APLP Archrock Partners, L.P. Representing Limited Partner Interests (delisted)

Archrock, Inc. Investor Meetings April 3-4, 2018 © 2018 Archrock, Inc. All rights reserved.

Cautionary Note to Investors © 2018 Archrock, Inc. All rights reserved. Forward Looking Statements All statements in this presentation (and oral statements made regarding the subjects of this presentation) other than historical facts are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-looking statements rely on a number of assumptions concerning future events and are subject to a number of uncertainties and factors that could cause actual results to differ materially from such statements, many of which are outside the control of Archrock, Inc. (“Archrock” or “AROC”) and Archrock Partners, L.P. (“Archrock Partners” or “APLP”). Forward-looking information includes, but are not limited to: statements regarding the expected benefits of the proposed transaction to Archrock, Archrock Partners and their respective equity holders; the anticipated completion of the proposed transaction and the timing thereof; the expected future growth, leverage, dividends, and distributions of the combined company following the proposed transactions; the industry fundamentals, including the attractiveness of returns and valuation, stability of cash flows, demand dynamics and overall outlook, and Archrock’s ability to realize the benefits thereof; Archrock’s expectations regarding future economic and market conditions and trends; Archrock’s operational and financial strategies, including planned capital expenditures and growth activities, Archrock’s ability to successfully effect those strategies and the expected results therefrom; Archrock’s financial and operational outlook, and ability to fulfill that outlook; demand and growth opportunities for Archrock’s services; statements related to performance, profitability, structural and process improvement initiatives, the expected timing thereof, Archrock’s ability to successfully effect those initiatives and the expected results therefrom; the operational and financial synergies provided by Archrock’s and Archrock Partners’ size; and statements regarding Archrock, Inc.’s dividend policy and Archrock Partners’ distribution policy. While Archrock and Archrock Partners (together, the “Companies”) believe that the assumptions concerning future events are reasonable, they caution that there are inherent difficulties in predicting certain important factors that could impact the future performance or results of their businesses. The factors that could cause results to differ materially from those indicated by such forward-looking statements include, but are not limited to: the failure to realize the anticipated cost savings, synergies and other benefits of the proposed transaction; the possible diversion of management time on transaction-related issues; changes in customer, employee or supplier relationships; local, regional and national economic and financial market conditions and the impact they may have on the Companies and their respective customers; changes in tax laws that impact master limited partnerships; conditions in the oil and gas industry, including a sustained decrease in the level of supply or demand for oil or natural gas or a sustained decrease in the price of oil or natural gas; changes in economic conditions in key operating markets; the financial condition of the Companies’ customers; the failure of any customer to perform its contractual obligations; changes in safety, health, environmental and other regulations; the effectiveness of our control environment, including the identification of additional control deficiencies; the results of any reviews, investigations or other preceding by government authorities; the results of any shareholder actions relating to Archrock’s restatement of financial statements that may be filed; the potential additional costs related to Archrock’s restatement, cost sharing with Exterran Corporation and addressing any reviews, investigation or other proceedings by government authorities or shareholder actions; and with respect to Archrock, the performance of Archrock Partners. These forward-looking statements are also affected by the risk factors, forward-looking statements and challenges and uncertainties described in Archrock’s Annual Report on Form 10-K for the year ended December 31, 2017, Archrock Partners’ Annual Report on Form 10-K for the year ended December 31, 2017, and those set forth from time to time in Archrock’s and Archrock Partners’ filings with the Securities and Exchange Commission, which are currently available at www.archrock.com. Except as required by law, Archrock and Archrock Partners expressly disclaim any intention or obligation to revise or update any forward-looking statements whether as a result of new information, future events or otherwise. Important Additional Information Regarding the Transaction Will Be Filed With the SEC In connection with the proposed transaction, Archrock filed with the SEC a registration statement on Form S-4, including a joint proxy statement/prospectus of Archrock and Archrock Partners. INVESTORS AND SECURITY HOLDERS OF ARCHROCK AND ARCHROCK PARTNERS ARE ADVISED TO CAREFULLY READ THE REGISTRATION STATEMENT AND JOINT PROXY STATEMENT/PROSPECTUS (INCLUDING ALL AMENDMENTS AND SUPPLEMENTS THERETO) BECAUSE THEY CONTAIN IMPORTANT INFORMATION ABOUT THE TRANSACTION, THE PARTIES TO THE TRANSACTION AND THE RISKS ASSOCIATED WITH THE TRANSACTION. The registration statement on Form S-4 was declared effective by the SEC on March 21, 2018, and the definitive joint proxy statement/prospectus will be delivered to security holders of record of Archrock and Archrock Partners as of March 14, 2018. Investors and security holders may obtain a free copy of the joint proxy statement/prospectus and other relevant documents filed by Archrock and Archrock Partners with the SEC from the SEC’s website at www.sec.gov. Security holders and other interested parties will also be able to obtain, without charge, a copy of the joint proxy statement/prospectus and other relevant documents from www.archrock.com under the tab “Investors” and then under the heading “SEC Filings.” Security holders may also read and copy any reports, statements and other information filed with the SEC at the SEC public reference room at 100 F Street N.E., Room 1580, Washington D.C. 20549. Please call the SEC at (800) 732-0330 or visit the SEC’s website for further information on its public reference room. No Offer or Solicitation This communication is for informational purposes only and shall not constitute an offer to sell or the solicitation of an offer to buy any securities pursuant to the transaction or otherwise, nor shall there be any sale of securities in any jurisdiction in which the offer, solicitation or sale would be unlawful prior to the registration or qualification under the securities laws of any such jurisdiction. No offer of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended. Participants in the Solicitation Archrock, Archrock Partners and their respective directors, executive officers and certain other members of management may be deemed to be participants in the solicitation of proxies from their respective security holders with respect to the transaction. Information about these persons is set forth in Archrock’s proxy statement relating to its 2018 Annual Meeting of Stockholders, which was filed with the SEC on March 19, 2018 as part of the joint proxy statement/prospectus referred to above, and Archrock Partners’ Annual Report on Form 10-K for the year ended December 31, 2017, which was filed with the SEC on February 22, 2018, and subsequent statements of changes in beneficial ownership on file with the SEC. Security holders and investors may obtain additional information regarding the interests of such persons, which may be different than those of the respective companies’ security holders generally, by reading the joint proxy statement/prospectus and other relevant documents regarding the transaction, which will be filed with the SEC.

Investment Highlights Visible Long-Term Growth U.S. natural gas demand is forecast to increase to ~91.5 bcf/d by 2022 from ~78.4 bcf/d in 2017, an approximate 16% increase1 Business tied to long-term natural gas production Relative Cash Flow Stability Fee-based contracts for “must-run” production and midstream infrastructure assets Production leveraged business model generates steady demand for services and relatively stable cash flow Cash flow generation provides capital to fund capital investments in an up cycle and stability in a down cycle Largest Player with Benefit of Scale and Market Presence Largest fleet among outsourced compression services providers Fleet is deployed across all major U.S. producing basins Combined operating fleet of 3.3mm HP2 with Archrock Partners Access to Capital Expected lower cost of equity capital than previous MLP structure Access to larger C-Corp investor base Increased equity trading liquidity © 2018 Archrock, Inc. All rights reserved. 1 Data from Drilling Info, Fundamental Edge (January 2018). 2 As of December 31, 2017.

Archrock Structure © 2018 Archrock, Inc. All rights reserved. Current Structure1 Pro Forma Structure1 AROC Public Shareholders APLP Public Unitholders $700 million of Senior Notes GP 41% LP 2% GP 100% IDR 100% 57% Legacy AROC Public Shareholders $700 million of Senior Notes 100% 55% Legacy APLP Public Unitholders 45% 100% 1 Simplified structure. Ownership percentages based on AROC shares and APLP units outstanding as of February 22, 2018.

