UNMA Unum Group

We are offering through this prospectus supplement $400,000,000 aggregate principal amount of our 6.000% senior notes due 2054, which we refer to in this prospectus supplement as the “senior notes.”

The senior notes will mature on June 15, 2054. Interest on the senior notes is payable in arrears on each June 15 and December 15, beginning on December 15, 2024.

The senior notes will be redeemable at our option in whole or in part, at any time and from time to time prior to December 15, 2053 (the “Par Call Date”) at a redemption price equal to the greater of (i) 100% of the principal amount to be redeemed plus accrued and unpaid interest to the date of redemption and (ii) the “Make-Whole Redemption Amount” calculated as described in this prospectus supplement. In addition, on or after the Par Call Date, we will have the right to redeem the senior notes at our option in whole or in part, at any time and from time to time, at a redemption price equal to 100% of the principal amount to be redeemed plus accrued and unpaid interest to the date of redemption.

The senior notes are issuable in denominations of $2,000 and integral multiples of $1,000 in excess thereof.

The senior notes will be unsecured and rank equally with all of our other unsecured and unsubordinated debt. In addition, the senior notes will be structurally subordinated to any indebtedness of our subsidiaries.

Investing in the senior notes involves risks. We urge you to carefully read the “Risk Factors” section beginning on page S-5 of this prospectus supplement, and the “Item 1A. Risk Factors” section of our annual report on Form 10-K for the year ended December 31, 2023 before you make any decision to invest in the senior notes.

Neither the Securities and Exchange Commission (the “SEC”) nor any state securities commission has approved or disapproved of these senior notes or determined if this prospectus supplement or the accompanying prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The underwriters expect to deliver the senior notes to purchasers through the book-entry delivery system of The Depository Trust Company for the accounts of its participants, including Clearstream Banking, S.A., and Euroclear Bank SA/NV, on or about June 10, 2024, against payment in immediately available funds.

You should read this prospectus supplement along with the accompanying prospectus and the documents incorporated by reference in the accompanying prospectus. The information contained in this prospectus supplement supersedes any inconsistent information contained in the accompanying prospectus. We are responsible for the information contained in this prospectus supplement and contained or incorporated by reference in the accompanying prospectus, and in any related free writing prospectus we prepare or authorize. We have not, and the underwriters have not, authorized anyone to provide you with any other information, and we and the underwriters take no responsibility for other information others may give you. We and the underwriters are not making an offer to sell these securities in any jurisdiction where the offer is not permitted. You should not assume that the information contained in this prospectus supplement, or contained or incorporated by reference in the accompanying prospectus, or in any related free writing prospectus is accurate as of any date other than their respective dates.

Unless we have indicated otherwise, or the context otherwise requires, references in this prospectus supplement and the accompanying prospectus to “Unum,” “we,” “us,” and “our” or similar terms are to Unum Group and its subsidiaries.

Investing in the senior notes involves risks. In considering whether you should invest in the senior notes, you should consider all of the information we have included or incorporated by reference in this prospectus supplement and the accompanying prospectus. In particular, you should carefully consider the risk factors described below, in our 2023 10-K under “Item 1A. Risk Factors” and in any other documents incorporated by reference in the accompanying prospectus prior to the date of this prospectus supplement.

As of March 31, 2024, Unum Group had long-term debt, consisting primarily of unsecured senior notes, the Term Loan Facility and junior subordinated debt securities, totaling $3,431.0 million, net of deferred debt issuance costs of $30.0 million.

The senior notes and the indenture governing the senior notes generally do not contain restrictive covenants, such as a limitation on the payments of dividends, the incurrence of indebtedness or the issuance or repurchase of securities by us. Our credit facilities include financial covenants that place limitations on our leverage ratio and consolidated net worth. The credit facilities also include covenants that limit subsidiary indebtedness. Within these limitations, we may incur substantial additional indebtedness in the future, which could affect our ability to make payments under the senior notes.

Holders of senior notes may accelerate payment of the principal and accrued and unpaid interest on the senior notes only upon the occurrence and continuation of an event of default. An event of default is generally limited to payment defaults, breaches of specific covenants and specific events of bankruptcy, insolvency and reorganization relating to us.

Unum Group is a holding company with no operations of its own. Our ability to pay our obligations under the senior notes is dependent upon our ability to obtain cash dividends or other cash payments or loans from our subsidiaries, including our U.S. insurance subsidiaries and Unum Limited. Our insurance company subsidiaries are subject to regulatory limitations on the payment of dividends and on other transfers of funds to us, which could impair our ability to meet our debt obligations under the senior notes. See “Liquidity and Capital Resources” included in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” contained in our quarterly report on Form 10-Q for the quarter ended March 31, 2024 for a discussion of the existing regulatory limitations on dividends.

In addition, because Unum Group is a holding company, except to the extent that it has priority or equal claims against its subsidiaries as a creditor, its obligations under the senior notes will be effectively subordinated to the obligations of its subsidiaries.

The senior notes will be unsecured and unsubordinated obligations and will:

At March 31, 2024, the aggregate amount of our outstanding consolidated indebtedness was $3,431.0 million, all of which was long-term debt and includes approximately $189.7 million to an unconsolidated subsidiary. All unsecured indebtedness would rank equal in right of payment with the senior notes. All obligations (including insurance obligations) of our subsidiaries would be effectively senior to the senior notes. At March 31, 2024, the aggregate amount of indebtedness of our subsidiaries (excluding intercompany liabilities) was approximately $189.7 million, all of which is indebtedness of an unconsolidated subsidiary.

Furthermore, in the event of insolvency, bankruptcy, liquidation, dissolution, receivership, reorganization or similar event involving a subsidiary, the assets of that subsidiary would be used to satisfy claims of policyholders and creditors of the subsidiary rather than our creditors. As a result of the application of the subsidiary’s assets to satisfy claims of policyholders and creditors, the value of the stock of the subsidiary would be diminished and perhaps rendered worthless. Any such diminution in the value of the shares of our subsidiaries would adversely impact our financial condition and possibly impair our ability to meet our obligations on the debt securities. In addition, any liquidation of the assets of our subsidiaries to satisfy claims of the subsidiary’s policyholders and creditors might make it impossible for such subsidiary to pay dividends to us. This inability to pay dividends would further impair our ability to satisfy our obligations under the senior notes.

The senior notes are a new issue of securities and there is no established trading market for the senior notes. We cannot assure you that an active after-market for the senior notes will develop or be sustained or that holders of the senior notes will be able to sell their senior notes at favorable prices or at all. Although the underwriters have indicated to us that they intend to make a market in the senior notes, as permitted by applicable laws and regulations, they are not obligated to do so and may discontinue any such market-making at any time without notice. Accordingly, no assurance can be given as to the liquidity of, or trading markets for, the senior notes. We do not expect to list the senior notes on any national securities exchange or include them on any automated quotation system. The liquidity of any market for the senior notes will depend upon various factors, including:

In addition, the liquidity of the trading market in the senior notes, and the market price quoted for the senior notes, may be adversely affected by changes in the overall market for fixed income securities generally. As a result, an active trading market may not develop for the senior notes. If no active trading market develops, you may not be able to resell your senior notes at a price that reflects accrued and unpaid interest, if at all.

The Private Securities Litigation Reform Act of 1995 (the “Act”) provides a “safe harbor” to encourage companies to provide prospective information, as long as those statements are identified as forward-looking and are accompanied by meaningful cautionary statements identifying important factors that could cause actual results to differ materially from those included in the forward-looking statements. Certain information contained in this prospectus supplement and the accompanying prospectus or incorporated by reference in the accompanying prospectus, or in any other written or oral statements made by us in communications with the financial community or contained in documents filed with the SEC, may be considered forward-looking statements within the meaning of the Act. Forward-looking statements are those not based on historical information, but rather relate to our outlook, future operations, strategies, financial results, or other developments. Forward-looking statements speak only as of the date made. We undertake no obligation to update these statements, even if made available on our website or otherwise. These statements may be made directly in this prospectus supplement or the accompanying prospectus or may be made part of the accompanying prospectus by reference to other documents filed by us with the SEC, a practice which is known as “incorporation by reference.” You can find many of these statements by looking for words such as “will,” “may,” “should,” “could,” “believes,” “expects,” “anticipates,” “estimates,” “plans,” “assumes,” “intends,” “projects,” “goals,” “objectives,” or similar expressions in this prospectus supplement, the accompanying prospectus or in documents incorporated by reference in the accompanying prospectus.

These forward-looking statements are subject to numerous assumptions, risks, and uncertainties, many of which are beyond our control. We caution investors that the following factors, in addition to other factors mentioned from time to time, may cause actual results to differ materially from those contemplated by the forward-looking statements:

For further discussion of risks and uncertainties which could cause actual results to differ from those contained in the forward-looking statements, see “Risk Factors” in this prospectus supplement and “Item 1A. Risk Factors” of our 2023 10-K.

All subsequent written and oral forward-looking statements attributable to us or any person acting on our behalf are expressly qualified in their entirety by the cautionary statements contained or referred to in this section.

We estimate that the net proceeds from the sale of the senior notes in this offering will be approximately $386.7 million after deducting the underwriting discount and the estimated offering expenses payable by us. We intend to use the net proceeds from the sale of the senior notes, together with cash on hand, if necessary, to repay, in whole or in part, the $350 million aggregate principal amount of outstanding indebtedness under our Term Loan Facility and to pay the accrued interest to, but excluding, the date of repayment and any fees and related expenses. The balance of the net proceeds, if any, will be used for general corporate purposes, which could include additional redemptions or repurchases of outstanding debt.

The following description is a summary of the terms of the senior notes being offered through this prospectus supplement. The description is qualified in its entirety by reference to the indenture dated as of August 23, 2012, between us and The Bank of New York Mellon Trust Company, N.A., as trustee, as supplemented by the first supplemental indenture dated as of August 20, 2020 (as supplemented, the “indenture”) between us and the trustee. A copy of the indenture is on file with the SEC and may be obtained by accessing the internet address provided or contacting us as described under “Where You Can Find More Information.” You should read the indenture, the associated documents and the following description carefully to fully understand the terms of the senior notes. In addition, to the extent that the following description is not consistent with that contained in the accompanying prospectus under “Description of Debt Securities,” you should rely on this description.

The senior notes will be a series of senior debt securities described in the accompanying prospectus. We will issue the senior notes under the indenture. The senior notes will initially be limited in aggregate principal amount to $400,000,000. The senior notes will be issued only in denominations of $2,000 and integral multiples of $1,000 in excess thereof.

The stated maturity date of the senior notes will be June 15, 2054, and the senior notes will bear interest at the rate of 6.000% per year. Interest on the senior notes will accrue from June 10, 2024 or from the most recent interest payment date to which interest has been paid or duly provided for. Interest on the senior notes will be payable semi-annually in arrears on June 15 and December 15 of each year, beginning on December 15, 2024 (or, if such day is not a business day, on the next succeeding business day (without any interest or other payment in respect of any such delay), with the same force and effect as if made on the date the payment was originally payable, to the persons in whose names the senior notes are registered at the close of business on the preceding June 1 or December 1, as the case may be (whether or not a business day), provided that interest payable at the stated maturity date for the senior notes or upon redemption will be paid to the person to whom principal is payable.

Interest on the senior notes will be computed on the basis of a 360-day year consisting of twelve 30-day months. The trustee will act as paying agent for the senior notes.

We may, without the consent of the holders, reopen the series of senior notes and issue additional senior notes under the indenture with the same terms (other than the issue date, the public offering price and, if applicable, the initial interest payment date and initial interest accrual date) and with the same CUSIP number as the senior notes offered hereby in an unlimited aggregate principal amount, provided that no such additional senior notes may be issued unless they will be fungible with the senior notes for U.S. federal income tax and securities law purposes.

“business day” means, with respect to the senior notes, any day other than (i) a Saturday or Sunday, or (ii) a day that in the Borough of Manhattan, New York City is either a legal holiday or a day on which the federal or state banking institutions located therein are authorized or obligated by law, executive order or regulation to close.

The senior notes will not be entitled to any sinking fund.

The senior notes and the indenture will be governed by the laws of the State of New York.

Our ability to pay interest on the senior notes is dependent on our ability to obtain cash dividends or obtain loans from our subsidiaries. See “Risk Factors—Because we are a holding company with no operations of our own, our obligations under the senior notes are effectively subordinated to the obligations of our subsidiaries” in this prospectus supplement.

The senior notes are our unsecured senior obligations and will rank equal in right of payment to all of our other existing and future unsecured senior indebtedness. In addition, the senior notes are structurally subordinated to any indebtedness of our subsidiaries. At March 31, 2024, the aggregate amount of indebtedness of our subsidiaries (excluding intercompany liabilities) was approximately $189.7 million, all of which is indebtedness of an unconsolidated subsidiary.

Prior to December 15, 2053 (six months prior to the maturity date) (the “Par Call Date”), we may redeem the senior notes at our option, in whole or in part, at any time and from time to time, at a redemption price (expressed as a percentage of principal amount and rounded to three decimal places) equal to the greater of:

plus, in either case, accrued and unpaid interest thereon to the redemption date.

On or after the Par Call Date, we may redeem the senior notes, in whole or in part, at any time and from time to time, at a redemption price equal to 100% of the principal amount of the senior notes being redeemed plus accrued and unpaid interest thereon to the redemption date.

“Treasury Rate” means, with respect to any redemption date, the yield determined by us in accordance with the following two paragraphs.

The Treasury Rate shall be determined by us after 4:15 p.m., New York City time (or after such time as yields on U.S. government securities are posted daily by the Board of Governors of the Federal Reserve System), on the third business day preceding the redemption date based upon the yield or yields for the most recent day that appear after such time on such day in the most recent statistical release published by the Board of Governors of the Federal Reserve System designated as “Selected Interest Rates (Daily) - H.15” (or any successor designation or publication) (“H.15”) under the caption “U.S. government securities–Treasury constant maturities–Nominal” (or any successor caption or heading) (“H.15 TCM”). In determining the Treasury Rate, we shall select, as applicable: (1) the yield for the Treasury constant maturity on H.15 exactly equal to the period from the redemption date to the Par Call Date (the “Remaining Life”); or (2) if there is no such Treasury constant maturity on H.15 exactly equal to the Remaining Life, the two yields – one yield corresponding to the Treasury constant maturity on H.15 immediately shorter than and one yield corresponding to the Treasury constant maturity on H.15 immediately longer than the Remaining Life – and shall interpolate to the Par Call Date on a straight-line basis (using the actual number of days) using such yields and rounding the result to three decimal places; or (3) if there is no such Treasury constant maturity on H.15 shorter than or longer than the Remaining Life, the yield for the single Treasury constant maturity on H.15 closest to the Remaining Life. For purposes of this paragraph, the applicable Treasury constant maturity or maturities on H.15 shall be deemed to have a maturity date equal to the relevant number of months or years, as applicable, of such Treasury constant maturity from the redemption date.

