Three Months Ended

March 30, 2024

April 1, 2023

(in thousands)

Affected Line Item in the Unaudited Condensed Consolidated Statements of Income

Lease revenue

20,974

24,090

Service revenue

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

4. SEGMENT AND GEOGRAPHIC INFORMATION

The Company operates in three reportable segments, RMS, DSA and Manufacturing. Asset information on a reportable segment basis is not disclosed as this information is not separately identified and internally reported to the Company’s Chief Operating Decision Maker (CODM). The following table presents the results of operations by reportable segment:


	Three Months Ended
		March 30, 2024		April 1, 2023
		(in thousands)
RMS
Revenue		$	220,907	$	199,766
Cost of revenue (excluding amortization of intangible assets)		140,925		126,804
Selling, general and administrative		30,893		27,058
Amortization of intangible assets		5,940		5,495
Operating income		$	43,149	$	40,409


DSA
Revenue		$	605,452	$	662,353
Cost of revenue (excluding amortization of intangible assets)		417,912		411,523
Selling, general and administrative		56,859		61,998
Amortization of intangible assets		15,842		17,401
Operating income		$	114,839	$	171,431


Manufacturing
Revenue		$	185,201	$	167,254
Cost of revenue (excluding amortization of intangible assets)		107,880		113,392
Selling, general and administrative		32,847		39,736
Amortization of intangible assets		10,793		12,020
Operating income		$	33,681	$	2,106


Unallocated Corporate
Selling, general and administrative		$	(65,692)	$	(46,054)
Operating income (1)		$	(65,692)	$	(46,054)

Consolidated
Revenue		$	1,011,560	$	1,029,373
Cost of revenue (excluding amortization of intangible assets)		666,717		651,719
Selling, general and administrative		186,291		174,846
Amortization of intangible assets		32,575		34,916
Operating income		$	125,977	$	167,892


(1) Operating income for unallocated corporate consists of costs associated with departments such as senior executives, corporate accounting, legal, tax, human resources, treasury, and investor relations.

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

Capital expenditures and depreciation and amortization (related to both intangible assets and certain assets acquired in business combinations) by reportable segment are as follows:


	RMS		DSA		Manufacturing		Unallocated Corporate		Consolidated
	(in thousands)




Capital Expenditures
Three Months Ended:
March 30, 2024	$	20,044	$	48,959	$	8,862	$	1,279	$	79,144
April 1, 2023	19,084		65,184		21,738		869		106,875

Depreciation and amortization
Three Months Ended:
March 30, 2024	$	18,123	$	45,789	$	19,805	$	1,640	$	85,357
April 1, 2023	13,489		42,450		20,084		1,046		77,069

Revenue by geographic area is as follows:


	U.S.		Europe		Canada		Asia Pacific		Other		Consolidated
	(in thousands)




Three Months Ended:
March 30, 2024	$	562,317	$	276,319	$	110,401	$	45,772	$	16,751	$	1,011,560
April 1, 2023	605,441		267,703		110,606		42,813		2,810		1,029,373

Included in the Other category above are operations located in Brazil, Israel, and Mauritius. Revenue represents sales originating in entities physically located in the identified geographic area.

Long-lived assets by geographic area are as follows:


	U.S.		Europe		Canada		Asia Pacific		Other		Consolidated
	(in thousands)
Long-lived assets
March 30, 2024	$	954,225	$	404,657	$	153,443	$	71,076	$	35,307	$	1,618,708
December 30, 2023	964,176		407,375		157,483		74,605		36,102		1,639,741

Long-lived assets consist of property, plant, and equipment, net.

5. SUPPLEMENTAL CASH FLOW INFORMATION


	Three Months Ended
	March 30, 2024		April 1, 2023
	(in thousands)
Cash paid for income taxes	$	18,728	$	13,618
Cash paid for interest	38,258		36,807
Non-cash investing activities:
Purchases of Property, plant and equipment included in Accounts payable and Accrued liabilities	$	23,911	$	43,116
Assets acquired under finance leases	3,159		—

Cash, cash equivalents and restricted cash is included in the accompanying unaudited balance sheet as follows:


	March 30, 2024		December 30, 2023
	(in thousands)
Supplemental cash flow information:
Cash and cash equivalents	$	327,039	$	276,771

Restricted cash included in Other current assets	10,327		5,803
Restricted cash included in Other assets	1,169		1,906
Cash, cash equivalents, and restricted cash, end of period	$	338,535	$	284,480

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

6. INVENTORY

Inventories

The composition of inventories is as follows:


	March 30, 2024		December 30, 2023
	(in thousands)
Raw materials and supplies	$	44,603	$	42,296
Work in process	43,252		59,727
Finished products	273,426		278,236
Inventories	$	361,281	$	380,259

7. PROPERTY, PLANT AND EQUIPMENT, NET

The composition of property, plant and equipment, net is as follows:


	March 30, 2024		December 30, 2023
	(in thousands)
Land	$	78,852	$	79,546
Buildings (1)	1,033,150		1,053,915
Machinery and equipment (1)	985,006		984,867
Leasehold improvements	348,558		366,556
Furniture and fixtures	30,712		31,284
Computer hardware and software (1)	254,018		254,413
Vehicles (1)	6,974		6,746
Construction in progress	245,826		197,723
Total	2,983,096		2,975,050
Less: Accumulated depreciation	(1,364,388)		(1,335,309)
Property, plant and equipment, net	$	1,618,708	$	1,639,741

(1) These balances include assets under finance leases.

Depreciation expense in the three months ended March 30, 2024 and April 1, 2023 was $45.7 million and $42.2 million, respectively.

8. VENTURE CAPITAL AND STRATEGIC EQUITY INVESTMENTS

Venture capital investments are summarized below:


	Three Months Ended
	March 30, 2024		April 1, 2023
	(in thousands)
Beginning balance	$	121,158	$	129,012
Capital contributions	3,829		3,214
Distributions	(9,353)		(7,217)
Gains (losses)	8,174		(6,848)
Foreign currency translation	(100)		260
Ending balance	$	123,708	$	118,421

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

The Company also invests, with minority positions, directly in equity of predominantly privately held companies. Strategic investments are summarized below:


	Three Months Ended
	March 30, 2024		April 1, 2023
	(in thousands)
Beginning balance	$	122,653	$	182,590
Purchase of investments	—		9,266
Distributions	—		(4,146)
Gain (loss)	(2,294)		3,566
Reduction for acquisition of entity (1)	—		(12,635)
Foreign currency translation	(524)		(3,275)
Ending balance	$	119,835	$	175,366

(1) Refer to Note 2. Acquisitions for further discussion on the SAMDI acquisition.

9. FAIR VALUE

Assets and liabilities measured at fair value on a recurring basis are summarized below:


	March 30, 2024
	Level 1		Level 2		Level 3		Total
Current assets measured at fair value:	(in thousands)
Cash equivalents	$	—	$	29	$	—	$	29
Term deposit	—		10,068		—		10,068
Other assets:
Life insurance policies	—		44,617		—		44,617
Interest rate swap	—		1,734		—		1,734
Total assets measured at fair value	$	—	$	56,448	$	—	$	56,448



Other long-term liabilities measured at fair value:
Contingent consideration	$	—	$	—	$	33,265	$	33,265

Total liabilities measured at fair value	$	—	$	—	$	33,265	$	33,265

The Company recognizes transfers between levels within the fair value hierarchy, if any, at the end of each quarter. During the three months ended March 30, 2024, there were no transfers between levels.


	December 30, 2023
	Level 1		Level 2		Level 3		Total
Current assets measured at fair value:	(in thousands)
Cash equivalents	$	—	$	29	$	—	$	29
Other assets:
Life insurance policies	—		40,912		—		40,912
Interest rate swap	—		966		—		966
Total assets measured at fair value	$	—	$	41,907	$	—	$	41,907

Other long-term liabilities measured at fair value
Contingent consideration	$	—	$	—	$	33,265	$	33,265

Total liabilities measured at fair value	$	—	$	—	$	33,265	$	33,265

During the year ended December 30, 2023, there were no transfers between levels.

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Contingent Consideration

The following table provides a rollforward of the contingent consideration related to the Company’s acquisitions.


	Three Months Ended
	March 30, 2024		April 1, 2023
	(in thousands)
Beginning balance	$	33,265	$	13,431

Payments	—		(2,711)
Total gains or losses (realized/unrealized):

Foreign currency translation	—		(177)
Ending balance	$	33,265	$	10,543

The Company estimates the fair value of contingent consideration obligations through valuation models, such as probability-weighted and option pricing models, which incorporate probability adjusted assumptions and simulations related to the achievement of the milestones and the likelihood of making related payments. The unobservable inputs used in the fair value measurements include the probabilities of successful achievement of certain financial targets, forecasted results or targets, volatility, and discount rates. The remaining maximum potential payments are approximately $55 million, of which the value accrued as of March 30, 2024 is $33 million as the probability of achieving the maximum target is estimated to be 60%. The volatility and weighted average cost of capital is approximately 7% and 9%, respectively. Increases or decreases in these assumptions may result in a higher or lower fair value measurement, respectively.

Cash Flow Hedge

The Company is exposed to market fluctuations in interest rates as well as variability in foreign exchange rates. The Company has an interest rate swap with a notional amount of $500 million maturing November 2, 2024 to manage interest rate fluctuation related to floating rate borrowings under the Credit Facility, at a fixed rate of 4.65%.

Debt Instruments

The book value of the Company’s revolving loans, which are variable rate loans carried at amortized cost, approximates the fair value based on current market pricing of similar debt. As the fair value is based on significant other observable inputs, including current interest and foreign currency exchange rates, it is deemed to be Level 2 within the fair value hierarchy.

The book value of the Company’s Senior Notes are fixed rate obligations carried at amortized cost. Fair value is based on quoted market prices as well as borrowing rates available to the Company. As the fair value is based on significant other observable outputs, it is deemed to be Level 2 within the fair value hierarchy. The book value and fair value of the Company’s Senior Notes is summarized below:


	March 30, 2024				December 30, 2023
	Book Value		Fair Value		Book Value		Fair Value
	(in thousands)
4.25% Senior Notes due 2028	$	500,000	$	468,750	$	500,000	$	478,100
3.75% Senior Notes due 2029	500,000		453,750		500,000		458,100
4.00% Senior Notes due 2031	500,000		445,000		500,000		449,350

10. GOODWILL AND INTANGIBLE ASSETS

Goodwill

The following table provides a rollforward of the Company’s goodwill:


	RMS		DSA (1)		Manufacturing		Total
	(in thousands)
December 30, 2023	$	497,474	$	1,662,434	$	935,137	$	3,095,045
Acquisitions	—		497		—		497

Foreign exchange	(407)		(21,340)		(3,554)		(25,301)
March 30, 2024	$	497,067	$	1,641,591	$	931,583	$	3,070,241
(1) DSA includes accumulated impairment losses of $1 billion, which were recognized in fiscal years 2008 and 2010.

The decrease in goodwill during the three months ended March 30, 2024 related to foreign exchange in the DSA and Manufacturing reportable segments.

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Intangible Assets, Net

The following table displays intangible assets, net by major class:


	March 30, 2024						December 30, 2023
	Gross		Accumulated Amortization		Net		Gross		Accumulated Amortization		Net
	(in thousands)
Client relationships	$	1,515,021	$	(739,260)	$	775,761	$	1,528,780	$	(721,322)	$	807,458
Technology	140,982		(112,842)		28,140		142,190		(111,764)		30,426
Trademarks and trade names	11,842		(4,822)		7,020		11,878		(4,568)		7,310
Backlog	3,100		(2,485)		615		3,100		(2,177)		923
Other	43,008		(26,906)		16,102		43,611		(25,677)		17,934
Intangible assets	$	1,713,953	$	(886,315)	$	827,638	$	1,729,559	$	(865,508)	$	864,051

The decrease in intangible assets, net during the three months ended March 30, 2024 related to normal amortization over the useful lives.

Amortization expense of definite-lived intangible assets for three months ended March 30, 2024 and April 1, 2023 was $32.6 million and $34.9 million, respectively.

11. DEBT AND OTHER FINANCING ARRANGEMENTS

Long-term debt, net and finance leases consists of the following:


	March 30, 2024		December 30, 2023
	(in thousands)
Revolving facility	$	1,133,000	$	1,129,243
4.25% Senior Notes due 2028	500,000		500,000
3.75% Senior Notes due 2029	500,000		500,000
4.00% Senior Notes due 2031	500,000		500,000
Other debt	13,516		9,575
Finance leases	30,230		28,550
Total debt and finance leases	2,676,746		2,667,368
Less:
Current portion of long-term debt	459		3,172
Current portion of finance leases	2,169		2,398
Current portion of long-term debt and finance leases	2,628		5,570
Long-term debt and finance leases	2,674,118		2,661,798
Debt discount and debt issuance costs	(13,659)		(14,651)
Long-term debt, net and finance leases	$	2,660,459	$	2,647,147

As of March 30, 2024 and December 30, 2023, the weighted average interest rate on the Company’s debt was 4.97% and 4.93%, respectively.

Letters of Credit

As of March 30, 2024 and December 30, 2023, the Company had $21.2 million and $21.6 million, respectively, in outstanding letters of credit.

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

12. EQUITY AND NONCONTROLLING INTERESTS

Earnings Per Share

The following table reconciles the numerator and denominator in the computations of basic and diluted earnings per share:


	Three Months Ended
		March 30, 2024		April 1, 2023
		(in thousands)
Numerator:
Net income		$	74,482	$	103,954
Less: Net income attributable to noncontrolling interests		1,522		823
Net income available to Charles River Laboratories International, Inc.		72,960		103,131
Less: Adjustment of redeemable noncontrolling interest (1)		401		—
Less: Incremental dividends attributable to noncontrolling interest holders (2)		5,230		—
Net income available to Charles River Laboratories International, Inc. common shareholders		$	67,329	$	103,131

Denominator:
Weighted-average shares outstanding - Basic		51,437		51,097
Effect of dilutive securities:
Stock options, restricted stock units and performance share units		405		331
Weighted-average shares outstanding - Diluted		51,842		51,428

Anti-dilutive common stock equivalents (3)		448		405

(1) Represents adjustments of redeemable noncontrolling interest that impact retained earnings.
(2) Represents incremental undeclared dividends attributable to Noveprim noncontrolling interest holders who are entitled to preferential dividends for fiscal year 2024.
(3) These common stock equivalents were outstanding for the periods presented, but were not included in the computation of diluted EPS for those periods because their inclusion would have had an anti-dilutive effect.

Treasury Shares

The Company’s Board of Directors has authorized a $1.3 billion stock repurchase program. As of March 30, 2024, the Company had $129.1 million remaining on the authorized stock repurchase program.

The Company’s stock-based compensation plans permit the netting of common stock upon vesting of RSUs and PSUs in order to satisfy individual statutory tax withholding requirements. The Company acquired shares of approximately 0.1 million in the three months ended March 30, 2024 and three months ended April 1, 2023, for $9.4 million and $19.0 million, respectively, from such netting.

Accumulated Other Comprehensive Income (Loss)

Changes to each component of accumulated other comprehensive income (loss), net of income taxes, are as follows:


	Foreign Currency Translation Adjustment and Other		Pension and Other Post-Retirement Benefit Plans		Net Unrealized (Loss) Gain on Cash Flow Hedge		Total
	(in thousands)
December 30, 2023	$	(149,999)	$	(47,167)	$	739	$	(196,427)
Other comprehensive income (loss) before reclassifications	(60,077)		344		768		(58,965)

Net current period other comprehensive income (loss)	(60,077)		344		768		(58,965)
Income tax expense (benefit)	(5,737)		80		184		(5,473)
March 30, 2024	$	(204,339)	$	(46,903)	$	1,323	$	(249,919)

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Redeemable Noncontrolling Interests

Through March 30, 2024, the Company holds several redeemable noncontrolling interests. Since the Company has the right to purchase, and the noncontrolling interest holders have the right to require the Company to purchase the remaining interest, which represents a derivative embedded within the equity instrument, the noncontrolling interest is classified in the mezzanine section of the unaudited condensed consolidated balance sheets, which is presented above the equity section and below liabilities.

The redeemable noncontrolling interests are measured at the greater of (i) the redemption amount or (ii) the historical value resulting from the original acquisition date fair value, increased or decreased for the noncontrolling interest’s share of net income (loss), equity capital contributions and distributions. The fair value of the redeemable noncontrolling interest is determined using the income approach, with key assumptions being projected cash flows and discount rates based on market participant’s weighted average cost of capital. To the extent redemption value exceeds carrying value, adjustments are recorded to additional paid-in capital, with any cumulative excess of redemption value over fair value recorded in retained earnings, which impacts net income available to common shareholders used in the calculation of earnings per common share.

Noveprim

The Company holds a 90% ownership interest in Noveprim. The Company has the right to purchase, and the noncontrolling interest holders have the right to sell, the remaining 10% equity interest at a fixed redemption value that ranges from $47.0 million to $54.0 million depending on when exercised. The Company has the call option right to purchase the remaining 10% equity up until one month after the sixth anniversary of closing the 41% equity stake (December 2029). On the first anniversary of the expiration of the call option (December 2030), a 12-month put option will be triggered giving the seller the right to require the Company to acquire the remaining shares of the seller for $54.0 million. Additionally, the 10% noncontrolling interest holders may receive a dividend disproportionate to their equity ownership, of which the fair value of $8 million as of the acquisition date was recorded within the redeemable noncontrolling interest. Through March 30, 2024, incremental dividends based on Noveprim statutory net income attributed to the redeemable noncontrolling interest holders of $5.2 million reduced net income available to common shareholders used in the calculation of earnings per common share. The redemption value is accreted to the put purchase price of $54.0 million using the interest method through December 2030. As of March 30, 2024, the redemption value of $45.8 million exceeded both the carrying value and fair value, resulting in both an adjustment to additional paid in capital of $1.7 million and an adjustment to retained earnings of $0.4 million, respectively.

Other redeemable noncontrolling interest

In 2019, the Company acquired an 80% equity interest in a subsidiary, which included a 20% redeemable noncontrolling interest. In June 2022, the Company purchased an additional 10% interest in the subsidiary for $15.0 million, resulting in a remaining noncontrolling interest of 10%. Beginning in 2024, the Company has the right to purchase, and the noncontrolling interest holders have the right to sell, the remaining 10% equity interest at its appraised value. The redemption value is measured at the greater of the appraised value or a predetermined floor. The amount that the Company could be required to pay to purchase the remaining 10% equity interest is not limited. As of March 30, 2024, the redemption value of $12.0 million exceeded the carrying value, resulting in an adjustment to additional paid in capital of $2.8 million. During the second quarter of fiscal 2024, the Company acquired the remaining 10% for $12.0 million.

Vital River

The Company held a 92% ownership interest in Vital River, a commercial provider of research models and related services in China as of December 31, 2022. The Company had the right to purchase, and the noncontrolling interest holders had the right to sell, the remaining 8% equity interest at a contractually defined redemption value, subject to a redemption floor. The amount that the Company could be required to pay to purchase the remaining 8% equity interest was not limited. During the fourth quarter of fiscal 2023, the Company acquired the remaining 8% and paid $4.8 million of the total $24.4 million due. The remaining purchase price payable was included in Accrued liabilities within the Company’s unaudited condensed consolidated balance sheet as of March 30, 2024 and December 30, 2023 and is expected to be paid during fiscal year 2024.

Nonredeemable Noncontrolling Interest

The Company has an investment in an entity whose financial results are consolidated in the Company’s unaudited condensed consolidated financial statements, as it has the ability to exercise control over this entity. The interest of the noncontrolling party in this entity has been recorded as nonredeemable noncontrolling interest within Equity in the accompanying unaudited condensed consolidated balance sheets. The activity within the nonredeemable noncontrolling interest was not significant during the three months ended March 30, 2024 and April 1, 2023.

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

13. INCOME TAXES

The Company’s effective tax rates for the three months ended March 30, 2024 and April 1, 2023 were 24.8% and 20.7%, respectively. The increase in the effective tax rate from the corresponding prior year period was primarily attributable to unfavorable tax effects from stock-based compensation deductions in the three months ended March 30, 2024.