Transaction Rationale © 2018 Archrock, Inc. All rights reserved. Long-Term Financial Stability Accelerates achieving target leverage of 3.5x to 4.0x Debt to EBITDA through additional retained cash flow Expected pro forma cash available for dividend coverage above 2.0x through 2020 Improved Cost of Capital Archrock expected to benefit from improved cost of and access to capital C-Corp structure expected to attract a broader universe of investors Increased public float of Archrock expected to increase trading liquidity Simplified C-Corp Structure Cost savings estimated at $2mm – $3mm annually Single public entity with simplified governance Better positioned to participate in industry consolidation No Cash Income Taxes Tax basis step-up that is expected to provide a federal income cash tax deferral No cash federal income taxes expected through at least 2023 Compelling Deal Economics Significant premium to recent APLP equity trading price Expected to be immediately accretive to AROC shareholders Attractive targeted dividend growth rate of 10-15% through 2020 Increased retained cash flow for investment into growth projects

What Does Compression Do? Increases pressure from suction to discharge © 2018 Archrock, Inc. All rights reserved. Wellhead Gathering System 50 PSI Suction Pressure1 Inlet Sources Gathering System Pipeline Processing Plant Storage Facility Reservoir 1,200 PSI Discharge Pressure1 Outlet Sources 1 Pressures based on an illustrative example from the Eagle Ford shale.

Where is Compression Used? Compression is an essential service utilized all along the production cycle to transport gas to the end user Processing Wellhead Production Power Generation Storage Industrial Residential Exports - Pipelines Gathering System © 2018 Archrock, Inc. All rights reserved. LNG Chemical Feed-Stocks and Fuels Natural Gas Crude Oil Gas Lift 77% of Fleet1 23% of Fleet1 Enhanced Oil Recovery 1Based on operating horsepower of Archrock and Archrock Partners combined U.S. compression fleet as of December 31, 2017.

Aftermarket Services Overview © 2018 Archrock, Inc. All rights reserved. Field Services Sales of field labor services concentrated around: Scheduled Maintenance Major Maintenance Unscheduled Call-Outs Parts Sales of natural gas engines, compressors and accessory parts needed for maintenance and repair of compression equipment Shop Services / Revamps Services such as parts remanufacturing, valve repair and machining that is performed in Archrock shops across the U.S. Re-design of existing compression assets to meet new operating conditions AMS Business Segments AMS Highlights Revenue stream from customers that choose to own compression Leverages existing infrastructure of contract compression business Significant opportunity as newer compression in shale developments approaches major maintenance cycle

Positioned for Growth Archrock is ready to meet increasing natural gas demand © 2018 Archrock, Inc. All rights reserved. Growing Natural Gas Production Strong natural gas demand fundamentals to be met by growing U.S. production Demand driven by increases in LNG, exports to Mexico, and petrochemical project development Demand for Compression Growing U.S. production requires additional compression Generally shale development requires more compression than conventional wells Financial Strength Proven operating track record Liquidity to support growth Sustainable distribution and dividend Cash flow stability Positioned for Growth Committed to meeting the market’s growing demand for reliable contract compression Increased growth capital budget Successfully executed third party acquisitions

U.S. Forecasted Production Growth Driven by Strong Demand Outlook Sources of Demand Forecasted Supply3 North America LNG Export Terminals approved by the Federal Energy Regulatory Commission and under construction as of January 24, 2018. Timing estimates based on management estimates and sponsor publications. Data from Drilling Info, Fundamental Edge (January 2018). Data from EIA Annual Energy Outlook 2018 (February 2018). U.S. LNG Exports1 U.S. Natural Gas Demand Growth2 © 2018 Archrock Partners, L.P. All rights reserved. Growing Gas Production Demand for Compression Financial Strength Positioned for Growth

Growth Play Focused Strong Presence in All Major Growing U.S. Producing Basins Note: Excludes offshore units in the Gulf of Mexico 1 Source: Drilling Info, Fundamental Edge (January 2018); growth in natural gas production per day from 2016 to 2022. © 2018 Archrock, Inc. All rights reserved. Archrock’s geographic diversity provides stability and growth opportunities across the U.S. Permian Eagle Ford Marcellus / Utica Expected growth of 8 bcf/d1 Associated gas production growth Low break-even economics Competitive market Demand for centralized gas lift Expected growth of 1 bcf/d1 Associated gas production growth Demand for centralized gas lift Outsourced compression leader MidCon Expected growth of 4 bcf/d1 SCOOP/STACK development Associated gas production growth Expected growth of 11 bcf/d1 Large dry gas resource base Pipeline build-out will lead to de-bottlenecking EAGLE FORD MARCELLUS/UTICA Growing Gas Production Demand for Compression Financial Strength Positioned for Growth

Pad Drilling Pad drilling brings multiple laterals to a single wellsite and increases flow at the wellsite Efficiency Large HP is more cost effective than a series of small horsepower units Associated Gas Development Associated gas production from shale is generally at a lower initial pressure than dry gas wells and requires more compression Large Horsepower Growth Drivers © 2018 Archrock, Inc. All rights reserved. U.S. natural gas production growth increasing demand for Archrock’s services Growth in Contract Compression Increasing Lateral Lengths Longer lateral lengths increases flow to the wellhead Drilling Predictability High probability drilling programs allow for efficient surface infrastructure planning Growing Gas Production Demand for Compression Financial Strength Positioned for Growth

The combination of Archrock and Archrock Partners will be the largest outsourced compression provider in the U.S. Operating HP at Leader in U.S. Contract Compression Services U.S. Outsourced Compression Competitors1 Archrock Highlights We are proud of the quality of our service, delivering an average availability of over 99% Archrock is the leading contract compression services operator in the U.S. Archrock’s business size and scale provide significant operational and financial synergies 1 As of 12/31/17; USAC/CDM as disclosed on January 16, 2018. SEC filings and management estimates. Operating HP at © 2018 Archrock, Inc. All rights reserved. Growing Gas Production Demand for Compression Financial Strength Positioned for Growth

Modern Fleet Meeting Customer Demand 1 Archrock consolidated fleet as of December 31, 2017. Horsepower reported as original equipment manufacturer (OEM) horsepower. 2 As of December 31, 2017. HP by Play Type 2 Archrock has the largest fleet of large HP in the industry Consolidated Available Fleet by HP Range1 22% 11% 67% 0-499 HP 855k HP HP by Application 1 Application (k HP)1 © 2018 Archrock, Inc. All rights reserved. Non - Conventional 65% Conventional 28% Offshore 4% Other 3% 500-999 HP 416k HP 1,000 HP & Greater 2,576k HP Growing Gas Production Demand for Compression Financial Strength Positioned for Growth Gathering 58% Wellhead 13% Gas Lift 23% Other 6%

Recent Performance Highlights Increase of approximately 49,000 operating horsepower from Q3-17 Contract operations revenue up ~$3 million or 2%, sequentially Contract operations gross margin percentage1 of 59% Aftermarket services revenue up ~$8 million or 19%, sequentially Increase of approximately 138,000 operating horsepower from year-end 2016 Contract operations revenue down only ~6% compared to 2016, primarily due to horsepower returns and pricing pressure experienced in 2016 and the first half of 2017 Aftermarket services revenue up 15% from full year 2016 Robust 2017 contract operations bookings set up business for growth in 2018 Fourth Quarter 2017 1 See Addendum I regarding non-GAAP measures for information on gross margin, gross margin percentage, cash available for dividend coverage, and Archrock Partners distributable cash flow and distributable cash flow coverage. © 2018 Archrock, Inc. All rights reserved. Full Year 2017 Growing Gas Production Demand for Compression Financial Strength Positioned for Growth