If on the third business day preceding the redemption date H.15 TCM is no longer published, we shall calculate the Treasury Rate based on the rate per annum equal to the semi-annual equivalent yield to maturity at 11:00 a.m., New York City time, on the second business day preceding such redemption date of the United States Treasury security maturing on, or with a maturity that is closest to, the Par Call Date, as applicable. If there is no United States Treasury security maturing on the Par Call Date but there are two or more United States Treasury securities with a maturity date equally distant from the Par Call Date, one with a maturity date preceding the Par Call Date and one with a maturity date following the Par Call Date, we shall select the United States Treasury security with a maturity date preceding the Par Call Date. If there are two or more United States Treasury securities maturing on the Par Call Date or two or more United States Treasury securities meeting the criteria of the preceding sentence, we shall select from among these two or more United States Treasury securities the United States Treasury security that is trading closest to par based upon the average of the bid and asked prices

for such United States Treasury securities at 11:00 a.m., New York City time. In determining the Treasury Rate in accordance with the terms of this paragraph, the semi-annual yield to maturity of the applicable United States Treasury security shall be based upon the average of the bid and asked prices (expressed as a percentage of principal amount) at 11:00 a.m., New York City time, of such United States Treasury security, and rounded to three decimal places.

Our actions and determinations in determining the redemption price shall be conclusive and binding for all purposes, absent manifest error.

Unless the Company defaults in payment of the redemption price, on and after the redemption date interest will cease to accrue on the senior notes or portions thereof called for redemption.

Notice of any redemption will be mailed or electronically delivered (or otherwise transmitted in accordance with the depositary’s procedures) at least 5 but not more than 60 days before the redemption date to each holder of record of the senior notes to be redeemed at its registered address. The notice of redemption for such senior notes will state, among other things, the amount of senior notes to be redeemed, the redemption date, the manner of calculation of the redemption price and the place or places that payment will be made upon presentation and surrender of senior notes to be redeemed. If less than all of the senior notes are to be redeemed at our option, the senior notes, or portions of the senior notes, to be redeemed where represented by global notes will be selected for redemption by DTC in accordance with its selected procedures therefor. No senior notes of a principal amount of $2,000 or less will be redeemed in part. If any senior note is to be redeemed in part only, the notice of redemption that relates to the senior note will state the portion of the principal amount of the senior note to be redeemed. A new senior note in a principal amount equal to the unredeemed portion of the senior note will be issued in the name of the holder of the senior note upon surrender for cancellation of the original senior note. For so long as the senior notes are held by DTC (or another depositary), the redemption of the senior notes shall be done in accordance with the policies and procedures of the depositary.

We will not be required (i) to issue, register the transfer of or exchange any senior notes during a period beginning at the opening of business 10 days before the day of the delivery of a notice of redemption of senior notes selected for redemption and ending at the close of business on the day of such delivery, or (ii) to register the transfer of or exchange any senior notes so selected for redemption in whole or in part, except the unredeemed portion of any such senior notes being redeemed in part.

In addition to the covenants set forth in the indenture that apply to our senior debt securities generally, we have agreed that so long as any senior notes are outstanding, neither we nor any of our restricted subsidiaries may use any voting stock of a restricted subsidiary as security for any of our debt or other obligations unless any debt securities issued under the indenture are secured to the same extent as and for so long as that debt or other obligation is so secured. This restriction does not apply to liens existing at the time a corporation becomes our restricted subsidiary or any renewal or extension of any such existing lien and does not apply to shares of subsidiaries that are not “restricted subsidiaries.”

To qualify as our “subsidiary,” we must control, either directly or indirectly, more than 50% of the outstanding shares of voting stock of the corporation. We define “voting stock” as any class or classes of stock having general voting power under ordinary circumstances to elect a majority of the board of directors of the corporation in question, except that stock that carries only the right to vote conditionally on the happening of an event is not considered voting stock, and we define our “restricted subsidiaries” as (1) any present or future subsidiary of Unum Group, the total assets of which constitute at least 20% of our total consolidated assets, and (2) any successor to any such subsidiary.

The senior notes will be issued in the form of one or more global securities registered in the name of Cede & Co., as nominee of DTC. The senior notes will be issued only in denominations of $2,000 and integral multiples of $1,000 in excess thereof.

The senior notes will be subject to the defeasance and covenant defeasance provisions of the indenture.

We will issue the senior notes in the form of one or more global notes in definitive, fully registered, book- entry form. The global notes will be deposited with or on behalf of DTC and registered in the name of Cede & Co., as nominee of DTC.

Beneficial interests in the global notes will be represented through book-entry accounts of financial institutions acting on behalf of beneficial owners as direct and indirect participants in DTC. Investors may hold interests in the global notes through either DTC (in the United States), Clearstream Banking, S.A., which we refer to as Clearstream, or Euroclear Bank SA/NV, as operator of the Euroclear System, which we refer to as Euroclear, in Europe, either directly if they are participants in such systems or indirectly through organizations that are participants in such systems. Clearstream and Euroclear will hold interests on behalf of their participants through customers’ securities accounts in Clearstream’s and Euroclear’s names on the books of their U.S. depositaries, which in turn will hold such interests in customers’ securities accounts in the U.S. depositaries’ names on the books of DTC.

DTC has advised us as follows:

Clearstream has advised us that it is incorporated under the laws of Luxembourg as a professional depositary. Clearstream holds securities for its customers and facilitates the clearance and settlement of securities transactions between its customers through electronic book-entry changes in accounts of its customers, thereby eliminating the need for physical movement of certificates. Clearstream provides to its customers, among other things, services for safekeeping, administration, clearance and settlement of internationally traded securities and securities lending and borrowing. Clearstream interfaces with domestic markets in several countries. As a professional depositary, Clearstream is subject to regulation by the Luxembourg Commission for the Supervision of the Financial Section. Clearstream customers are recognized financial institutions around the world, including underwriters, securities brokers and dealers, banks, trust companies, clearing corporations and other organizations and may include the underwriters. Indirect access to Clearstream is also available to others, such as banks, brokers, dealers and trust companies that clear through or maintain a custodial relationship with a Clearstream customer either directly or indirectly.

Euroclear has advised us that it was created in 1968 to hold securities for participants of Euroclear and to clear and settle transactions between Euroclear participants through simultaneous electronic book-entry delivery against payment, thereby eliminating the need for physical movement of certificates and any risk from lack of simultaneous transfers of securities and cash. Euroclear provides various other services, including securities lending and borrowing and interfaces with domestic markets in several countries. Euroclear is operated by Euroclear Bank SA/NV, which we refer to as the Euroclear Operator, under contract with Euroclear Clearance Systems S.C., a Belgian cooperative corporation, which we refer to as the Cooperative. All operations are conducted by the Euroclear Operator, and all Euroclear securities clearance accounts and Euroclear cash accounts are accounts with the Euroclear Operator, not the Cooperative. The Cooperative establishes policy for Euroclear on behalf of Euroclear participants. Euroclear participants include banks (including central banks), securities brokers and dealers, and other professional financial intermediaries and may include the underwriters. Indirect access to Euroclear is also available to other firms that clear through or maintain a custodial relationship with a Euroclear participant, either directly or indirectly.

The Euroclear Operator has advised us that it is licensed by the Belgian Banking and Finance Commission to carry out banking activities on a global basis. As a Belgian bank, it is regulated and examined by the Belgian Banking and Finance Commission.

We have provided the descriptions of the operations and procedures of DTC, Clearstream and Euroclear in this prospectus supplement solely as a matter of convenience. These operations and procedures are solely within the control of those organizations and are subject to change by them from time to time. None of us, the underwriters nor the trustee takes any responsibility for these operations or procedures, and you are urged to contact DTC, Clearstream and Euroclear or their participants directly to discuss these matters.

We expect that under procedures established by DTC:

The laws of some jurisdictions may require that purchasers of securities take physical delivery of those securities in definitive form. Accordingly, the ability to transfer interests in the senior notes represented by a global note to those persons may be limited. In addition, because DTC can act only on behalf of its participants, who in turn act on behalf of persons who hold interests through participants, the ability of a person having an interest in the senior notes represented by a global note to pledge or transfer those interests to persons or entities that do not participate in DTC’s system, or otherwise to take actions in respect of such interest, may be affected by the lack of a physical definitive security in respect of such interest.

So long as DTC or its nominee is the registered owner of a global note, DTC or that nominee will be considered the sole owner or holder of the senior notes represented by that global note for all purposes under the indenture and under the senior notes. Except as provided below, owners of beneficial interests in a global note will not be entitled to have the senior notes represented by that global note registered in their names, will not receive or be entitled to receive physical delivery of certificated notes and will not be considered the owners or holders thereof under the indenture or under the senior notes for any purpose, including with respect to the giving of any direction, instruction or approval to the trustee. Accordingly, each holder owning a beneficial interest in a global note must rely on the procedures of DTC and, if that holder is not a direct or indirect participant, on the procedures of the participant through which that holder owns its interest, to exercise any rights of a holder of senior notes under the indenture or a global note.

Neither we nor the trustee will have any responsibility or liability for any aspect of the records relating to or payments made on account of senior notes by DTC, Clearstream or Euroclear, or for maintaining, supervising or reviewing any records of those organizations relating to the senior notes.

Payments on the senior notes represented by the global notes will be made to DTC or its nominee, as the case may be, as the registered owner thereof. We expect that DTC or its nominee, upon receipt of any payment

on the senior notes represented by a global note, will credit participants’ accounts with payments in amounts proportionate to their respective beneficial interests in the global note as shown in the records of DTC or its nominee. We also expect that payments by participants to owners of beneficial interests in the global note held through such participants will be governed by standing instructions and customary practice as is now the case with securities held for the accounts of customers registered in the names of nominees for such customers. The participants will be responsible for those payments.

Distributions on the senior notes held beneficially through Clearstream will be credited to cash accounts of its customers in accordance with its rules and procedures, to the extent received by the U.S. depositary for Clearstream.

Securities clearance accounts and cash accounts with the Euroclear Operator are governed by the Terms and Conditions Governing Use of Euroclear and the related Operating Procedures of the Euroclear System, and applicable Belgian law (collectively, the “Terms and Conditions”). The Terms and Conditions govern transfers of securities and cash within Euroclear, withdrawals of securities and cash from Euroclear, and receipts of payments with respect to securities in Euroclear. All securities in Euroclear are held on a fungible basis without attribution of specific certificates to specific securities clearance accounts. The Euroclear Operator acts under the Terms and Conditions only on behalf of Euroclear participants and has no record of or relationship with persons holding through Euroclear participants.

Distributions on the senior notes held beneficially through Euroclear will be credited to the cash accounts of its participants in accordance with the Terms and Conditions, to the extent received by the U.S. depositary for Euroclear.

Initial settlement for the senior notes will be made in immediately available funds. Secondary market trading between DTC participants will occur in the ordinary way in accordance with DTC rules and will be settled in immediately available funds. Secondary market trading between Clearstream customers and/or Euroclear participants will occur in the ordinary way in accordance with the applicable rules and operating procedures of Clearstream and Euroclear, as applicable, and will be settled using the procedures applicable to conventional eurobonds in immediately available funds.

Cross-market transfers between persons holding directly or indirectly through DTC, on the one hand, and directly or indirectly through Clearstream customers or Euroclear participants, on the other, will be effected through DTC in accordance with DTC rules on behalf of the relevant European international clearing system by the U.S. depositary; however, such cross-market transactions will require delivery of instructions to the relevant European international clearing system by the counterparty in such system in accordance with its rules and procedures and within its established deadlines (European time). The relevant European international clearing system will, if the transaction meets its settlement requirements, deliver instructions to the U.S. depositary to take action to effect final settlement on its behalf by delivering or receiving the senior notes in DTC, and making or receiving payment in accordance with normal procedures for same-day funds settlement applicable to DTC. Clearstream customers and Euroclear participants may not deliver instructions directly to their U.S. depositaries.

Because of time-zone differences, credits of the senior notes received in Clearstream or Euroclear as a result of a transaction with a DTC participant will be made during subsequent securities settlement processing and dated the business day following the DTC settlement date. Such credits or any transactions in the senior notes settled during such processing will be reported to the relevant Clearstream customers or Euroclear participants on such business day. Cash received in Clearstream or Euroclear as a result of sales of the senior notes by or through a Clearstream customer or a Euroclear participant to a DTC participant will be received with value on the DTC settlement date but will be available in the relevant Clearstream or Euroclear cash account only as of the business day following settlement in DTC.

Although DTC, Clearstream and Euroclear have agreed to the foregoing procedures to facilitate transfers of the senior notes among participants of DTC, Clearstream and Euroclear, they are under no obligation to perform or continue to perform such procedures and such procedures may be changed or discontinued at any time.

We will issue certificated notes to each person that DTC identifies as the beneficial owner of the senior notes represented by a global note upon surrender by DTC of the global note if:

Neither we nor the trustee will be liable for any delay by DTC, its nominee or any direct or indirect participant in identifying the beneficial owners of the senior notes. We and the trustee may conclusively rely on, and will be protected in relying on, instructions from DTC or its nominee for all purposes, including with respect to the registration and delivery, and the respective principal amounts, of the certificated notes to be issued.

The following discussion describes the material U.S. federal income tax consequences of the purchase, ownership and disposition of the senior notes. The discussion set forth below is limited to initial investors who acquire the senior notes at their original issue price and hold the senior notes as capital assets for tax purposes. This discussion does not apply to you if you are a member of a class of holders subject to special rules, such as: banks and other financial institutions, tax-exempt organizations, insurance companies, regulated investment companies, persons that are broker-dealers, traders in securities who elect the mark to market method of accounting for their securities, certain former U.S. citizens or long-term residents, persons holding the senior notes as part of a “straddle,” “hedge,” “conversion transaction” or other integrated transaction for tax purposes, persons that purchase or sell the senior notes as part of a wash sale for tax purposes, or U.S. Holders (as defined below) that have a functional currency other than the U.S. dollar. In addition, this discussion addresses only U.S. federal income taxation and does not discuss all of the tax consequences that may be relevant to you in light of your individual circumstances, including foreign, state or local tax consequences, and tax consequences arising under the Medicare contribution tax on net investment income or the alternative minimum tax.

The discussion below is based upon provisions of the Internal Revenue Code of 1986, as amended (the “Code”), the legislative history thereof, U.S. Treasury regulations thereunder and administrative rulings and judicial decisions thereunder as of the date hereof. Such authorities may be repealed, revoked or modified (including changes in effective dates, and possibly with retroactive effect) so as to result in U.S. federal income tax considerations different from those discussed below.

If a partnership or an entity treated as a partnership for U.S. federal income tax purposes owns any of the senior notes, the tax treatment of a partner or an equity interest owner of such other entity will generally depend upon the status of the person and the activities of the partnership or other entity treated as a partnership.

Partners or other equity interest owners of a partnership or other entity treated as a partnership for U.S. federal income tax purposes should consult their own tax advisors with regard to the U.S. federal income tax treatment of an investment in the senior notes.

PLEASE CONSULT YOUR OWN TAX ADVISOR CONCERNING THE CONSEQUENCES OF OWNING THESE NOTES IN YOUR PARTICULAR CIRCUMSTANCES UNDER THE CODE AND THE LAWS OF ANY OTHER TAXING JURISDICTION.

This subsection describes the tax consequences to a U.S. Holder. You are a U.S. Holder if you are a beneficial owner of a note and you are, for U.S. federal income tax purposes:

If you are not a U.S. Holder, this subsection does not apply to you and you should refer to “—Non-U.S. Holders” below.

Payments of stated interest on the senior notes generally will be taxable to a U.S. Holder as ordinary interest income at the time such payments are received or accrued, in accordance with the U.S. Holder’s method of accounting for U.S. federal income tax purposes.