For the three months ended March 30, 2024, the Company’s unrecognized tax benefits increased by $0.7 million to $23.4 million, primarily due to increases in research and development tax credit reserves. For the three months ended March 30, 2024, the amount of unrecognized income tax benefits that would impact the effective tax rate increased by $0.4 million to $20.7 million for the same reasons discussed above. The accrued interest on unrecognized tax benefits was $1.4 million as of March 30, 2024. The Company estimates that it is reasonably possible that the unrecognized tax benefits will decrease by approximately $5 million over the next twelve-month period, primarily due to audit settlements and expiring statutes of limitations.

The Company’s prepaid and accrued tax positions are as follows:


	March 30, 2024		December 30, 2023		Affected Line Item in the Unaudited Condensed Consolidated Balance Sheets
	(in thousands)
Prepaid income tax	$	60,311	$	59,715	Other current assets
Accrued income taxes	34,102		38,819		Other current liabilities

The Company conducts business in a number of tax jurisdictions. As a result, it is subject to tax audits on a regular basis including, but not limited to, such major jurisdictions as the U.S., the U.K., China, France, Germany, and Canada. With few exceptions, the Company is no longer subject to U.S. and international income tax examinations for years before 2020.

The Company and certain of its subsidiaries have ongoing tax controversies in the U.S., Canada, and India. The Company does not anticipate resolution of these audits will have a material impact on its unaudited condensed consolidated financial statements.

14. RESTRUCTURING AND ASSET IMPAIRMENTS

The Company has undertaken restructuring actions impacting the reportable segments at various locations across North America, Europe and Asia. This includes workforce right-sizing actions resulting in severance and transition costs; and costs related to the consolidation of facilities resulting in asset impairment and accelerated depreciation charges.

The following table presents restructuring costs by reportable segment:


	Three Months Ended
		March 30, 2024		April 1, 2023
		(in thousands)
RMS		$	7,387	$	—
DSA		6,491		(2)
Manufacturing		1,631		3,488
Unallocated corporate		1,490		—
Total		$	16,999	$	3,486

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The following table presents restructuring costs as included within the Company’s unaudited condensed consolidated statements of income:


	March 30, 2024						April 1, 2023
	Severance and Transition Costs		Asset Impairments and Other Costs		Total		Severance and Transition Costs		Asset Impairments and Other Costs		Total
	(in thousands)






Three Months Ended
Cost of services provided (excluding amortization of intangible assets)	$	4,810	$	1,108	$	5,918	$	567	$	—	$	567
Cost of products sold (excluding amortization of intangible assets)	678		1,330		2,008		18		2,564		2,582
Selling, general and administrative	3,549		5,524		9,073		329		8		337
Total restructuring costs	$	9,037	$	7,962	$	16,999	$	914	$	2,572	$	3,486

Rollforward of Restructuring Activities

The following table provides a rollforward for all of the Company’s severance and transition costs related to all restructuring activities:


	Three Months Ended
	March 30, 2024		April 1, 2023
	(in thousands)
Beginning balance	$	5,050	$	1,300
Expense (excluding non-cash charges)	9,037		914
Payments / utilization	(3,235)		(331)

Foreign currency adjustments	(40)		6
Ending balance	$	10,812	$	1,889

As of March 30, 2024 and December 30, 2023, $10.8 million and $5.1 million, respectively, of severance and other personnel related costs liabilities were included in accrued compensation and accrued liabilities within the Company’s unaudited condensed consolidated balance sheets.

15. COMMITMENTS AND CONTINGENCIES

Litigation

On February 16, 2023, the Company was informed by the U.S. Department of Justice (DOJ) that in conjunction with the U.S. Fish and Wildlife Service (USFWS), it had commenced an investigation into the Company’s conduct regarding several shipments of non-human primates from Cambodia. On February 17, 2023 the Company received a grand jury subpoena requesting certain documents related to such investigation. The Company is aware of a parallel civil investigation being undertaken by the DOJ and USFWS. The Company is cooperating with the DOJ and the USFWS and believes that the concerns raised with respect to the Company’s conduct are without merit. The Company maintains a global supplier onboarding and oversight program incorporating risk-based due diligence, auditing, and monitoring practices to help ensure the quality of our supplier relationships and compliance with applicable U.S. and international laws and regulations, and has operated under the belief that all shipments of non-human primates it received satisfied the material requirements, documentation and related processes and procedures of the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) documentation and related processes and procedures, which guides the release of each import by USFWS. Notwithstanding our efforts and good-faith belief, in connection with the civil investigation, the Company has voluntarily suspended future shipments of non-human primates from Cambodia to the United States until such time that the Company and USFWS can agree upon and implement additional procedures to reasonably ensure that non-human primates imported from Cambodia are purpose-bred. The Company continues to care for the Cambodia-sourced non-human primates from certain shipments in the United States. The carrying value of the inventory related to these shipments was approximately $27 million as of March 30, 2024, which reflects the value of the shipments in accordance with the Company’s inventory accounting policy. On May 16, 2023, the Company received an inquiry from the Enforcement Division of the U.S. Securities and Exchange Commission (SEC) requesting it to voluntarily provide information, subsequently augmented with a document subpoena, primarily related to the sourcing of non-human primates, and the Company is cooperating with the request. The Company is not able to predict what action, if any, might be taken in the future by the DOJ, USFWS, SEC or other governmental authorities as a result of the investigations. None of the DOJ, USFWS or SEC has provided the Company with any specific timeline or indication as to when these investigations or, specific to the DOJ and USFWS, discussions regarding future processes and procedures, will be

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

concluded or resolved. The Company cannot predict the timing, outcome or possible impact of the investigations, including without limitation any potential fines, penalties or liabilities.

A putative securities class action (Securities Class Action) was filed on May 19, 2023 against the Company and a number of its current/former officers in the United States District Court for the District of Massachusetts. On August 31, 2023, the court appointed the State Teachers Retirement System of Ohio as lead plaintiff. An amended complaint was filed on November 14, 2023 that, among other things, included only James Foster, the Chief Executive Officer and David R. Smith, the former Chief Financial Officer as defendants along with the Company. The amended complaint asserts claims under §§ 10(b) and 20(a) of the Securities Exchange Act of 1934 (the "Exchange Act") on behalf of a putative class of purchasers of Company securities from May 5, 2020 through February 21, 2023, alleging that certain of the Company’s disclosures about its practices with respect to the importation of non-human primates made during the putative class period were materially false or misleading. The Company filed a motion to dismiss. While the Company cannot predict the outcome of this matter, it believes the class action to be without merit and plans to vigorously defend against it. The Company cannot reasonably estimate the maximum potential exposure or the range of possible loss in association with this matter.

On November 8, 2023, a stockholder filed a derivative lawsuit in the U.S. District Court of the District of Delaware asserting claims on the Company’s behalf against the members of the Company’s Board of Directors and certain of the Company’s current/former officers (James Foster, the Chief Executive Officer; David R. Smith, the former Chief Financial Officer; and Flavia Pease, the current Chief Financial Officer). The complaint alleges that the defendants breached their fiduciary duties to the Company and its stockholders because certain of the Company’s disclosures about its practices with respect to the importation of non-human primates were materially false or misleading. The complaint also alleges that the defendants breached their fiduciary duties by causing the Company to fail to maintain adequate internal controls over securities disclosure and compliance with applicable law and by failing to comply with the company’s Code of Business Conduct and Ethics. In March 2024, the plaintiff agreed to stay the action until the United States District Court for the District of Massachusetts rules on the pending motion to dismiss in the Securities Class Action. The Company intends to file a motion to dismiss at that time. While the Company cannot predict the outcome of this matter, it believes the derivative lawsuit to be without merit and plans to vigorously defend against it. The Company cannot reasonably estimate the maximum potential exposure or the range of possible loss in association with this matter.

Aside from the matters above, the Company believes there are no other matters pending against the Company that could have a material impact on the Company’s business, financial condition, or results of operations.

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion should be read in conjunction with our unaudited condensed consolidated financial statements and related notes of this Quarterly Report on Form 10-Q and our audited consolidated financial statements and related notes included in our Annual Report on Form 10-K for fiscal year 2023. The following discussion contains forward-looking statements. Actual results may differ significantly from those projected in the forward-looking statements. Factors that might cause future results to differ materially from those projected in the forward-looking statements include, but are not limited to, those discussed in Item 1A, “Risk Factors” included elsewhere within this Form 10-Q. Certain percentage changes may not recalculate due to rounding.

Overview

We are a leading, non-clinical global drug development partner with a mission to create healthier lives. For over 75 years, we have been in the business of providing the research models required in the research and development of new drugs, devices, and therapies. Over this time, we have built upon our original core competency of laboratory animal medicine and science (research model technologies) to develop a diverse portfolio of discovery and safety assessment services, both Good Laboratory Practice (GLP) and non-GLP, that supports our clients from target identification through non-clinical development. We also provide a suite of products and services to support our clients’ manufacturing activities. Utilizing our broad portfolio of products and services enables our clients to create a more efficient and flexible drug development model, which reduces their costs, enhances their productivity and effectiveness, and increases speed to market.

Our client base includes major global pharmaceutical companies, many biotechnology companies; agricultural and industrial chemical, life science, veterinary medicine, medical device, diagnostic and consumer product companies; contract research and contract manufacturing organizations; and other commercial entities, as well as leading hospitals, academic institutions, and government agencies around the world.

Segment Reporting

Our three reportable segments are Research Models and Services (RMS), Discovery and Safety Assessment (DSA), and Manufacturing Solutions (Manufacturing).

Our RMS reportable segment includes the Research Models, Research Model Services, and Cell Solutions businesses. Research Models includes the commercial production and sale of small research models, as well as the supply of large research models. Research Model Services includes: Insourcing Solutions (IS), which provides colony management of our clients’ research operations (including recruitment, training, staffing, and management services) within our clients’ facilities as well as our own vivarium space, utilizing our Charles River Accelerator and Development Lab (CRADL), Genetically Engineered Models and Services (GEMS), which performs contract breeding and other services associated with genetically engineered models; and Research Animal Diagnostic Services (RADS), which provides health monitoring and diagnostics services related to research models; and Cell Solutions provides controlled, consistent, customized primary cells and blood components derived from normal and mobilized peripheral blood and bone marrow.

Our DSA segment is comprised of two businesses: Discovery Services and Safety Assessment. We provide regulated and non-regulated DSA services to support the research, development, and regulatory-required safety testing of potential new drugs, including therapeutic discovery and optimization plus in vitro (non-animal) and in vivo (in research models) studies, laboratory support services, and strategic non-clinical consulting and program management to support product development.

Our Manufacturing reportable segment includes Microbial Solutions, which provides in vitro lot-release testing products, microbial detection products, and species identification services and Biologics Solutions (Biologics), which performs specialized testing of biologics (Biologics Testing Solutions) as well as contract development and manufacturing products and services (CDMO).

U.S. Government Investigations into the Non-Human Primate Supply Chain

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

efforts and good-faith belief, in connection with the civil investigation, the Company has voluntarily suspended future shipments of non-human primates from Cambodia to the United States until such time that the Company and USFWS can agree upon and implement additional procedures to reasonably ensure that non-human primates imported from Cambodia are purpose-bred. The Company continues to care for the Cambodia-sourced non-human primates from certain shipments in the United States. The carrying value of the inventory related to these shipments is approximately $27 million as of March 30, 2024, which reflects the value of the shipments in accordance with our inventory accounting policy. On May 16, 2023, the Company received an inquiry from the Enforcement Division of the U.S. Securities and Exchange Commission (SEC) requesting it to voluntarily provide information, subsequently augmented with a document subpoena, primarily related to the sourcing of non-human primates, and the Company is cooperating with the request. We are not able to predict what action, if any, might be taken in the future by the DOJ, USFWS, SEC or other governmental authorities as a result of the investigations. None of the DOJ, USFWS or SEC has provided the Company with any specific timeline or indication as to when these investigations or, specific to the DOJ and USFWS, discussions regarding future processes and procedures, will be concluded or resolved. The Company cannot predict the timing, outcome or possible impact of the investigations, including without limitation any potential fines, penalties or liabilities. For our assessment of risk factors surrounding the aforementioned matter refer to Item 1A, “Risk Factors” and Item 3, “Legal Proceedings” of our Annual Report on Form 10-K for fiscal year 2023.

Recent Acquisitions

Our strategy is to augment internal growth of existing businesses with complementary acquisitions. Our recent acquisitions are described below.

Fiscal Year 2023 Acquisitions

On November 30, 2023, we completed our acquisition of an additional 41% equity interest of Noveprim Group (“Noveprim”), a leading provider of non-human primates (“NHPs”) used for biomedical, pharmaceutical and toxicological research purposes, resulting in a 90% controlling interest. The acquisition strengthens and diversifies the supply chain for our DSA segment. We had previously acquired a 49% equity stake in 2022 for $90.0 million up-front and additional future contingent payments up to $5.0 million based on future performance. The total preliminary purchase price for the Noveprim acquisition is $374.8 million, which includes $144.6 million additional cash paid for the 41% equity interest, elimination of historical activity and intercompany balances of $198.8 million which includes a remeasurement gain on the 49% equity investment of $103.2 million, contingent consideration of $33.3 million, deferred purchase price of $12.0 million payable from 2024 through 2027, offset by estimated post-closing adjustments for working capital of $13.8 million. The acquisition was funded through a combination of available cash and proceeds from our Credit Facility. This business is reported as part of our DSA reportable segment for NHPs vertically integrated into our Safety Assessment supply chain and the RMS reportable segment for NHPs sold to third party customers.

On January 27, 2023, we acquired SAMDI Tech, Inc., (SAMDI), a leading provider of high-quality, label-free high-throughput screening (HTS) solutions for drug discovery research. The acquisition of SAMDI will provide clients with seamless access to the premier, label-free HTS MS platform and create a comprehensive, library of drug discovery solutions. The purchase price of SAMDI was $62.8 million, inclusive of a 20% strategic equity interest previously owned by us. The acquisition was funded through a combination of available cash and proceeds from our Credit Facility. This business is reported as part of our DSA reportable segment.

Fiscal Quarters

Our fiscal year is typically based on 52-weeks, with each quarter composed of 13 weeks ending on the last Saturday on, or closest to, March 31, June 30, September 30, and December 31. A 53rd week in the fourth quarter of the fiscal year is occasionally necessary to align with a December 31 calendar year-end.

Results of Operations

Consolidated Results of Operations and Liquidity

Revenue for the three months ended March 30, 2024 decreased $17.8 million, or 1.7%, to $1,011.6 million compared to $1,029.4 million in the corresponding period in 2023. The decrease in revenue was primarily due to our DSA business which experienced lower volume; partially offset by higher revenue within our RMS business, principally driven by the recent acquisition of Noveprim which sells large research models to third parties; higher revenue within our Manufacturing businesses, and the effect of changes in foreign currency exchange rates when compared to the corresponding three month period in 2023.

In the three months ended March 30, 2024, our operating income and operating income margin were $126.0 million and 12.5% respectively, compared with $167.9 million and 16.3%, respectively, in the corresponding of 2023. The decrease in operating income and operating income margin for the three months ended March 30, 2024 was primarily due to lower revenue described

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

above, higher staffing and operating costs across all businesses, and charges related to recent restructuring activities, including severance and asset impairments.

Net income attributable to common shareholders decreased to $73.0 million in the three months ended March 30, 2024, from $103.1 million in the corresponding period of 2023 due principally to the decrease in operating income described above, partially offset by higher net gains on investments compared to the corresponding period in fiscal 2023.

During the three months ended March 30, 2024, our cash flows from operations was $129.9 million compared with $109.4 million for the same period in 2023. The increase was driven by timing of vendor and supplier payments and improvements across our revenue related accounts, including trade receivables, deferred revenue, and customer deposits compared to the same period in 2023.

We have undertaken restructuring actions within all reportable segments at various locations across North America, Europe and Asia. This includes workforce right-sizing actions, resulting in severance and transition costs; and costs related to the consolidation of facilities, resulting in asset impairment and accelerated depreciation charges. Restructuring charges recognized during the three months ended March 30, 2024 were approximately $17 million, of which $8 million related to asset impairment and accelerated depreciation charges and $9 million related to severance charges. We expect that these effectuated actions as well as other upcoming planned actions will result in approximately $70 million of cost savings on an annualized basis.

Three Months Ended March 30, 2024 Compared to Three Months Ended April 1, 2023

Revenue and Operating Income

The following tables present consolidated revenue by type and by reportable segment:


	Three Months Ended
	March 30, 2024		April 1, 2023		$ change		% change
	(in thousands, except percentages)
Service revenue	$	816,862	$	857,366	$	(40,504)	(4.7)	%
Product revenue	194,698		172,007		22,691		13.2	%
Total revenue	$	1,011,560	$	1,029,373	$	(17,813)	(1.7)	%


	Three Months Ended
	March 30, 2024		April 1, 2023		$ change		% change		Impact of FX
	(in thousands, except percentages)
RMS	$	220,907	$	199,766	$	21,141	10.6	%	(0.3)	%
DSA	605,452		662,353		(56,901)		(8.6)	%	0.5	%
Manufacturing	185,201		167,254		17,947		10.7	%	0.3	%
Total revenue	$	1,011,560	$	1,029,373	$	(17,813)	(1.7)	%	0.3	%

The following table presents operating income by reportable segment:


	Three Months Ended
	March 30, 2024			April 1, 2023			$ change		% change		Impact of FX
	(in thousands, except percentages)
RMS	$	43,149		$	40,409		$	2,740	6.8	%	(0.6)	%
DSA	114,839			171,431			(56,592)		(33.0)	%	0.1	%
Manufacturing	33,681			2,106			31,575		1,499.3	%	5.3	%
Unallocated corporate	(65,692)			(46,054)			(19,638)		42.6	%	0.3	%
Total operating income	$	125,977		$	167,892		$	(41,915)	(25.0)	%	(0.2)	%
Operating income % of revenue	12.5		%	16.3		%			(380) bps

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

The following presents and discusses our consolidated financial results by each of our reportable segments:

RMS


	Three Months Ended
	March 30, 2024			April 1, 2023			$ change		% change		Impact of FX
	(in thousands, except percentages)
Revenue	$	220,907		$	199,766		$	21,141	10.6	%	(0.3)	%
Cost of revenue (excluding amortization of intangible assets)	140,925			126,804			14,121		11.1	%
Selling, general and administrative	30,893			27,058			3,835		14.2	%
Amortization of intangible assets	5,940			5,495			445		8.1	%
Operating income	$	43,149		$	40,409		$	2,740	6.8	%	(0.6)	%
Operating income % of revenue	19.5		%	20.2		%			(70) bps

RMS revenue increased $21.1 million due primarily to higher large research model product revenue, principally from the recent acquisition of Noveprim, which contributed $15.1 million, and higher small research models product and service revenues; partially offset by lower revenue in our Cell Solutions business and the effect of changes in foreign currency exchange rates.

RMS operating income increased $2.7 million compared to the corresponding period in 2023 principally due to the increase in revenue noted above. RMS operating income as a percentage of revenue for the three months ended March 30, 2024 was 19.5%, a decrease of 70 bps from 20.2% for the corresponding period in 2023, principally due to higher amortization related to acquisitions, including an inventory step up recorded in cost of revenue from the Noveprim acquisition, and higher site consolidation and asset impairment charges related to recent restructuring activities.

DSA


	Three Months Ended
	March 30, 2024			April 1, 2023			$ change		% change		Impact of FX
	(in thousands, except percentages)
Revenue	$	605,452		$	662,353		$	(56,901)	(8.6)	%	0.5	%
Cost of revenue (excluding amortization of intangible assets)	417,912			411,523			6,389		1.6	%
Selling, general and administrative	56,859			61,998			(5,139)		(8.3)	%
Amortization of intangible assets	15,842			17,401			(1,559)		(9.0)	%
Operating income	$	114,839		$	171,431		$	(56,592)	(33.0)	%	0.1	%
Operating income % of revenue	19.0		%	25.9		%			(690) bps

DSA revenue decreased $56.9 million due primarily to decreased revenue in our Safety Assessment and Discovery Services businesses due to decreased volume, as well as the impact of a recently divested site related to our Safety Assessment business, which decreased revenue by $2.9 million; partially offset by the effect of changes in foreign currency exchange rates.

DSA operating income decreased $56.6 million compared to the corresponding period in 2023. DSA operating income as a percentage of revenue for the three months ended March 30, 2024 was 19.0%, a decrease of (690) bps from 25.9% for the corresponding period in 2023. Operating income and operating income as a percentage of revenue decreased primarily due to the lower revenue described above, higher operating and staffing costs, and higher severance and impairment costs related to recent restructuring activities.