Financial Differentiation © 2018 Archrock, Inc. All rights reserved. Attractive C-Corp Structure Post merger Archrock will be the only pure-play C-corp outsourced compression services provider C-Corp structure expected to benefit from greater trading liquidity and lower cost of capital Dividend and Distribution Strong coverage and sustainable dividend and distribution levels All Archrock dividends and Archrock Partners distributions are paid in cash Cost of Capital Long-term capital structure with senior notes and attractive cost of debt Archrock Partners has the highest distribution coverage and lowest current equity yield among publicly-traded competitors1 Liquidity Greatest liquidity among publicly-traded competitors1 Adequate covenant capacity and focus on reducing leverage over time 1 Publicly-traded competitors include USA Compression Partners, L.P. and CSI Compressco, L.P. Growing Gas Production Demand for Compression Financial Strength Positioned for Growth

Stability of Business Model Fee-based compression services provide relatively stable cash flow Compression Services Revenue and Oil & Gas Prices1,2,3 © 2018 Archrock, Inc. All rights reserved. Note: Historical data should not be relied upon as being indicative of future results. 1 Henry Hub indexed to $5.63 per million BTU at December 31, 2008; WTI indexed to $44.60 per barrel at December 31, 2008. Prices presented through December 31, 2017. 2 Data represents combined Archrock and Archrock Partners compression services revenue for the periods presented. 3 In December 2013, Archrock abandoned its contract water treatment business. All periods exclude results from Archrock’s contract water treatment business. Growing Gas Production Demand for Compression Financial Strength Positioned for Growth

Note: Historical data should not be relied upon as being indicative of future results. 1 See Addendum I regarding non-GAAP measures for information on Archrock gross margin and gross margin per horsepower. 2 A customer’s exercise of purchase options on two natural gas processing plants increased gross margin per average operating horsepower per month by $0.97 in the second quarter 2013. Archrock Profitability Trend Archrock Gross Margin per Horsepower per Month1,2 Archrock gross margin per horsepower benefitted from profit improvement initiatives and fleet high grading including the MidCon acquisitions © 2018 Archrock, Inc. All rights reserved. Growing Gas Production Demand for Compression Financial Strength Positioned for Growth

. Note: LTM data should not be relied upon as being indicative of full year results. 1 See Addendum I regarding non-GAAP measures for information on gross margin. Archrock historical gross margin was derived from the reported Exterran Holdings segment gross margin of North America Contract Operations and Aftermarket Services less International Aftermarket Services gross margin. 2 See Addendum I for information on Archrock EBITDA, as adjusted. Proven Track Record Archrock Gross Margin1 Archrock EBITDA, as adjusted2 Our financial results have benefitted from growth and performance improvement initiatives © 2018 Archrock, Inc. All rights reserved. Growing Gas Production Demand for Compression Financial Strength Positioned for Growth

Proven Profitability of AMS Business AMS Gross Margin1 Note: Historical data should not be relied upon as being indicative of future results. 1 See Addendum I regarding non-GAAP measures for information on gross margin and gross margin percentage. © 2018 Archrock, Inc. All rights reserved. AMS Gross Margin Percentage1 Growing Gas Production Demand for Compression Financial Strength Positioned for Growth

Dividend and Distribution Coverage Note: Historical data should not be relied upon as being indicative of future results. 1 See Addendum I regarding non-GAAP measures for information on Archrock cash available for dividend coverage and Archrock Partners distributable cash flow coverage. 2 Dividend and distribution levels with respect to future quarters have not been declared and will be determined by the companies’ respective boards of directors. 3 Q1-14 pro forma for acquisition of compression assets from MidCon Compression LLC closed April 10, 2014. 4 Archrock Partners cash distribution of $0.285 per limited partner unit for the first-quarter, second-quarter, third-quarter and fourth-quarter of 2016 is approximately 50 percent lower than the fourth-quarter 2015 distribution. 5 Q2-17 excludes distribution paid on the sale of 4,600,000 common units priced on August 3, 2017. 6 Archrock increased its dividend per quarter to $0.120 per share from $0.095 per share beginning with the Q3-16 dividend payment. APLP Distributable Cash Flow Coverage1,2,3,4,5 AROC Cash Available for Dividend Coverage 1,2,6 © 2018 Archrock, Inc. All rights reserved. 1.14x 1.96x 2.63x 2.04x 1.36x 1.35x 0.98x 0.88x 1.36x 0.00x 0.50x 1.00x 1.50x 2.00x 2.50x Q4-15 Q1-16 Q2-16 Q3-16 Q4-16 Q1-17 Q2-17 Q3-17 Q4-17 Dividend Coverage Ratio Growing Gas Production Demand for Compression Financial Strength Positioned for Growth

1 As of December 31, 2017, Archrock Partners had undrawn capacity of $425.7 million under its revolving credit facility. The Archrock Partners credit agreement limits the Total Debt (as defined in the credit agreement) to EBITDA ratio (as defined in the credit agreement) to not greater than 5.95 to 1.0 and the Senior Secured Debt (as defined in the credit agreement) to EBITDA ratio (as defined in the credit agreement) to not greater than 3.50 to 1.00. As a result of this limitation, $297.3 million of undrawn capacity under our revolving credit facility was unavailable for additional borrowings as of December 31, 2017. 2 As of December 31, 2017, Archrock had undrawn capacity of $278.6 million under its revolving credit facility. The Archrock credit agreement limits the Total Debt (as defined in the credit agreement) to EBITDA ratio (as defined in the credit agreement) to not greater than 4.25 to 1.00. As a result of this limitation, $77.9 million of the $278.6 million of undrawn capacity under Archrock’s revolving credit facility was unavailable to Archrock for additional borrowings as of December 31, 2017. 3 Archrock Partners’ $1.1 billion asset-based credit facility will mature the earlier of (i) March 30, 2022 or (ii) December 2, 2020 if any portion of Archrock Partners Senior Notes due April 2021 are outstanding on such date. Graph assumes Senior Notes due 2021 are refinanced prior to December 2, 2020. Enhanced Credit Profile Liquidity Profile ($ in millions) Debt Maturity Profile Archrock has ample access to capital to execute its growth strategy No near-term maturities Committed to maintaining leverage and liquidity metrics through the cycle APLP covenant allows for 5.95x leverage through 2018 and 5.75x throughout 2019 Highlights © 2018 Archrock, Inc. All rights reserved. 3 $0 AROC RCF APLP RCF APLP Notes Growing Gas Production Demand for Compression Financial Strength Positioned for Growth Archrock Partners Liquidity 1 Revolving credit facility capacity $1,100.0 Revolving credit facility unavailable due to covenant constraints ($297.3) Borrowings under facility ($674.3) Liquidity at Archrock Partners Standalone $128.4 Archrock Standalone Liquidity 2 Revolving credit facility capacity $350.0 Borrowings under facility and letters of credit ($71.4) Revolving credit facility unavailable due to covenant constraints ($77.9) Liquidity at Archrock Standalone $200.7 Total Liquidity of Archrock Companies $329.1

Growth Highlights and Strategies 2018 Outlook 1 Five years ended December 31, 2017; includes units added through third party acquisitions. © 2018 Archrock, Inc. All rights reserved. Long-term Growth Strategies with Demonstrated Execution Record backlog of new orders for contract operations entering 2018 Implemented price increase on eligible portion of installed base of operating horsepower in Q1 2018 2018 growth capital budget of $200 to $220 million Continued investment in high demand large horsepower units Organic Growth and Operational Enhancements Strategy to leverage our market position, service capability, existing fleet and capital strength Secular growth drivers expected to increase natural gas production and compression demand ~1.5 million HP of units added to combined fleet in last ~5 years1 Continued focus on improving field operations, operating costs, and competitiveness and profitability of fleet Third Party Acquisitions Demonstrated ability to source and execute deals such as MidCon acquisitions Opportunity to source from customers and competitors Lower cost of capital to provide execution advantages Growing Gas Production Demand for Compression Financial Strength Positioned for Growth