Upon the sale, redemption or other taxable disposition of senior notes, a U.S. Holder generally will recognize gain or loss equal to the difference between (1) the amount realized on such disposition (excluding any

amount attributable to accrued but unpaid interest) and (2) such holder’s adjusted tax basis in the senior notes. A U.S. Holder’s adjusted tax basis in the senior notes generally will equal the amount paid for the senior notes. Gain or loss recognized by a U.S. Holder in respect of the disposition generally will be capital gain or loss, and will be long-term capital gain or loss if the U.S. Holder has held the senior notes for more than one year at the time of such disposition. Long-term capital gain of a U.S. Holder that is an individual is generally taxed at preferential rates. The ability of a U.S. Holder to offset capital losses against ordinary income is limited. Notwithstanding the foregoing, any amounts realized in connection with a sale, redemption or other taxable disposition with respect to accrued interest not previously includible in income will be treated as ordinary interest income.

This subsection describes the tax consequences to a Non-U.S. Holder. A Non-U.S. Holder is a beneficial owner of a senior note that is, for U.S. federal income tax purposes:

If you are a U.S. Holder, this subsection does not apply to you.

Subject to the discussions of backup withholding and FATCA below, U.S. withholding tax will generally not be imposed on payments of interest on the senior notes to a Non-U.S. Holder if:

If a Non-U.S. Holder cannot satisfy the requirements described above, then payments of interest made to such holder generally will be subject to U.S. federal withholding tax at the rate of 30%, unless either (i) the Non-U.S. Holder provides the applicable withholding agent with a properly executed IRS Form W-8BEN or W-8BEN-E establishing an exemption from or reduction of the withholding tax under the benefit of an applicable income tax treaty or (ii) the interest is effectively connected with the conduct of a trade or business in the United States and the Non-U.S. Holder satisfies the certification requirements described below.

If a Non-U.S. Holder is engaged in a trade or business in the United States and interest on a senior note is effectively connected with the conduct of that trade or business, the Non-U.S. Holder will be subject to U.S. federal income tax on such interest on a net income basis in generally the same manner as a U.S. Holder, unless an applicable income tax treaty provides otherwise. Unless exempt from net income tax under an applicable income tax treaty, effectively connected interest income generally will not be subject to U.S. federal

withholding tax if the Non-U.S. Holder satisfies certain certification requirements by providing the applicable withholding agent with a properly executed IRS Form W-8ECI or applicable successor form. A Non-U.S. Holder that is treated as a foreign corporation for U.S. federal income tax purposes may also be subject to a branch profits tax at a 30% rate (or lower applicable treaty rate) on its effectively connected earnings and profits, subject to adjustments.

Subject to the discussion of backup withholding below, a Non-U.S. Holder generally will not be subject to U.S. federal income tax on gain realized on the sale, exchange or retirement of a senior note unless:

A Non-U.S. Holder described in the first bullet point will be subject to U.S. federal income tax on such gain on a net income basis in generally the same manner as a United States holder, unless an applicable income tax treaty provides otherwise. A Non-U.S. Holder that is treated as a foreign corporation for U.S. federal income tax purposes may also be subject to a branch profits tax at a 30% rate (or lower applicable treaty rate) on its effectively connected earnings and profits, subject to adjustments. A Non-U.S. Holder described in the second bullet point above generally will be subject to U.S. federal income tax at a flat rate of 30% (unless a lower treaty rate applies) on gain from the disposition, which may be offset by certain U.S.-source capital losses.

Pursuant to sections 1471 through 1474 of the Code, commonly known as the Foreign Account Tax Compliance Act (“FATCA”), a 30% withholding tax (“FATCA withholding”) may be imposed on certain payments to you or to certain foreign financial institutions, investment funds and other non-U.S. persons receiving payments on your behalf if you or such persons fail to comply with certain information reporting requirements. Payments of interest that you receive in respect of the senior notes could be affected by this withholding if you are subject to the FATCA information reporting requirements and fail to comply with them or if you hold notes through a non-U.S. person (e.g., a foreign bank or broker) that fails to comply with these requirements (even if payments to you would not otherwise have been subject to FATCA withholding). These requirements may be modified by the adoption or implementation of an intergovernmental agreement between the United States and another country or by future U.S. Treasury Regulations. Documentation that you provide in order to be treated as FATCA compliant may be reported to the IRS and other tax authorities. You should consult your own tax advisors regarding the relevant U.S. law and other official guidance on FATCA withholding.

Depending on your circumstances, you may be entitled to a refund or credit in respect of some or all of this withholding. However, even if you are entitled to have any such withholding refunded, the required procedures could be cumbersome and significantly delay the holder’s receipt of any amounts withheld.

In general, if you are a noncorporate U.S. Holder, the applicable withholding agent is required to report to the IRS all payments of principal, any premium and interest on your senior notes. In addition, certain payors are required to report to the IRS any payment of proceeds of the sale of your senior notes before maturity within the United States. Additionally, backup withholding would apply to such payments, if you fail to provide an accurate taxpayer identification number, or (in the case of interest payments) you are notified by the IRS that you have failed to report all interest and dividends required to be shown on your federal income tax returns.

In general, if you are a Non-U.S. Holder, the applicable withholding agent is required to report payments of interest on your senior notes on IRS Form 1042-S. Payments of principal, premium or interest made by us and other payors to you would otherwise not be subject to information reporting and backup withholding, provided that the certification requirements described above under “—Non-U.S. Holders—Interest” are satisfied or you otherwise establish an exemption. In addition, payment of the proceeds from the sale of senior notes effected at a U.S. office of a broker will not be subject to backup withholding and information reporting if (i) the payor or

broker does not have actual knowledge or reason to know that you are a U.S. person and (ii) you have furnished to the applicable withholding agent an appropriate IRS Form W-8, an acceptable substitute form or other documentation upon which it may rely to treat the payment as made to a non-U.S. person.

In general, payment of the proceeds from the sale of senior notes effected at a foreign office of a broker will not be subject to information reporting or backup withholding. However, a sale effected at a foreign office of a broker could be subject to information reporting in the same manner as a sale within the United States (and in certain cases may be subject to backup withholding as well) if (i) the broker has certain connections to the United States, (ii) the proceeds or confirmation are sent to the United States or (iii) the sale has certain other specified connections with the United States.

You generally may obtain a refund of any amounts withheld under the backup withholding rules that exceed your income tax liability or a credit against your U.S. federal income tax liability, provided that the required information is timely filed with the IRS.

A fiduciary of a pension, profit-sharing or other employee benefit plan subject to the Employee Retirement Income Security Act of 1974, as amended (“ERISA,” and each such plan, a “Plan”), should consider the fiduciary standards of ERISA in the context of the Plan’s particular circumstances before authorizing an investment in the senior notes. Among other factors, the fiduciary should consider whether the investment would satisfy the prudence and diversification requirements of ERISA and would be consistent with the documents and instruments governing the Plan, and whether the investment would involve a prohibited transaction under ERISA or the Code.

Section 406 of ERISA and Section 4975 of the Code prohibit Plans, as well as individual retirement accounts, Keogh plans and any other plans that are subject to Section 4975 of the Code (also “Plans”), from engaging in certain transactions involving “plan assets” with persons who are “parties in interest” under ERISA or “disqualified persons” under the Code with respect to the Plan. A violation of these prohibited transaction rules may result in excise tax or other liabilities under ERISA or the Code for those persons, unless exemptive relief is available under an applicable statutory, regulatory or administrative exemption. Employee benefit plans that are governmental plans (as defined in Section 3(32) of ERISA), certain church plans (as defined in Section 3(33) of ERISA) and non-U.S. plans (as described in Section 4(b)(4) of ERISA) (“Non-ERISA Arrangements”) are not subject to the requirements of Section 406 of ERISA or Section 4975 of the Code but may be subject to similar provisions under applicable federal, state, local, non-U.S. or other laws (“Similar Laws”).

The acquisition or holding of senior notes by a Plan or any entity whose underlying assets include “plan assets” by reason of any Plan’s investment in the entity (a “Plan Asset Entity”) with respect to which we, certain of our affiliates, the underwriters or certain of their affiliates are or become a party in interest or disqualified person may result in a prohibited transaction under ERISA or Section 4975 of the Code, unless the senior notes are acquired and held pursuant to an applicable exemption. Unum, directly or through its affiliates, or the underwriters, directly or through their affiliates, may be considered a “party in interest” or a “disqualified person” to a large number of plans. The U.S. Department of Labor has issued several prohibited transaction class exemptions, or “PTCEs,” that may provide exemptive relief if required for direct or indirect prohibited transactions that may arise from the purchase or holding of senior notes. These exemptions include PTCE 84-14 (for certain transactions determined by independent qualified professional asset managers), PTCE 90-1 (for certain transactions involving insurance company pooled separate accounts), PTCE 91-38 (for certain transactions involving bank collective investment funds), PTCE 95-60 (for transactions involving certain insurance company general accounts), and PTCE 96-23 (for transactions managed by in-house asset managers). In addition, ERISA Section 408(b)(17) and Section 4975(d)(20) of the Code provide an exemption for the acquisition and disposition of securities offered hereby, provided that neither we nor any of our affiliates have or exercise any discretionary authority or control or render any investment advice with respect to the assets of any Plan involved in the transaction, and provided further that the Plan pays no more and receives no less than “adequate consideration” in connection with the transaction (the “service provider exemption”). There can be no assurance that all of the conditions of any such exemptions will be satisfied.

Because of the foregoing, the senior notes should not be acquired or held by any person investing “plan assets” of any Plan, Plan Asset Entity or Non-ERISA Arrangement, unless such acquisition and holding will not constitute a non-exempt prohibited transaction under ERISA and the Code or a similar violation of any applicable Similar Laws.

Any purchaser or holder of senior notes or any interest therein will be deemed to have represented by its purchase and holding of senior notes offered hereby that either (1) it is not a Plan, a Plan Asset Entity or a Non-ERISA Arrangement and is not purchasing the senior notes on behalf of or with the assets of any Plan, a Plan Asset Entity or Non-ERISA Arrangement or (2) the purchase, holding, and disposition of the senior notes will not constitute or result in a non-exempt prohibited transaction or a similar violation under any applicable Similar Laws.

Due to the complexity of these rules and the penalties that may be imposed upon persons involved in non-exempt prohibited transactions, it is important that fiduciaries or other persons considering purchasing senior notes on behalf of or with the assets of any Plan, a Plan Asset Entity or Non-ERISA Arrangement consult with their counsel regarding the availability of exemptive relief under any of the PTCEs listed above, the service provider exemption or the potential consequences of any purchase or holding under Similar Laws, as applicable. Purchasers of senior notes have exclusive responsibility for ensuring that their purchase and holding of senior notes do not violate the fiduciary or prohibited transaction rules of ERISA or the Code or any similar provisions of Similar Laws. Neither we, the trustee, the underwriters nor any of their respective affiliates is undertaking to provide investment advice, or to give advice in a fiduciary capacity, in connection with the acquisition of any notes by any Benefit Plan Investor. The sale of any senior notes to a Plan, Plan Asset Entity or Non-ERISA Arrangement is in no respect a representation by us or any of our affiliates or representatives, or by the underwriters or any of their affiliates or representatives, that such an investment meets all relevant legal requirements with respect to investments by any such Plans, Plan Asset Entities or Non-ERISA Arrangements generally or any particular Plan, Plan Asset Entity or Non-ERISA Arrangement or that such investment is appropriate for such Plans, Plan Asset Entities or Non-ERISA Arrangements generally or any particular Plan, Plan Asset Entity or Non-ERISA Arrangement.

We are offering the senior notes described in this prospectus supplement through a number of underwriters. Goldman Sachs & Co. LLC, HSBC Securities (USA) Inc., PNC Capital Markets LLC and Truist Securities, Inc. are the representatives of the underwriters. We have entered into a firm commitment underwriting agreement with the underwriters. Subject to the terms and conditions of the underwriting agreement, we have agreed to sell to the underwriters, and each underwriter has severally agreed to purchase, the aggregate principal amount of senior notes listed next to its name in the following table:

The underwriting agreement is subject to a number of terms and conditions and provides that the underwriters must buy all of the senior notes if they buy any of them. The underwriters will sell the senior notes to the public when and if the underwriters buy the senior notes from us.

The underwriters have advised us that they propose initially to offer the senior notes to the public for cash at the public offering price set forth on the cover of this prospectus supplement and may offer the senior notes to certain dealers at such price less a concession not in excess of 0.525% of the principal amount of the senior notes. The underwriters may allow, and such dealers may reallow, a concession not in excess of 0.250% of the principal amount of the senior notes to certain other dealers. After the initial public offering of the senior notes, the public offering price and other selling terms may be changed. The offering of the senior notes by the underwriters is subject to receipt and acceptance and subject to the underwriters’ right to reject any order in whole or in part.

We estimate that our share of the total expenses of the offering, excluding the underwriting discount, will be approximately $1.42 million.

We have agreed to indemnify the underwriters against, or contribute to payments that the underwriters may be required to make in respect of, certain liabilities, including liabilities under the Securities Act of 1933, as amended.

The underwriters have informed us that they expect that delivery of the senior notes will be made against payment therefor on or about the date specified on the cover page of this prospectus supplement, which will be the third business day following the date of pricing of the senior notes (this settlement cycle being referred to as “T+3”). Under Rule 15c6-1 of the Exchange Act, trades in the secondary market generally are required to settle in one business day, unless the parties to any such trade expressly agree otherwise. Accordingly, purchasers who wish to trade senior notes on the date of this prospectus supplement or the next two business days will be required, by virtue of the fact that the senior notes initially will settle in T+3 to specify an alternate settlement cycle at the time of any such trade to prevent a failed settlement. Purchasers of the senior notes who wish to make such trades should consult their own advisor.

The senior notes are a new issue of securities with no established trading market. The senior notes will not be listed on any securities exchange or on any automated dealer quotation system. The underwriters may make a market in the senior notes after completion of the offering, but will not be obligated to do so and may discontinue any market-making activities at any time without notice. No assurance can be given as to the liquidity of the trading market for the senior notes or that an active public market for the senior notes will develop. If an active public market for the senior notes does not develop, the market price and liquidity of the senior notes may be adversely affected.

In connection with the offering of the senior notes, the representatives may engage in transactions that stabilize, maintain or otherwise affect the price of the senior notes. Specifically, the representatives may overallot in connection with the offering, creating a short position. In addition, the representatives may bid for, and

purchase, the senior notes in the open market to cover short positions or to stabilize the price of the senior notes. Any of these activities may stabilize or maintain the market price of the senior notes above independent market levels, but no representation is made hereby of the magnitude of any effect that the transactions described above may have on the market price of the senior notes. The representatives will not be required to engage in these activities, and may engage in these activities, and may end any of these activities, at any time without notice.

The representatives also may impose a penalty bid. This occurs when a particular underwriter repays to the underwriters a portion of the underwriting discount received by it because the representatives have repurchased senior notes sold by or for the account of such underwriter in stabilizing or short covering transactions.

The underwriters and certain of their affiliates have provided from time to time, and may provide in the future, investment and commercial banking, corporate trust and financial advisory services to us and our affiliates in the ordinary course of business, for which they have received and may continue to receive customary fees and commissions.

In addition, in the ordinary course of their business activities, the underwriters and their affiliates may make or hold a broad array of investments and actively trade debt and equity securities (or related derivative securities) and financial instruments (including bank loans) for their own account and for the accounts of their customers. Such investments and securities activities may involve securities and/or instruments of ours or our affiliates. Certain of the underwriters or their affiliates that have a lending relationship with us routinely hedge, and certain other of those underwriters or their affiliates may hedge, their credit exposure to us consistent with their customary risk management policies. Typically, such underwriters or their affiliates would hedge such exposure by entering into transactions which consist of either the purchase of credit default swaps or the creation of short positions in our securities, including potentially the senior notes offered hereby. Any such credit default swaps or short positions could adversely affect future trading prices of the senior notes offered hereby. The underwriters and their affiliates may also make investment recommendations and/or publish or express independent research views in respect of such securities or financial instruments and may hold, or recommend to clients that they acquire, long and/or short positions in such securities and instruments.