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

Manufacturing


	Three Months Ended
	March 30, 2024			April 1, 2023			$ change		% change		Impact of FX
	(in thousands, except percentages)
Revenue	$	185,201		$	167,254		$	17,947	10.7	%	0.3	%
Cost of revenue (excluding amortization of intangible assets)	107,880			113,392			(5,512)		(4.9)	%
Selling, general and administrative	32,847			39,736			(6,889)		(17.3)	%
Amortization of intangible assets	10,793			12,020			(1,227)		(10.2)	%
Operating income	$	33,681		$	2,106		$	31,575	1,499.3	%	5.3	%
Operating income % of revenue	18.2		%	1.3		%			1,690 bps

Manufacturing revenue increased $17.9 million due primarily to increased revenue in both our Biologics Solutions and Microbial Solutions businesses, driven by increased volume for Biologics Testing service revenue, CDMO service revenue, and Microbial Solutions endotoxin product revenue.

Manufacturing operating income increased $31.6 million compared to the corresponding period in 2023. Manufacturing operating income as a percentage of revenue for the three months ended March 30, 2024 was 18.2%, an increase of 1,690 bps from 1.3% for the corresponding period in 2023. Operating income and operating income as a percentage of revenue increased primarily due to the higher revenue described above, along with higher operating efficiencies, and the absence of certain costs incurred during the three months ended April 1, 2023, primarily an asset impairment charge related to our Biologics Solutions business, and legal costs from an environmental litigation related to the Microbial Solutions business.

Unallocated Corporate


	Three Months Ended
	March 30, 2024			April 1, 2023			$ change		% change		Impact of FX
	(in thousands, except percentages)
Unallocated corporate	$	65,692		$	46,054		$	19,638	42.6	%	0.3	%
Unallocated corporate % of revenue	6.5		%	4.5		%			200 bps

Unallocated corporate costs consist of selling, general and administrative expenses that are not directly related or allocated to the reportable segments. The increase in unallocated corporate costs of $19.6 million, or 42.6%, compared to the corresponding period in 2023 is primarily related to higher variable compensation expenses and higher severance costs. Costs as a percentage of revenue for the three months ended March 30, 2024 were 6.5%, an increase of 200 bps from 4.5% for the corresponding period in 2023.

Other Income (Expense)











	Three Months Ended
	March 30, 2024		April 1, 2023		$ change		% change
	(in thousands, except percentages)
Other income (expense):
Interest income	$	2,202	$	806	$	1,396	173.2	%
Interest expense	(35,001)		(34,380)		(621)		1.8	%
Other income (expense), net	5,833		(3,277)		9,110		(278.0)	%
Total other expense, net	$	(26,966)	$	(36,851)	$	9,885	(26.8)	%

Interest income for the three months ended March 30, 2024 was $2.2 million, an increase of $1.4 million, or 173.2%, driven primarily from higher interest rates.

Other income, net for the three months ended March 30, 2024 was $5.8 million, an increase of $9.1 million, or 278.0%, compared to Other expense, net of $3.3 million for the corresponding period in 2023. The increase was due primarily to venture capital investment gains of $8.2 million as compared to losses of $6.8 million in the corresponding period in 2023, partially offset by strategic equity investment losses of $2.3 million as compared to gains of $3.6 million in the corresponding period in 2023.

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

Income Taxes


	Three Months Ended
	March 30, 2024			April 1, 2023			$ change		% change
	(in thousands, except percentages)
Provision for income taxes	$	24,529		$	27,087		$	(2,558)	(9.4)	%
Effective tax rate	24.8		%	20.7		%			410 bps

Income tax expense for the three months ended March 30, 2024 was $24.5 million, a decrease of $2.6 million compared to $27.1 million for the corresponding period in 2023. Our effective tax rate was 24.8% for the three months ended March 30, 2024 compared to 20.7% for the corresponding period in 2023. The increase in our effective tax rate in the three months ended March 30, 2024 compared to the corresponding period in 2023 was primarily attributable to unfavorable tax effects from stock-based compensation deductions in the three months ended March 30, 2024.

Our global operations make the effective tax rate sensitive to significant tax law changes. Several countries where we operate have enacted legislation implementing the Organization for Economic Cooperation and Development’s (OECD) international tax framework, including the Pillar II global minimum tax rate with effect from January 1, 2024 or later. We continue to monitor future legislation, however, the tax expense accrued for the three months ended March 30, 2024, is not material to the unaudited consolidated financial statements.

Liquidity and Capital Resources

Liquidity and Cash Flows

We currently require cash to fund our working capital needs, capital expansion, acquisitions, and to pay our debt, lease, venture capital investment, and pension obligations. Our principal sources of liquidity have been our cash flows from operations, supplemented by long-term borrowings. Based on our current business plan, we believe that our existing funds, when combined with cash generated from operations and our access to financing resources, are sufficient to fund our operations for the foreseeable future.

The following table presents our cash, cash equivalents and short-term investments:


	March 30, 2024		December 30, 2023
	(in thousands)
Cash and cash equivalents:
Held in U.S. entities	$	15,876	$	2,234
Held in non-U.S. entities	311,163		274,537
Total cash and cash equivalents	327,039		276,771
Short-term investments:
Held in non-U.S. entities	10,065		68
Total cash, cash equivalents and short-term investments	$	337,104	$	276,839

The following table presents our net cash provided by operating activities:


	Three Months Ended
	March 30, 2024		April 1, 2023
	(in thousands)
Net income	$	74,482	$	103,954
Adjustments to reconcile net income to net cash provided by operating activities	103,498		97,373
Changes in assets and liabilities	(48,092)		(91,944)
Net cash provided by operating activities	$	129,888	$	109,383

Net cash provided by cash flows from operating activities represents the cash receipts and disbursements related to all of our activities other than investing and financing activities. Operating cash flow is derived by adjusting our net income for (1) non-cash operating items such as depreciation and amortization, stock-based compensation, loss on debt extinguishment and other financing costs, deferred income taxes, gains and/or losses on venture capital and strategic equity investments, gains and/or losses on divestitures, contingent consideration, as well as (2) changes in operating assets and liabilities, which reflect timing differences between the receipt and payment of cash associated with transactions and when they are recognized in our results of operations. For the three months ended March 30, 2024, compared to the three months ended April 1, 2023, the increase in net cash provided by operating activities was primarily driven by timing of vendor and supplier payments and improvements across

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

our revenue related accounts, including trade receivables, deferred revenue, and customer deposits compared to the same period in 2023.

The following table presents our net cash used in investing activities:


	Three Months Ended
	March 30, 2024		April 1, 2023
	(in thousands)
Acquisition of businesses and assets, net of cash acquired	$	—	$	(50,166)
Capital expenditures	(79,144)		(106,875)
Investments, net	(6,365)		(10,617)

Other, net	(283)		(960)
Net cash used in investing activities	$	(85,792)	$	(168,618)

For the three months ended March 30, 2024, the primary use of cash used in investing activities related to capital expenditures to support the growth of the business and investments in certain venture capital and strategic equity investments.

For the three months ended April 1, 2023, the primary use of cash used in investing activities related to capital expenditures to support the growth of the business, the acquisition of SAMDI, and investments in certain venture capital and strategic equity investments.

The following table presents our net cash provided by financing activities:


	Three Months Ended
	March 30, 2024		April 1, 2023
	(in thousands)
Proceeds from long-term debt and revolving credit facility	$	300,882	$	192,500
Proceeds from exercises of stock options	21,505		11,792
Payments on long-term debt, revolving credit facility, and finance lease obligations	(292,482)		(157,328)
Purchase of treasury stock	(9,351)		(19,012)


Payment of contingent considerations	—		(2,711)
Other, net	(2,208)		—
Net cash provided by financing activities	$	18,346	$	25,241

For the three months ended March 30, 2024, net cash provided by financing activities was primarily driven by the following activity:

•Net proceeds of $4.3 million from our Credit Facility

•Net proceeds from exercises of employee stock options of $21.5 million

•Treasury stock purchases of $9.4 million made due to the netting of common stock upon vesting of stock-based awards in order to satisfy individual statutory tax withholding requirements

•Dividend payments of $2.2 million to noncontrolling interests

For the three months ended April 1, 2023, net cash provided by financing activities was primarily driven by the following activity:

•Net proceeds of $35.2 million from our Credit Facility

•Net proceeds from exercises of employee stock options of $11.8 million

•Treasury stock purchases of $19.0 million made due to the netting of common stock upon vesting of stock-based awards in order to satisfy individual statutory tax withholding requirements, and

•Contingent consideration payments of $2.7 million

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

Financing and Market Risk

We are exposed to market risk from changes in interest rates and currency exchange rates, which could affect our future results of operations and financial condition. We manage our exposure to these risks through our regular operating and financing activities.

Amounts outstanding under our Credit Facility and our Senior Notes were as follows:


	March 30, 2024		December 30, 2023
	(in thousands)
Revolving facility	$	1,133,000	$	1,129,243
4.25% Senior Notes due 2028	500,000		500,000
3.75% Senior Notes due 2029	500,000		500,000
4.00% Senior Notes due 2031	500,000		500,000
Total	$	2,633,000	$	2,629,243

The interest rates applicable to the Credit Facility are equal to (A) for revolving loans denominated in U.S. dollars, at our option, either the base rate (which is the higher of (1) the prime rate, (2) the federal funds rate plus 0.50%, or (3) the one-month adjusted term SOFR rate plus 1%) or the adjusted term SOFR rate, (B) for revolving loans denominated in euros, the adjusted EURIBOR rate and (C) for revolving loans denominated in sterling, the daily simple SONIA rate, in each case, plus an interest rate margin based upon our leverage ratio.

We have an interest rate swap with a notional amount of $500 million to manage interest rate fluctuation related to our floating rate borrowings under the Credit Facility, at a fixed rate of 4.65% on our swap maturing November 2, 2024.

Our off-balance sheet commitments related to our outstanding letters of credit as of March 30, 2024 and December 30, 2023 were $21.2 million and $21.6 million, respectively.

Foreign Currency Exchange Rate Risk

We operate on a global basis and have exposure to foreign currency exchange rate fluctuations for our financial position, results of operations, and cash flows.

While the financial results of our global activities are reported in U.S. dollars, our foreign subsidiaries typically conduct their operations in their respective local currency. The principal functional currencies of the Company’s foreign subsidiaries are the Euro, British Pound and Canadian Dollar. During the three months ended March 30, 2024, the most significant drivers of foreign currency translation adjustment the Company recorded as part of Other comprehensive income (loss) were the Euro, Mauritian Rupee, Swedish Krona, and Canadian Dollar.

Fluctuations in the foreign currency exchange rates of the countries in which we do business will affect our financial position, results of operations, and cash flows. As the U.S. dollar strengthens against other currencies, the value of our non-U.S. revenue, expenses, assets, liabilities, and cash flows will generally decline when reported in U.S. dollars. The impact to net income as a result of a U.S. dollar strengthening will be partially mitigated by the value of non-U.S. expenses, which will decline when reported in U.S. dollars. As the U.S. dollar weakens versus other currencies, the value of the non-U.S. revenue, expenses, assets, liabilities, and cash flows will generally increase when reported in U.S. dollars. For the three months ended March 30, 2024, our revenue would have decreased by $32.8 million, and our operating income would have decreased by $2.4 million, if the U.S. dollar exchange rate had strengthened by 10%, with all other variables held constant.

We attempt to minimize this exposure by using certain financial instruments in accordance with our overall risk management and our hedge policy. We do not enter into speculative derivative agreements.

Repurchases of Common Stock

During the three months ended March 30, 2024, we did not repurchase any shares under our authorized stock repurchase program. As of March 30, 2024, we had $129.1 million remaining on the authorized $1.3 billion stock repurchase program. Our stock-based compensation plans permit the netting of common stock upon vesting of restricted stock, restricted stock units, and performance share units in order to satisfy individual statutory tax withholding requirements. During the three months ended March 30, 2024, we acquired 0.1 million shares for $9.4 million through such netting.

Critical Accounting Policies and Estimates

Our discussion and analysis of our financial condition and results of operations is based upon our consolidated financial statements prepared in accordance with generally accepted accounting principles in the U.S. The preparation of these financial statements requires us to make certain estimates and assumptions that may affect the reported amounts of assets and liabilities, the reported amounts of revenues and expenses during the reported periods, and the related disclosures. These estimates and

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

assumptions are monitored and analyzed by us for changes in facts and circumstances, and material changes in these estimates could occur in the future. We base our estimates on our historical experience, trends in the industry, and various other factors that are believed to be reasonable under the circumstances. Actual results may differ from our estimates under different assumptions or conditions.

We believe that the application of our accounting policies, each of which require significant judgments and estimates on the part of management, are the most critical to aid in fully understanding and evaluating our reported financial results. Our significant accounting policies are more fully described in Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations” of our Annual Report on Form 10-K for fiscal year 2023. There have been no changes in the Company’s critical accounting policies during the three months ended March 30, 2024.

Recent Accounting Pronouncements

For a discussion of recent accounting pronouncements please refer to Note 1, “Basis of Presentation,” in this Quarterly Report on Form 10-Q. Other than as discussed in Note 1, “Basis of Presentation,” we did not adopt any other new accounting pronouncements during the three months ended March 30, 2024 that had a significant effect on our unaudited condensed consolidated financial statements included in this Quarterly Report on Form 10-Q.

Item 3. Quantitative and Qualitative Disclosures about Market Risk

The Company’s exposure to market risk from changes in interest rates and currency exchange rates has not changed materially from its exposure discussed in the Company’s Annual Report on Form 10-K for the fiscal year ended December 30, 2023. Our interest rate and currency exchange rate risks are fully described in Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations - Liquidity and Capital Resources” of our Annual Report on Form 10-K for fiscal year 2023 and in Item 2, “Management’s Discussion and Analysis of Financial Condition and Results of Operations - Liquidity and Capital Resources” herein.

Item 4. Controls and Procedures

(a) Evaluation of Disclosure Controls and Procedures

Based on their evaluation, required by paragraph (b) of Rules 13a-15 or 15d-15, promulgated by the Securities Exchange Act of 1934, as amended (Exchange Act), the Company’s principal executive officer and principal financial officer have concluded that the Company’s disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) of the Exchange Act, are effective, at a reasonable assurance level, as of March 30, 2024, to ensure that information required to be disclosed by the Company in reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in Securities and Exchange Commission rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by the Company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the Company’s management, including its principal executive and principal financial officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, our management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurances of achieving the desired control objectives, and management necessarily was required to apply its judgment in designing and evaluating the controls and procedures.

(b) Changes in Internal Controls Over Financial Reporting

There were no material changes in the Company’s internal control over financial reporting identified in connection with the evaluation required by paragraph (d) of the Exchange Act Rules 13a-15 or 15d-15 that occurred during the quarter ended March 30, 2024 that materially affected, or were reasonably likely to materially affect, the Company’s internal control over financial reporting.

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

PART II. OTHER INFORMATION

Item 1. Legal Proceedings

On February 16, 2023, the Company was informed by the U.S. Department of Justice (DOJ) that in conjunction with the U.S. Fish and Wildlife Service (USFWS), it had commenced an investigation into the Company’s conduct regarding several shipments of non-human primates from Cambodia. On February 17, 2023 the Company received a grand jury subpoena requesting certain documents related to such investigation. The Company is aware of a parallel civil investigation being undertaken by the DOJ and USFWS. The Company is cooperating with the DOJ and the USFWS and believes that the concerns raised with respect to the Company’s conduct are without merit. The Company maintains a global supplier onboarding and oversight program incorporating risk-based due diligence, auditing, and monitoring practices to help ensure the quality of our supplier relationships and compliance with applicable U.S. and international laws and regulations, and has operated under the belief that all shipments of non-human primates it received satisfied the material requirements, documentation and related processes and procedures of the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) documentation and related processes and procedures, which guides the release of each import by USFWS. Notwithstanding our efforts and good-faith belief, in connection with the civil investigation, the Company has voluntarily suspended future shipments of non-human primates from Cambodia to the United States until such time that the Company and USFWS can agree upon and implement additional procedures to reasonably ensure that non-human primates imported from Cambodia are purpose-bred. The Company continues to care for the Cambodia-sourced non-human primates from certain shipments in the United States. The carrying value of the inventory related to these shipments is approximately $27 million as of March 30, 2024, which reflects the value of the shipments in accordance with the Company’s inventory accounting policy. On May 16, 2023, the Company received an inquiry from the Enforcement Division of the U.S. Securities and Exchange Commission (SEC) requesting it to voluntarily provide information, subsequently augmented with a document subpoena, primarily related to the sourcing of non-human primates, and the Company is cooperating with the request. We are not able to predict what action, if any, might be taken in the future by the DOJ, USFWS, SEC or other governmental authorities as a result of the investigations. None of the DOJ, USFWS or SEC has provided the Company with any specific timeline or indication as to when these investigations or, specific to the DOJ and USFWS, discussions regarding future processes and procedures, will be concluded or resolved. The Company cannot predict the timing, outcome or possible impact of the investigations, including without limitation any potential fines, penalties or liabilities.

A putative securities class action (Securities Class Action) was filed on May 19, 2023 against the Company and a number of its current/former officers in the United States District Court for the District of Massachusetts. On August 31, 2023, the court appointed the State Teachers Retirement System of Ohio as lead plaintiff. An amended complaint was filed on November 14, 2023 that, among other things, included only James Foster, the Chief Executive Officer and David R. Smith, the former Chief Financial Officer as defendants along with the Company. The amended complaint asserts claims under §§ 10(b) and 20(a) of the Securities Exchange Act of 1934 (the Exchange Act) on behalf of a putative class of purchasers of Company securities from May 5, 2020 through February 21, 2023, alleging that certain of the Company’s disclosures about its practices with respect to the importation of non-human primates made during the putative class period were materially false or misleading. The Company filed a motion to dismiss. While the Company cannot predict the outcome of this matter, it believes the class action to be without merit and plans to vigorously defend against it. The Company cannot reasonably estimate the maximum potential exposure or the range of possible loss in association with this matter.

Item 1A. Risk Factors

In addition to the other information set forth in this report, you should carefully consider the factors discussed in Part I, “Item 1A. Risk Factors” in our Annual Report on Form 10-K for fiscal year 2023, which could materially affect our business, financial condition, and/or future results. The risks described in our Annual Report on Form 10-K are not the only risks we face.

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may materially adversely affect our business, financial condition, and/or operating results. There have been no material changes to the risk factors set forth in our Annual Report on Form 10-K for fiscal year 2023.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

The following table provides information relating to the purchases of shares of our common stock during the three months ended March 30, 2024.


	Total Number of Shares Purchased	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Approximate Dollar Value of Shares That May Yet Be Purchased Under the Plans or Programs
					(in thousands)
December 31, 2023 to January 27, 2024	5,418	$	213.32	—	$	129,105
January 28, 2024 to February 24, 2024	36,482	221.71		—	129,105
February 25, 2024 to March 30, 2024	26	254.19		—	129,105
Total	41,926			—

Our Board of Directors have authorized up to an aggregate amount of $1.3 billion for our stock repurchase program. During the three months ended March 30, 2024, we did not repurchase any shares of common stock under our stock repurchase program or in open market trading. As of March 30, 2024, we had $129.1 million remaining on the authorized stock repurchase program.

Additionally, our stock-based compensation plans permit the netting of common stock upon vesting of restricted stock, restricted stock units, and performance share units in order to satisfy individual statutory tax withholding requirements.

Item 5. Other Information

During the quarter ended March 30, 2024, none of our officers or directors adopted or terminated any contract, instruction, or written plan for the purchase or sale of our securities that was intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act or any “non-Rule 10b5-1 trading arrangement” as defined in Item 408(c) of Regulation S-K., except as follows:

•On February 26, 2024, James Foster, our Chair, President, and Chief Executive Officer, entered into a Rule 10b5-1 trading arrangement for the sale of up to 129,721 shares of common stock. The arrangement’s expiration date is June 30, 2026.

•On March 4, 2024, Shannon Parisotto, our Corporate Executive Vice President, Global Discovery & Safety Assessment entered into a Rule 10b5-1 trading arrangement for the sale of up to 10,170 shares of common stock, subject to certain conditions. The arrangement’s expiration date is February 28, 2025.