Investment Highlights © 2018 Archrock, Inc. All rights reserved. Available Liquidity Largest Fleet Deployed to Major Basins Relative Stability Optimized Structure for Growth Long-term Growth Opportunities Full Cycle Outsourced Provider Growing Gas Production Demand for Compression Financial Strength Positioned for Growth

© 2016 Archrock, Inc. All rights reserved. Appendix

Merger Terms & Update Merger Terms Archrock has executed a definitive merger agreement to acquire all of the outstanding common units of Archrock Partners not already owned by AROC APLP common unitholders will receive 1.40 AROC shares for each outstanding APLP common unit 100% of consideration to APLP common unitholders in the form of AROC shares APLP’s incentive distribution rights will be eliminated APLP Senior Notes to remain outstanding Taxable transaction to APLP common unitholders1 with tax basis step-up to AROC Timing Update Transaction on target to close in Q2 2018, subject to customary closing conditions Record date established on March 14, 2018 S-4 declared effective by SEC on March 21, 2018 Archrock has received early termination under the Hart-Scott-Rodino Act AROC shareholder and APLP unitholder votes scheduled for April 25, 2018 1The tax consequences to a particular APLP common unitholder will depend on such unitholder’s tax basis in its common units and other tax attributes. © 2018 Archrock, Inc. All rights reserved. Terms and Timing Update

Compression Applications & Customers Services Provided Average HP / Unit1,2 Units2 Overview Customer Types Archrock Focus Wellhead 378 1,075 Compression located at the well site Often smaller units that are compressing a single well Upstream E&P Gathering 961 1,971 Transports gas from multiple wells to a compressor or compressor station Often larger units compared to wellhead Upstream E&P Midstream G&P Gas Lift 343 2,179 Use of gas to artificially lift oil or fluids from a well Unit size can vary based on the volume and number of wells being lifted Upstream E&P Other 635 325 Includes plant compression, flash gas, residue plant compression, CO2 injection and storage Various More limited opportunities © 2018 Archrock, Inc. All rights reserved. 1 Horsepower reported as original equipment manufacturer (OEM) horsepower and unit data as of December 31, 2017. 2 Data represents Archrock and Archrock Partners combined operated U.S. compression fleet as of December 31, 2017.

© 2016 Archrock, Inc. All rights reserved. Addendum I: Non-GAAP Financial Measures

Archrock, Inc. (Exterran Holdings, Inc. pre-spin): Gross margin, a non-GAAP measure, is defined as total revenue less cost of sales (excluding depreciation and amortization). Gross margin percentage is defined as gross margin divided by revenue. Cash available for dividend, a non-GAAP measure, is defined as distributions received by us from Archrock Partners, L.P., plus our deconsolidated gross margin, less the following deconsolidated items: maintenance and other capital expenditures, cash SG&A expense excluding corporate office relocation costs, cash interest expense associated with our debt, cash tax, (gain) loss on sale of property, plant and equipment, and expensed acquisition and merger related costs. Cash available for dividend coverage is defined as cash available for dividend divided by total dividends. EBITDA, as adjusted, a non-GAAP measure, is defined as net income (loss) excluding income (loss) from discontinued operations (net of tax), income taxes, interest expense, depreciation and amortization, long-lived asset impairment, restructuring and other charges, corporate office relocation costs, goodwill impairment, expensed acquisition and merger related costs, indemnification (income) expense, net, restatement and other charges, debt extinguishment costs, and other items. Archrock Partners, L.P. (Exterran Partners, L.P. pre-spin): EBITDA, as adjusted, a non-GAAP measure, is defined as net income (loss) (a) excluding income taxes, interest expense, depreciation and amortization, long-lived asset impairment, restructuring charges, expensed acquisition costs, debt extinguishment costs, non-cash SG&A costs and other items (b) plus the amounts reimbursed to Archrock Partners by Archrock as a result of caps on cost of sales and SG&A costs provided in the omnibus agreement to which Archrock and Archrock Partners are parties (the “Omnibus Agreement”), which amounts are treated as capital contributions from Archrock for accounting purposes. Under the Omnibus Agreement, the caps on cost of sales and SG&A costs terminated effective January 1, 2015. EBITDA, as adjusted (without the benefit of the cost caps) is defined as EBITDA, as adjusted, less the amounts reimbursed to Archrock Partners by Archrock as a result of caps on cost of sales and SG&A costs provided in the Omnibus Agreement. Distributable cash flow, a non-GAAP measure, is defined as net income (loss) (a) plus depreciation and amortization, long-lived asset impairment, restructuring charges, expensed acquisition costs, non-cash SG&A costs, debt extinguishment costs, and interest expense and any amounts reimbursed to Archrock Partners by Archrock as a result of the caps on cost of sales and SG&A costs provided in the Omnibus Agreement, which amounts are treated as capital contributions from Archrock for accounting purposes, (b) less cash interest expense (excluding amortization of deferred financing fees, amortization of debt discount and non-cash transactions related to interest rate swaps) and maintenance capital expenditures, and (c) excluding gains or losses on asset sales and other items. Under the Omnibus Agreement, the caps on cost of sales and SG&A costs terminated effective January 1, 2015. Distributable cash flow (without the benefit of cost caps) is defined as distributable cash flow less the amounts reimbursed to Archrock Partners by Archrock as a result of caps on cost of sales and SG&A costs provided in the Omnibus Agreement. Gross margin, a non-GAAP measure, is defined as total revenue less cost of sales (excluding depreciation and amortization). Gross margin percentage is defined as gross margin divided by revenue. © 2018 Archrock, Inc. All rights reserved. Non-GAAP Financial Measures Addendum I-A

1 See Addendum I-A for more information on gross margin and gross margin percentage and addendum I-D for a reconciliation to net income (loss). © 2018 Archrock, Inc. All rights reserved. Non-GAAP Financial Measures Archrock, Inc. (Exterran Holdings, Inc. pre-spin) Addendum I-B ($ in millions) Q4-15 Q1-16 Q2-16 Q3-16 Q4-16 Q1-17 Q2-17 Q3-17 Q4-17 Revenues Contract Operations $189.0 $176.2 $163.0 $156.6 $152.0 $150.0 $151.1 $153.5 $156.3 Aftermarket Services 52.4 37.1 41.2 39.3 41.8 39.9 46.9 $44.3 $52.6 Total $241.3 $213.3 $204.1 $195.8 $193.8 $189.9 $198.0 $197.9 $208.9 Expenses Contract Operations $77.6 $68.2 $58.9 $59.8 $60.2 $64.1 $62.2 $72.0 $64.7 Aftermarket Services 43.6 30.4 34.4 32.8 35.4 33.7 39.6 $38.5 $44.1 Total $121.2 $98.5 $93.2 $92.5 $95.6 $97.8 $101.9 $110.4 $108.8 Gross Margin 1 Contract Operations $111.4 $108.1 $104.1 $96.8 $91.8 $85.9 $88.9 $81.6 $91.6 Aftermarket Services 8.7 6.7 6.8 6.5 6.3 6.2 7.3 5.8 8.5 Total $120.1 $114.8 $110.9 $103.3 $98.1 $92.1 $96.1 $87.4 $100.1 Gross Margin Percentage 1 Contract Operations 59% 61% 64% 62% 60% 57% 59% 53% 59% Aftermarket Services 17% 18% 17% 17% 15% 15% 15% 13% 16% Total 50% 54% 54% 53% 51% 48% 49% 44% 48%