Affiliates of PNC Capital Markets LLC and Truist Securities, Inc. are lenders under the Term Loan Facility. As the net proceeds from this offering will be used to fund repayment of up to $350 million aggregate principal amount of outstanding indebtedness under the Term Loan Facility, 5% or more of the net proceeds from this offering will be directed to affiliates of PNC Capital Markets LLC and Truist Securities, Inc. Accordingly, this offering is being conducted in compliance with the provisions of FINRA Rule 5121. None of PNC Capital Markets LLC and Truist Securities, Inc. is permitted to sell the senior notes in this offering to an account over which it exercises discretionary authority without the prior specific written approval of the customer to which the account relates.

The senior notes may be sold only to purchasers purchasing, or deemed to be purchasing, as principal that are accredited investors, as defined in National Instrument 45-106 Prospectus Exemptions or subsection 73.3(1) of the Securities Act (Ontario), and are permitted clients, as defined in National Instrument 31-103 Registration Requirements, Exemptions and Ongoing Registrant Obligations. Any resale of the senior notes must be made in accordance with an exemption from, or in a transaction not subject to, the prospectus requirements of applicable securities laws.

Securities legislation in certain provinces or territories of Canada may provide a purchaser with remedies for rescission or damages if this prospectus supplement and the accompanying prospectus (including any amendment thereto) contains a misrepresentation, provided that the remedies for rescission or damages are exercised by the purchaser within the time limit prescribed by the securities legislation of the purchaser’s province or territory. The purchaser should refer to any applicable provisions of the securities legislation of the purchaser’s province or territory for particulars of these rights or consult with a legal advisor.

Pursuant to section 3A.3 of National Instrument 33-105 Underwriting Conflicts (“NI 33-105”), the underwriters are not required to comply with the disclosure requirements of NI 33-105 regarding underwriter conflicts of interest in connection with this offering.

The senior notes may not be publicly offered in Switzerland and will not be listed on the SIX Swiss Exchange (the “SIX”) or on any other stock exchange or regulated trading facility in Switzerland. This document has been prepared without regard to the disclosure standards for issuance prospectuses under art. 652a or art. 1156 of the Swiss Code of Obligations or the disclosure standards for listing prospectuses under art. 27 ff. of the SIX Listing Rules or the listing rules of any other stock exchange or regulated trading facility in Switzerland. Neither this document nor any other offering or marketing material relating to the senior notes or the offering may be publicly distributed or otherwise made publicly available in Switzerland.

In relation to each member state of the European Economic Area (“EEA”), no senior notes have been offered, sold or otherwise made available or will be offered, sold or otherwise made available to any retail investor in the EEA. For the purposes of this provision:

Consequently, no key information document required by Regulation (EU) No 1286/2014 (as amended, the “PRIIPs Regulation”) for offering or selling the senior notes or otherwise making them available to retail investors in the EEA has been prepared and therefore offering or selling the senior notes or otherwise making them available to any retail investor in the EEA may be unlawful under the PRIIPs Regulation. This prospectus supplement and the accompanying prospectus have been prepared on the basis that any offer of the senior notes in any Member State of the EEA will be made pursuant to an exemption under the Prospectus Regulation from the requirement to publish a prospectus or supplement a prospectus for offers of the senior notes. This prospectus supplement and the accompanying prospectus are not a prospectus for the purposes of the Prospectus Regulation.

In relation to the United Kingdom (“UK”), no senior notes have been offered, sold or otherwise made available or will be offered, sold or otherwise made available to any retail investor in the UK. For the purposes of this provision:

Consequently, no key information document required by the PRIIPs Regulation as it forms part of domestic law by virtue of the EUWA (the “UK PRIIPs Regulation”) for offering or selling the senior notes or otherwise making them available to retail investors in the UK has been prepared and therefore offering or selling the senior notes or otherwise making them available to any retail investor in the UK may be unlawful under the UK PRIIPs Regulation. This prospectus supplement and the accompanying prospectus have been prepared on the basis that any offer of the senior notes in the UK will be made pursuant to an exemption under the UK Prospectus Regulation from the requirement to publish a prospectus or supplement a prospectus for offers of the senior notes. This prospectus supplement and the accompanying prospectus are not a prospectus for the purposes of the UK Prospectus Regulation.

In the UK, this prospectus supplement and the accompanying prospectus are only being distributed to, and are only directed at persons (a) who are “qualified investors” (as defined in the UK Prospectus Regulation), (b) who have professional experience in matters relating to investments falling within Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005 (the “Order”), or (c) who are high net worth companies (or persons to whom it may otherwise be lawfully communicated) falling within Article 49(2)(a) to (d) of the Order (all such persons together being referred to as “relevant persons”). Accordingly, such documents and/or materials are not being distributed to, and must not be passed on to, the general public in the UK. This prospectus supplement and the accompanying prospectus must not be acted on or relied on in the UK by persons who are not relevant persons. In the UK, any investment or investment activity to which this prospectus supplement and the accompanying prospectus relates is only available to, and will be engaged in with, relevant persons only.

Each underwriter has represented and agreed that:

The senior notes (i) have not been offered or sold and will not be offered or sold in Hong Kong, by means of any document, other than (a) to “professional investors” as defined in the Securities and Futures Ordinance (Cap. 571 of the laws of Hong Kong) (the “SFO”) and any rules made thereunder; or (b) in other circumstances which do not result in the document being a “prospectus” as defined in the Companies (Winding Up and Miscellaneous Provisions) Ordinance (Cap. 32 of the Laws of Hong Kong) (the “CO”) or which do not constitute an offer to the public within the meaning of the CO; and (ii) has not issued or had in its possession for the purposes of issue, and will not issue or have in its possession for the purposes of issue, whether in Hong Kong or elsewhere, any advertisement, invitation or document relating to the senior notes, which is directed at, or the contents of which are likely to be accessed or read by, the public of Hong Kong (except if permitted to do so under the securities laws of Hong Kong) other than with respect to the senior notes which are or are intended to be disposed of only to persons outside Hong Kong or only to “professional investors” as defined in the SFO and any rules made thereunder.

The senior notes have not been and will not be registered pursuant to Article 4, Paragraph 1 of the Financial Instruments and Exchange Act. Accordingly, none of the senior notes nor any interest therein may be offered or sold, directly or indirectly, in Japan or to, or for the benefit of, any “resident” of Japan (which term as used

herein means any person resident in Japan, including any corporation or other entity organized under the laws of Japan), or to others for re-offering or resale, directly or indirectly, in Japan or to or for the benefit of a resident of Japan, except pursuant to an exemption from the registration requirements of, and otherwise in compliance with, the Financial Instruments and Exchange Act and any other applicable laws, regulations and ministerial guidelines of Japan in effect at the relevant time.

This prospectus supplement and the accompanying prospectus have not been registered as a prospectus with the Monetary Authority of Singapore. Accordingly, this prospectus and any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of the senior notes may not be circulated or distributed, nor may the senior notes be offered or sold, or be made the subject of an invitation for subscription or purchase, whether directly or indirectly, to persons in Singapore other than (i) to an institutional investor (as defined in Section 4A of the Securities and Futures Act 2001 of Singapore, as modified or amended from time to time (the “SFA”)) pursuant to Section 274 of the SFA, (ii) to an accredited investor (as defined in Section 4A of the SFA) pursuant to and in accordance with the conditions specified in Section 275 of the SFA.

Singapore SFA Product Classification – Solely for the purposes of its obligations pursuant to sections 309B of the SFA and the Securities and Futures (Capital Markets Products) Regulations 2018 (“CMP”), the Issuer has determined, and hereby notifies all relevant persons (as defined in Section 309A(1) of the SFA), that the senior notes are “prescribed capital markets products” (as defined in the CMP) and Excluded Investment Products (as defined in MAS Notice SFA 04-N12: Notice on the Sale of Investment Products and MAS Notice FAA-N16: Notice on Recommendations on Investment Products).

The validity of the senior notes will be passed upon for us by Sullivan & Cromwell LLP, and for the underwriters by Cleary Gottlieb Steen & Hamilton LLP.

The consolidated financial statements of Unum Group and subsidiaries appearing in Unum Group’s Annual Report (Form 10-K) for the year ended December 31, 2023, and the effectiveness of Unum Group’s internal control over financial reporting as of December 31, 2023 have been audited by Ernst & Young LLP, independent registered public accounting firm, as set forth in their reports thereon, included therein, and incorporated herein by reference. Such consolidated financial statements are incorporated herein by reference in reliance upon such reports given on the authority of such firm as experts in accounting and auditing.

We file annual, quarterly and current reports, proxy statements and other information with the SEC. Our SEC filings are available to the public, free of charge, at the SEC’s web site at http://www.sec.gov. The address of the SEC’s web site is provided for the information of prospective investors and the information contained therein is not incorporated by reference in this prospectus supplement or the accompanying prospectus.

We “incorporate by reference” into the accompanying prospectus the information in documents we file with the SEC, which means that we can disclose important information to you by referring to those documents. The information incorporated by reference is considered to be part of the accompanying prospectus and should be read with the same care. When we update the information contained in documents that have been incorporated by reference, by making future filings with the SEC, the information incorporated by reference in the accompanying prospectus is considered to be automatically updated and superseded. In other words, in all cases, if you are considering whether to rely on information contained in this prospectus supplement or information incorporated by reference into the accompanying prospectus, you should rely on the information contained in the document that was filed later. Information contained in this prospectus supplement supplements, modifies or supersedes, as applicable, the information contained in earlier-dated documents incorporated by reference. We incorporate by reference the documents listed below and any additional documents we file with the SEC in the future under Section 13(a), 13(c), 14 or 15(d) of the Exchange Act (other than information in such documents deemed to have been furnished and not filed in accordance with SEC rules) until this offering is completed or terminated:

We will provide you with a copy of the documents containing the information we have incorporated by reference, excluding exhibits to those documents, other than those exhibits to which we specifically refer. You may obtain these documents at no cost by writing or telephoning us at the following address:

This prospectus describes some of the general terms that may apply to the securities and the general manner in which they may be offered. The specific terms of any securities to be offered, and the specific manner in which they may be offered, will be described in a supplement to this prospectus. You should read this prospectus and any prospectus supplement carefully before you invest.

We may offer and sell these securities to or through one or more underwriters, dealers and agents, or directly to purchasers, on a continuous or delayed basis.

Unum Group’s common stock is listed on the New York Stock Exchange and trades under the symbol “UNM.” Unless otherwise stated in an accompanying prospectus supplement, none of the securities offered thereby will be listed on any securities exchange other than Unum Group’s common stock.

Investing in any of our securities involves risk. Please read carefully the section entitled “Risk Factors” on page 2 of this prospectus.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

This prospectus is part of a registration statement that we filed with the Securities and Exchange Commission (“SEC”). We may from time to time offer any combination of the following securities described in this prospectus in one or more offerings:

This prospectus provides you with a general description of the securities we may offer. Each time we sell securities, we will provide a prospectus supplement containing specific information about the terms of the securities being offered. A prospectus supplement may include a discussion of any risk factors or other special considerations applicable to those securities or to us. A prospectus supplement may also add, update or change information in this prospectus. If there is any inconsistency between the information in this prospectus and the applicable prospectus supplement, you should rely on the information in the prospectus supplement. You should read both this prospectus and any prospectus supplement together with additional information described under the heading “WHERE YOU CAN FIND MORE INFORMATION” below.

The registration statement containing this prospectus, including exhibits to the registration statement, provides additional information about us and the securities offered under this prospectus. The registration statement can be read at the SEC website and you may request a copy of these documents, at no cost, as described under the heading “WHERE YOU CAN FIND MORE INFORMATION” below.

You should rely only on the information we have provided in this prospectus and in the applicable prospectus supplement, including the information incorporated by reference. None of us, any underwriters, dealers or agents have authorized anyone to provide you with different information. We are not offering the securities in any state or jurisdiction where the offer is prohibited. You should not assume that the information in this prospectus, any prospectus supplement, any free writing prospectus or any document incorporated by reference, is truthful or complete at any date other than the date of the particular document.

We may sell securities to underwriters who will sell the securities to the public on terms fixed at the time of sale. In addition, the securities may be sold by us directly or through dealers or agents designated from time to time. If we, directly or through agents, solicit offers to purchase the securities, we reserve the sole right to accept and, together with any agents, to reject, in whole or in part, any of those offers.

Any prospectus supplement will contain the names of the underwriters, dealers or agents, if any, together with the terms of the offering, the compensation of those underwriters and the net proceeds to us. Any underwriters, dealers or agents participating in the offering may be deemed “underwriters” within the meaning of the Securities Act of 1933 (the “Securities Act”).

Unless otherwise mentioned or unless the context requires otherwise, all references in this prospectus to “we,” “us,” “our,” or similar references mean Unum Group and its subsidiaries.

When we refer to “you” in this prospectus, we mean those who invest in the securities being offered by this prospectus, whether they are the holders or only indirect owners of those securities. When we refer to “your securities” in this prospectus, we mean the securities in which you will hold a direct or indirect interest. See “LEGAL OWNERSHIP AND BOOK-ENTRY ISSUANCE” for special considerations regarding indirect ownership and global securities.

Investing in our securities involves risks. We urge you to carefully consider the risk factors described in our filings with the SEC that are incorporated by reference in this prospectus and any risk factors set forth in any prospectus supplement, pricing supplement or free writing prospectus used in connection with an offering of our securities, as well as the information relating to us identified herein in “Cautionary Statement Regarding Forward-Looking Statements,” before making an investment decision.

We file annual, quarterly and current reports, proxy statements and other information with the SEC. Our SEC filings are available to the public, free of charge, at the SEC’s website at www.sec.gov. The address of the SEC’s website is provided for the information of prospective investors, and the information contained therein is not incorporated by reference in this prospectus.

This prospectus is part of a registration statement filed with the SEC and does not contain all of the information in the registration statement. The full registration statement may be obtained from the SEC as indicated above.

The SEC allows us to “incorporate by reference” into this prospectus the information in documents we file with the SEC, which means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is considered to be a part of this prospectus and should be read with the same care. When we update the information contained in documents that have been incorporated by reference, by making future filings with the SEC, the information incorporated by reference into this prospectus is considered to be automatically updated and superseded. In other words, in all cases, if you are considering whether to rely on information contained in this prospectus or information incorporated by reference into this prospectus, you should rely on the information contained in the document that was filed later. We incorporate by reference the documents listed below (excluding any portions of such documents that may have been “furnished” but not “filed” for purposes of the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) and any additional documents we file with the SEC in the future under Sections 13(a), 13(c), 14, or 15(d) of the Exchange Act, until all of the offerings by means of this prospectus are complete:

You may obtain a copy of our SEC filings incorporated by reference into this prospectus at our website, www.unum.com. All other information contained on our website is not a part of this prospectus, and any references to our website are intended to be inactive textual references only. You may also request a copy of these filings, at no cost, by writing to or telephoning us at the following address:

The Private Securities Litigation Reform Act of 1995 (the “Act”) provides a “safe harbor” to encourage companies to provide prospective information, as long as those statements are identified as forward-looking and are accompanied by meaningful cautionary statements identifying important factors that could cause actual results to differ materially from those included in the forward-looking statements. Certain information contained in this prospectus, the applicable prospectus supplement or information incorporated by reference into this prospectus, or in any other written or oral statements made by us in communications with the financial community or contained in documents filed with the SEC, may be considered forward-looking statements within the meaning of the Act. Forward-looking statements are those not based on historical information, but rather relate to our outlook, future operations, strategies, financial results, or other developments. Forward-looking statements speak only as of the date made. We undertake no obligation to update these statements, even if made available on our website or otherwise. These statements may be made directly in this prospectus or the applicable prospectus supplement or may be made part of this prospectus by reference to other documents filed by us with the SEC, a practice which is known as “incorporation by reference.” You can find many of these statements by looking for words such as “will,” “may,” “should,” “could,” “believes,” “expects,” “anticipates,” “estimates,” “plans,” “assumes,” “intends,” “projects,” “goals,” “objectives,” or similar expressions in this prospectus, the applicable prospectus supplement or in documents incorporated herein.