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

Item 6. Exhibits


(a) Exhibits			Description of Exhibits
31.1			Rule 13a-14(a)/15d-14(a) Certification of Chief Executive Officer
31.2			Rule 13a-14(a)/15d-14(a) Certification of Chief Financial Officer
32.1+			Certification of the Principal Executive Officer and the Principal Financial Officer required by Rule 13a-14(a) of 15d-14(a) of the Exchange Act
101.INS			eXtensible Business Reporting Language (XBRL) Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
101.SCH			XBRL Taxonomy Extension Schema Document
101.CAL			XBRL Taxonomy Calculation Linkbase Document
101.DEF			XBRL Taxonomy Definition Linkbase Document
101.LAB			XBRL Taxonomy Label Linkbase Document
101.PRE			XBRL Taxonomy Presentation Linkbase Document

+ Furnished herein.

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.


						CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

			May 9, 2024			/s/ JAMES C. FOSTER
						James C. Foster Chairman, President and Chief Executive Officer

			May 9, 2024			/s/ FLAVIA H. PEASE
						Flavia H. Pease Corporate Executive Vice President and Chief Financial Officer

Exhibit 31.1

CERTIFICATION PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

AND RULE 13a-14(a)/15d-14(a) OF THE EXCHANGE ACT OF 1934

I, James C. Foster, Chairman, President and Chief Executive Officer of Charles River Laboratories International, Inc. (the registrant) certify that:

1. I have reviewed this quarterly report on Form 10-Q for the quarter ended March 30, 2024 of the registrant;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures as of the end of the period covered by this report based on such evaluation; and

d. disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a. all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.


									/s/ James C. Foster
			May 9, 2024						James C. Foster Chairman, President and Chief Executive Officer Charles River Laboratories International, Inc.

Exhibit 31.2

CERTIFICATION PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

AND RULE 13a-14(a)/15d-14(a) OF THE EXCHANGE ACT OF 1934

I, Flavia H. Pease, Corporate Executive Vice President and Chief Financial Officer of Charles River Laboratories International, Inc. (the registrant) certify that:

1. I have reviewed this quarterly report on Form 10-Q for the quarter ended March 30, 2024 of the registrant;

b. any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.


									/s/ Flavia H. Pease
			May 9, 2024						Flavia H. Pease Corporate Executive Vice President and Chief Financial Officer Charles River Laboratories International, Inc.

Exhibit 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the quarterly report on Form 10-Q for the quarter ended March 30, 2024 of Charles River Laboratories International, Inc. (the “Company”) as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, James C. Foster, Chairman, President and Chief Executive Officer of the Company, and Flavia H. Pease, Corporate Executive Vice President and Chief Financial Officer of the Company, each hereby certifies, to the best of his knowledge and pursuant to 18 U.S.C. Section 1350, that:

(1) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (the “Exchange Act”); and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ James C. Foster

May 9, 2024

James C. Foster

Chairman, President and Chief Executive Officer

Charles River Laboratories International, Inc.

/s/ Flavia H. Pease

May 9, 2024

Flavia H. Pease

Corporate Executive Vice President and Chief Financial Officer

Charles River Laboratories International, Inc.

This certification shall not be deemed "filed" for any purpose, nor shall it be deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Exchange Act.

Cover Page - shares	3 Months Ended
Cover Page - shares	Mar. 30, 2024	Apr. 27, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 30, 2024
Document Transition Report	false
Entity File Number	001-15943
Entity Registrant Name	CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	06-1397316
Entity Address, Address Line One	251 Ballardvale Street
Entity Address, City or Town	Wilmington
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01887
City Area Code	781
Local Phone Number	222-6000
Title of 12(b) Security	Common stock, $0.01 par value
Trading Symbol	CRL
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Smaller Reporting Company	false
Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		51,511,687
Entity Central Index Key	0001100682
Current Fiscal Year End Date	--12-28
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Amendment Flag	false

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Total revenue	$ 1,011,560	$ 1,029,373
Costs and expenses:
Cost of revenue (excluding amortization of intangible assets)	666,717	651,719
Selling, general and administrative	186,291	174,846
Amortization of intangible assets	32,575	34,916
Operating income	125,977	167,892
Other income (expense):
Interest income	2,202	806
Interest expense	(35,001)	(34,380)
Other income (expense), net	5,833	(3,277)
Income before income taxes	99,011	131,041
Provision for income taxes	24,529	27,087
Net income	74,482	103,954
Less: Net income attributable to noncontrolling interests	1,522	823
Net income available to Charles River Laboratories International, Inc.	72,960	103,131
Preferred Stock Dividends and Other Adjustments [Abstract]
Net income available to Charles River Laboratories International, Inc.	72,960	103,131
Less: Adjustment of redeemable noncontrolling interest	401	0
Less: Incremental dividends attributable to noncontrolling interest holders	5,230	0
Net income available to Charles River Laboratories International, Inc. common shareholders	$ 67,329	$ 103,131
Net income attributable to common shareholders:
Basic (in dollars per share)	$ 1.31	$ 2.02
Diluted (in dollars per share)	$ 1.30	$ 2.01
Weighted-average number of common shares outstanding:
Basic (in shares)	51,437	51,097
Diluted (in shares)	51,842	51,428
Cost of services provided (excluding amortization of intangible assets)
Total revenue	$ 816,862	$ 857,366
Costs and expenses:
Cost of revenue (excluding amortization of intangible assets)	578,164	565,477
Cost of products sold (excluding amortization of intangible assets)
Total revenue	194,698	172,007
Costs and expenses:
Cost of revenue (excluding amortization of intangible assets)	$ 88,553	$ 86,242

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 74,482	$ 103,954
Other comprehensive income (loss):
Foreign currency translation adjustment	(62,840)	23,313
Amortization of net loss, settlement losses, and prior service benefit included in total cost for pension and other post-retirement benefit plans	344	170
Unrealized gains (losses) on hedging instruments	768	(1,402)
Other comprehensive income (loss), before income taxes	(61,728)	22,081
Less: Income tax benefit related to items of other comprehensive income	(5,473)	(1,038)
Comprehensive income, net of income taxes	18,227	127,073
Less: Comprehensive income (loss) related to noncontrolling interests, net of income taxes	(1,241)	1,009
Comprehensive income attributable to Charles River Laboratories International, Inc., net of income taxes	$ 19,468	$ 126,064

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 30, 2023
Current assets:
Cash and cash equivalents	$ 327,039	$ 276,771
Trade receivables and contract assets, net of allowances for credit losses of $25,407 and $25,722, respectively	786,980	780,375
Inventories	361,281	380,259
Prepaid assets	93,834	87,879
Other current assets	99,054	83,378
Total current assets	1,668,188	1,608,662
Property, plant and equipment, net	1,618,708	1,639,741
Venture capital and strategic equity investments	243,543	243,811
Operating lease right-of-use assets, net	384,394	394,029
Goodwill	3,070,241	3,095,045
Intangible assets, net	827,638	864,051
Deferred tax assets	36,924	40,279
Other assets	303,147	309,383
Total assets	8,152,783	8,195,001
Current liabilities:
Accounts payable	129,682	168,937
Accrued compensation	189,606	213,290
Deferred revenue	256,383	241,820
Accrued liabilities	190,892	227,825
Other current liabilities	188,247	203,210
Total current liabilities	954,810	1,055,082
Long-term debt, net and finance leases	2,660,459	2,647,147
Operating lease right-of-use liabilities	418,054	419,234
Deferred tax liabilities	180,094	191,349
Other long-term liabilities	235,441	223,191
Total liabilities	4,448,858	4,536,003
Commitments and contingencies (Notes 2, 11, 13, and 15)
Redeemable noncontrolling interest	57,775	56,722
Equity:
Preferred stock, $0.01 par value; 20,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.01 par value; 120,000 shares authorized; 51,552 shares issued and 51,510 shares outstanding as of March 30, 2024, and 51,338 shares issued and outstanding as of December 30, 2023	515	513
Additional paid-in capital	1,939,413	1,905,578
Retained earnings	1,959,777	1,887,218
Treasury stock, at cost, 42 and zero shares, as of March 30, 2024 and December 30, 2023, respectively	(9,351)	0
Accumulated other comprehensive loss	(249,919)	(196,427)
Total Charles River Laboratories International, Inc. equity	3,640,435	3,596,882
Nonredeemable noncontrolling interests	5,715	5,394
Total equity	3,646,150	3,602,276
Total liabilities, noncontrolling interests and equity	$ 8,152,783	$ 8,195,001

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 30, 2023
Statement of Financial Position [Abstract]
Less: Allowance for credit losses	$ 25,407	$ 25,722
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	120,000,000	120,000,000
Common stock, shares issued (in shares)	51,552,000	51,338,000
Common stock, shares outstanding (in shares)	51,510,000	51,338,000
Treasury stock, shares (in shares)	42,000	0

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Cash flows relating to operating activities
Net income	$ 74,482	$ 103,954
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	85,357	77,069
Stock-based compensation	16,738	13,460
Deferred income taxes	(987)	(11,584)
Long-lived asset impairment charges	5,432	10,460
(Gain) loss on venture capital and strategic equity investments, net	(5,880)	3,282
Provision for credit losses	839	3,238
Other, net	1,999	1,448
Changes in assets and liabilities:
Trade receivables and contract assets, net	(17,281)	(33,831)
Inventories	5,600	(8,587)
Accounts payable	(8,541)	(41,313)
Accrued compensation	(20,945)	(21,469)
Deferred revenue	19,957	(481)
Customer contract deposits	6,140	1,509
Other assets and liabilities, net	(33,022)	12,228
Net cash provided by operating activities	129,888	109,383
Cash flows relating to investing activities
Acquisition of businesses and assets, net of cash acquired	0	(50,166)
Capital expenditures	(79,144)	(106,875)
Purchases of investments and contributions to venture capital investments	(13,867)	(12,570)
Proceeds from sale of investments	7,502	1,953
Other, net	(283)	(960)
Net cash used in investing activities	(85,792)	(168,618)
Cash flows relating to financing activities
Proceeds from long-term debt and revolving credit facility	300,882	192,500
Proceeds from exercises of stock options	21,505	11,792
Payments on long-term debt, revolving credit facility, and finance lease obligations	(292,482)	(157,328)
Purchase of treasury stock	(9,351)	(19,012)
Payments of contingent consideration	0	(2,711)
Other, net	(2,208)	0
Net cash provided by financing activities	18,346	25,241
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(8,387)	1,671
Net change in cash, cash equivalents, and restricted cash	54,055	(32,323)
Cash, cash equivalents, and restricted cash, beginning of period	284,480	241,214
Cash, cash equivalents, and restricted cash, end of period	$ 338,535	$ 208,891

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY AND REDEEMABLE NONCONTROLLING INTERESTS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	Total	Total Charles River Laboratories, Inc. Equity	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Noncontrolling Interest
Beginning balance at Dec. 31, 2022	$ 42,427
Increase (Decrease) in Temporary Equity
Net income	322
Other comprehensive (loss), net of tax	186
Ending balance at Apr. 01, 2023	42,935
Beginning balance (in shares) at Dec. 31, 2022			50,944
Beginning balance at Dec. 31, 2022	2,981,078	$ 2,976,293	$ 509	$ 1,804,940	$ 1,432,901	$ (262,057)	$ 0	$ 4,785
Beginning balance (in shares) at Dec. 31, 2022							0
Increase (Decrease) in Stockholders' Equity
Net income	103,632	103,131			103,131			501
Other comprehensive (loss), net of tax	22,933	22,933				22,933
Adjustment of redeemable noncontrolling interests to redemption value	0
Issuance of stock under employee compensation plans (in shares)			316
Issuance of stock under employee compensation plans	11,792	11,792	$ 3	11,789
Purchase of treasury shares (in shares)							78
Purchase of treasury shares	(19,012)	(19,012)					$ (19,012)
Stock-based compensation	13,460	13,460		13,460
Ending balance (in shares) at Apr. 01, 2023			51,260
Ending balance at Apr. 01, 2023	3,113,883	3,108,597	$ 512	1,830,189	1,536,032	(239,124)	$ (19,012)	5,286
Ending balance (in shares) at Apr. 01, 2023							78
Beginning balance at Dec. 30, 2023	56,722
Increase (Decrease) in Temporary Equity
Net income	1,201
Other comprehensive (loss), net of tax	(2,763)
Adjustment of redeemable noncontrolling interests to redemption value	4,807
Dividends to noncontrolling interests	(2,192)
Ending balance at Mar. 30, 2024	$ 57,775
Beginning balance (in shares) at Dec. 30, 2023	51,338		51,338
Beginning balance at Dec. 30, 2023	$ 3,602,276	3,596,882	$ 513	1,905,578	1,887,218	(196,427)	$ 0	5,394
Beginning balance (in shares) at Dec. 30, 2023	0						0
Increase (Decrease) in Stockholders' Equity
Net income	$ 73,281	72,960			72,960			321
Other comprehensive (loss), net of tax	(53,492)	(53,492)				(53,492)
Adjustment of redeemable noncontrolling interests to redemption value	(4,807)	(4,807)		(4,406)	(401)
Dividends to noncontrolling interests	0
Issuance of stock under employee compensation plans (in shares)			214
Issuance of stock under employee compensation plans	21,505	21,505	$ 2	21,503
Purchase of treasury shares (in shares)							42
Purchase of treasury shares	(9,351)	(9,351)					$ (9,351)
Stock-based compensation	$ 16,738	16,738		16,738
Ending balance (in shares) at Mar. 30, 2024	51,510		51,552
Ending balance at Mar. 30, 2024	$ 3,646,150	$ 3,640,435	$ 515	$ 1,939,413	$ 1,959,777	$ (249,919)	$ (9,351)	$ 5,715
Ending balance (in shares) at Mar. 30, 2024	42						42

BASIS OF PRESENTATION	3 Months Ended
BASIS OF PRESENTATION	Mar. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION	BASIS OF PRESENTATION The accompanying condensed consolidated financial statements are unaudited and have been prepared by Charles River Laboratories International, Inc. (the Company) in accordance with accounting principles generally accepted in the United States (U.S. GAAP) and pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). The year-end condensed consolidated balance sheet data was derived from the Company’s audited consolidated financial statements, but does not include all disclosures required by U.S. GAAP. These unaudited condensed consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for fiscal year 2023. Certain reclassifications of prior year amounts have been made to conform to the current year presentation. The unaudited condensed consolidated financial statements, in the opinion of management, reflect all normal and recurring adjustments necessary for a fair statement of the Company’s financial position and results of operations. Use of Estimates The preparation of unaudited condensed consolidated financial statements in accordance with U.S. GAAP requires that the Company make estimates and judgments that may affect the reported amounts of assets, liabilities, revenues, expenses and related disclosure of contingent assets and liabilities. On an on-going basis, the Company evaluates its estimates, judgments, and methodologies. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Actual results may differ from these estimates under different assumptions or conditions. Changes in estimates are reflected in reported results in the period in which they become known. Newly Issued Accounting Pronouncements In November 2023, the FASB issued ASU 2023-07, “Improvements to Reportable Segment Disclosures (Topic 280)”. ASU 2023-07 modifies reportable segment disclosure requirements, primarily through enhanced disclosures about segment expenses categorized as significant or regularly provided to the Chief Operating Decision Maker (CODM). In addition, the amendments enhance interim disclosure requirements, clarify circumstances in which an entity can disclose multiple segment measures of profit or loss, and contain other disclosure requirements. The purpose of the amendments is to enable investors to better understand an entity’s overall performance and assess potential future cash flows. This ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted and the amendments in this update are required to be applied on a retrospective basis. The Company is currently evaluating the impact this new standard will have on the related disclosures in the annual consolidated financial statements, but does not believe there will be a material impact. In December 2023, the FASB issued ASU 2023-09, “Improvements to Income Tax Disclosures (Topic 740)”. ASU 2023-09 requires enhanced disclosures on income taxes paid, adds disaggregation of continuing operations before income taxes between foreign and domestic earnings and defines specific categories for the reconciliation of jurisdictional tax rate to effective tax rate. This ASU is effective for fiscal years beginning after December 15, 2024, and can be applied on a prospective basis. The Company is currently evaluating the impact this new standard will have on the related disclosures on the consolidated financial statements. Summary of Significant Accounting Policies The Company’s significant accounting policies are described in Note 1, “Description of Business and Summary of Significant Accounting Policies” in the Company’s Annual Report on Form 10-K for fiscal year 2023. Consolidation The Company’s unaudited condensed consolidated financial statements reflect its financial statements and those of its subsidiaries in which the Company holds a controlling financial interest. For consolidated entities in which the Company owns or is exposed to less than 100% of the economics, the Company records net income (loss) attributable to noncontrolling interests in its unaudited condensed consolidated statements of income equal to the percentage of the economic or ownership interest retained in such entities by the respective noncontrolling parties. Redeemable noncontrolling interests, where the noncontrolling interest holders have the ability to require the Company to purchase the remaining interests, are classified in the mezzanine section of the unaudited condensed consolidated balance sheets, which is presented above the equity section and below liabilities. Intercompany balances and transactions are eliminated in consolidation. The Company’s fiscal year is typically based on 52-weeks, with each quarter composed of 13 weeks ending on the last Saturday on, or closest to, March 31, June 30, September 30, and December 31. A 53rd week in the fourth quarter of the fiscal year is occasionally necessary to align with a December 31 calendar year-end. Segment Reporting The Company reports its results in three reportable segments: Research Models and Services (RMS), Discovery and Safety Assessment (DSA), and Manufacturing Solutions (Manufacturing). The Company’s RMS reportable segment includes the Research Models, Research Model Services, and Cell Solutions businesses. Research Models includes the commercial production and sale of small research models, as well as the supply of large research models. Research Model Services includes: Insourcing Solutions (IS), which provides colony management of clients’ research operations (including recruitment, training, staffing, and management services) within the clients’ facilities and utilizing the Charles River Accelerator and Development Lab (CRADL™) offering, which provides vivarium space to clients, Genetically Engineered Models and Services (GEMS), which performs contract breeding and other services associated with genetically engineered models, and Research Animal Diagnostic Services (RADS), which provides health monitoring and diagnostics services related to research models; and Cell Solutions, which supplies controlled, consistent, customized primary cells and blood components derived from normal and mobilized peripheral blood and bone marrow. The Company’s DSA reportable segment includes two businesses: Discovery Services and Safety Assessment. The Company provides regulated and non-regulated DSA services to support the research, development, and regulatory-required safety testing of potential new drugs, including therapeutic discovery and optimization plus in vitro and in vivo studies, laboratory support services, and strategic non-clinical consulting and program management to support product development. The Company’s Manufacturing reportable segment includes Microbial Solutions, which provides in vitro (non-animal) lot-release testing products, microbial detection products, and species identification services and Biologics Solutions (Biologics), which performs specialized testing of biologics (Biologics Testing Solutions) as well as contract development and manufacturing products and services (CDMO).

ACQUISITIONS AND DIVESTITURES

3 Months Ended

Mar. 30, 2024

Business Combination and Asset Acquisition [Abstract]

ACQUISITIONS AND DIVESTITURES

Fiscal 2023 Acquisition

Noveprim Group

SAMDI Tech, Inc.

Purchase price information

The purchase price allocation was as follows:


	Noveprim Group(1)		SAMDI Tech, Inc.
	November 30, 2023		January 27, 2023
	(in thousands)
Trade receivables	$	1,308	$	513
Inventories	66,500		—
Other current assets (excluding cash)	3,467		75
Property, plant and equipment	35,831		593
Operating lease right-of-use asset, net	104		—
Goodwill (2)	172,846		37,129
Definite-lived intangible assets	9,500		33,070
Other long-term assets (3)	167,907		6
Deferred revenue	—		(43)
Other current liabilities	(16,378)		(351)
Operating lease right-of-use liabilities (Long-term)	(97)		—
Deferred tax liabilities	(12,984)		(8,191)
Other long-term liabilities	(7,796)		—
Redeemable noncontrolling interest (4)	(45,374)		—
Total purchase price allocation	$	374,834	$	62,801

(1) Purchase price allocation is preliminary and subject to change as additional information becomes available concerning the fair value and tax basis of the assets acquired and liabilities assumed, including certain contracts, obligations, and finalization of any working capital adjustments. Any additional adjustments to the purchase price allocation will be made as soon as practicable but no later than one year from the date of acquisition.
(2) The goodwill resulting from these transactions is primarily attributable to the potential growth of the Company’s segments from new customers introduced to the acquired businesses or synergies to be realized from acquiring an internal supplier servicing the DSA business and the assembled workforce of the acquirees, thus is not deductible for tax purposes.
(3) Other long-term assets acquired from the Noveprim acquisition include $167.8 million of biological assets, which will be amortized over an estimated eight-year useful life.
(4) Refer to Note 12. Equity and Noncontrolling Interests for further a description of the 10% noncontrolling interest fair value.