© 2018 Archrock, Inc. All rights reserved. Non-GAAP Financial Measures Archrock, Inc. (Exterran Holdings, Inc. pre-spin) 1 See Addendum I-A for more information on gross margin and gross margin percentage and addendum I-F for a reconciliation to net income (loss). . Addendum I-C ($ millions) 2011 2012 2013 2014 2015 2016 2017 Revenues Contract Operations $570.8 $596.0 $627.8 $729.1 $781.2 $647.8 $610.9 Aftermarket Services 209.1 240.8 234.9 230.1 216.9 159.2 183.7 Total $779.9 $836.8 $862.7 $959.2 $998.1 $807.1 $794.7 Expenses Contract Operations $293.8 $284.7 $282.5 $316.1 $319.4 $247.0 $263.0 Aftermarket Services 181.5 196.3 188.5 188.3 175.6 132.9 $155.9 Total $475.3 $481.0 $471.0 $504.4 $495.0 $379.9 $418.9 Gross Margin 1 Contract Operations $277.0 $311.3 $345.4 $413.0 $461.8 $400.8 $347.9 Aftermarket Services 27.6 44.5 46.4 41.8 41.3 26.4 27.8 Total $304.6 $355.8 $391.8 $454.8 $503.1 $427.2 $375.7 Gross Margin Percentage 1 Contract Operations 49% 52% 55% 57% 59% 62% 57% Aftermarket Services 13% 18% 20% 18% 19% 17% 15% Total 39% 43% 45% 47% 50% 53% 47%

© 2018 Archrock, Inc. All rights reserved. Non-GAAP Financial Measures Archrock, Inc. (Exterran Holdings, Inc. pre-spin) 1 See Addendum I-A for more information on gross margin and addendum I-F for a reconciliation to net income (loss). . Addendum I-D (in thousands, except per HP amounts) 2011 2012 2013 2014 2015 2016 2017 Contract Operations Gross margin 1 276,971 $ 311,309 $ 345,355 $ 412,961 $ 461,765 $ 400,788 $ 347,916 $ Average Operating Horsepower 2,784 2,839 2,871 3,346 3,620 3,234 3,152 Gross margin per Horsepower per Quarter 24.87 $ 27.41 $ 30.07 $ 30.85 $ 31.89 $ 30.98 $ 27.59 $ Gross margin per Horsepower per Month 8.29 9.14 10.02 10.28 10.63 10.33 9.20

© 2018 Archrock, Inc. All rights reserved. Non-GAAP Financial Measures Archrock, Inc. (Exterran Holdings, Inc. pre-spin) 1 See Addendum I-A for more information on gross margin. Addendum I-E ($ millions) Q4-15 Q1-16 Q2-16 Q3-16 Q4-16 Q1-17 Q2-17 Q3-17 Q4-17 Net income (loss) (142.8) $ (6.7) $ (2.4) $ (10.1) $ (46.1) $ (14.0) $ (4.0) $ (12.7) $ 49.1 $ Selling, general and administrative 35.4 34.7 27.6 25.4 26.7 27.6 25.1 29.1 29.7 Depreciation and amortization 56.5 53.9 51.9 52.1 51.1 47.8 47.2 47.5 46.1 Long-lived asset impairment 87.4 9.9 13.8 16.7 47.1 8.2 5.5 7.1 8.3 Restatement charges - - 0.4 0.4 12.6 0.8 1.9 0.6 1.1 Restructuring and other charges 3.3 8.1 3.0 4.7 1.1 0.5 0.4 0.4 0.1 Goodwill impairment 3.7 - - - - - - - - Interest expense 24.8 20.3 21.2 21.4 21.1 21.4 22.5 22.9 21.9 Debt extinguishment costs 9.2 - - - - 0.3 - - - Other income, net (1.2) (2.0) (0.2) (2.5) (4.0) (0.8) (1.0) (2.7) (1.2) Provision for (benefit from) income taxes 53.1 (3.3) (4.5) (4.9) (11.9) 0.3 (1.6) (4.8) (55.0) (Income) loss from discontinued operations, net of tax (9.1) - 0.0 0.0 0.4 - - 0.1 - Gross margin (1) 120.1 $ 114.8 $ 110.9 $ 103.3 $ 98.1 $ 92.1 $ 96.1 $ 87.4 $ 100.1 $

© 2018 Archrock, Inc. All rights reserved. Non-GAAP Financial Measures Archrock, Inc. (Exterran Holdings, Inc. pre-spin) 1 See Addendum I-A for more information on gross margin. Addendum I-F 2011 2012 2013 2014 2015 2016 2017 ($ millions) Net income (loss) ($355.3) ($37.7) $126.6 $88.7 ($125.7) ($65.2) $18.4 Selling, general and administrative 107.1 127.9 118.9 132.7 131.9 114.5 111.5 Depreciation and amortization 178.5 181.7 187.5 212.3 229.1 209.0 188.6 Long-lived asset impairment 5.7 131.4 16.7 42.8 125.0 87.4 29.1 Restatement and other charges - - - - - 13.5 4.4 Restructuring and other charges 4.5 2.6 - 5.4 4.7 16.9 1.4 Goodwill impairment 32.0 - - - 3.7 - - Interest expense 145.1 129.1 112.2 112.3 107.7 83.9 88.8 Debt extinguishment costs - - - - 9.2 - 0.3 Other (income) expense, net (5.3) (5.1) (22.5) (5.5) (2.1) (8.6) (5.6) Provision for (benefit from) income taxes (50.4) (77.0) (17.8) (28.1) 53.2 (24.6) (61.1) (Income) loss from discontinued operations, net of tax 242.6 (97.0) (129.7) (105.8) (33.7) 0.4 0.1 Gross margin 1 $304.5 $355.8 $391.8 $454.8 $503.1 $427.2 $375.7