These forward-looking statements are subject to numerous assumptions, risks, and uncertainties, many of which are beyond our control. We caution readers that the following factors, in addition to other factors mentioned from time to time, may cause actual results to differ materially from those contemplated by the forward-looking statements:

For further discussion of risks and uncertainties which could cause actual results to differ from those contained in the forward-looking statements, see Part I, Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2022 and the accompanying prospectus supplement.

All subsequent written and oral forward-looking statements attributable to us or any person acting on our behalf are expressly qualified in their entirety by the cautionary statements contained or referred to in this section.

Unum Group, a Delaware general business corporation, and its insurance and non-insurance subsidiaries, which collectively with Unum Group we refer to as the Company, operate in the United States, the United Kingdom, Poland, and, to a limited extent, in certain other countries. The principal operating subsidiaries in the United States are Unum Life Insurance Company of America, Provident Life and Accident Insurance Company, The Paul Revere Life Insurance Company, Colonial Life & Accident Insurance Company, Starmount Life Insurance Company, in the United Kingdom, Unum Limited, and in Poland, Unum Zycie TUiR S.A. (Unum Poland). We are a leading provider of financial protection benefits in the United States and the United Kingdom. Our products include disability, life, accident, critical illness, dental and vision, and other related services. We market our products primarily through the workplace.

We have three principal operating business segments: Unum US, Unum International, and Colonial Life. Our other segments are the Closed Block and Corporate segments.

Unless otherwise specified in the applicable prospectus supplement for any offering of securities, the net proceeds we receive from the sale of these securities will be used for general corporate purposes, which may include:

Pending such use, we may temporarily invest net proceeds in highly liquid assets.

Unless stated otherwise in the applicable prospectus supplement, the following summary outlines the material terms of the senior debt securities and the subordinated debt securities, which we collectively refer to as the “debt securities,” that we may offer from time to time. The specific terms of any debt securities we may offer and the extent, if any, to which these general terms and provisions may or may not apply to the debt securities will be described in the prospectus supplement relating to the particular series of debt securities.

We will issue the senior debt securities under an indenture which we entered into with The Bank of New York Mellon Trust Company, N.A., as trustee, on August 23, 2012, as amended and supplemented. We will issue the subordinated debt securities under an indenture, which we entered into with The Bank of New York Mellon Trust Company, N.A., as trustee, on May 29, 2018. Except for the subordination provisions included in the subordinated indenture, the indentures are substantially identical. The indentures are subject to and governed by the Trust Indenture Act, and we may supplement the indentures from time to time. The following description of the debt securities may not be complete and is subject to and qualified in its entirety by reference to either the senior indenture, as amended and supplemented, or the subordinated indenture relating to the particular series of debt securities, each of which is an exhibit to the registration statement that contains this prospectus. Capitalized terms used but not defined in this description have the meanings given to them in the indentures. Wherever we refer to particular sections or defined terms of the indentures, it is our intent that those sections or defined terms will be incorporated by reference into this prospectus.

The debt securities will be our direct, unsecured obligations. The indebtedness represented by the senior debt securities will rank equally with all of our other unsecured and unsubordinated debt, but will be subordinated to all of our existing and future secured indebtedness, if any. The indebtedness represented by the subordinated debt securities will rank junior in right of payment, under the terms contained in the subordinated indenture, and will be subject to our prior payment in full of our senior debt, all as described under “—Subordination.”

We may issue the debt securities, in one or more series from time to time, as our board of directors may establish by resolution or as we may establish in one or more supplemental indentures. We may issue debt securities with terms different from those of debt securities we previously issued. We may issue debt securities of the same series at more than one time and, unless prohibited by the terms of the series, we may reopen a series for issuances of additional debt securities of the series, without the consent of the holders of the outstanding debt securities of that series. The debt securities may be denominated and payable in foreign currencies or units based on or related to foreign currencies. Special United States federal income tax considerations applicable to any debt securities denominated in foreign currencies will be described in the applicable prospectus supplement.

Each indenture provides that there may be more than one trustee under the indenture, each with respect to one or more series of the debt securities. Any trustee under an indenture may resign or be removed with respect to one or more series of the debt securities, and a successor trustee may be appointed to act with respect to that series. Upon prior written notice, a trustee may be removed by act of the holders of a majority in principal amount of the outstanding debt securities of the series with respect to which the trustee acts as trustee. If two or more persons are acting as trustee with respect to different series of debt securities, each trustee will be a trustee of a trust under the applicable indenture unrelated to the trust administered by any other trustee. Except as otherwise stated in this prospectus, any action described in this prospectus to be taken by each trustee may only be taken by the trustee with respect to the one or more series of debt securities for which it is trustee under the applicable indenture.

You should refer to the applicable prospectus supplement relating to a particular series of debt securities for the specific terms of the debt securities, including, but not limited to:

The debt securities of a series may provide for less than their entire principal amount to be payable if we accelerate the maturity of the debt securities as a result of the occurrence and continuation of an event of default. If this is the case, the debt securities of such series would have what is referred to as “original issue discount.” Any special United States federal income tax, accounting and other considerations applicable to original issue discount securities will be described in the applicable prospectus supplement.

We may issue debt securities of a series from time to time, with the principal amount payable on any principal payment date, or the amount of interest payable on any interest payment date, to be determined by reference to one or more currency exchange rates, commodity prices, equity indices or other factors. Holders of these debt securities may receive a principal amount on any principal payment date, or a payment of interest on any interest payment date, that is greater than or less than the amount of principal or interest otherwise payable on such dates, depending upon the value on the applicable dates of the applicable currency, commodity, equity index or other factors.

Information as to the methods for determining the amount of principal or interest payable on any date, the currencies, commodities, equity indices or other factors to which the amount payable on such date is linked and certain additional tax considerations will be described in the applicable prospectus supplement.

The indentures do not contain any provisions that afford holders of the debt securities protection in the event we engage in a transaction in which we incur or acquire a large amount of additional debt.

Unless the applicable prospectus supplement states otherwise, debt securities we issue in registered form of any series will be issued in denominations of $1,000 and multiples of $1,000. Unless the applicable prospectus supplement states otherwise, debt securities we issue in bearer form will be issued in denominations of $5,000 and multiples of $5,000.

Unless the applicable prospectus supplement states otherwise, the principal of, and any premium, Make-Whole Amount, calculated by us, or interest on, any series of debt securities will be payable in the currency designated in the prospectus supplement at the corporate trust office of the trustee, located at 4655 Salisbury Rd., Suite 300, Jacksonville, Florida 32256 as of the date of this prospectus. At our option, however, payment of interest may be made by check mailed to the address of the person entitled to the interest payment as it appears in the security register for the series or by wire transfer of funds to that person at an account maintained within the United States. We may at any time designate additional paying agents, remove any paying agents, or approve a change in the office through which any paying agent acts, except that we will be required to maintain a paying agent in each place of payment for any series. All monies we pay to a paying agent for the payment of principal of, or any premium, Make-Whole Amount, interest or Additional Amounts on, any debt security which remains unclaimed at the end of two years after the principal, premium or interest has become due and payable will be repaid to us, subject to any applicable law. After this time, the holder of the debt security will be able to look only to us for payment.

Any interest we do not punctually pay on any interest payment date with respect to a debt security will be defaulted interest and will cease to be payable to the holder on the original regular record date and may either:

If the defaulted interest is to be paid on a special record date, notice of the special record date will be mailed to each holder of such debt security not less than ten days before the special record date.

Subject to certain limitations imposed on debt securities issued in book-entry form, debt securities of any series will be exchangeable for other debt securities of the same series and with the same total principal amount and authorized denomination upon surrender of the debt securities at the corporate trust office of the applicable trustee. In addition, subject to certain limitations imposed upon debt securities issued in book-entry form, the debt securities of any series may be surrendered for conversion, transfer or exchange at the corporate trust office of the applicable trustee. Every debt security surrendered for conversion, transfer or exchange will be duly endorsed or accompanied by a written instrument of transfer. There will be no service charge on any transfer or exchange of debt securities, but we may require payment by holders to cover any tax or other governmental charge payable in connection with the transfer or exchange.

If the applicable prospectus supplement refers to us designating a transfer agent (in addition to the applicable trustee) for any series of debt securities, we may at any time remove the transfer agent or approve a change in the location at which the transfer agent acts, except that we will be required to maintain a transfer agent in each place of payment for any series of debt securities. We may at any time designate additional transfer agents with respect to any series of debt securities.

Neither we nor any trustee will be required to do any of the following:

We will issue each debt security in global – i.e., book-entry – form only, unless we specify otherwise in the applicable prospectus supplement. Debt securities in book-entry form will be represented by a global security registered in the name of a depositary or its nominee name, which will be the holder of all the debt securities represented by the global security. Those who own beneficial interests in a global security will do so through participants in the depositary’s securities clearing system, and the rights of these indirect owners will be governed solely by the applicable procedures of the depositary and its participants. We describe book-entry securities below under “LEGAL OWNERSHIP AND BOOK-ENTRY ISSUANCE.”

In addition, we will generally issue each debt security in registered form, without coupons, unless we specify otherwise in the applicable prospectus supplement. If we issue a debt security in bearer form, the applicable prospectus supplement will describe special provisions that apply to such securities.

We may consolidate with, or sell, lease or otherwise transfer all or substantially all of our assets to, or merge with or into, any other corporation or trust or entity, provided that, with respect to any series:

Upon any such consolidation, merger, or sale, the successor corporation formed, or into which we are merged or to which we are sold, shall succeed to, and be substituted for, us under the indentures.

This covenant would not apply to any recapitalization transaction, change of control of us or a transaction in which we incur a large amount of additional debt unless the transactions or change of control included a merger or consolidation or transfer of all or substantially all of our assets. Except as may be described in the applicable prospectus supplement, there are no covenants or other provisions in the indentures providing for a put or increased interest or that would otherwise afford holders of debt securities additional protection in the event of a recapitalization transaction, a change of control of us or a transaction in which we incur or acquire a large amount of additional debt.

Also, if we merge, consolidate or sell our assets substantially as an entirety and the successor is a non-U.S. entity, neither we nor any successor would have any obligation to compensate you for any resulting adverse tax consequences relating to your debt securities.

The following set forth certain covenants applicable to debt securities, any of which may be modified or inapplicable to your debt securities to the extent set forth in the prospectus supplement applicable to your debt securities.

Existence. Except as permitted under “—Merger, Consolidation or Sale” above we will do or cause to be done all things necessary to preserve and keep our legal existence, rights and franchises in full force and effect; provided, however, that we will not be required to preserve any right or franchise if we determine that the preservation of that right or franchise is no longer desirable in the conduct of our business and that its loss is not disadvantageous in any material respect to the holders of any debt securities.

Provision of Financial Information. We will file with the trustee, within 15 days of filing the same with the SEC, copies of our annual reports, quarterly reports and other documents we file with the SEC pursuant to such Section 13 and 15(d) of the Exchange Act, and we will promptly, upon written request and payment of the reasonable cost of duplication and delivery, supply copies of those documents to any prospective holder.

Waiver of Certain Covenants. We may choose not to comply with any term, provision or condition of the foregoing covenants, or with certain other terms, provisions or conditions with respect to the debt securities of a series (except any such term, provision or condition which could not be amended without the consent of all holders of such series), if before or after the time for compliance with the covenant, term, provision or condition, the holders of at least a majority in principal amount of all outstanding debt securities of the series either waive compliance in that instance or generally waive compliance with that covenant or condition. Unless the holders expressly waive compliance with a covenant and the waiver has become effective, our obligations and the duties of the trustee in respect of the term, provision, or condition will remain in full force and effect.

Additional Covenants. Any additional covenants with respect to any series of debt securities will be described in the applicable prospectus supplement.

Except as otherwise described in the applicable prospectus supplement, each of the following “Events of Default” set forth in the indentures will be applicable to each series of debt securities we may issue under those indentures:

If there is a continuing event of default under an indenture with respect to outstanding debt securities of a series, then the applicable trustee or the holders of not less than 25% of the total principal amount of the outstanding debt securities of that series, voting as a single class, may declare immediately due and payable the principal amount or other amount as may be specified in the terms of the debt securities of, and any premium or Make-Whole Amount on all of the debt securities of, that series. However, at any time after a declaration of acceleration with respect to any or all debt securities of a series then outstanding has been made, but before a judgment or decree for payment of the money due has been obtained by the applicable trustee, the holders of not less than a majority in principal amount of the outstanding debt securities of that series may cancel the acceleration if:

Each indenture also provides that the holders of not less than a majority in principal amount of the applicable outstanding debt securities of any series may waive any past default with respect to those debt securities and its consequences, except a default consisting of:

The trustee is generally required to give notice to the holders of the debt securities of each affected series within 90 days of a default of which the trustee has actual knowledge under the applicable indenture unless the default has been cured or waived. The trustee may withhold a notice of default unless the default relates to:

Each indenture provides that no holder of debt securities of any series may institute a proceeding with respect to the indenture or for any remedy under the indenture, unless the applicable trustee fails to act, for 60 days, after:

This provision will not prevent, however, any holder of debt securities from instituting suit for the enforcement of payment of the principal of, and any premium, Make-Whole Amount, interest or Additional Amounts on, debt securities at their respective due dates.

Subject to provisions in each indenture relating to the trustee’s duties in case of default, the trustee is not under an obligation to exercise any of its rights or powers under any indenture at the request or direction of any holders of any series of debt securities then outstanding, unless the holders have offered to the trustee security or indemnity satisfactory to it. Subject to these provisions for the indemnification of the trustee, the holders of not less than a majority in principal amount of the applicable outstanding debt securities will have the right to direct the time, method and place of conducting any proceeding for any remedy available to the applicable trustee, or of exercising any trust or power conferred upon the trustee. However, the trustee may refuse to follow any direction which is in conflict with any law or the applicable indenture, which may involve the trustee in personal liability or which may be unduly prejudicial to the holders of debt securities of the applicable series not joining in the direction.

Within 120 days after the close of each fiscal year, we must deliver to each trustee a certificate, signed by one of several specified officers, stating such officer’s knowledge of our compliance with all the conditions and covenants under the applicable indenture and, in the event of any noncompliance, specifying such noncompliance and the nature and status of the noncompliance.

Modification and amendment of an indenture may be made only with the consent of the holders of not less than a majority in principal amount of all outstanding debt securities issued under the indenture which are affected by the modification or amendment, voting together as one class. However, no modification or amendment may, without the consent of the holder of each debt security affected, do any of the following:

We and the relevant trustee may modify or amend an indenture, without the consent of any holder of debt securities, for any of the following purposes:

Unless otherwise indicated in the applicable prospectus supplement for a particular series of subordinated debt securities, the following subordinated provisions will apply to the subordinated debt securities.