The definite-lived intangible assets acquired were as follows:


	Noveprim Group		SAMDI Tech, Inc.
Definite-Lived Intangible Assets	(in thousands)
Client relationships	$	—	$	23,400
Other intangible assets	9,500		9,670
Total definite-lived intangible assets	$	9,500	$	33,070

Weighted Average Amortization Life	(in years)
Client relationships	—		15
Other intangible assets	7		7
Total definite-lived intangible assets	7		12

REVENUE FROM CONTRACTS WITH CUSTOMERS

3 Months Ended

Mar. 30, 2024

Revenue from Contract with Customer [Abstract]

REVENUE FROM CONTRACTS WITH CUSTOMERS

Disaggregation of Revenue

The following table disaggregates the Company’s revenue by major business line and timing of transfer of products or services:


	Three Months Ended
		March 30, 2024		April 1, 2023
		(in thousands)
Timing of Revenue Recognition:
RMS
Services and products transferred over time		$	97,049	$	93,639
Services and products transferred at a point in time		123,858		106,127
Total RMS revenue		220,907		199,766
DSA
Services and products transferred over time		604,125		661,836
Services and products transferred at a point in time		1,327		517
Total DSA revenue		605,452		662,353
Manufacturing
Services and products transferred over time		100,058		86,086
Services and products transferred at a point in time		85,143		81,168
Total Manufacturing revenue		185,201		167,254
Total revenue		$	1,011,560	$	1,029,373

Contract Balances from Contracts with Customers

The following table provides information about client receivables, contract assets, and contract liabilities from contracts with customers:


	March 30, 2024		December 30, 2023
	(in thousands)
Assets from contracts with customers
Client receivables	$	590,594	$	578,077
Unbilled revenue	221,793		228,020
Total	812,387		806,097
Less: Allowance for credit losses	(25,407)		(25,722)
Trade receivables and contract assets, net	$	786,980	$	780,375

Liabilities from contracts with customers
Current deferred revenue	$	256,383	$	241,820
Long-term deferred revenue (included in Other long-term liabilities)	32,448		30,919
Customer contract deposits (included in Other current liabilities)	90,589		85,554

Allowance for Credit Losses

The following is a summary of the activity of the Company’s allowance for credit losses:


	Three Months Ended
	March 30, 2024		April 1, 2023
	(in thousands)
Beginning balance	$	25,722	$	11,278
Additions	934		5,731
Deductions	(1,249)		(315)
Ending balance	$	25,407	$	16,694

Transaction Price Allocated to Future Performance Obligations

Other Performance Obligations

Three Months Ended

March 30, 2024

April 1, 2023

(in thousands)

Affected Line Item in the Unaudited Condensed Consolidated Statements of Income

Lease revenue

20,974

24,090

Service revenue

SEGMENT AND GEOGRAPHIC INFORMATION

3 Months Ended

Mar. 30, 2024

Segment Reporting [Abstract]

SEGMENT AND GEOGRAPHIC INFORMATION


	Three Months Ended
		March 30, 2024		April 1, 2023
		(in thousands)
RMS
Revenue		$	220,907	$	199,766
Cost of revenue (excluding amortization of intangible assets)		140,925		126,804
Selling, general and administrative		30,893		27,058
Amortization of intangible assets		5,940		5,495
Operating income		$	43,149	$	40,409


DSA
Revenue		$	605,452	$	662,353
Cost of revenue (excluding amortization of intangible assets)		417,912		411,523
Selling, general and administrative		56,859		61,998
Amortization of intangible assets		15,842		17,401
Operating income		$	114,839	$	171,431


Manufacturing
Revenue		$	185,201	$	167,254
Cost of revenue (excluding amortization of intangible assets)		107,880		113,392
Selling, general and administrative		32,847		39,736
Amortization of intangible assets		10,793		12,020
Operating income		$	33,681	$	2,106


Unallocated Corporate
Selling, general and administrative		$	(65,692)	$	(46,054)
Operating income (1)		$	(65,692)	$	(46,054)

Consolidated
Revenue		$	1,011,560	$	1,029,373
Cost of revenue (excluding amortization of intangible assets)		666,717		651,719
Selling, general and administrative		186,291		174,846
Amortization of intangible assets		32,575		34,916
Operating income		$	125,977	$	167,892


(1) Operating income for unallocated corporate consists of costs associated with departments such as senior executives, corporate accounting, legal, tax, human resources, treasury, and investor relations.

Capital expenditures and depreciation and amortization (related to both intangible assets and certain assets acquired in business combinations) by reportable segment are as follows:


	RMS		DSA		Manufacturing		Unallocated Corporate		Consolidated
	(in thousands)




Capital Expenditures
Three Months Ended:
March 30, 2024	$	20,044	$	48,959	$	8,862	$	1,279	$	79,144
April 1, 2023	19,084		65,184		21,738		869		106,875

Depreciation and amortization
Three Months Ended:
March 30, 2024	$	18,123	$	45,789	$	19,805	$	1,640	$	85,357
April 1, 2023	13,489		42,450		20,084		1,046		77,069

Revenue by geographic area is as follows:


	U.S.		Europe		Canada		Asia Pacific		Other		Consolidated
	(in thousands)




Three Months Ended:
March 30, 2024	$	562,317	$	276,319	$	110,401	$	45,772	$	16,751	$	1,011,560
April 1, 2023	605,441		267,703		110,606		42,813		2,810		1,029,373

Included in the Other category above are operations located in Brazil, Israel, and Mauritius. Revenue represents sales originating in entities physically located in the identified geographic area.

Long-lived assets by geographic area are as follows:


	U.S.		Europe		Canada		Asia Pacific		Other		Consolidated
	(in thousands)
Long-lived assets
March 30, 2024	$	954,225	$	404,657	$	153,443	$	71,076	$	35,307	$	1,618,708
December 30, 2023	964,176		407,375		157,483		74,605		36,102		1,639,741

Long-lived assets consist of property, plant, and equipment, net.

SUPPLEMENTAL CASH FLOW INFORMATION

3 Months Ended

Mar. 30, 2024

Supplemental Cash Flow Information [Abstract]

SUPPLEMENTAL CASH FLOW INFORMATION


	Three Months Ended
	March 30, 2024		April 1, 2023
	(in thousands)
Cash paid for income taxes	$	18,728	$	13,618
Cash paid for interest	38,258		36,807
Non-cash investing activities:
Purchases of Property, plant and equipment included in Accounts payable and Accrued liabilities	$	23,911	$	43,116
Assets acquired under finance leases	3,159		—

Cash, cash equivalents and restricted cash is included in the accompanying unaudited balance sheet as follows:


	March 30, 2024		December 30, 2023
	(in thousands)
Supplemental cash flow information:
Cash and cash equivalents	$	327,039	$	276,771

Restricted cash included in Other current assets	10,327		5,803
Restricted cash included in Other assets	1,169		1,906
Cash, cash equivalents, and restricted cash, end of period	$	338,535	$	284,480

INVENTORY

3 Months Ended

Mar. 30, 2024

Inventory Disclosure [Abstract]

INVENTORY

Inventories

The composition of inventories is as follows:


	March 30, 2024		December 30, 2023
	(in thousands)
Raw materials and supplies	$	44,603	$	42,296
Work in process	43,252		59,727
Finished products	273,426		278,236
Inventories	$	361,281	$	380,259

PROPERTY, PLANT AND EQUIPMENT, NET

3 Months Ended

Mar. 30, 2024

Property, Plant and Equipment [Abstract]

PROPERTY, PLANT AND EQUIPMENT, NET

The composition of property, plant and equipment, net is as follows:


	March 30, 2024		December 30, 2023
	(in thousands)
Land	$	78,852	$	79,546
Buildings (1)	1,033,150		1,053,915
Machinery and equipment (1)	985,006		984,867
Leasehold improvements	348,558		366,556
Furniture and fixtures	30,712		31,284
Computer hardware and software (1)	254,018		254,413
Vehicles (1)	6,974		6,746
Construction in progress	245,826		197,723
Total	2,983,096		2,975,050
Less: Accumulated depreciation	(1,364,388)		(1,335,309)
Property, plant and equipment, net	$	1,618,708	$	1,639,741

(1) These balances include assets under finance leases.

Depreciation expense in the three months ended March 30, 2024 and April 1, 2023 was $45.7 million and $42.2 million, respectively.

VENTURE CAPITAL AND STRATEGIC EQUITY INVESTMENTS

3 Months Ended

Mar. 30, 2024

Equity Method Investments and Joint Ventures [Abstract]

VENTURE CAPITAL AND STRATEGIC EQUITY INVESTMENTS

Venture capital investments are summarized below:


	Three Months Ended
	March 30, 2024		April 1, 2023
	(in thousands)
Beginning balance	$	121,158	$	129,012
Capital contributions	3,829		3,214
Distributions	(9,353)		(7,217)
Gains (losses)	8,174		(6,848)
Foreign currency translation	(100)		260
Ending balance	$	123,708	$	118,421

The Company also invests, with minority positions, directly in equity of predominantly privately held companies. Strategic investments are summarized below:


	Three Months Ended
	March 30, 2024		April 1, 2023
	(in thousands)
Beginning balance	$	122,653	$	182,590
Purchase of investments	—		9,266
Distributions	—		(4,146)
Gain (loss)	(2,294)		3,566
Reduction for acquisition of entity (1)	—		(12,635)
Foreign currency translation	(524)		(3,275)
Ending balance	$	119,835	$	175,366

(1) Refer to Note 2. Acquisitions for further discussion on the SAMDI acquisition.

FAIR VALUE

3 Months Ended

Mar. 30, 2024

Fair Value Disclosures [Abstract]

FAIR VALUE

Assets and liabilities measured at fair value on a recurring basis are summarized below:


	March 30, 2024
	Level 1		Level 2		Level 3		Total
Current assets measured at fair value:	(in thousands)
Cash equivalents	$	—	$	29	$	—	$	29
Term deposit	—		10,068		—		10,068
Other assets:
Life insurance policies	—		44,617		—		44,617
Interest rate swap	—		1,734		—		1,734
Total assets measured at fair value	$	—	$	56,448	$	—	$	56,448



Other long-term liabilities measured at fair value:
Contingent consideration	$	—	$	—	$	33,265	$	33,265

Total liabilities measured at fair value	$	—	$	—	$	33,265	$	33,265


	December 30, 2023
	Level 1		Level 2		Level 3		Total
Current assets measured at fair value:	(in thousands)
Cash equivalents	$	—	$	29	$	—	$	29
Other assets:
Life insurance policies	—		40,912		—		40,912
Interest rate swap	—		966		—		966
Total assets measured at fair value	$	—	$	41,907	$	—	$	41,907

Other long-term liabilities measured at fair value
Contingent consideration	$	—	$	—	$	33,265	$	33,265

Total liabilities measured at fair value	$	—	$	—	$	33,265	$	33,265

During the year ended December 30, 2023, there were no transfers between levels.

Contingent Consideration

The following table provides a rollforward of the contingent consideration related to the Company’s acquisitions.


	Three Months Ended
	March 30, 2024		April 1, 2023
	(in thousands)
Beginning balance	$	33,265	$	13,431

Payments	—		(2,711)
Total gains or losses (realized/unrealized):

Foreign currency translation	—		(177)
Ending balance	$	33,265	$	10,543

Cash Flow Hedge

Debt Instruments


	March 30, 2024				December 30, 2023
	Book Value		Fair Value		Book Value		Fair Value
	(in thousands)
4.25% Senior Notes due 2028	$	500,000	$	468,750	$	500,000	$	478,100
3.75% Senior Notes due 2029	500,000		453,750		500,000		458,100
4.00% Senior Notes due 2031	500,000		445,000		500,000		449,350

GOODWILL AND INTANGIBLE ASSETS

3 Months Ended

Mar. 30, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL AND INTANGIBLE ASSETS

Goodwill

The following table provides a rollforward of the Company’s goodwill:


	RMS		DSA (1)		Manufacturing		Total
	(in thousands)
December 30, 2023	$	497,474	$	1,662,434	$	935,137	$	3,095,045
Acquisitions	—		497		—		497

Foreign exchange	(407)		(21,340)		(3,554)		(25,301)
March 30, 2024	$	497,067	$	1,641,591	$	931,583	$	3,070,241
(1) DSA includes accumulated impairment losses of $1 billion, which were recognized in fiscal years 2008 and 2010.

The decrease in goodwill during the three months ended March 30, 2024 related to foreign exchange in the DSA and Manufacturing reportable segments.

Intangible Assets, Net

The following table displays intangible assets, net by major class:


	March 30, 2024						December 30, 2023
	Gross		Accumulated Amortization		Net		Gross		Accumulated Amortization		Net
	(in thousands)
Client relationships	$	1,515,021	$	(739,260)	$	775,761	$	1,528,780	$	(721,322)	$	807,458
Technology	140,982		(112,842)		28,140		142,190		(111,764)		30,426
Trademarks and trade names	11,842		(4,822)		7,020		11,878		(4,568)		7,310
Backlog	3,100		(2,485)		615		3,100		(2,177)		923
Other	43,008		(26,906)		16,102		43,611		(25,677)		17,934
Intangible assets	$	1,713,953	$	(886,315)	$	827,638	$	1,729,559	$	(865,508)	$	864,051

The decrease in intangible assets, net during the three months ended March 30, 2024 related to normal amortization over the useful lives.

Amortization expense of definite-lived intangible assets for three months ended March 30, 2024 and April 1, 2023 was $32.6 million and $34.9 million, respectively.

DEBT AND OTHER FINANCING ARRANGEMENTS

3 Months Ended

Mar. 30, 2024

Debt Disclosure [Abstract]

DEBT AND OTHER FINANCING ARRANGEMENTS

Long-term debt, net and finance leases consists of the following:


	March 30, 2024		December 30, 2023
	(in thousands)
Revolving facility	$	1,133,000	$	1,129,243
4.25% Senior Notes due 2028	500,000		500,000
3.75% Senior Notes due 2029	500,000		500,000
4.00% Senior Notes due 2031	500,000		500,000
Other debt	13,516		9,575
Finance leases	30,230		28,550
Total debt and finance leases	2,676,746		2,667,368
Less:
Current portion of long-term debt	459		3,172
Current portion of finance leases	2,169		2,398
Current portion of long-term debt and finance leases	2,628		5,570
Long-term debt and finance leases	2,674,118		2,661,798
Debt discount and debt issuance costs	(13,659)		(14,651)
Long-term debt, net and finance leases	$	2,660,459	$	2,647,147

As of March 30, 2024 and December 30, 2023, the weighted average interest rate on the Company’s debt was 4.97% and 4.93%, respectively.

Letters of Credit

As of March 30, 2024 and December 30, 2023, the Company had $21.2 million and $21.6 million, respectively, in outstanding letters of credit.

EQUITY AND NONCONTROLLING INTERESTS

3 Months Ended

Mar. 30, 2024

Equity [Abstract]

EQUITY AND NONCONTROLLING INTERESTS

Earnings Per Share

The following table reconciles the numerator and denominator in the computations of basic and diluted earnings per share:


	Three Months Ended
		March 30, 2024		April 1, 2023
		(in thousands)
Numerator:
Net income		$	74,482	$	103,954
Less: Net income attributable to noncontrolling interests		1,522		823
Net income available to Charles River Laboratories International, Inc.		72,960		103,131
Less: Adjustment of redeemable noncontrolling interest (1)		401		—
Less: Incremental dividends attributable to noncontrolling interest holders (2)		5,230		—
Net income available to Charles River Laboratories International, Inc. common shareholders		$	67,329	$	103,131

Denominator:
Weighted-average shares outstanding - Basic		51,437		51,097
Effect of dilutive securities:
Stock options, restricted stock units and performance share units		405		331
Weighted-average shares outstanding - Diluted		51,842		51,428

Anti-dilutive common stock equivalents (3)		448		405

(1) Represents adjustments of redeemable noncontrolling interest that impact retained earnings.
(2) Represents incremental undeclared dividends attributable to Noveprim noncontrolling interest holders who are entitled to preferential dividends for fiscal year 2024.
(3) These common stock equivalents were outstanding for the periods presented, but were not included in the computation of diluted EPS for those periods because their inclusion would have had an anti-dilutive effect.

Treasury Shares

The Company’s Board of Directors has authorized a $1.3 billion stock repurchase program. As of March 30, 2024, the Company had $129.1 million remaining on the authorized stock repurchase program.

Accumulated Other Comprehensive Income (Loss)

Changes to each component of accumulated other comprehensive income (loss), net of income taxes, are as follows:


	Foreign Currency Translation Adjustment and Other		Pension and Other Post-Retirement Benefit Plans		Net Unrealized (Loss) Gain on Cash Flow Hedge		Total
	(in thousands)
December 30, 2023	$	(149,999)	$	(47,167)	$	739	$	(196,427)
Other comprehensive income (loss) before reclassifications	(60,077)		344		768		(58,965)

Net current period other comprehensive income (loss)	(60,077)		344		768		(58,965)
Income tax expense (benefit)	(5,737)		80		184		(5,473)
March 30, 2024	$	(204,339)	$	(46,903)	$	1,323	$	(249,919)

Redeemable Noncontrolling Interests

Noveprim

Other redeemable noncontrolling interest

Vital River

Nonredeemable Noncontrolling Interest

INCOME TAXES

3 Months Ended

Mar. 30, 2024

Income Tax Disclosure [Abstract]

INCOME TAXES

The Company’s prepaid and accrued tax positions are as follows:


	March 30, 2024		December 30, 2023		Affected Line Item in the Unaudited Condensed Consolidated Balance Sheets
	(in thousands)
Prepaid income tax	$	60,311	$	59,715	Other current assets
Accrued income taxes	34,102		38,819		Other current liabilities

RESTRUCTURING AND ASSET IMPAIRMENTS

3 Months Ended

Mar. 30, 2024

Restructuring and Related Activities [Abstract]

RESTRUCTURING AND ASSET IMPAIRMENTS

The following table presents restructuring costs by reportable segment:


	Three Months Ended
		March 30, 2024		April 1, 2023
		(in thousands)
RMS		$	7,387	$	—
DSA		6,491		(2)
Manufacturing		1,631		3,488
Unallocated corporate		1,490		—
Total		$	16,999	$	3,486

The following table presents restructuring costs as included within the Company’s unaudited condensed consolidated statements of income:


	March 30, 2024						April 1, 2023
	Severance and Transition Costs		Asset Impairments and Other Costs		Total		Severance and Transition Costs		Asset Impairments and Other Costs		Total
	(in thousands)






Three Months Ended
Cost of services provided (excluding amortization of intangible assets)	$	4,810	$	1,108	$	5,918	$	567	$	—	$	567
Cost of products sold (excluding amortization of intangible assets)	678		1,330		2,008		18		2,564		2,582
Selling, general and administrative	3,549		5,524		9,073		329		8		337
Total restructuring costs	$	9,037	$	7,962	$	16,999	$	914	$	2,572	$	3,486

Rollforward of Restructuring Activities

The following table provides a rollforward for all of the Company’s severance and transition costs related to all restructuring activities:


	Three Months Ended
	March 30, 2024		April 1, 2023
	(in thousands)
Beginning balance	$	5,050	$	1,300
Expense (excluding non-cash charges)	9,037		914
Payments / utilization	(3,235)		(331)