1 See Addendum I-A for information on gross margin and cash available for dividend. 2 Defined as cash available for dividend for the period divided by dividend declared for the period to all shareholders. © 2018 Archrock, Inc. All rights reserved. Non-GAAP Financial Measures Archrock, Inc. Addendum I-G ($ in thousands, except per share amounts and ratios) 4Q 2015 1Q 2016 2Q 2016 3Q 2016 4Q 2016 1Q 2017 2Q 2017 3Q 2017 4Q 2017 Reconciliation of Archrock, Inc. Net Loss from Continuing Operations to Cash Available for Dividend Net loss (151,937) (6,726) (2,358) (10,054) (46,079) (14,013) (4,036) (12,683) 49,142 Less: Loss from discontinued operations, net of tax - - - (16) (384) - - (54) - Net loss from continuing operations (151,937) (6,726) (2,358) (10,038) (45,695) (14,013) (4,036) (12,629) 49,142 Less: Archrock Partners net income (loss), excluding goodwill impairment (10,178) 520 3,311 (567) (14,021) (4,316) 5,275 (4,013) 2,633 Deconsolidated net loss from continuing operations (141,759) (7,246) (5,669) (9,471) (31,674) (9,697) (9,311) (8,616) - 46,509 Declared LP distributions to Archrock, Inc. 13,501 6,721 6,721 6,721 8,283 8,283 8,283 8,283 8,283 Declared GP and IDR distributions to Archrock, Inc. 5,445 346 346 346 378 379 379 405 405 Goodwill impairment 3,738 - - - - - - - - Debt extinguishment costs 9,201 - - - - - - - - Deconsolidated items: Restatement charges - - 434 426 12,610 801 1,920 566 1,083 Restructuring and other charges 3,263 3,926 1,796 2,743 1,127 457 366 422 141 Depreciation and amortization 16,556 14,690 13,269 13,981 13,305 10,887 10,973 11,676 11,179 Provision for (benefit from) income taxes 52,758 (3,428) (4,687) (5,066) (12,835) (979) (2,540) (5,503) (55,443) Cash tax (payment) refund 10 (1) 3,805 - 115 423 2 130 (1) Maintenance and other capital expenditures (11,612) (5,402) (6,385) (486) (2,716) (1,374) (6,358) (5,151) (6,102) Long-lived asset impairment 60,869 3,545 5,525 8,804 23,303 2,035 2,427 1,737 3,837 Non-cash selling, general and administrative expense 3,123 3,089 1,634 1,580 1,463 1,633 1,885 1,846 2,035 Non-cash interest expense 1,094 276 747 512 486 481 473 258 254 (Gain) loss on sale of property, plant and equipment (351) (496) 317 (1,267) (968) (905) (125) 96 (479) Corporate office relocation costs - - - - - - - 1,318 - Expensed acquisition and merger related costs - - - - - - - - 275 Other income, net (929) (2,827) (253) (1,580) (1,336) (906) (29) 77 (401) Cash Available for Dividend (1) 14,907 13,193 17,600 17,243 11,541 11,518 8,345 7,544 - 11,575 Dividend declared for the period per share $0.1875 $0.0950 $0.0950 $0.1200 $0.1200 $0.1200 $0.1200 $0.1200 $0.1200 Dividend declared for the period to all shareholders 13,052 6,739 6,699 8,459 8,495 8,534 8,519 8,536 8,519 Cash available for dividend coverage (2) 1.14x 1.96x 2.63x 2.04x 1.36x 1.35x 0.98x 0.88x 1.36x Archrock, Inc. Cash Available for Dividend Declared LP distributions to Archrock, Inc. 13,501 6721 6,721 6,721 8,283 8,283 8,283 8,283 8,283 Declared GP and IDR distributions to Archrock Inc. 5,445 346 346 346 378 379 379 405 405 Total distributions received 18,946 7,067 7,067 7,067 8,661 8,662 8,662 8,688 - 8,688 Deconsolidated items: Contract operations gross margin (1) 13,466 14,496 13,365 12,199 7,779 4,869 4,611 3,966 6,322 Aftermarket services gross margin (1) 8,769 6,694 6,819 6,500 6,349 6,169 7,259 5,843 8,546 Selling, general and administrative (12,406) (10,972) (7,905) (7,531) (8,345) (7,242) (6,859) (8,397) (6,950) Non-cash selling, general and administrative 3,123 3,089 1,634 1,580 1,463 1,633 1,885 1,846 2,035 Maintenance and other capital expenditures (11,612) (5,402) (6,385) (486) (2,716) (1,374) (6,358) (5,151) (6,102) Cash interest expense (5,038) (1,282) (1,117) (819) (797) (717) (732) (795) (759) (Gain) loss on sale of property, plant and equipment (351) (496) 317 (1,267) (968) (905) (125) 96 (479) Corporate office relocation costs - - - - - - - 1,318 - Expensed acquisition and merger related costs - - - - - - - - 275 Cash tax (payment) refund 10 (1) 3,805 - 115 423 2 130 (1) Cash Available for Dividend (1) 14,907 13,193 17,600 17,243 11,541 11,518 8,345 7,544 - 11,575 Dividend declared for the period per share $0.1875 $0.0950 $0.0950 $0.1200 $0.1200 $0.1200 $0.1200 $0.1200 $0.1200 Dividend declared for the period to all shareholders 13,052 6,739 6,699 8,459 8,495 8,534 8,519 8,536 8,519 Cash available for dividend coverage (2) 1.14x 1.96x 2.63x 2.04x 1.36x 1.35x 0.98x 0.88x 1.36x

1 See Addendum 1-A for information on EBITDA, as adjusted. © 2018 Archrock, Inc. All rights reserved. Non-GAAP Financial Measures Archrock, Inc. Addendum I-H ($ in millions) 2011 2012 2013 2014 2015 2016 2017 Net income (loss) (355,308) $ (37,696) $ 126,606 $ 88,661 $ (125,697) $ (65,243) $ 18,410 $ (Income) loss from discontinued operations, net of tax 242,605 (96,966) (129,654) (105,774) (33,677) 426 54 Depreciation and amortization 178,492 181,678 187,476 212,268 229,127 208,986 188,563 Long-lived asset impairment 5,716 131,417 16,696 42,828 124,979 87,435 29,142 Restructuring and other charges 4,463 2,579 - 5,394 4,745 16,901 1,386 Restatement and other charges - - - - - 13,470 4,370 Corporate Office Relocation Charges - - - - - - 1,318 Goodwill impairment 31,994 - - - 3,738 - - Debt extinguishment costs - - - - 9,201 - 291 Interest expense 145,100 129,058 112,194 112,273 107,617 83,899 88,760 Indemnification (income) expense - - - - - (2,593) 430 Expensed acquisition and merger costs - - 246 2,471 - 172 275 Provision for (benefit from) income taxes (50,379) (77,034) (17,840) (28,066) 53,189 (24,604) (61,083) EBITDA, as adjusted 1 $202,683 $233,036 $295,724 $330,055 $373,222 $318,849 $271,916

1 See Addendum I-A for information on gross margin, EBITDA, as adjusted, EBITDA, as adjusted (without the benefit of the cost caps), distributable cash flow and distributable cash flow (without the benefit of the cost caps). 2 Consists of a cash reimbursement from Archrock of non-cash merger-related expenses incurred by Archrock Partners. 3 Defined as distributable cash flow divided by distributions declared to all unit holders for the period, including incentive distributions rights. 4Provisions in the Omnibus Agreement that provided caps on Archrock Partners’ obligation to reimburse us for operating and SG&A expenses terminated on January 1, 2015. Excluding the benefit of the cost caps from Archrock Partners’ previously defined non-GAAP measures of EBITDA, as adjusted, and distributable cash flow provides external users of Archrock Partners’ consolidated financial statements comparable measures to assess operating performance in the current year period with operating performance in the prior year periods. © 2018 Archrock, Inc. All rights reserved. Non-GAAP Financial Measures Archrock Partners, L.P. Addendum I-I ($ in thousands) 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Net income (loss) 19,401 $ 29,847 $ 14,784 $ (23,333) $ 6,053 $ 10,509 $ 64,023 $ 61,719 $ (84,025) $ (10,757) $ (421) $ Depreciation and amortization 16,570 27,053 36,452 52,518 67,930 88,298 103,711 128,196 155,786 153,741 143,848 Long-lived asset impairment - - 3,151 24,976 1,060 29,560 5,350 12,810 38,987 46,258 19,106 Restructuring charges - - - - - - - 702 - 7,309 - Goodwill impairment - - - - - - - - 127,757 - - Debt extinguishment costs - - - - - - - - - - 291 Selling, general and administrative 13,730 16,085 24,226 34,830 39,380 49,889 61,971 80,521 85,586 79,717 82,035 Interest expense 11,658 18,039 20,303 24,037 30,400 25,167 37,068 57,811 74,581 77,863 84,291 Other income, net (22) (1,430) (1,208) (314) (392) (35) (9,481) (74) (1,391) (2,594) (4,384) Provision for income taxes 272 555 541 680 918 945 1,506 1,313 1,035 1,412 3,382 Gross margin 1 61,609 90,149 98,249 113,394 145,349 204,333 264,148 342,998 398,316 352,949 328,148 Cap on operating costs provided by AROC 8,618 12,480 7,246 21,404 26,492 16,562 12,382 2,536 - - - Cap on selling, general and administrative costs provided by AROC 283 120 552 3,316 5,905 8,196 12,798 11,314 - - - Non-cash selling, general and administrative costs 3,184 (2,090) 811 1,209 532 797 1,174 1,376 1,059 1,203 1,062 Expensed acquisition costs (in Other (income) expense, net) - - 803 356 514 695 821 2,471 302 523 - Plus: Non-recurring cash selling, general and administrative reimbursement 2 (848) - - - - - - - - - - Less: Selling, general and administrative (13,730) (16,085) (24,226) (34,830) (39,380) (49,889) (61,971) (80,521) (85,586) (79,717) (82,035) Less: Other income, net 22 1,430 1,208 314 392 35 9,481 74 1,391 2,594 4,384 EBITDA, as adjusted 1 59,138 86,004 84,643 105,163 139,804 180,729 238,833 280,248 315,482 277,552 251,559 Less: Provision for income taxes (272) (555) (541) (680) (918) (945) (1,506) (1,313) (1,035) (1,412) (3,382) Less: Gain on sale of property, plant and equipment (in Other income, net) - (1,435) (2,011) (667) (919) (689) (10,140) (2,466) (1,747) (3,585) (4,262) Less: loss on non-cash consideration in March 2016 acquisition 635 - Less: Cash interest expense (11,258) (17,567) (19,697) (21,087) (18,822) (22,761) (32,810) (53,525) (70,181) (73,594) (76,505) Less: Maintenance capital expenditures (7,079) (9,451) (12,585) (15,898) (28,861) (38,368) (41,401) (45,316) (51,829) (23,900) (30,271) Distributable cash flow 1 40,529 $ 56,996 $ 49,809 $ 66,831 $ 90,284 $ 117,966 $ 152,976 $ 177,628 $ 190,690 $ 175,696 $ 137,139 $ Distributions declared to all unitholders for the period, including incentive distribution rights 24,575 $ 34,164 $ 39,404 $ 54,913 $ 74,214 $ 91,617 $ 112,705 $ 136,829 $ 154,349 $ 71,646 $ 80,497 $ Distributable cash flow coverage 3 1.65x 1.67x 1.26x 1.22x 1.22x 1.29x 1.36x 1.30x 1.24x 2.45x 1.70x Distributable cash flow coverage (without the benefit of the cost caps) 3,4 1.29x 1.30x 1.07x 0.77x 0.78x 1.02x 1.13x 1.20x 1.24x 2.45x 1.70x EBITDA, as adjusted 1 59,138 $ 86,004 $ 84,643 $ 105,163 $ 139,804 $ 180,729 $ 238,833 $ 280,248 $ 315,482 $ 277,552 $ 251,559 $ Less: Cap on operating and selling, general and administrative costs provided by AROC (8,901) (12,600) (7,798) (24,720) (32,397) (24,758) (25,180) (13,850) - - - EBITDA, as adjusted (without the benefit of the cost caps) 1,4 50,237 $ 73,404 $ 76,845 $ 80,443 $ 107,407 $ 155,971 $ 213,653 $ 266,398 $ 315,482 $ 277,552 $ 251,559 $ Distributable cash flow 1 40,529 $ 56,996 $ 49,809 $ 66,831 $ 90,284 $ 117,966 $ 152,976 $ 177,628 $ 190,690 $ 175,696 $ 137,139 $ Less: Cap on operating and selling, general and administrative costs provided by AROC (8,901) (12,600) (7,798) (24,720) (32,397) (24,758) (25,180) (13,850) - - - Distributable cash flow (without the benefit of the cost caps) 1,4 31,628 $ 44,396 $ 42,011 $ 42,111 $ 57,887 $ 93,208 $ 127,796 $ 163,778 $ 190,690 $ 175,696 $ 137,139 $