The subordinated debt securities will be unsecured and subordinated in right of payment to all of our existing and future secured and senior indebtedness. As a result, upon any distribution to our creditors in a liquidation, dissolution, bankruptcy, insolvency or reorganization, the payment of the principal of and interest on the subordinated debt securities will be subordinated to the extent provided in the subordinated indenture in right of payment to the prior payment in full of all our senior debt and our secured debt. Our obligation to make payments of the principal of and interest on the subordinated debt securities will not otherwise be affected.

We may not make payments of principal or interest on the subordinated debt securities at any time we are in default on any payment with respect to our senior debt, or we have defaulted on any of our senior debt resulting in the acceleration of the maturity of the senior debt beyond any applicable grace period, or if there is a judicial proceeding pending with respect to our default on our senior debt and we have received notice of the default. We may resume payments on the subordinated debt securities when the default is cured or waived if the subordination provisions of the subordinated indenture will permit us to do so at that time. After we have paid all of our senior debt in full, holders of subordinated debt securities will still be subrogated to the rights of holders of our senior debt for the amount of distributions otherwise payable to holders of the subordinated debt securities until the subordinated debt securities are paid in full.

Even if the subordination provisions prevent us from making any payment when due on the subordinated debt securities of any series, we will be in default on our obligations under that series if we do not make the payment when due. This means that the trustee under the subordinated debt indenture and the holders of that series can take action against us, but they will not receive any money until the claims of the holders of senior indebtedness have been fully satisfied.

If payment or distribution on account of the subordinated debt securities of any character or security, whether in cash, securities or other property, is received by a holder of any subordinated debt securities, including any applicable trustee, in contravention of any of the terms of the applicable indenture and before all our senior debt has been paid in full, that payment or distribution or security will be received in trust for the benefit of, and must be paid over or delivered and transferred to, holders of our senior debt at the time outstanding in accordance with the priorities then existing among those holders for application to the payment of all senior debt remaining unpaid to the extent necessary to pay all senior debt in full.

Upon payment or distribution of assets to creditors upon insolvency, receivership, conservatorship, reorganization, readjustment of debt, marshalling of assets and liabilities or similar proceedings or any liquidation or winding up of or relating to our company as a whole, whether voluntary or involuntary, the holders of all senior debt securities will first be entitled to receive payment in full before holders of the outstanding subordinated debt securities will be entitled to receive any payment in respect of the principal of, or premium, if any, or interest on, the outstanding subordinated debt securities.

After we have paid in full all sums we owe on our senior debt, the holders of the subordinated debt securities, if so issued, together with the holders of our obligations ranking on a parity with the subordinated debt securities, will be entitled to be paid from our remaining assets the amounts at the time due and owing on the subordinated debt securities and the other obligations. After we have paid in full all sums we owe on the

subordinated debt securities, the holders of the junior subordinated debt securities, together with the holders of our obligations ranking on a parity with the junior subordinated debt securities, will be entitled to be paid from our remaining assets the amounts at the time due and owing on the junior subordinated debt securities and the other obligations. We will make payment on the junior subordinated debt securities before we make any payment or other distribution, whether in cash, property or otherwise, on account of any capital stock or obligations ranking junior to our junior subordinated debt securities.

By reason of this subordination, if we become insolvent, holders of senior debt, as well as certain of our general creditors, may receive more, and holders of subordinated debt securities (including junior subordinated debt securities) may receive less, than our other creditors, including holders of any of our senior debt securities. This subordination will not prevent the occurrence of any event of default under the subordinated debt securities.

Senior debt is defined in the subordinated indenture as the principal, premium, if any, unpaid interest (including interest accruing on or after the filing of any petition in bankruptcy or for reorganization relating to us whether or not a claim for post-filing interest is allowed in such proceeding), fees, charges, expenses, reimbursement and indemnification obligations, and all other amounts payable under or in respect of the types of debt generally described below:

Senior debt will exclude the following:

There is no limit on the amount of senior debt or other debt that we may incur under the indentures.

Unless the terms of a series of debt securities provide otherwise, under each indenture, we may discharge certain obligations to holders of any series of debt securities that have not already been delivered to the applicable trustee for cancellation and that either have become due and payable or will become due and payable within one year (or are scheduled for redemption within one year). We can discharge these obligations by irrevocably depositing with the applicable trustee funds in such currency or currencies in which the debt securities are payable in an amount sufficient to pay the entire indebtedness on the debt securities including the principal of, and any premium, Make-Whole Amount, interest or Additional Amounts payable on, the debt securities to the date of the deposit, if the debt securities have become due and payable or to the stated maturity or redemption date, as the case may be.

In addition, if the terms of the debt securities of a series permit us to do so, we may elect either of the following:

If we choose to defease and discharge our obligations under the covenants, any failure to comply with the obligations imposed on us by the defeased covenants will not constitute a default or an event of default with respect to the debt securities of that series. However, to make either election we must irrevocably deposit with the applicable trustee, in trust, an amount, in the currency or currencies in which the debt securities are payable, or in government obligations, or both, that will provide sufficient funds to pay the principal of, and any premium, Make-Whole Amount, interest or Additional Amounts on, the debt securities, and any mandatory sinking fund or analogous payments on the debt securities, on the relevant scheduled due dates or upon redemption.

We may defease and discharge our obligations as described in the preceding paragraphs only if, among other things:

Unless otherwise provided in the applicable prospectus supplement, if, after we have deposited funds and/or government obligations to effect defeasance or covenant defeasance with respect to debt securities of any series:

Unless otherwise defined in the applicable prospectus supplement, “conversion event” means the cessation of use of:

Unless otherwise described in the applicable prospectus supplement, all payments of principal of, and any premium, Make-Whole Amount, interest or Additional Amounts on, any debt security that is payable in a foreign currency that ceases to be used by its government of issuance will be made in U.S. dollars.

In the event we effect covenant defeasance with respect to any series of debt securities and the debt securities are declared due and payable because of the occurrence of any event of default other than:

The applicable prospectus supplement may describe further provisions, if any, permitting defeasance or covenant defeasance, including any modifications to the provisions described above, with respect to a particular series of debt securities.

The terms on which debt securities of any series are convertible into or exchangeable for our common stock or other securities or property, if any, will be set forth in the applicable prospectus supplement. These terms will include:

The terms may also include calculations pursuant to which the number of shares of our common stock or other securities or property to be received by the holders of debt securities would be determined according to the market price of our common stock or other securities or property as of a time stated in the prospectus supplement. The conversion or exchange price of any debt securities of any series that are convertible into or exchangeable for our common stock may be adjusted for any stock dividends, stock splits, reclassification, combinations or similar transactions, as described in the applicable prospectus supplement.

If so specified in the applicable prospectus supplement, debt securities of any series may be wholly or partially redeemed at our option, at any time. The debt securities may also be subject to optional or mandatory redemption on terms and conditions described in the applicable prospectus supplement.

From and after the time that notice has been given as provided in the indenture, if funds for the redemption of any debt securities called for redemption have been made available on the redemption date, the debt securities will cease to bear interest on the date fixed for redemption specified in the notice, and the only right of the holders of the debt securities will be to receive payment of the redemption price.

The indentures are governed by, and will be construed in accordance with, the laws of the State of New York.

The Bank of New York Mellon Trust Company, N.A. is one of a number of banks with which we and certain of our subsidiaries maintain banking relationships in the ordinary course of business. The Bank of New York Mellon Trust Company, N.A., provides us and certain of our subsidiaries with custodial services in connection with our bond and stock portfolios, serves as trustee under the indentures involving certain of our existing debt securities, and its affiliate, The Bank of New York Mellon, is a lender under our revolving credit facility and also provides us with other general banking services. Upon the occurrence of an event of default or an event which, after notice or lapse of time or both, would become an event of default under a series of senior debt securities or subordinated debt securities, or upon the occurrence of a default under another indenture under which The Bank of New York Mellon Trust Company, N.A. serves as trustee, the trustee may be deemed to have a conflicting interest with respect to the other debt securities as to which we are not in default for purposes of the Trust Indenture Act and, accordingly, may be required to resign as trustee under the applicable indenture. In that event, we would be required to appoint a successor trustee.

The following outlines some of the provisions of the preferred stock that we may offer from time to time. The specific terms of a series of preferred stock will be described in the applicable prospectus supplement relating to that series of preferred stock. The following description of the preferred stock and any description of preferred stock in a prospectus supplement may not be complete and is subject to and qualified in its entirety by reference to the certificate of designations relating to the particular series of preferred stock, which we will file with the SEC in connection with the issuance of any preferred stock.

Under our amended and restated certificate of incorporation, our board of directors is authorized, without stockholder approval, to adopt resolutions providing for the issuance of up to 25,000,000 shares of preferred stock, par value $.10 per share, in one or more series.

For each series of preferred stock the board of directors may fix the voting powers, designations, preferences and rights, and qualifications, limitations and restrictions of the series. The board will fix these terms by resolution adopted before we issue any shares of the series of preferred stock. We may also “reopen” a previously issued series of preferred stock and issue additional preferred stock of that series.

In addition, as described under “DESCRIPTION OF DEPOSITARY SHARES,” we may, instead of offering full shares of any series of preferred stock, offer depositary shares evidenced by depositary receipts, each representing a fraction of a share of the particular series of preferred stock issued and deposited with a depositary. The fraction of a share of preferred stock which each depositary share represents will be set forth in the prospectus supplement relating to the depositary shares.

The prospectus supplement relating to the particular series of preferred stock will contain a description of the specific terms of that series as fixed by the board of directors, including, as applicable:

Subject to the rights of the holders of any series of preferred stock, the number of authorized shares of any series of preferred stock may be increased or decreased, but not below the number of shares of that series then outstanding, by resolution adopted by our board of directors and approved by the affirmative vote of the holders of a majority of the voting power of all outstanding shares of capital stock entitled to vote on the matter, voting together as a single class. No separate vote of the holders of any series of preferred stock is required for an increase or decrease in the number of authorized shares of that series.

When we issue and receive payment for shares of preferred stock, the shares will be fully paid and nonassessable, and for each share issued, a sum equal to the stated value will be credited to our preferred stock account. Unless otherwise specified in the prospectus supplement relating to a particular series of preferred stock, holders of preferred stock will not have any preemptive or subscription rights to acquire more of our stock and each series of preferred stock will rank on a parity in all respects with each other series of preferred stock and prior to our common stock as to dividends and any distribution of our assets.

The rights of holders of the preferred stock offered may be adversely affected by the rights of holders of any shares of preferred stock that may be issued in the future. Our board of directors may cause shares of preferred stock to be issued in public or private transactions for any proper corporate purposes and may include issuances to obtain additional financing in connection with acquisitions, and issuances to officers, directors and employees pursuant to benefit plans. Our board of directors’ ability to issue shares of preferred stock may discourage attempts by others to acquire control of us without negotiation with our board of directors, as it may make it difficult for a person to complete an acquisition of us without negotiating with our board.

If so specified in the applicable prospectus supplement, a series of preferred stock may be redeemable at any time, in whole or in part, at our option or the holders’ option, and may be mandatorily redeemed.

Any restriction on the repurchase or redemption by us of our preferred stock while we are in arrears in the payment of dividends will be described in the applicable prospectus supplement.

Any partial redemptions of preferred stock will be made in a way that our board of directors decides is equitable.

Unless we default in the payment of the redemption price, dividends will cease to accrue after the redemption date of shares of preferred stock called for redemption and all rights of holders of these shares will terminate except for the right to receive the redemption price.

Holders of each series of preferred stock will be entitled to receive cash dividends when, as and if declared by our board of directors out of funds legally available for dividends. The rates and dates of payment of dividends will be set forth in the applicable prospectus supplement relating to each series of preferred stock. Dividends will be payable to holders of record of preferred stock as they appear on our books on the record dates fixed by the board of directors. Dividends on any series of preferred stock may be cumulative or noncumulative.

We may not declare, pay or set apart funds for payment of dividends on a particular series of preferred stock unless full dividends on any other series of preferred stock that ranks equally with or senior to the series of preferred stock have been paid or sufficient funds have been set apart for payment for either of the following:

Partial dividends declared on shares of any series of preferred stock and other series of preferred stock ranking on an equal basis as to dividends will be declared pro rata. A pro rata declaration means that the ratio of dividends declared per share to accrued dividends per share will be the same for both series of preferred stock.

In the event of our liquidation, dissolution or winding-up, holders of each series of our preferred stock will have the right to receive distributions upon liquidation in the amount described in the applicable prospectus supplement relating to each series of preferred stock, plus an amount equal to any accrued and unpaid dividends. These distributions will be made before any distribution is made on the common stock or on any securities ranking junior to the preferred stock upon liquidation, dissolution or winding-up.

If the liquidation amounts payable relating to the preferred stock of any series and any other securities ranking on a parity regarding liquidation rights are not paid in full, the holders of the preferred stock of these series and other securities will have the right to a ratable portion of our available assets, up to the full liquidation preference. Holders of these series of preferred stock or other securities will not be entitled to any other amounts from us after they have received their full liquidation preference.

The holders of shares of preferred stock will have no voting rights, except:

The transfer agent, registrar and dividend disbursement agent for the preferred stock will be stated in the applicable prospectus supplement. The registrar for shares of preferred stock will send notices to stockholders of any meetings at which holders of the preferred stock have the right to elect directors or to vote on any other matter.

The preferred stock will be governed by Delaware law.

The following briefly summarizes the provisions of the depositary shares and depositary receipts that we may issue from time to time and which would be important to holders of depositary receipts, other than pricing and related terms which will be disclosed in the applicable prospectus supplement. The prospectus supplement will also state whether any of the generalized provisions summarized below do not apply to the depositary shares or depositary receipts being offered. The following description and any description in a prospectus supplement may not be complete and is subject to, and qualified in its entirety by reference to the terms and provisions of the deposit agreement which we will file with the SEC in connection with any issuance of depositary shares.

We may offer depositary shares evidenced by depositary receipts. Each depositary receipt represents a fraction of a share, or multiple shares, of the particular series of preferred stock issued and deposited with a depositary. The fraction of a share, or multiple shares, of preferred stock which each depositary share represents will be set forth in the applicable prospectus supplement.

We will deposit the shares of any series of preferred stock represented by depositary shares according to the provisions of a deposit agreement to be entered into between us and a bank or trust company which we will select as our preferred stock depositary. We will name the depositary in the applicable prospectus supplement. Each owner of a depositary share will be entitled to all the rights and preferences of the underlying preferred stock in proportion to the applicable fraction of a share of preferred stock represented by the depositary share. These rights include dividend, voting, redemption, conversion and liquidation rights. The depositary will send the holders of depositary shares all reports and communications that we deliver to the depositary and which we are required to furnish to the holders of depositary shares.

The depositary shares will be evidenced by depositary receipts issued pursuant to the deposit agreement. Depositary receipts will be distributed to anyone who is buying the fractional shares of preferred stock in accordance with the terms of the applicable prospectus supplement.

While definitive engraved depositary receipts (certificates) are being prepared, we may instruct the depositary to issue temporary depositary receipts, which will entitle holders to all the rights of the definitive depositary receipts and be substantially in the same form. The depositary will prepare definitive depositary receipts without unreasonable delay, and we will pay for the exchange of your temporary depositary receipts for definitive depositary receipts.