Foreign currency adjustments	(40)		6
Ending balance	$	10,812	$	1,889

COMMITMENTS AND CONTINGENCIES	3 Months Ended
COMMITMENTS AND CONTINGENCIES	Mar. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Litigation On February 16, 2023, the Company was informed by the U.S. Department of Justice (DOJ) that in conjunction with the U.S. Fish and Wildlife Service (USFWS), it had commenced an investigation into the Company’s conduct regarding several shipments of non-human primates from Cambodia. On February 17, 2023 the Company received a grand jury subpoena requesting certain documents related to such investigation. The Company is aware of a parallel civil investigation being undertaken by the DOJ and USFWS. The Company is cooperating with the DOJ and the USFWS and believes that the concerns raised with respect to the Company’s conduct are without merit. The Company maintains a global supplier onboarding and oversight program incorporating risk-based due diligence, auditing, and monitoring practices to help ensure the quality of our supplier relationships and compliance with applicable U.S. and international laws and regulations, and has operated under the belief that all shipments of non-human primates it received satisfied the material requirements, documentation and related processes and procedures of the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) documentation and related processes and procedures, which guides the release of each import by USFWS. Notwithstanding our efforts and good-faith belief, in connection with the civil investigation, the Company has voluntarily suspended future shipments of non-human primates from Cambodia to the United States until such time that the Company and USFWS can agree upon and implement additional procedures to reasonably ensure that non-human primates imported from Cambodia are purpose-bred. The Company continues to care for the Cambodia-sourced non-human primates from certain shipments in the United States. The carrying value of the inventory related to these shipments was approximately $27 million as of March 30, 2024, which reflects the value of the shipments in accordance with the Company’s inventory accounting policy. On May 16, 2023, the Company received an inquiry from the Enforcement Division of the U.S. Securities and Exchange Commission (SEC) requesting it to voluntarily provide information, subsequently augmented with a document subpoena, primarily related to the sourcing of non-human primates, and the Company is cooperating with the request. The Company is not able to predict what action, if any, might be taken in the future by the DOJ, USFWS, SEC or other governmental authorities as a result of the investigations. None of the DOJ, USFWS or SEC has provided the Company with any specific timeline or indication as to when these investigations or, specific to the DOJ and USFWS, discussions regarding future processes and procedures, will be concluded or resolved. The Company cannot predict the timing, outcome or possible impact of the investigations, including without limitation any potential fines, penalties or liabilities. A putative securities class action (Securities Class Action) was filed on May 19, 2023 against the Company and a number of its current/former officers in the United States District Court for the District of Massachusetts. On August 31, 2023, the court appointed the State Teachers Retirement System of Ohio as lead plaintiff. An amended complaint was filed on November 14, 2023 that, among other things, included only James Foster, the Chief Executive Officer and David R. Smith, the former Chief Financial Officer as defendants along with the Company. The amended complaint asserts claims under §§ 10(b) and 20(a) of the Securities Exchange Act of 1934 (the "Exchange Act") on behalf of a putative class of purchasers of Company securities from May 5, 2020 through February 21, 2023, alleging that certain of the Company’s disclosures about its practices with respect to the importation of non-human primates made during the putative class period were materially false or misleading. The Company filed a motion to dismiss. While the Company cannot predict the outcome of this matter, it believes the class action to be without merit and plans to vigorously defend against it. The Company cannot reasonably estimate the maximum potential exposure or the range of possible loss in association with this matter. On November 8, 2023, a stockholder filed a derivative lawsuit in the U.S. District Court of the District of Delaware asserting claims on the Company’s behalf against the members of the Company’s Board of Directors and certain of the Company’s current/former officers (James Foster, the Chief Executive Officer; David R. Smith, the former Chief Financial Officer; and Flavia Pease, the current Chief Financial Officer). The complaint alleges that the defendants breached their fiduciary duties to the Company and its stockholders because certain of the Company’s disclosures about its practices with respect to the importation of non-human primates were materially false or misleading. The complaint also alleges that the defendants breached their fiduciary duties by causing the Company to fail to maintain adequate internal controls over securities disclosure and compliance with applicable law and by failing to comply with the company’s Code of Business Conduct and Ethics. In March 2024, the plaintiff agreed to stay the action until the United States District Court for the District of Massachusetts rules on the pending motion to dismiss in the Securities Class Action. The Company intends to file a motion to dismiss at that time. While the Company cannot predict the outcome of this matter, it believes the derivative lawsuit to be without merit and plans to vigorously defend against it. The Company cannot reasonably estimate the maximum potential exposure or the range of possible loss in association with this matter. Aside from the matters above, the Company believes there are no other matters pending against the Company that could have a material impact on the Company’s business, financial condition, or results of operations.

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Mar. 30, 2024	Apr. 01, 2023
Pay vs Performance Disclosure
Net income available to Charles River Laboratories International, Inc.	$ 72,960	$ 103,131

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Mar. 30, 2024 shares
Trading Arrangements, by Individual
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false
James Foster [Member]
Trading Arrangements, by Individual
Material Terms of Trading Arrangement	On February 26, 2024, James Foster, our Chair, President, and Chief Executive Officer, entered into a Rule 10b5-1 trading arrangement for the sale of up to 129,721 shares of common stock. The arrangement’s expiration date is June 30, 2026.
Name	James Foster
Title	Chair, President, and Chief Executive Officer
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	February 26, 2024
Aggregate Available	129,721
Shannon Parisotto [Member]
Trading Arrangements, by Individual
Material Terms of Trading Arrangement	On March 4, 2024, Shannon Parisotto, our Corporate Executive Vice President, Global Discovery & Safety Assessment entered into a Rule 10b5-1 trading arrangement for the sale of up to 10,170 shares of common stock, subject to certain conditions. The arrangement’s expiration date is February 28, 2025.
Name	Shannon Parisotto
Title	Corporate Executive Vice President
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	March 4, 2024
Aggregate Available	10,170

BASIS OF PRESENTATION (Policies)	3 Months Ended
BASIS OF PRESENTATION (Policies)	Mar. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	The accompanying condensed consolidated financial statements are unaudited and have been prepared by Charles River Laboratories International, Inc. (the Company) in accordance with accounting principles generally accepted in the United States (U.S. GAAP) and pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). The year-end condensed consolidated balance sheet data was derived from the Company’s audited consolidated financial statements, but does not include all disclosures required by U.S. GAAP. These unaudited condensed consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for fiscal year 2023. Certain reclassifications of prior year amounts have been made to conform to the current year presentation. The unaudited condensed consolidated financial statements, in the opinion of management, reflect all normal and recurring adjustments necessary for a fair statement of the Company’s financial position and results of operations.
Use of Estimates	Use of Estimates The preparation of unaudited condensed consolidated financial statements in accordance with U.S. GAAP requires that the Company make estimates and judgments that may affect the reported amounts of assets, liabilities, revenues, expenses and related disclosure of contingent assets and liabilities. On an on-going basis, the Company evaluates its estimates, judgments, and methodologies. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Actual results may differ from these estimates under different assumptions or conditions. Changes in estimates are reflected in reported results in the period in which they become known.
Newly Issued Accounting Pronouncements	Newly Issued Accounting Pronouncements In November 2023, the FASB issued ASU 2023-07, “Improvements to Reportable Segment Disclosures (Topic 280)”. ASU 2023-07 modifies reportable segment disclosure requirements, primarily through enhanced disclosures about segment expenses categorized as significant or regularly provided to the Chief Operating Decision Maker (CODM). In addition, the amendments enhance interim disclosure requirements, clarify circumstances in which an entity can disclose multiple segment measures of profit or loss, and contain other disclosure requirements. The purpose of the amendments is to enable investors to better understand an entity’s overall performance and assess potential future cash flows. This ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted and the amendments in this update are required to be applied on a retrospective basis. The Company is currently evaluating the impact this new standard will have on the related disclosures in the annual consolidated financial statements, but does not believe there will be a material impact. In December 2023, the FASB issued ASU 2023-09, “Improvements to Income Tax Disclosures (Topic 740)”. ASU 2023-09 requires enhanced disclosures on income taxes paid, adds disaggregation of continuing operations before income taxes between foreign and domestic earnings and defines specific categories for the reconciliation of jurisdictional tax rate to effective tax rate. This ASU is effective for fiscal years beginning after December 15, 2024, and can be applied on a prospective basis. The Company is currently evaluating the impact this new standard will have on the related disclosures on the consolidated financial statements.
Consolidation	Consolidation The Company’s unaudited condensed consolidated financial statements reflect its financial statements and those of its subsidiaries in which the Company holds a controlling financial interest. For consolidated entities in which the Company owns or is exposed to less than 100% of the economics, the Company records net income (loss) attributable to noncontrolling interests in its unaudited condensed consolidated statements of income equal to the percentage of the economic or ownership interest retained in such entities by the respective noncontrolling parties. Redeemable noncontrolling interests, where the noncontrolling interest holders have the ability to require the Company to purchase the remaining interests, are classified in the mezzanine section of the unaudited condensed consolidated balance sheets, which is presented above the equity section and below liabilities. Intercompany balances and transactions are eliminated in consolidation. The Company’s fiscal year is typically based on 52-weeks, with each quarter composed of 13 weeks ending on the last Saturday on, or closest to, March 31, June 30, September 30, and December 31. A 53rd week in the fourth quarter of the fiscal year is occasionally necessary to align with a December 31 calendar year-end.
Segment Reporting	Segment Reporting The Company reports its results in three reportable segments: Research Models and Services (RMS), Discovery and Safety Assessment (DSA), and Manufacturing Solutions (Manufacturing). The Company’s RMS reportable segment includes the Research Models, Research Model Services, and Cell Solutions businesses. Research Models includes the commercial production and sale of small research models, as well as the supply of large research models. Research Model Services includes: Insourcing Solutions (IS), which provides colony management of clients’ research operations (including recruitment, training, staffing, and management services) within the clients’ facilities and utilizing the Charles River Accelerator and Development Lab (CRADL™) offering, which provides vivarium space to clients, Genetically Engineered Models and Services (GEMS), which performs contract breeding and other services associated with genetically engineered models, and Research Animal Diagnostic Services (RADS), which provides health monitoring and diagnostics services related to research models; and Cell Solutions, which supplies controlled, consistent, customized primary cells and blood components derived from normal and mobilized peripheral blood and bone marrow. The Company’s DSA reportable segment includes two businesses: Discovery Services and Safety Assessment. The Company provides regulated and non-regulated DSA services to support the research, development, and regulatory-required safety testing of potential new drugs, including therapeutic discovery and optimization plus in vitro and in vivo studies, laboratory support services, and strategic non-clinical consulting and program management to support product development. The Company’s Manufacturing reportable segment includes Microbial Solutions, which provides in vitro (non-animal) lot-release testing products, microbial detection products, and species identification services and Biologics Solutions (Biologics), which performs specialized testing of biologics (Biologics Testing Solutions) as well as contract development and manufacturing products and services (CDMO).

ACQUISITIONS AND DIVESTITURES (Tables)

3 Months Ended

Mar. 30, 2024

Business Combination and Asset Acquisition [Abstract]

Schedule of Purchase Price Allocation and Transaction and Integration Costs

The purchase price allocation was as follows:


	Noveprim Group(1)		SAMDI Tech, Inc.
	November 30, 2023		January 27, 2023
	(in thousands)
Trade receivables	$	1,308	$	513
Inventories	66,500		—
Other current assets (excluding cash)	3,467		75
Property, plant and equipment	35,831		593
Operating lease right-of-use asset, net	104		—
Goodwill (2)	172,846		37,129
Definite-lived intangible assets	9,500		33,070
Other long-term assets (3)	167,907		6
Deferred revenue	—		(43)
Other current liabilities	(16,378)		(351)
Operating lease right-of-use liabilities (Long-term)	(97)		—
Deferred tax liabilities	(12,984)		(8,191)
Other long-term liabilities	(7,796)		—
Redeemable noncontrolling interest (4)	(45,374)		—
Total purchase price allocation	$	374,834	$	62,801

(1) Purchase price allocation is preliminary and subject to change as additional information becomes available concerning the fair value and tax basis of the assets acquired and liabilities assumed, including certain contracts, obligations, and finalization of any working capital adjustments. Any additional adjustments to the purchase price allocation will be made as soon as practicable but no later than one year from the date of acquisition.
(2) The goodwill resulting from these transactions is primarily attributable to the potential growth of the Company’s segments from new customers introduced to the acquired businesses or synergies to be realized from acquiring an internal supplier servicing the DSA business and the assembled workforce of the acquirees, thus is not deductible for tax purposes.
(3) Other long-term assets acquired from the Noveprim acquisition include $167.8 million of biological assets, which will be amortized over an estimated eight-year useful life.
(4) Refer to Note 12. Equity and Noncontrolling Interests for further a description of the 10% noncontrolling interest fair value.

Schedule of Definite-Lived Intangible Assets Acquired as Part of Business Combination

The definite-lived intangible assets acquired were as follows:


	Noveprim Group		SAMDI Tech, Inc.
Definite-Lived Intangible Assets	(in thousands)
Client relationships	$	—	$	23,400
Other intangible assets	9,500		9,670
Total definite-lived intangible assets	$	9,500	$	33,070

Weighted Average Amortization Life	(in years)
Client relationships	—		15
Other intangible assets	7		7
Total definite-lived intangible assets	7		12

REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables)

3 Months Ended

Mar. 30, 2024

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

The following table disaggregates the Company’s revenue by major business line and timing of transfer of products or services:


	Three Months Ended
		March 30, 2024		April 1, 2023
		(in thousands)
Timing of Revenue Recognition:
RMS
Services and products transferred over time		$	97,049	$	93,639
Services and products transferred at a point in time		123,858		106,127
Total RMS revenue		220,907		199,766
DSA
Services and products transferred over time		604,125		661,836
Services and products transferred at a point in time		1,327		517
Total DSA revenue		605,452		662,353
Manufacturing
Services and products transferred over time		100,058		86,086
Services and products transferred at a point in time		85,143		81,168
Total Manufacturing revenue		185,201		167,254
Total revenue		$	1,011,560	$	1,029,373

Revenue by geographic area is as follows:


	U.S.		Europe		Canada		Asia Pacific		Other		Consolidated
	(in thousands)




Three Months Ended:
March 30, 2024	$	562,317	$	276,319	$	110,401	$	45,772	$	16,751	$	1,011,560
April 1, 2023	605,441		267,703		110,606		42,813		2,810		1,029,373

Schedule of Client Receivables, Contract Assets and Contract Liabilities

The following table provides information about client receivables, contract assets, and contract liabilities from contracts with customers:


	March 30, 2024		December 30, 2023
	(in thousands)
Assets from contracts with customers
Client receivables	$	590,594	$	578,077
Unbilled revenue	221,793		228,020
Total	812,387		806,097
Less: Allowance for credit losses	(25,407)		(25,722)
Trade receivables and contract assets, net	$	786,980	$	780,375

Liabilities from contracts with customers
Current deferred revenue	$	256,383	$	241,820
Long-term deferred revenue (included in Other long-term liabilities)	32,448		30,919
Customer contract deposits (included in Other current liabilities)	90,589		85,554

The associated revenue is recognized on a straight-line basis over the term of the lease, which is generally less than one year.

Three Months Ended

March 30, 2024

April 1, 2023

(in thousands)

Affected Line Item in the Unaudited Condensed Consolidated Statements of Income

Lease revenue

20,974

24,090

Service revenue

Schedule of Allowance for Credit Losses

The following is a summary of the activity of the Company’s allowance for credit losses:


	Three Months Ended
	March 30, 2024		April 1, 2023
	(in thousands)
Beginning balance	$	25,722	$	11,278
Additions	934		5,731
Deductions	(1,249)		(315)
Ending balance	$	25,407	$	16,694

SEGMENT AND GEOGRAPHIC INFORMATION (Tables)

3 Months Ended

Mar. 30, 2024

Segment Reporting [Abstract]

Schedule of Revenue and Other Financial Information by Business Segment

The following table presents the results of operations by reportable segment:


	Three Months Ended
		March 30, 2024		April 1, 2023
		(in thousands)
RMS
Revenue		$	220,907	$	199,766
Cost of revenue (excluding amortization of intangible assets)		140,925		126,804
Selling, general and administrative		30,893		27,058
Amortization of intangible assets		5,940		5,495
Operating income		$	43,149	$	40,409


DSA
Revenue		$	605,452	$	662,353
Cost of revenue (excluding amortization of intangible assets)		417,912		411,523
Selling, general and administrative		56,859		61,998
Amortization of intangible assets		15,842		17,401
Operating income		$	114,839	$	171,431


Manufacturing
Revenue		$	185,201	$	167,254
Cost of revenue (excluding amortization of intangible assets)		107,880		113,392
Selling, general and administrative		32,847		39,736
Amortization of intangible assets		10,793		12,020
Operating income		$	33,681	$	2,106


Unallocated Corporate
Selling, general and administrative		$	(65,692)	$	(46,054)
Operating income (1)		$	(65,692)	$	(46,054)

Consolidated
Revenue		$	1,011,560	$	1,029,373
Cost of revenue (excluding amortization of intangible assets)		666,717		651,719
Selling, general and administrative		186,291		174,846
Amortization of intangible assets		32,575		34,916
Operating income		$	125,977	$	167,892


(1) Operating income for unallocated corporate consists of costs associated with departments such as senior executives, corporate accounting, legal, tax, human resources, treasury, and investor relations.

Capital expenditures and depreciation and amortization (related to both intangible assets and certain assets acquired in business combinations) by reportable segment are as follows:


	RMS		DSA		Manufacturing		Unallocated Corporate		Consolidated
	(in thousands)




Capital Expenditures
Three Months Ended:
March 30, 2024	$	20,044	$	48,959	$	8,862	$	1,279	$	79,144
April 1, 2023	19,084		65,184		21,738		869		106,875

Depreciation and amortization
Three Months Ended:
March 30, 2024	$	18,123	$	45,789	$	19,805	$	1,640	$	85,357
April 1, 2023	13,489		42,450		20,084		1,046		77,069

Revenue by Geographic Area

The following table disaggregates the Company’s revenue by major business line and timing of transfer of products or services:


	Three Months Ended
		March 30, 2024		April 1, 2023
		(in thousands)
Timing of Revenue Recognition:
RMS
Services and products transferred over time		$	97,049	$	93,639
Services and products transferred at a point in time		123,858		106,127
Total RMS revenue		220,907		199,766
DSA
Services and products transferred over time		604,125		661,836
Services and products transferred at a point in time		1,327		517
Total DSA revenue		605,452		662,353
Manufacturing
Services and products transferred over time		100,058		86,086
Services and products transferred at a point in time		85,143		81,168
Total Manufacturing revenue		185,201		167,254
Total revenue		$	1,011,560	$	1,029,373

Revenue by geographic area is as follows:


	U.S.		Europe		Canada		Asia Pacific		Other		Consolidated
	(in thousands)




Three Months Ended:
March 30, 2024	$	562,317	$	276,319	$	110,401	$	45,772	$	16,751	$	1,011,560
April 1, 2023	605,441		267,703		110,606		42,813		2,810		1,029,373

Long-Lived Assets by Geographic Area

Long-lived assets by geographic area are as follows:


	U.S.		Europe		Canada		Asia Pacific		Other		Consolidated
	(in thousands)
Long-lived assets
March 30, 2024	$	954,225	$	404,657	$	153,443	$	71,076	$	35,307	$	1,618,708
December 30, 2023	964,176		407,375		157,483		74,605		36,102		1,639,741

SUPPLEMENTAL CASH FLOW INFORMATION (Tables)

3 Months Ended

Mar. 30, 2024

Supplemental Cash Flow Information [Abstract]

Schedule of Supplemental Cash Flow Information


	Three Months Ended
	March 30, 2024		April 1, 2023
	(in thousands)
Cash paid for income taxes	$	18,728	$	13,618
Cash paid for interest	38,258		36,807
Non-cash investing activities:
Purchases of Property, plant and equipment included in Accounts payable and Accrued liabilities	$	23,911	$	43,116
Assets acquired under finance leases	3,159		—

Cash, cash equivalents and restricted cash is included in the accompanying unaudited balance sheet as follows:


	March 30, 2024		December 30, 2023
	(in thousands)
Supplemental cash flow information:
Cash and cash equivalents	$	327,039	$	276,771

Restricted cash included in Other current assets	10,327		5,803
Restricted cash included in Other assets	1,169		1,906
Cash, cash equivalents, and restricted cash, end of period	$	338,535	$	284,480

INVENTORY (Tables)

3 Months Ended

Mar. 30, 2024

Inventory Disclosure [Abstract]

Composition of Inventories

The composition of inventories is as follows:


	March 30, 2024		December 30, 2023
	(in thousands)
Raw materials and supplies	$	44,603	$	42,296
Work in process	43,252		59,727
Finished products	273,426		278,236
Inventories	$	361,281	$	380,259

PROPERTY, PLANT AND EQUIPMENT, NET (Tables)

3 Months Ended

Mar. 30, 2024

Property, Plant and Equipment [Abstract]

Schedule of Composition of Property, Plant and Equipment, Net

The composition of property, plant and equipment, net is as follows:


	March 30, 2024		December 30, 2023
	(in thousands)
Land	$	78,852	$	79,546
Buildings (1)	1,033,150		1,053,915
Machinery and equipment (1)	985,006		984,867
Leasehold improvements	348,558		366,556
Furniture and fixtures	30,712		31,284
Computer hardware and software (1)	254,018		254,413
Vehicles (1)	6,974		6,746
Construction in progress	245,826		197,723
Total	2,983,096		2,975,050
Less: Accumulated depreciation	(1,364,388)		(1,335,309)
Property, plant and equipment, net	$	1,618,708	$	1,639,741

(1) These balances include assets under finance leases.