© 2018 Archrock, Inc. All rights reserved. Non-GAAP Financial Measures Archrock Partners, L.P. Addendum I-J 1 See Addendum I-A for information on gross margin, EBITDA, as adjusted, EBITDA, as adjusted (without the benefit of the cost caps), distributable cash flow and distributable cash flow (without the benefit of the cost caps). 2 Defined as distributable cash flow divided by distributions declared to all unit holders for the period, including incentive distribution rights. 3 Provisions in the Omnibus Agreement that provided caps on Archrock Partners’ obligation to reimburse us for operating and SG&A expenses terminated on January 1, 2015. Excluding the benefit of the cost caps from Archrock Partners’ previously defined non-GAAP measures of EBITDA, as adjusted, and distributable cash flow provides external users of Archrock Partners’ consolidated financial statements comparable measures to assess operating performance in the current year period with operating performance in the prior year periods. ($ in thousands) 1Q 11 2Q 11 3Q 11 4Q 11 1Q 12 2Q 12 3Q 12 4Q 12 1Q 13 2Q 13 3Q 13 4Q 13 Net income (loss) 223 $ (1,938) $ 3,253 $ 4,515 $ 4,505 $ (19,050) $ 10,380 $ 14,674 $ 14,733 $ 27,896 $ 10,035 $ 11,359 $ Depreciation and amortization 14,149 15,459 19,087 19,235 20,362 22,788 21,930 23,218 22,706 27,030 27,158 26,817 Long-lived asset impairment - 305 384 371 805 28,122 - 633 1,540 925 784 2,101 Restructuring charges - - - - - - - - - - - - Goodwill impairment - - - - - - - - - - - - Selling, general and administrative 10,216 9,927 10,594 8,643 12,222 13,450 11,762 12,455 12,607 15,203 16,948 17,213 Interest expense 7,075 7,553 7,860 7,912 5,882 6,399 6,465 6,421 7,424 10,299 9,735 9,610 Other (income) expense, net (221) 455 (338) (288) 527 (261) (137) (164) (407) (7,270) (639) (1,165) Provision for (benefit from) income taxes 235 256 242 185 281 277 272 115 407 561 309 229 Gross margin 1 31,677 32,017 41,082 40,573 44,584 51,725 50,672 57,352 59,010 74,644 64,330 66,164 Cap on operating costs provided by Archrock ("AROC") 6,877 8,349 6,193 5,073 5,323 3,511 5,841 1,886 3,503 1,729 3,212 3,938 Cap on selling, general and administrative costs provided by AROC 2,252 1,851 1,802 - 2,482 2,810 1,090 1,815 1,854 2,368 4,164 4,412 Non-cash selling, general and administrative costs 364 153 (207) 222 345 140 172 140 253 335 285 301 Expensed acquisition costs (in Other (income) expense, net) - 514 - - 695 - - - 575 - - 246 Less: Selling, general and administrative (10,216) (9,927) (10,594) (8,643) (12,222) (13,450) (11,762) (12,455) (12,607) (15,203) (16,948) (17,213) Less: Other income (expense), net 221 (455) 338 288 (527) 261 137 164 407 7,270 639 1,165 EBITDA, as adjusted 1 31,175 32,502 38,614 37,513 40,680 44,997 46,150 48,902 52,995 71,143 55,682 59,013 Less: (Provision for) benefit from income taxes (235) (256) (242) (185) (281) (277) (272) (115) (407) (561) (309) (229) Less: Gain on sale of property, plant and equipment (in Other (income) expense, net) (212) (115) (319) (273) (174) (244) (127) (144) (935) (7,249) (614) (1,342) Less: Loss on non-cash consideration in March 2016 Acquisition - - - - - - - - - - - - Less: Cash interest expense (4,207) (4,652) (4,951) (5,012) (5,208) (5,718) (5,905) (5,930) (6,198) (9,036) (8,802) (8,774) Less: Maintenance capital expenditures (5,457) (8,454) (7,382) (7,568) (8,117) (11,416) (10,345) (8,490) (8,349) (9,558) (12,675) (10,819) Distributable cash flow 1 21,064 $ 19,025 $ 25,720 $ 24,475 $ 26,900 $ 27,342 $ 29,501 $ 34,223 $ 37,106 $ 44,739 $ 33,282 $ 37,849 $ Distributions declared to all unitholders for the period, including incentive distribution rights 16,243 $ 19,061 $ 19,322 $ 19,581 $ 22,480 $ 22,762 $ 23,044 $ 23,331 $ 27,598 $ 27,927 $ 28,340 $ 28,840 $ Distributable cash flow coverage² 1.30x 1.00x 1.33x 1.25x 1.20x 1.20x 1.28x 1.47x 1.34x 1.60x 1.17x 1.31x Distributable cash flow coverage (without the benefit of the cost caps) 2,3 0.73x 0.46x 0.92x 0.99x 0.85x 0.92x 0.98x 1.31x 1.15x 1.46x 0.91x 1.02x EBITDA, as adjusted 1 31,175 $ 32,502 $ 38,614 $ 37,513 $ 40,680 $ 44,997 $ 46,150 $ 48,902 $ 52,995 $ 71,143 $ 55,682 $ 59,013 $ Less: Cap on operating and selling, general and administrative costs provided by AROC (9,129) (10,200) (7,995) (5,073) (7,805) (6,321) (6,931) (3,701) (5,357) (4,097) (7,376) (8,350) EBITDA, as adjusted (without the benefit of the cost caps) 1,3 22,046 $ 22,302 $ 30,619 $ 32,440 $ 32,875 $ 38,676 $ 39,219 $ 45,201 $ 47,638 $ 67,046 $ 48,306 $ 50,663 $ Distributable cash flow 1 21,064 $ 19,025 $ 25,720 $ 24,475 $ 26,900 $ 27,342 $ 29,501 $ 34,223 $ 37,106 $ 44,739 $ 33,282 $ 37,849 $ Less: Cap on operating and selling, general and administrative costs provided by AROC (9,129) (10,200) (7,995) (5,073) (7,805) (6,321) (6,931) (3,701) (5,357) (4,097) (7,376) (8,350) Distributable cash flow (without the benefit of the cost caps) 1,3 11,935 $ 8,825 $ 17,725 $ 19,402 $ 19,095 $ 21,021 $ 22,570 $ 30,522 $ 31,749 $ 40,642 $ 25,906 $ 29,499 $