Unless the related depositary shares have previously been called for redemption, a holder of depositary shares may receive the number of whole shares of the series of preferred stock and any money or other property represented by the holder’s depositary receipts after surrendering the depositary receipts at the corporate trust office of the depositary, paying any taxes, charges and fees provided for in the deposit agreement and complying with any other requirement of the deposit agreement. Partial shares of preferred stock will not be issued. If the surrendered depositary shares exceed the number of depositary shares that represent the number of whole shares of preferred stock the holder wishes to withdraw, then the depositary will deliver to the holder at the same time a new depositary receipt evidencing the excess number of depositary shares. Once the holder has withdrawn the preferred stock, the holder will not be entitled to re-deposit that preferred stock under the deposit agreement or to receive depositary shares in exchange for such preferred stock. We do not expect that there will be any public trading market for withdrawn shares of preferred stock.

The depositary will pay to holders of depositary shares the cash dividends or other cash distributions it receives on preferred stock, after deducting its fees and expenses. Each holder will receive these distributions in proportion to the number of depositary shares owned by the holder. The depositary will distribute only whole U.S. dollars and cents. The depositary will add any fractional cents not distributed to the next sum received for distribution to record holders of depositary shares.

In the event of a non-cash distribution, the depositary will distribute property to the record holders of depositary shares, unless the depositary determines that it is not feasible to make such a distribution. If this occurs, the depositary may, with our approval, sell the property and distribute the net proceeds from the sale to the holders.

The amounts distributed to holders of depositary shares will be reduced by any amounts required to be withheld by the depositary or by us on account of taxes or other governmental charges.

If the series of preferred stock represented by depositary shares is subject to redemption, then we will give the necessary proceeds to the depositary upon redemption of the preferred stock. The depositary will then redeem the depositary shares using the funds they received from us for the preferred stock. The depositary will notify the record holders of the depositary shares to be redeemed not less than 30 days nor more than 60 days before the date fixed for redemption at the holders’ addresses appearing in the depositary’s books. The redemption price per depositary share will be equal to the redemption price payable per share for the applicable series of the preferred stock and any other amounts per share payable with respect to the preferred stock multiplied by the fraction of a share of preferred stock represented by one depositary share. Whenever we redeem shares of preferred stock held by the depositary, the depositary will redeem the depositary shares representing the shares of preferred stock on the same day. If fewer than all the depositary shares of a series are to be redeemed, the depositary shares will be selected by lot or ratably or by any other equitable methods as the depositary will decide.

After the date fixed for redemption, the depositary shares called for redemption will no longer be considered outstanding. Therefore, all rights of holders of the depositary shares will cease, except that the holders will still be entitled to receive any cash payable upon the redemption and any money or other property to which the holder was entitled at the time of redemption. To receive this amount or other property, the holders must surrender the depositary receipts evidencing their depositary shares to the depositary. Any funds that we deposit with the depositary for any depositary shares that the holders fail to redeem will be returned to us after a period of two years from the date we deposit the funds.

Upon receipt of notice of any meeting at which the holders of preferred stock represented by depositary shares are entitled to vote, the depositary will notify holders of depositary shares of the upcoming vote and arrange to deliver our voting materials to the holders. The record date for determining holders of depositary shares that are entitled to vote will be the same as the record date for the preferred stock. The materials the holders will receive will (1) describe the matters to be voted on and (2) explain how the holders, on a certain date, may instruct the depositary to vote the shares of preferred stock underlying the depositary shares. For instructions to be valid, the depositary must receive them on or before the date specified. The depositary will try, as far as practical, to vote the shares as instructed by the holder. We will take all reasonable actions requested by the depositary in order to enable it to vote as a holder has instructed. If any holder does not instruct the depositary how to vote the holder’s shares, the depositary will abstain from voting those shares or may vote them proportionately with instructions received.

If the prospectus supplement relating to the depositary shares states that the deposited preferred stock is convertible or exercisable or exchangeable, the following will apply. The depositary will convert or exchange all depositary shares on the same day that the preferred stock underlying the depositary shares is converted or exchanged. In order for the depositary to do so, we will need to deposit the other preferred stock, common stock or other securities into which the preferred stock is to be converted or for which it will be exchanged.

The exchange or conversion rate per depositary share will be equal to:

The depositary shares, as such, cannot be converted or exchanged into other preferred stock, common stock, securities of another issuer or any other securities or property of us. Nevertheless, if so specified in the applicable prospectus supplement, a holder of depositary shares may be able to surrender the depositary receipts to the depositary with written instructions asking the depositary to instruct us to convert or exchange the preferred stock represented by the depositary shares into other shares of our preferred stock or common stock or to exchange the preferred stock for securities of another issuer. If the depositary shares carry this right, we would agree that, upon the payment of any applicable fees, we will cause the conversion or exchange of the preferred stock using the same procedures as we use for the delivery of preferred stock. If a holder is only converting part of the depositary shares represented by a depositary receipt, new depositary receipts will be issued for any depositary shares that are not converted or exchanged.

We may agree with the depositary to amend the deposit agreement and the form of depositary receipt without consent of the holder at any time. However, if the amendment adds or increases fees or charges, other than any change in the fees of any depositary registrar or transfer agent, or prejudices an important right of holders, it will become effective only with the approval of holders of at least a majority of the affected depositary shares then outstanding. If an amendment becomes effective, holders are deemed to agree to the amendment and to be bound by the amended deposit agreement if they continue to hold their depositary receipts.

The deposit agreement automatically terminates if:

We may also terminate the deposit agreement at any time we wish. If we do so, the depositary will give notice of termination to the holders not less than 30 days before the termination date. Once depositary receipts are surrendered to the depositary, it will send to each holder the number of whole or fractional shares of the series of preferred stock underlying that holder’s depositary receipts.

We will pay the fees, charges and expenses of the depositary provided in the deposit agreement to be payable by us. Holders of depositary receipts will pay any taxes and governmental charges and any charges provided in the deposit agreement to be payable by them. If the depositary incurs fees, charges or expenses for which it is not otherwise liable at the election of a holder of a depositary receipt or other person, that holder or other person will be liable for those fees, charges and expenses.

The deposit agreement will limit our obligations and the obligations of the depositary. It will also limit our liability and the liability of the depositary as follows:

In the deposit agreement, we and the depositary will agree to indemnify each other under certain circumstances.

The depositary may resign at any time by notifying us of its election to do so. In addition, we may remove the depositary at any time. The resignation or removal will take effect when we appoint a successor depositary and it accepts the appointment. We must appoint the successor depositary within 60 days after delivery of the notice of resignation or removal.

We may issue preferred stock in book-entry form. Preferred stock in book-entry form will be represented by a global security registered in the name of a depositary, which will be the holder of all the shares of preferred stock represented by the global security. Those who own beneficial interests in shares of preferred stock will do so through participants in the depositary’s system, and the rights of these indirect owners will be governed solely by the applicable procedures of the depositary and its participants. However, beneficial owners of any preferred stock in book-entry form will have the right to obtain their shares in non-global form. We describe book-entry securities below under “LEGAL OWNERSHIP AND BOOK-ENTRY ISSUANCE.” All preferred stock will be issued in registered form.

We will issue depositary shares in book-entry form, to the same extent as we describe above for preferred stock. Depositary shares will be issued in registered form.

The following briefly summarizes the provisions of our amended and restated certificate of incorporation and amended and restated bylaws that would be important to holders of our common stock. The following description may not be complete and is subject to, and qualified in its entirety by reference to, the terms and provisions of our amended and restated certificate of incorporation and amended and restated bylaws which are exhibits to the registration statement which contains this prospectus.

Under our amended and restated certificate of incorporation, we are authorized to issue a total of 725,000,000 shares of common stock having a par value of $.10 per share. As of March 31, 2023, 197,424,437 shares of common stock were outstanding. All outstanding shares of common stock are fully paid and nonassessable. The common stock is listed on the New York Stock Exchange and trades under the symbol “UNM.”

Holders of common stock do not have any conversion, redemption, preemptive or cumulative voting rights. In the event of our dissolution, liquidation or winding-up, common stockholders will share ratably in any assets remaining after all creditors are paid in full, including holders of our debt securities, and after the liquidation preference of holders of preferred stock has been satisfied.

Holders of common stock are entitled to participate equally in dividends when the board of directors declares dividends on shares of common stock out of funds legally available for dividends. The rights of holders of common stock to receive dividends are subject to the preferences of holders of preferred stock.

Holders of common stock are entitled to one vote for each share held of record on all matters voted on by stockholders, including the election of directors.

In the event of our liquidation, dissolution or winding-up, holders of common stock have the right to a ratable portion of assets remaining after satisfaction in full of the prior rights of our creditors, all liabilities, and the total liquidation preferences of any outstanding shares of preferred stock.

Our amended and restated certificate of incorporation and amended and restated bylaws, and certain portions of Delaware law, contain certain provisions that may have an anti-takeover effect.

Special Meetings of Stockholders. A special meeting of our stockholders may be called only by the chairman of the board of directors, the chief executive officer, the president, or the lead independent director or by the secretary at the direction of a majority of the board or upon the written request(s) of one or more stockholders of record who own in the aggregate not less than 25% of the total number of outstanding shares of capital stock entitled to vote on the item(s) of business to be brought before the proposed special meeting as of the date of the request(s).

Advance Notice Requirements for Nomination of Directors and Presentation of New Business at Meetings. Our amended and restated bylaws establish advance notice procedures for stockholder proposals concerning nominations for election to the board of directors and new business to be brought before meetings of stockholders. These procedures require that notice of such stockholder proposals must be timely given in writing to our corporate secretary prior to the meeting at which the action is to be taken. To be timely, we must receive the notice at our principal executive offices within certain dates prior to the anniversary date of the annual meeting of stockholders before the one in which the stockholder proposal is to be considered. The notice must contain information required by the amended and restated bylaws. These provisions make it procedurally more difficult for a stockholder to place a proposed nomination or new business proposal on the meeting agenda and therefore may reduce the likelihood that a stockholder will seek to take independent action to replace directors or with respect to other matters that are not supported by management.

Action of Stockholders Without a Meeting. Any action of our stockholders may be taken at a meeting only and may not be taken by written consent.

Delaware Anti-Takeover Law. Section 203 of the Delaware General Corporation Law generally prohibits a publicly held Delaware corporation, such as our company, from engaging in a business combination, such as mergers, sales and leases of assets, issuances of securities and similar transactions by a corporation or subsidiary with an interested stockholder including a person or group who beneficially owns 15% or more of the corporation’s voting stock for a period of three years following the date the person became an interested stockholder, unless (with certain exceptions) the business combination or the transaction in which the person became an interested stockholder is approved in a prescribed manner.

The provisions described above may discourage attempts by others to acquire control of us without negotiation with our board of directors. This enhances our board of directors' ability to attempt to promote the interests of all of our stockholders. However, to the extent that these provisions make us a less attractive takeover candidate, they may not always be in our best interests or in the best interests of our stockholders. None of these provisions is the result of any specific effort by a third party to accumulate our securities or to obtain control of us by means of merger, tender offer, solicitation in opposition to management or otherwise.

Most states, including the states in which our insurance company subsidiaries are domiciled, have laws and regulations that require regulatory approval of a change in control of an insurer or an insurer’s holding company. Where such laws and regulations apply to us and our insurance company subsidiaries, there can be no effective change in control unless the person seeking to acquire control has filed a statement with specified information with the insurance regulators and has obtained prior approval for the proposed change in control from such regulators. The usual measure for a presumptive change in control pursuant to these laws is the acquisition of

10% or more of the voting stock of an insurance company or its parent, although this presumption is rebuttable. Consequently, a person may not acquire, including by purchases in this offering, 10% or more of our common stock without the prior approval of the insurance regulators in the states in which we and our insurance company subsidiaries are domiciled.

The transfer agent and registrar for shares of the common stock is Computershare Investor Services.

We may issue warrants to purchase senior debt securities, subordinated debt securities, preferred stock, depositary shares, common stock or any combination of these securities and these warrants may be issued independently or together with any underlying securities and may be attached to or separate from the underlying securities. We will issue each series of warrants under a separate warrant agreement to be entered into between us and a warrant agent. The warrant agent will act solely as our agent in connection with the warrants of such series and will not assume any obligation or relationship of agency for or with holders or beneficial owners of warrants. The following outlines some of the general terms and provisions of the warrants. Further material terms of the warrants and the applicable warrant agreement will be stated in the applicable prospectus supplement. The following description and any description of the warrants in a prospectus supplement may not be complete and is subject to and qualified in its entirety by reference to the terms and provisions of the warrant agreement which we will file with the SEC in connection with any issuance of warrants.

The applicable prospectus supplement will describe the terms of any warrants, including the following:

Warrant certificates may be exchanged for new warrant certificates of different denominations, and warrants may be exercised at the warrant agent’s corporate trust office or any other office indicated in the applicable prospectus supplement. Prior to the exercise of their warrants, holders of warrants exercisable for debt securities will not have any of the rights of holders of the debt securities purchasable upon such exercise and will not be entitled to payments of principal (or premium, if any) or interest, if any, on the debt securities purchasable upon such exercise. Prior to the exercise of their warrants, holders of warrants exercisable for shares of preferred stock or common stock or for depositary shares will not have any rights of holders of the preferred stock, common stock or depositary shares purchasable upon such exercise and will not be entitled to dividend payments, if any, or voting rights of the preferred stock, common stock or depositary shares purchasable upon such exercise.

A warrant will entitle the holder to purchase for cash an amount of securities at an exercise price that will be stated in, or that will be determinable as described in, the applicable prospectus supplement. Warrants may be exercised at any time up to the close of business on the expiration date set forth in the applicable prospectus supplement. After the close of business on the expiration date, unexercised warrants will become void.

Warrants may be exercised as set forth in the applicable prospectus supplement. Upon receipt of payment and the warrant certificate properly completed and duly executed at the corporate trust office of the warrant agent or any other office indicated in the prospectus supplement, we will, as soon as practicable, forward the securities purchasable upon such exercise. If less than all of the warrants represented by such warrant certificate are exercised, a new warrant certificate will be issued for the remaining warrants.

The holders of warrants, without the consent of the warrant agent, may, on their own behalf and for their own benefit, enforce, and may institute and maintain any suit, action or proceeding against us to enforce their rights to exercise and receive the securities purchasable upon exercise of their warrants. Unless otherwise stated in the applicable prospectus supplement, each issue of warrants and the applicable warrant agreement will be governed by the laws of the State of New York.

We may issue stock purchase contracts, representing contracts obligating holders to purchase from or sell to us, and obligating us to purchase from or sell to the holders, a specified or variable number of shares of our common stock, preferred stock or depositary shares, as applicable, at a future date or dates. The price per share of common stock, preferred stock or depositary shares, as applicable, may be fixed at the time the stock purchase contracts are entered into or may be determined by reference to a specific formula contained in the stock purchase contracts. Any stock purchase contract may include anti-dilution provisions to adjust the number of shares to be delivered pursuant to such stock purchase contract upon the occurrence of certain events. We may issue the stock purchase contracts in such amounts and in as many distinct series as we wish.

The stock purchase contracts may be entered into separately or as a part of units consisting of a stock purchase contract and a beneficial interest in other securities described in this prospectus or of third parties, including U.S. Treasury securities. The stock purchase contracts may require us to make periodic payments to holders of the stock purchase contracts, or vice versa, and such payments may be unsecured or prefunded and may be paid on a current or on a deferred basis. The stock purchase contracts may require holders to secure their obligations under those contracts in a specified manner.