VENTURE CAPITAL AND STRATEGIC EQUITY INVESTMENTS - (Tables)

3 Months Ended

Mar. 30, 2024

Equity Method Investments and Joint Ventures [Abstract]

Schedule of Equity Method Investments

Venture capital investments are summarized below:


	Three Months Ended
	March 30, 2024		April 1, 2023
	(in thousands)
Beginning balance	$	121,158	$	129,012
Capital contributions	3,829		3,214
Distributions	(9,353)		(7,217)
Gains (losses)	8,174		(6,848)
Foreign currency translation	(100)		260
Ending balance	$	123,708	$	118,421

The Company also invests, with minority positions, directly in equity of predominantly privately held companies. Strategic investments are summarized below:


	Three Months Ended
	March 30, 2024		April 1, 2023
	(in thousands)
Beginning balance	$	122,653	$	182,590
Purchase of investments	—		9,266
Distributions	—		(4,146)
Gain (loss)	(2,294)		3,566
Reduction for acquisition of entity (1)	—		(12,635)
Foreign currency translation	(524)		(3,275)
Ending balance	$	119,835	$	175,366

(1) Refer to Note 2. Acquisitions for further discussion on the SAMDI acquisition.

FAIR VALUE (Tables)

3 Months Ended

Mar. 30, 2024

Fair Value Disclosures [Abstract]

Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis

Assets and liabilities measured at fair value on a recurring basis are summarized below:


	March 30, 2024
	Level 1		Level 2		Level 3		Total
Current assets measured at fair value:	(in thousands)
Cash equivalents	$	—	$	29	$	—	$	29
Term deposit	—		10,068		—		10,068
Other assets:
Life insurance policies	—		44,617		—		44,617
Interest rate swap	—		1,734		—		1,734
Total assets measured at fair value	$	—	$	56,448	$	—	$	56,448



Other long-term liabilities measured at fair value:
Contingent consideration	$	—	$	—	$	33,265	$	33,265

Total liabilities measured at fair value	$	—	$	—	$	33,265	$	33,265


	December 30, 2023
	Level 1		Level 2		Level 3		Total
Current assets measured at fair value:	(in thousands)
Cash equivalents	$	—	$	29	$	—	$	29
Other assets:
Life insurance policies	—		40,912		—		40,912
Interest rate swap	—		966		—		966
Total assets measured at fair value	$	—	$	41,907	$	—	$	41,907

Other long-term liabilities measured at fair value
Contingent consideration	$	—	$	—	$	33,265	$	33,265

Total liabilities measured at fair value	$	—	$	—	$	33,265	$	33,265

During the year ended December 30, 2023, there were no transfers between levels.

The book value and fair value of the Company’s Senior Notes is summarized below:


	March 30, 2024				December 30, 2023
	Book Value		Fair Value		Book Value		Fair Value
	(in thousands)
4.25% Senior Notes due 2028	$	500,000	$	468,750	$	500,000	$	478,100
3.75% Senior Notes due 2029	500,000		453,750		500,000		458,100
4.00% Senior Notes due 2031	500,000		445,000		500,000		449,350

Rollforward of Contingent Consideration Related to Previous Acquisitions

The following table provides a rollforward of the contingent consideration related to the Company’s acquisitions.


	Three Months Ended
	March 30, 2024		April 1, 2023
	(in thousands)
Beginning balance	$	33,265	$	13,431

Payments	—		(2,711)
Total gains or losses (realized/unrealized):

Foreign currency translation	—		(177)
Ending balance	$	33,265	$	10,543

GOODWILL AND INTANGIBLE ASSETS (Tables)

3 Months Ended

Mar. 30, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table provides a rollforward of the Company’s goodwill:


	RMS		DSA (1)		Manufacturing		Total
	(in thousands)
December 30, 2023	$	497,474	$	1,662,434	$	935,137	$	3,095,045
Acquisitions	—		497		—		497

Foreign exchange	(407)		(21,340)		(3,554)		(25,301)
March 30, 2024	$	497,067	$	1,641,591	$	931,583	$	3,070,241
(1) DSA includes accumulated impairment losses of $1 billion, which were recognized in fiscal years 2008 and 2010.

Schedule of Intangible Assets

The following table displays intangible assets, net by major class:


	March 30, 2024						December 30, 2023
	Gross		Accumulated Amortization		Net		Gross		Accumulated Amortization		Net
	(in thousands)
Client relationships	$	1,515,021	$	(739,260)	$	775,761	$	1,528,780	$	(721,322)	$	807,458
Technology	140,982		(112,842)		28,140		142,190		(111,764)		30,426
Trademarks and trade names	11,842		(4,822)		7,020		11,878		(4,568)		7,310
Backlog	3,100		(2,485)		615		3,100		(2,177)		923
Other	43,008		(26,906)		16,102		43,611		(25,677)		17,934
Intangible assets	$	1,713,953	$	(886,315)	$	827,638	$	1,729,559	$	(865,508)	$	864,051

DEBT AND OTHER FINANCING ARRANGEMENTS (Tables)

3 Months Ended

Mar. 30, 2024

Debt Disclosure [Abstract]

Schedule of Long-term Debt and Finance Lease Obligations

Long-term debt, net and finance leases consists of the following:


	March 30, 2024		December 30, 2023
	(in thousands)
Revolving facility	$	1,133,000	$	1,129,243
4.25% Senior Notes due 2028	500,000		500,000
3.75% Senior Notes due 2029	500,000		500,000
4.00% Senior Notes due 2031	500,000		500,000
Other debt	13,516		9,575
Finance leases	30,230		28,550
Total debt and finance leases	2,676,746		2,667,368
Less:
Current portion of long-term debt	459		3,172
Current portion of finance leases	2,169		2,398
Current portion of long-term debt and finance leases	2,628		5,570
Long-term debt and finance leases	2,674,118		2,661,798
Debt discount and debt issuance costs	(13,659)		(14,651)
Long-term debt, net and finance leases	$	2,660,459	$	2,647,147

EQUITY AND NONCONTROLLING INTERESTS (Tables)

3 Months Ended

Mar. 30, 2024

Equity [Abstract]

Reconciliation of the Numerator and Denominator in the Computations of the Basic and Diluted Earnings Per Share

The following table reconciles the numerator and denominator in the computations of basic and diluted earnings per share:


	Three Months Ended
		March 30, 2024		April 1, 2023
		(in thousands)
Numerator:
Net income		$	74,482	$	103,954
Less: Net income attributable to noncontrolling interests		1,522		823
Net income available to Charles River Laboratories International, Inc.		72,960		103,131
Less: Adjustment of redeemable noncontrolling interest (1)		401		—
Less: Incremental dividends attributable to noncontrolling interest holders (2)		5,230		—
Net income available to Charles River Laboratories International, Inc. common shareholders		$	67,329	$	103,131

Denominator:
Weighted-average shares outstanding - Basic		51,437		51,097
Effect of dilutive securities:
Stock options, restricted stock units and performance share units		405		331
Weighted-average shares outstanding - Diluted		51,842		51,428

Anti-dilutive common stock equivalents (3)		448		405

(1) Represents adjustments of redeemable noncontrolling interest that impact retained earnings.
(2) Represents incremental undeclared dividends attributable to Noveprim noncontrolling interest holders who are entitled to preferential dividends for fiscal year 2024.
(3) These common stock equivalents were outstanding for the periods presented, but were not included in the computation of diluted EPS for those periods because their inclusion would have had an anti-dilutive effect.

Schedule of Accumulated Other Comprehensive Income (Loss)

Changes to each component of accumulated other comprehensive income (loss), net of income taxes, are as follows:


	Foreign Currency Translation Adjustment and Other		Pension and Other Post-Retirement Benefit Plans		Net Unrealized (Loss) Gain on Cash Flow Hedge		Total
	(in thousands)
December 30, 2023	$	(149,999)	$	(47,167)	$	739	$	(196,427)
Other comprehensive income (loss) before reclassifications	(60,077)		344		768		(58,965)

Net current period other comprehensive income (loss)	(60,077)		344		768		(58,965)
Income tax expense (benefit)	(5,737)		80		184		(5,473)
March 30, 2024	$	(204,339)	$	(46,903)	$	1,323	$	(249,919)

INCOME TAXES (Tables)

3 Months Ended

Mar. 30, 2024

Income Tax Disclosure [Abstract]

Schedule of Prepaid and Accrued Tax Positions

The Company’s prepaid and accrued tax positions are as follows:


	March 30, 2024		December 30, 2023		Affected Line Item in the Unaudited Condensed Consolidated Balance Sheets
	(in thousands)
Prepaid income tax	$	60,311	$	59,715	Other current assets
Accrued income taxes	34,102		38,819		Other current liabilities

RESTRUCTURING AND ASSET IMPAIRMENTS (Tables)

3 Months Ended

Mar. 30, 2024

Restructuring and Related Activities [Abstract]

Schedule of Restructuring Costs

The following table presents restructuring costs by reportable segment:


	Three Months Ended
		March 30, 2024		April 1, 2023
		(in thousands)
RMS		$	7,387	$	—
DSA		6,491		(2)
Manufacturing		1,631		3,488
Unallocated corporate		1,490		—
Total		$	16,999	$	3,486

The following table presents restructuring costs as included within the Company’s unaudited condensed consolidated statements of income:


	March 30, 2024						April 1, 2023
	Severance and Transition Costs		Asset Impairments and Other Costs		Total		Severance and Transition Costs		Asset Impairments and Other Costs		Total
	(in thousands)






Three Months Ended
Cost of services provided (excluding amortization of intangible assets)	$	4,810	$	1,108	$	5,918	$	567	$	—	$	567
Cost of products sold (excluding amortization of intangible assets)	678		1,330		2,008		18		2,564		2,582
Selling, general and administrative	3,549		5,524		9,073		329		8		337
Total restructuring costs	$	9,037	$	7,962	$	16,999	$	914	$	2,572	$	3,486

Schedule of Rollforward of Company's Severance and Retention Costs Liability

The following table provides a rollforward for all of the Company’s severance and transition costs related to all restructuring activities:


	Three Months Ended
	March 30, 2024		April 1, 2023
	(in thousands)
Beginning balance	$	5,050	$	1,300
Expense (excluding non-cash charges)	9,037		914
Payments / utilization	(3,235)		(331)

Foreign currency adjustments	(40)		6
Ending balance	$	10,812	$	1,889

BASIS OF PRESENTATION (Details)	3 Months Ended
BASIS OF PRESENTATION (Details)	Mar. 30, 2024 segment subsegment
Number of reportable segments \| segment	3
Discover And Safety Assessment Segment
Number of businesses in reportable segment \| subsegment	2

ACQUISITIONS AND DIVESTITURES - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended	23 Months Ended
	Jan. 27, 2023	Mar. 30, 2024	Apr. 01, 2023	Dec. 31, 2022	Nov. 30, 2023
Business Acquisition [Line Items]
Transaction and integration costs		$ 200	$ 800
Cash portion of consideration transferred		$ 0	$ 50,166
Noveprim Group
Business Acquisition [Line Items]
Percentage of voting interests acquired					41.00%
Equity interest acquired					90.00%
Business combination, equity stake percentage				49.00%
Purchases of additional equity interests, net				$ 90,000
Contingent liability				$ 5,000
Purchase price					$ 374,800
Additional cash paid					144,600
Business combination, consideration transferred, other					198,800
Gain in equity equal to the excess fair value of additional equity interest purchased					103,200
Contingent consideration					33,300
Business combination deferred purchase price					12,000
Adjustments for working capital/debt					13,800
Consideration contingent upon future performance					$ 55,000
Business combination, remaining equity to purchase					10.00%
Call option term, period after sixth anniversary					1 month
Put option term, period after first anniversary					12 months
Noveprim Group \| Minimum
Business Acquisition [Line Items]
Business combination, redemption price					$ 47,000
Noveprim Group \| Maximum
Business Acquisition [Line Items]
Business combination, redemption price					$ 54,000
SAMDI Tech, Inc.
Business Acquisition [Line Items]
Business combination, equity stake percentage	20.00%
Cash portion of consideration transferred	$ 62,800
Cash acquired	400
Value of previously owned interest in acquiree	$ 12,600

ACQUISITIONS AND DIVESTITURES - Purchase Price Allocation (Details) - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 30, 2023	Nov. 30, 2023	Jan. 27, 2023
Business Acquisition [Line Items]
Goodwill	$ 3,070,241	$ 3,095,045
Noveprim Group
Business Acquisition [Line Items]
Trade receivables			$ 1,308
Inventories			66,500
Other current assets (excluding cash)			3,467
Property, plant and equipment			35,831
Operating lease right-of-use asset, net			104
Goodwill			172,846
Definite-lived intangible assets			9,500
Other long-term assets			167,907
Deferred revenue			0
Other current liabilities			(16,378)
Operating lease right-of-use liabilities (Long-term)			(97)
Deferred tax liabilities			(12,984)
Other long-term liabilities			(7,796)
Redeemable noncontrolling interest			(45,374)
Total purchase price allocation			374,834
Biological assets			$ 167,800
Biological assets, useful life			8 years
Business combination, remaining equity to purchase			10.00%
SAMDI Tech, Inc.
Business Acquisition [Line Items]
Trade receivables				$ 513
Inventories				0
Other current assets (excluding cash)				75
Property, plant and equipment				593
Operating lease right-of-use asset, net				0
Goodwill				37,129
Definite-lived intangible assets				33,070
Other long-term assets				6
Deferred revenue				(43)
Other current liabilities				(351)
Operating lease right-of-use liabilities (Long-term)				0
Deferred tax liabilities				(8,191)
Other long-term liabilities				0
Redeemable noncontrolling interest				0
Total purchase price allocation				$ 62,801

ACQUISITIONS AND DIVESTITURES - Definite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	Nov. 30, 2023	Jan. 27, 2023
Noveprim Group
Business Acquisition [Line Items]
Definite-Lived Intangible Assets	$ 9,500
Weighted Average Amortization Life	7 years
SAMDI Tech, Inc.
Business Acquisition [Line Items]
Definite-Lived Intangible Assets		$ 33,070
Weighted Average Amortization Life		12 years
Client relationships \| Noveprim Group
Business Acquisition [Line Items]
Definite-Lived Intangible Assets	$ 0
Weighted Average Amortization Life	0 years
Client relationships \| SAMDI Tech, Inc.
Business Acquisition [Line Items]
Definite-Lived Intangible Assets		$ 23,400
Weighted Average Amortization Life		15 years
Other intangible assets \| Noveprim Group
Business Acquisition [Line Items]
Definite-Lived Intangible Assets	$ 9,500
Weighted Average Amortization Life	7 years
Other intangible assets \| SAMDI Tech, Inc.
Business Acquisition [Line Items]
Definite-Lived Intangible Assets		$ 9,670
Weighted Average Amortization Life		7 years

REVENUE FROM CONTRACTS WITH CUSTOMERS - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023	Dec. 30, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Percentage of unbilled revenue billed during period	70.00%	70.00%
Unbilled revenue	$ 221,793		$ 228,020	$ 204,000
Percentage of contract liabilities recognized as revenue during period	60.00%	65.00%
Contract liabilities			273,000	$ 290,000
Unpaid advanced client billings	$ 52,000		$ 41,000
Provision for credit losses	839	$ 3,238
Performance obligations expected to be satisfied	$ 920,500
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-03-31
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation, percentage	50.00%
Performance obligations expected to be satisfied, expected timing	12 months

REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenues by Major Business Line (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,011,560	$ 1,029,373
RMS
Disaggregation of Revenue [Line Items]
Total revenue	220,907	199,766
RMS \| Services and products transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	97,049	93,639
RMS \| Services and products transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	123,858	106,127
DSA
Disaggregation of Revenue [Line Items]
Total revenue	605,452	662,353
DSA \| Services and products transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	604,125	661,836
DSA \| Services and products transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	1,327	517
Manufacturing
Disaggregation of Revenue [Line Items]
Total revenue	185,201	167,254
Manufacturing \| Services and products transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	100,058	86,086
Manufacturing \| Services and products transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	$ 85,143	$ 81,168

REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Client Receivables, Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 30, 2023	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Client receivables	$ 590,594	$ 578,077
Unbilled revenue	221,793	228,020	$ 204,000
Total	812,387	806,097
Less: Allowance for credit losses	(25,407)	(25,722)
Trade receivables and contract assets, net	786,980	780,375
Current deferred revenue	256,383	241,820
Long-term deferred revenue (included in Other long-term liabilities)	32,448	30,919
Customer contract deposits (included in Other current liabilities)	$ 90,589	$ 85,554

REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Lease Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Revenue from Contract with Customer [Abstract]
Lease revenue	$ 20,974	$ 24,090

REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 25,722	$ 11,278
Additions	934	5,731
Deductions	(1,249)	(315)
Ending balance	$ 25,407	$ 16,694

SEGMENT AND GEOGRAPHIC INFORMATION - Revenue and Other Financial Information by Reportable Segment (Details) $ in Thousands	3 Months Ended
	Mar. 30, 2024 USD ($) segment	Apr. 01, 2023 USD ($)
Segment Reporting [Abstract]
Number of reportable segments \| segment	3
Segment Reporting Information [Line Items]
Revenue	$ 1,011,560	$ 1,029,373
Cost of revenue (excluding amortization of intangible assets)	666,717	651,719
Selling, general and administrative	186,291	174,846
Amortization of intangible assets	32,575	34,916
Operating income	125,977	167,892
Capital Expenditures	79,144	106,875
Depreciation and amortization	85,357	77,069
Unallocated corporate
Segment Reporting Information [Line Items]
Selling, general and administrative	65,692	46,054
Operating income	(65,692)	(46,054)
Capital Expenditures	1,279	869
Depreciation and amortization	1,640	1,046
RMS
Segment Reporting Information [Line Items]
Revenue	220,907	199,766
RMS \| Operating Segments
Segment Reporting Information [Line Items]
Revenue	220,907	199,766
Cost of revenue (excluding amortization of intangible assets)	140,925	126,804
Selling, general and administrative	30,893	27,058
Amortization of intangible assets	5,940	5,495
Operating income	43,149	40,409
Capital Expenditures	20,044	19,084
Depreciation and amortization	18,123	13,489
DSA
Segment Reporting Information [Line Items]
Revenue	605,452	662,353
DSA \| Operating Segments
Segment Reporting Information [Line Items]
Revenue	605,452	662,353
Cost of revenue (excluding amortization of intangible assets)	417,912	411,523
Selling, general and administrative	56,859	61,998
Amortization of intangible assets	15,842	17,401
Operating income	114,839	171,431
Capital Expenditures	48,959	65,184
Depreciation and amortization	45,789	42,450
Manufacturing
Segment Reporting Information [Line Items]
Revenue	185,201	167,254
Manufacturing \| Operating Segments
Segment Reporting Information [Line Items]
Revenue	185,201	167,254
Cost of revenue (excluding amortization of intangible assets)	107,880	113,392
Selling, general and administrative	32,847	39,736
Amortization of intangible assets	10,793	12,020
Operating income	33,681	2,106
Capital Expenditures	8,862	21,738
Depreciation and amortization	$ 19,805	$ 20,084