The applicable prospectus supplement may contain, where applicable, the following information about the stock purchase contracts issued under it:

The applicable prospectus supplement will describe the material terms of any stock purchase contracts. The preceding description and any description of stock purchase contracts in the applicable prospectus supplement does not purport to be complete and is subject to and is qualified in its entirety by reference to the stock purchase contract agreement and, if applicable, collateral arrangements and depositary arrangements relating to such stock purchase contracts.

We may issue units comprised of one or more of the other securities described in this prospectus in any combination. Units may also include debt obligations of third parties, such as U.S. Treasury securities. Each unit will be issued so that the holder of the unit is also the holder of each security included in the unit. Thus, the holder of a unit will have the rights and obligations of a holder of each included security. The unit agreement under which a unit is issued may provide that the securities included in the unit may not be held or transferred separately at any time or at any time before a specified date.

The applicable prospectus supplement may describe:

The applicable prospectus supplement will describe the material terms of any units. The preceding description and any description of units in the applicable prospectus supplement does not purport to be complete and is subject to and is qualified in its entirety by reference to the unit agreement and, if applicable, collateral arrangements and depositary arrangements relating to such units.

In this section, we describe special considerations that will apply to registered securities issued in global – i.e., book-entry – form. First, we describe the differences between legal ownership and indirect ownership of registered securities. Then we describe special provisions that apply to global securities.

Each debt security, warrant, purchase contract, unit, share of preferred stock and depositary share in registered form will be represented either by a certificate issued in definitive form to a particular investor or by one or more global securities representing the entire issuance of securities. We refer to those who have securities registered in their own names, on the books that we or the trustee maintain for this purpose, as the “holders” of those securities. These persons are the legal holders of the securities. We refer to those who, indirectly through others, own beneficial interests in securities that are not registered in their own names as indirect owners of those securities. As we discuss below, indirect owners are not legal holders, and investors in securities issued in book-entry form or in street name will be indirect owners.

We will issue each security in book-entry form only, unless otherwise specified in the applicable prospectus supplement. This means securities will be represented by one or more global securities registered in the name of a financial institution that holds them as depositary on behalf of other financial institutions that participate in the depositary’s book-entry system. These participating institutions, in turn, hold beneficial interests in the securities on behalf of themselves or their customers.

Under each indenture, only the person in whose name a security is registered is recognized as the holder of that security. Consequently, for securities issued in global form, we will recognize only the depositary as the holder of the securities and we will make all payments on the securities, including deliveries of any property other than cash, to the depositary. The depositary passes along the payments it receives to its participants, which in turn pass the payments along to their customers who are the beneficial owners. The depositary and its participants do so under agreements they have made with one another or with their customers; they are not obligated to do so under the terms of the securities.

As a result, investors will not own securities directly. Instead, they will own beneficial interests in a global security, through a bank, broker or other financial institution that participates in the depositary’s book-entry system or holds an interest through a participant. As long as the securities are issued in global form, investors will be indirect owners, and not holders, of the securities.

In the future, we may terminate a global security or issue securities initially in non-global form. In these cases, investors may choose to hold their securities in their own names or in street name. Securities held by an investor in street name would be registered in the name of a bank, broker or other financial institution that the investor chooses, and the investor would hold only a beneficial interest in those securities through an account he or she maintains at that institution.

For securities held in street name, we will recognize only the intermediary banks, brokers and other financial institutions in whose names the securities are registered as the holders of those securities and we will make all payments on those securities, including deliveries of any property other than cash, to them. The institutions pass along the payments they receive to their customers who are the beneficial owners, but only because they agree to do so in their customer agreements or because they are legally required to do so. Investors who hold securities in street name will be indirect owners, not holders, of those securities.

Our obligations, as well as the obligations of the trustee under any indenture and the obligations, if any, of any warrant agents and unit agents and any other third parties employed by us, the trustee or any of those agents, run only to the holders of the securities. We do not have obligations to investors who hold beneficial interests in global securities, in street name or by any other indirect means. This will be the case whether an investor chooses to be an indirect owner of a security or has no choice because we are issuing the securities only in global form.

For example, once we make a payment or give a notice to the holder, we will have no further responsibility for that payment or notice even if that holder is required, under agreements with depositary participants or customers or by law, to pass it along to the indirect owners but does not do so. Similarly, if we want to obtain the approval of the holders for any purpose – e.g., to amend the indenture for a series of debt securities or warrants or the warrant agreement for a series of warrants or to relieve us of the consequences of a default or of our obligation to comply with a particular provision of an indenture – we would seek the approval only from the holders, and not the indirect owners, of the relevant securities. Whether and how the holders contact the indirect owners is up to the holders.

If you hold securities through a bank, broker or other financial institution, either in book-entry form or in street name, you should check with your own institution to find out:

Each security issued in book-entry form will be represented by a global security that we deposit with and register in the name of one or more financial institutions or clearing systems, or their nominees, which we select. A financial institution or clearing system that we select for any security for this purpose is called the “depositary” for that security. A security will usually have only one depositary but it may have more.

Each series of securities will have one or more of the following as the depositaries:

The depositaries named above may also be participants in one another’s clearing systems. Thus, for example, if DTC is the depositary for a global security, investors may hold beneficial interests in that security

through Euroclear or Clearstream, as DTC participants. If your securities are issued in the form of global securities, the depositary or depositaries for your securities will be named in the applicable prospectus supplement; if none is named, the depositary will be DTC.

A global security may represent one or any other number of individual securities. Generally, all securities represented by the same global security will have the same terms. We may, however, issue a global security that represents multiple securities of the same kind, such as debt securities, that have different terms and are issued at different times. We call this kind of global security a “master global security.” The applicable prospectus supplement will not indicate whether your securities are represented by a master global security.

A global security may not be transferred to or registered in the name of anyone other than the depositary or its nominee, unless special termination situations arise. We describe those situations below under “—Holder’s Option to Obtain a Non-Global Security; Special Situations When a Global Security Will Be Terminated.” If termination occurs, we may issue the securities through another book-entry clearing system or decide that the securities may no longer be held through any book-entry clearing system.

The depositary, or its nominee, will be the sole registered owner and holder of all securities represented by a global security, and investors will be permitted to own only indirect interests in a global security. Indirect interests must be held by means of an account with a broker, bank or other financial institution that in turn has an account with the depositary or with another institution that does. Thus, an investor whose security is represented by a global security will not be a holder of the security, but only an indirect owner of an interest in the global security.

As an indirect owner, an investor’s rights relating to a global security will be governed by the account rules of the depositary and those of the investor’s financial institution or other intermediary through which it holds its interest (e.g., Euroclear or Clearstream, if DTC is the depositary), as well as general laws relating to securities transfers. We do not recognize this type of investor or any intermediary as a holder of securities and instead deal only with the depositary that holds the global security.

If securities are issued only in the form of a global security, an investor should be aware of the following:

If we issue any series of securities in book-entry form but we choose to give the beneficial owners of that series the right to obtain non-global securities, any beneficial owner entitled to obtain non-global securities may do so by following the applicable procedures of the depositary, any transfer agent or registrar for that series and that owner’s bank, broker or other financial institution through which that owner holds its beneficial interest in the securities. For example, in the case of a global security representing preferred stock or depositary shares, a beneficial owner will be entitled to obtain a non-global security representing its interest by making a written request to the transfer agent or other agent designated by us. If you are entitled to request a non-global certificate and wish to do so, you will need to allow sufficient lead time to enable us or our agent to prepare the requested certificate.

In addition, in a few special situations described below, the global security will be terminated and interests in it will be exchanged for certificates in non-global form representing the securities it represented. After that exchange, the choice of whether to hold the securities directly or in street name will be up to the investor. Investors must consult their own banks or brokers to find out how to have their interests in a global security transferred on termination to their own names, so that they will be holders. We have described the rights of holders and street name investors above under “—Who is the Legal Owner of a Registered Security?”.

The special situations for termination of a global security are as follows:

DTC’s current rules provide that it would notify its participants of a request by us to terminate a global security, but will only withdraw beneficial interests from the global security at the request of each DTC participant.

If a global security is terminated, only the depositary, and not we, the trustee for any debt securities, the warrant agent for any warrants or the unit agent for any units, is responsible for deciding the names of the institutions in whose names the securities represented by the global security will be registered and, therefore, who will be the holders of those securities.

Euroclear and Clearstream are securities clearing systems in Europe. Both systems clear and settle securities transactions between their participants through electronic, book-entry delivery of securities against payment.

Euroclear and Clearstream may be depositaries for a global security. In addition, if DTC is the depositary for a global security, Euroclear and Clearstream may hold interests in the global security as participants in DTC.

As long as any global security is held by Euroclear or Clearstream, as depositary, you may hold an interest in the global security only through an organization that participates, directly or indirectly, in Euroclear or Clearstream. If Euroclear or Clearstream is the depositary for a global security and there is no depositary in the United States, you will not be able to hold interests in that global security through any securities clearance system in the United States.

Payments, deliveries, transfers, exchanges, notices and other matters relating to the securities made through Euroclear or Clearstream must comply with the rules and procedures of those systems. Those clearing systems could change their rules and procedures at any time. We do not have control over those systems or their participants, and we do not take responsibility for their activities. Transactions between participants in Euroclear or Clearstream, on the one hand, and participants in DTC, on the other hand, when DTC is the depositary, would also be subject to DTC’s rules and procedures.

Investors will be able to make and receive through Euroclear and Clearstream payments, deliveries, transfers, exchanges, notices and other transactions involving any securities held through those clearing systems only on days when those systems are open for business. These clearing systems may not be open for business on days when banks, brokers and other institutions are open for business in the United States.

In addition, because of time-zone differences, U.S. investors who hold their interests in the securities through these clearing systems and wish to transfer their interests, or to receive or make a payment or delivery or exercise any other right with respect to their interests, on a particular day may find that the transaction will not be effected until the next business day in Luxembourg or Brussels, as applicable. Thus, investors who wish to exercise rights that expire on a particular day may need to act before the expiration date. In addition, investors who hold their interests through both DTC and Euroclear or Clearstream may need to make special arrangements to finance any purchases or sales of their interests between the U.S. and European clearing systems, and those transactions may settle later than would be the case for transactions within one clearing system.

We may offer and sell the securities to or through underwriters or dealers for resale, and also may offer and sell the securities directly to other purchasers or through designated agents or a combination of these methods. Any underwriter or agent involved in the offer and sale of the securities will be named in the applicable prospectus supplement. We may also use this prospectus in connection with any rescission offer for securities described in this prospectus on the terms and conditions described in the applicable prospectus supplement.

Distribution of the securities may be effected from time to time in one or more transactions at a fixed price or prices, which may be changed, or at market prices prevailing at the time of sale, at prices related to such prevailing market prices or at negotiated prices. We may solicit offers to purchase securities directly from the public from time to time. We also may, from time to time, authorize underwriters acting as our agents to offer and sell the securities upon the terms and conditions set forth in any prospectus supplement.

In addition, we may issue the securities as a dividend or distribution or in a subscription rights offering to our existing security holders. In some cases, we or dealers acting with us or on our behalf may also purchase securities and reoffer them to the public by one or more of the methods described above. This prospectus may be used in connection with any offering of the securities through any of these methods or other methods described in the applicable prospectus supplement.

In connection with the sale of securities, underwriters may receive compensation from us or from purchasers of the securities, for whom they may act as agents, in the form of discounts, concessions or commissions. Underwriters may sell the securities to or through dealers, and such dealers may receive compensation in the form of discounts, concessions or commissions from the underwriters and/or commissions from the purchasers for whom they may act as agents. Underwriters, dealers and agents that participate in the distribution of the securities may be deemed to be underwriters, and any discounts or commissions they receive from us, and any profit on the resale of the securities they realize may be deemed to be underwriting discounts and commissions under the Securities Act. Any such underwriter, dealer or agent will be identified, and any such compensation received will be described as required in the applicable prospectus supplement.

We may enter into derivative transactions with third parties, or sell securities not covered by this prospectus to third parties in privately negotiated transactions. If the applicable prospectus supplement indicates, in connection with those derivatives, the third parties may sell securities covered by this prospectus and the applicable prospectus supplement, including in short sale transactions. If so, the third party may use securities pledged by us or borrowed from us or others to settle those sales or to close out any related open borrowings of stock, and may use securities received from us in settlement of those derivatives to close out any related open borrowings of stock. The third party in such sale transactions will be an underwriter and will be identified in the applicable prospectus supplement or a post-effective amendment.

If we offer securities in a subscription rights offering to our existing security holders, we may enter into a standby underwriting agreement with dealers, acting as standby underwriters. We may pay the standby underwriters a commitment fee for the securities they commit to purchase on a standby basis. If we do not enter into a standby underwriting arrangement, we may retain a dealer-manager to manage a subscription rights offering for us.

Unless otherwise specified in the related prospectus supplement, each series of the securities will be a new issue with no established trading market, other than the common stock. Any common stock sold pursuant to a prospectus supplement will be listed on the New York Stock Exchange, subject to official notice of issuance. We may elect to list any of the other securities on an exchange, but are not obligated to do so. It is possible that one or more underwriters may make a market in a series of the securities, but will not be obligated to do so and may discontinue any market making at any time without notice. Therefore, no assurance can be given as to the liquidity of the trading market for the securities.

If dealers are utilized in the sale of the securities, we will sell the securities to the dealers as principals or the dealers may act as our agents. If the dealers act as principals, the dealers may then resell the securities to the public at varying prices to be determined by such dealers at the time of resale. The names of the dealers and the terms of the transaction will be set forth in the applicable prospectus supplement.

We may enter into agreements with underwriters, dealers and agents who participate in the distribution of the securities which may entitle these persons to indemnification by us against certain liabilities, including

liabilities under the Securities Act, or to contribution with respect to payments which such underwriters, dealers or agents may be required to make in respect thereof. Any agreement in which we agree to indemnify underwriters, dealers and agents against civil liabilities will be described in the applicable prospectus supplement.

Underwriters, dealers and agents may engage in transactions with, or perform services for, or be customers of ours in the ordinary course of business.

If so indicated in an applicable prospectus supplement, we may authorize dealers acting as our agents to solicit offers by certain institutions to purchase the securities from us at the public offering price set forth in the prospectus supplement pursuant to delayed delivery contracts providing for payment and delivery on the date or dates stated in the prospectus supplement. Each delayed delivery contract will be for an amount not less than, and the aggregate principal amount or offering price of the securities sold pursuant to delayed delivery contracts will not be less nor more than, the respective amounts stated in the prospectus supplement. The obligations of any purchaser under any delayed delivery contract will not be subject to any conditions except that any related sale of offered securities to underwriters shall have occurred and the purchase of the securities covered by its delayed delivery contract shall not at the time of delivery be prohibited under the laws of any jurisdiction in the United States to which that institution is subject. The prospectus supplement will state any commission payable for solicitation of these offers.

We and our designated agents or dealers, if any, may also use this prospectus in connection with a rescission offer with respect to any securities described in this prospectus. The accompanying prospectus supplement will describe the terms and conditions of any rescission offer.

Unless otherwise indicated in the applicable prospectus supplement, the validity of the securities issued by us will be passed upon for us by Sullivan & Cromwell LLP, New York, New York.

Ernst & Young LLP, independent registered public accounting firm, has audited our consolidated financial statements and schedules included in our Annual Report on Form 10-K for the year ended December 31, 2022, and the effectiveness of our internal control over financial reporting as of December 31, 2022, as set forth in their reports, which are incorporated by reference into this prospectus and the registration statement. Our financial statements and schedules are incorporated by reference in reliance on Ernst & Young LLP’s reports, given on their authority as experts in accounting and auditing.