SEGMENT AND GEOGRAPHIC INFORMATION - Revenue and Long-Lived Assets by Geographic Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023	Dec. 30, 2023
Segment Reporting Information [Line Items]
Revenue	$ 1,011,560	$ 1,029,373
Long-lived assets	1,618,708		$ 1,639,741
U.S.
Segment Reporting Information [Line Items]
Revenue	562,317	605,441
Long-lived assets	954,225		964,176
Europe
Segment Reporting Information [Line Items]
Revenue	276,319	267,703
Long-lived assets	404,657		407,375
Canada
Segment Reporting Information [Line Items]
Revenue	110,401	110,606
Long-lived assets	153,443		157,483
Asia Pacific
Segment Reporting Information [Line Items]
Revenue	45,772	42,813
Long-lived assets	71,076		74,605
Other
Segment Reporting Information [Line Items]
Revenue	16,751	$ 2,810
Long-lived assets	$ 35,307		$ 36,102

SUPPLEMENTAL CASH FLOW INFORMATION - Summary of Non-Cash Investing Activities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Supplemental Cash Flow Information [Abstract]
Cash paid for income taxes	$ 18,728	$ 13,618
Cash paid for interest	38,258	36,807
Purchases of Property, plant and equipment included in Accounts payable and Accrued liabilities	23,911	43,116
Assets acquired under finance leases	$ 3,159	$ 0

SUPPLEMENTAL CASH FLOW INFORMATION - Summary of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 30, 2023	Apr. 01, 2023	Dec. 31, 2022
Supplemental Cash Flow Information [Abstract]
Cash and cash equivalents	$ 327,039	$ 276,771
Restricted cash included in Other current assets	10,327	5,803
Restricted cash included in Other assets	1,169	1,906
Cash, cash equivalents, and restricted cash, end of period	$ 338,535	$ 284,480	$ 208,891	$ 241,214

INVENTORY (Details) - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 30, 2023
Inventory Disclosure [Abstract]
Raw materials and supplies	$ 44,603	$ 42,296
Work in process	43,252	59,727
Finished products	273,426	278,236
Inventories	$ 361,281	$ 380,259

PROPERTY, PLANT AND EQUIPMENT, NET (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023	Dec. 30, 2023
Property, Plant and Equipment [Line Items]
Total	$ 2,983,096		$ 2,975,050
Less: Accumulated depreciation	(1,364,388)		(1,335,309)
Property, plant and equipment, net	1,618,708		1,639,741
Depreciation	45,700	$ 42,200
Land
Property, Plant and Equipment [Line Items]
Total	78,852		79,546
Buildings
Property, Plant and Equipment [Line Items]
Total	1,033,150		1,053,915
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total	985,006		984,867
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total	348,558		366,556
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total	30,712		31,284
Computer hardware and software
Property, Plant and Equipment [Line Items]
Total	254,018		254,413
Vehicles
Property, Plant and Equipment [Line Items]
Total	6,974		6,746
Construction in progress
Property, Plant and Equipment [Line Items]
Total	$ 245,826		$ 197,723

VENTURE CAPITAL AND STRATEGIC EQUITY INVESTMENTS - Venture Capital Investments and Strategic Investments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Schedule of Equity Method Investments [Roll Forward]
Beginning balance	$ 243,811
Ending balance	243,543
Venture Capital Funds
Schedule of Equity Method Investments [Roll Forward]
Beginning balance	121,158	$ 129,012
Capital contributions	3,829	3,214
Distributions	(9,353)	(7,217)
Gain (loss)	8,174	(6,848)
Foreign currency translation	(100)	260
Ending balance	123,708	118,421
Strategic Investments
Schedule of Equity Method Investments [Roll Forward]
Beginning balance	122,653	182,590
Purchases of additional equity interests, net	0	9,266
Distributions	0	(4,146)
Gain (loss)	(2,294)	3,566
Reduction for acquisition of entity	0	(12,635)
Foreign currency translation	(524)	(3,275)
Ending balance	$ 119,835	$ 175,366

FAIR VALUE - Fair Value of Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 30, 2023
Other assets:
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other income (expense), net	Other income (expense), net
Fair Value, Recurring
Current assets measured at fair value:
Cash equivalents	$ 29	$ 29
Term deposit	10,068
Other assets:
Life insurance policies	44,617	40,912
Interest rate swap	1,734	966
Total assets measured at fair value	56,448	41,907
Other long-term liabilities measured at fair value:
Contingent consideration	33,265	33,265
Total liabilities measured at fair value	33,265	33,265
Level 1 \| Fair Value, Recurring
Current assets measured at fair value:
Cash equivalents	0	0
Term deposit	0
Other assets:
Life insurance policies	0	0
Interest rate swap	0	0
Total assets measured at fair value	0	0
Other long-term liabilities measured at fair value:
Contingent consideration	0	0
Total liabilities measured at fair value	0	0
Level 2 \| Fair Value, Recurring
Current assets measured at fair value:
Cash equivalents	29	29
Term deposit	10,068
Other assets:
Life insurance policies	44,617	40,912
Interest rate swap	1,734	966
Total assets measured at fair value	56,448	41,907
Other long-term liabilities measured at fair value:
Contingent consideration	0	0
Total liabilities measured at fair value	0	0
Level 3 \| Fair Value, Recurring
Current assets measured at fair value:
Cash equivalents	0	0
Term deposit	0
Other assets:
Life insurance policies	0	0
Interest rate swap	0	0
Total assets measured at fair value	0	0
Other long-term liabilities measured at fair value:
Contingent consideration	33,265	33,265
Total liabilities measured at fair value	$ 33,265	$ 33,265

FAIR VALUE - Narrative (Details) - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 30, 2023	Apr. 01, 2023	Dec. 31, 2022
Designated as Hedging Instrument \| Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional amount	$ 500,000	$ 500,000
Derivative, fixed interest rate	4.65%	4.65%
Level 3 \| Contingent Consideration
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of contingent consideration	$ 33,265	$ 33,265	$ 10,543	$ 13,431
Weighted average probability percentage of achieving maximum target	60.00%
Level 3 \| Average Volatility \| Contingent Consideration
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, measurement input	0.07
Level 3 \| Weighted Average Cost of Capital \| Contingent Consideration
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, measurement input	0.09
Level 3 \| Maximum \| Contingent Consideration
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of contingent consideration	$ 55,000

FAIR VALUE - Contingent Consideration (Details) - Contingent Consideration - Level 3 - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 33,265	$ 13,431
Payments	0	(2,711)
Foreign currency translation	0	(177)
Ending balance	$ 33,265	$ 10,543

FAIR VALUE - Schedule of Fair Value of Debt (Details) - Senior Notes - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 30, 2023
4.25% Senior Notes due 2028
Debt Instrument [Line Items]
Stated interest rate	4.25%	4.25%
4.25% Senior Notes due 2028 \| Book Value
Debt Instrument [Line Items]
Debt instrument value	$ 500,000	$ 500,000
4.25% Senior Notes due 2028 \| Fair Value
Debt Instrument [Line Items]
Debt instrument value	$ 468,750	$ 478,100
3.75% Senior Notes due 2029
Debt Instrument [Line Items]
Stated interest rate	3.75%	3.75%
3.75% Senior Notes due 2029 \| Book Value
Debt Instrument [Line Items]
Debt instrument value	$ 500,000	$ 500,000
3.75% Senior Notes due 2029 \| Fair Value
Debt Instrument [Line Items]
Debt instrument value	$ 453,750	$ 458,100
4.00% Senior Notes due 2031
Debt Instrument [Line Items]
Stated interest rate	4.00%	4.00%
4.00% Senior Notes due 2031 \| Book Value
Debt Instrument [Line Items]
Debt instrument value	$ 500,000	$ 500,000
4.00% Senior Notes due 2031 \| Fair Value
Debt Instrument [Line Items]
Debt instrument value	$ 445,000	$ 449,350

GOODWILL AND INTANGIBLE ASSETS - Rollforward of Goodwill (Details) $ in Thousands	3 Months Ended
	Mar. 30, 2024 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 3,095,045
Acquisitions	497
Foreign exchange	(25,301)
Ending balance	3,070,241
RMS
Goodwill [Roll Forward]
Beginning balance	497,474
Acquisitions	0
Foreign exchange	(407)
Ending balance	497,067
DSA
Goodwill [Roll Forward]
Beginning balance	1,662,434
Acquisitions	497
Foreign exchange	(21,340)
Ending balance	1,641,591
Goodwill, impaired, accumulated impairment loss	1,000,000
Manufacturing
Goodwill [Roll Forward]
Beginning balance	935,137
Acquisitions	0
Foreign exchange	(3,554)
Ending balance	$ 931,583

GOODWILL AND INTANGIBLE ASSETS - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 30, 2023
Other intangible assets
Gross	$ 1,713,953	$ 1,729,559
Accumulated Amortization	(886,315)	(865,508)
Net	827,638	864,051
Client relationships
Other intangible assets
Gross	1,515,021	1,528,780
Accumulated Amortization	(739,260)	(721,322)
Net	775,761	807,458
Technology
Other intangible assets
Gross	140,982	142,190
Accumulated Amortization	(112,842)	(111,764)
Net	28,140	30,426
Trademarks and trade names
Other intangible assets
Gross	11,842	11,878
Accumulated Amortization	(4,822)	(4,568)
Net	7,020	7,310
Backlog
Other intangible assets
Gross	3,100	3,100
Accumulated Amortization	(2,485)	(2,177)
Net	615	923
Other
Other intangible assets
Gross	43,008	43,611
Accumulated Amortization	(26,906)	(25,677)
Net	$ 16,102	$ 17,934

GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 32,575	$ 34,916

DEBT AND OTHER FINANCING ARRANGEMENTS - Schedule of Long-Term Debt (Details) - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 30, 2023
Debt Instrument [Line Items]
Finance leases	$ 30,230	$ 28,550
Total debt and finance leases	2,676,746	2,667,368
Current portion of long-term debt	459	3,172
Current portion of finance leases	2,169	2,398
Current portion of long-term debt and finance leases	2,628	5,570
Long-term debt and finance leases	2,674,118	2,661,798
Debt discount and debt issuance costs	(13,659)	(14,651)
Long-term debt, net and finance leases	2,660,459	2,647,147
Revolving Facility
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,133,000	$ 1,129,243
Senior Notes \| 4.25% Senior Notes due 2028
Debt Instrument [Line Items]
Stated interest rate	4.25%	4.25%
Long-term debt, gross	$ 500,000	$ 500,000
Senior Notes \| 3.75% Senior Notes due 2029
Debt Instrument [Line Items]
Stated interest rate	3.75%	3.75%
Long-term debt, gross	$ 500,000	$ 500,000
Senior Notes \| 4.00% Senior Notes due 2031
Debt Instrument [Line Items]
Stated interest rate	4.00%	4.00%
Long-term debt, gross	$ 500,000	$ 500,000
Other Debt
Debt Instrument [Line Items]
Long-term debt, gross	$ 13,516	$ 9,575

DEBT AND OTHER FINANCING ARRANGEMENTS - Narrative (Details) - USD ($) $ in Millions	Mar. 30, 2024	Dec. 30, 2023
Debt Instrument [Line Items]
Weighted average interest rate	4.97%	4.93%
Letter of Credit
Debt Instrument [Line Items]
Letters of credit outstanding	$ 21.2	$ 21.6

EQUITY AND NONCONTROLLING INTERESTS - Earnings Per Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Numerator:
Net income	$ 74,482	$ 103,954
Less: Net income attributable to noncontrolling interests	1,522	823
Net income available to Charles River Laboratories International, Inc.	72,960	103,131
Less: Adjustment of redeemable noncontrolling interest	401	0
Less: Incremental dividends attributable to noncontrolling interest holders	5,230	0
Net income available to Charles River Laboratories International, Inc. common shareholders	$ 67,329	$ 103,131
Denominator:
Weighted-average shares outstanding—Basic (in shares)	51,437	51,097
Effect of dilutive securities:
Stock options, restricted stock units and performance share units (in shares)	405	331
Weighted-average shares outstanding—Diluted (in shares)	51,842	51,428
Anti-dilutive common stock equivalents (in shares)	448	405

EQUITY AND NONCONTROLLING INTERESTS - Narrative (Details) - USD ($) shares in Millions	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Treasury Shares and Accelerated Stock Repurchase Program (ASR) [Line Items]
Shares acquired to satisfy minimum individual statutory tax withholdings for vesting of equity instruments (in shares)	0.1	0.1
Shares acquired to satisfy minimum individual statutory tax withholdings for vesting of equity instruments	$ 9,400,000	$ 19,000,000
Authorized Share Repurchase Program
Treasury Shares and Accelerated Stock Repurchase Program (ASR) [Line Items]
Aggregate authorization of share repurchase program	1,300,000,000
Remaining authorized repurchase amount	$ 129,100,000

EQUITY AND NONCONTROLLING INTERESTS - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]
Beginning balance	$ 3,602,276	$ 2,981,078
Income tax expense (benefit)	(5,473)	(1,038)
Ending balance	3,646,150	3,113,883
Foreign Currency Translation Adjustment and Other
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]
Beginning balance	(149,999)
Other comprehensive income (loss) before reclassifications	(60,077)
Net current period other comprehensive income (loss)	(60,077)
Income tax expense (benefit)	(5,737)
Ending balance	(204,339)
Pension and Other Post-Retirement Benefit Plans
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]
Beginning balance	(47,167)
Other comprehensive income (loss) before reclassifications	344
Net current period other comprehensive income (loss)	344
Income tax expense (benefit)	80
Ending balance	(46,903)
Net Unrealized (Loss) Gain on Cash Flow Hedge
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]
Beginning balance	739
Other comprehensive income (loss) before reclassifications	768
Net current period other comprehensive income (loss)	768
Income tax expense (benefit)	184
Ending balance	1,323
Total
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]
Beginning balance	(196,427)	(262,057)
Other comprehensive income (loss) before reclassifications	(58,965)
Net current period other comprehensive income (loss)	(58,965)
Income tax expense (benefit)	(5,473)
Ending balance	$ (249,919)	$ (239,124)

EQUITY AND NONCONTROLLING INTERESTS - Nonredeemable and Redeemable Noncontrolling Interest - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended
	May 09, 2024	Jun. 30, 2022	Mar. 30, 2024	Dec. 30, 2023	Apr. 01, 2023	Nov. 30, 2023	Dec. 31, 2022	Dec. 28, 2019
Schedule of Investments [Line Items]
Incremental dividends attributed to noncontrolling interest holders			$ 5,230		$ 0
Adjustment of redeemable noncontrolling interests to redemption value			4,807		$ 0
Additional Paid-In Capital
Schedule of Investments [Line Items]
Adjustment of redeemable noncontrolling interests to redemption value			4,406
Retained Earnings
Schedule of Investments [Line Items]
Adjustment of redeemable noncontrolling interests to redemption value			$ 401
Noveprim Group
Schedule of Investments [Line Items]
Percentage of voting interests acquired						41.00%
Noveprim Group
Schedule of Investments [Line Items]
Equity interest			90.00%
Noncontrolling interest ownership percentage			10.00%
Contractually defined redemption value			$ 45,800
Dividend fair value			8,000
Incremental dividends attributed to noncontrolling interest holders			5,200
Noveprim Group \| Additional Paid-In Capital
Schedule of Investments [Line Items]
Adjustment of redeemable noncontrolling interests to redemption value			1,700
Noveprim Group \| Retained Earnings
Schedule of Investments [Line Items]
Adjustment of redeemable noncontrolling interests to redemption value			400
Noveprim Group \| Minimum
Schedule of Investments [Line Items]
Contractually defined redemption value			47,000
Noveprim Group \| Maximum
Schedule of Investments [Line Items]
Contractually defined redemption value			54,000
Supplier
Schedule of Investments [Line Items]
Equity interest								80.00%
Noncontrolling interest ownership percentage		10.00%						20.00%
Contractually defined redemption value			12,000
Additional ownership percentage acquired by parent		10.00%
Purchase of additional equity interest		$ 15,000
Supplier \| Subsequent Event
Schedule of Investments [Line Items]
Purchase of additional equity interest	$ 12,000
Supplier \| Additional Paid-In Capital
Schedule of Investments [Line Items]
Adjustment of redeemable noncontrolling interests to redemption value			$ 2,800
Vital River
Schedule of Investments [Line Items]
Equity interest							92.00%
Noncontrolling interest ownership percentage				8.00%
Payments for repurchase of redeemable noncontrolling interest				$ 4,800
Redeemable noncontrolling interest, purchase price payable				$ 24,400

INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended
INCOME TAXES (Details) - USD ($) $ in Thousands	Mar. 30, 2024	Apr. 01, 2023	Dec. 30, 2023
Income Tax Disclosure [Abstract]
Effective tax rate	24.80%	20.70%
Increase in unrecognized tax benefits	$ 700
Unrecognized tax benefits	23,400
Increase in unrecognized tax benefits that would impact effective tax rate	400
Unrecognized tax benefits that would impact effective tax rate	20,700
Accrued interest on unrecognized tax benefits	1,400
Decrease in unrecognized tax benefits that are reasonably possibly over the next twelve-month period	5,000
Prepaid income tax	60,311		$ 59,715
Accrued income taxes	$ 34,102		$ 38,819

RESTRUCTURING AND ASSET IMPAIRMENTS - Restructuring Costs by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Segment Reporting Information [Line Items]
Total	$ 16,999	$ 3,486
Operating Segments \| RMS
Segment Reporting Information [Line Items]
Total	7,387	0
Operating Segments \| DSA
Segment Reporting Information [Line Items]
Total	6,491	(2)
Operating Segments \| Manufacturing
Segment Reporting Information [Line Items]
Total	1,631	3,488
Unallocated corporate
Segment Reporting Information [Line Items]
Total	$ 1,490	$ 0

RESTRUCTURING AND ASSET IMPAIRMENTS - Restructuring Costs for Productivity Improvement (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Restructuring Cost and Reserve [Line Items]
Total	$ 16,999	$ 3,486
Severance and Transition Costs
Restructuring Cost and Reserve [Line Items]
Total	9,037	914
Asset Impairments and Other Costs
Restructuring Cost and Reserve [Line Items]
Total	7,962	2,572
Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Total	9,073	337
Selling, general and administrative \| Severance and Transition Costs
Restructuring Cost and Reserve [Line Items]
Total	3,549	329
Selling, general and administrative \| Asset Impairments and Other Costs
Restructuring Cost and Reserve [Line Items]
Total	5,524	8
Cost of services provided (excluding amortization of intangible assets) \| Cost of services provided and products sold (excluding amortization of intangible assets)
Restructuring Cost and Reserve [Line Items]
Total	5,918	567
Cost of services provided (excluding amortization of intangible assets) \| Cost of services provided and products sold (excluding amortization of intangible assets) \| Severance and Transition Costs
Restructuring Cost and Reserve [Line Items]
Total	4,810	567
Cost of services provided (excluding amortization of intangible assets) \| Cost of services provided and products sold (excluding amortization of intangible assets) \| Asset Impairments and Other Costs
Restructuring Cost and Reserve [Line Items]
Total	1,108	0
Cost of products sold (excluding amortization of intangible assets) \| Cost of services provided and products sold (excluding amortization of intangible assets)
Restructuring Cost and Reserve [Line Items]
Total	2,008	2,582
Cost of products sold (excluding amortization of intangible assets) \| Cost of services provided and products sold (excluding amortization of intangible assets) \| Severance and Transition Costs
Restructuring Cost and Reserve [Line Items]
Total	678	18
Cost of products sold (excluding amortization of intangible assets) \| Cost of services provided and products sold (excluding amortization of intangible assets) \| Asset Impairments and Other Costs
Restructuring Cost and Reserve [Line Items]
Total	$ 1,330	$ 2,564

RESTRUCTURING AND ASSET IMPAIRMENTS - Narrative (Details) - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 30, 2023	Apr. 01, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Severance and other personnel personnel related costs liabilities and facilities related costs liabilities	$ 10,812	$ 5,050	$ 1,889	$ 1,300
Accrued Compensation \| Severance and Transition Costs
Segment Reporting Information [Line Items]
Severance and other personnel personnel related costs liabilities and facilities related costs liabilities	$ 10,800	$ 5,100

RESTRUCTURING AND ASSET IMPAIRMENTS - Rollforward of Severance and Transition and Lease Obligation Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Restructuring Reserve [Roll Forward]
Beginning balance	$ 5,050	$ 1,300
Expense (excluding non-cash charges)	9,037	914
Payments / utilization	(3,235)	(331)
Foreign currency adjustments	(40)	6
Ending balance	$ 10,812	$ 1,889