© 2018 Archrock, Inc. All rights reserved. Non-GAAP Financial Measures Archrock Partners, L.P. Addendum I-J (Continued) 1 See Addendum I-A for information on gross margin, EBITDA, as adjusted, EBITDA, as adjusted (without the benefit of the cost caps), distributable cash flow and distributable cash flow (without the benefit of the cost caps). 2 Defined as distributable cash flow divided by distributions declared to all unit holders for the period, including incentive distribution rights. 3 Provisions in the Omnibus Agreement that provided caps on Archrock Partners’ obligation to reimburse us for operating and SG&A expenses terminated on January 1, 2015. Excluding the benefit of the cost caps from Archrock Partners’ previously defined non-GAAP measures of EBITDA, as adjusted, and distributable cash flow provides external users of Archrock Partners’ consolidated financial statements comparable measures to assess operating performance in the current year period with operating performance in the prior year periods. ($ in thousands) 1Q 14 2Q 14 3Q 14 4Q 14 1Q 15 2Q 15 3Q 15 4Q 15 1Q 16 2Q 16 Q3 16 Q4 16 Net income (loss) 6,939 $ 17,752 $ 18,103 $ 18,925 $ 20,085 $ 22,327 $ 11,498 $ (137,935) $ 520 $ 3,311 $ (567) $ (14,021) $ Depreciation and amortization 27,921 31,708 33,598 34,969 36,105 39,487 40,262 39,932 39,237 38,627 38,087 37,790 Long-lived asset impairment 2,486 1,991 3,558 4,775 3,484 1,826 7,163 26,514 6,315 8,283 7,909 23,751 Restructuring charges 379 198 125 - - - - - 4,139 1,208 1,946 16 Goodwill impairment - - - - - - - 127,757 - - - - Selling, general and administrative 19,376 19,047 20,734 21,364 21,169 20,721 20,729 22,967 23,679 19,741 17,917 18,380 Interest expense 9,689 14,756 16,141 17,225 17,832 19,082 19,048 18,619 18,742 19,313 20,034 19,774 Other (income) expense, net 871 (134) (649) (162) (191) (1,512) 585 (273) 838 72 (890) (2,614) Provision for (benefit from) income taxes 182 541 (299) 889 643 (72) 131 333 94 187 188 943 Gross margin 1 67,843 85,859 91,311 97,985 99,127 101,859 99,416 97,914 93,564 90,742 84,624 84,019 Cap on operating costs provided by Archrock ("AROC") 2,536 - - - - - - - - - - - Cap on selling, general and administrative costs provided by AROC 3,620 1,399 2,685 3,610 - - - - 199 - - - Non-cash selling, general and administrative costs 756 218 348 54 592 247 98 122 - 281 323 400 Expensed acquisition costs (in Other (income) expense, net) 1,544 - 866 61 - 302 - - 172 - - 351 Less: Selling, general and administrative (19,376) (19,047) (20,734) (21,364) (21,169) (20,721) (20,729) (22,967) (23,679) (19,741) (17,917) (18,380) Less: Other income (expense), net (871) 134 649 162 191 1,512 (585) 273 (838) (72) 890 2,614 EBITDA, as adjusted 1 56,052 68,563 75,125 80,508 78,741 83,199 78,200 75,342 69,418 71,210 67,920 69,004 Less: (Provision for) benefit from income taxes (182) (541) 299 (889) (643) 72 (131) (333) (94) (187) (188) (943) Less: Gain on sale of property, plant and equipment (in Other (income) expense, net) (673) (170) (1,414) (209) (280) (1,782) 566 (251) 53 103 (795) (2,946) Less: Loss on non-cash consideration in March 2016 Acquisition - - - - - - - - 635 - - - Less: Cash interest expense (8,838) (13,563) (14,962) (16,162) (16,768) (17,893) (17,780) (17,740) (18,018) (18,527) (18,449) (18,600) Less: Maintenance capital expenditures (10,216) (11,896) (13,366) (9,838) (10,079) (15,294) (15,691) (10,765) (8,047) (5,878) (4,785) (5,190) Distributable cash flow 1 36,143 $ 42,393 $ 45,682 $ 53,410 $ 50,971 $ 48,302 $ 45,164 $ 46,254 $ 43,947 $ 46,721 $ 43,703 $ 41,325 $ Distributions declared to all unitholders for the period, including incentive distribution rights 33,093 $ 33,649 $ 34,764 $ 35,323 $ 35,903 $ 39,084 $ 39,682 $ 39,680 $ 17,513 $ 17,513 $ 17,513 $ 19,107 $ Distributable cash flow coverage² 1.09x 1.26x 1.31x 1.51x 1.42x 1.24x 1.14x 1.17x 2.51x 2.67x 2.50x 2.16x Distributable cash flow coverage (without the benefit of the cost caps) 2,3 0.91x 1.22x 1.24x 1.41x 1.42x 1.24x 1.14x 1.17x 2.51x 2.67x 2.50x 2.16x EBITDA, as adjusted 1 56,052 $ 68,563 $ 75,125 $ 80,508 $ 78,741 $ 83,199 $ 78,200 $ 75,343 $ 69,418 $ 71,210 $ 67,920 $ 69,004 $ Less: Cap on operating and selling, general and administrative costs provided by AROC (6,156) (1,399) (2,685) (3,610) - - - - - - EBITDA, as adjusted (without the benefit of the cost caps) 1,3 49,896 $ 67,164 $ 72,440 $ 76,898 $ 78,741 $ 83,199 $ 78,200 $ 75,342 $ 69,418 $ 71,210 $ 67,920 $ 69,004 $ Distributable cash flow 1 36,143 $ 42,393 $ 45,682 $ 53,410 $ 50,971 $ 48,302 $ 45,164 $ 46,253 $ 43,947 $ 46,721 $ 43,703 $ 41,325 $ Less: Cap on operating and selling, general and administrative costs provided by AROC (6,156) (1,399) (2,685) (3,610) - - - - - - - - Distributable cash flow (without the benefit of the cost caps) 1,3 29,987 $ 40,994 $ 42,997 $ 49,800 $ 50,971 $ 48,302 $ 45,164 $ 46,253 $ 43,947 $ 46,721 $ 43,703 $ 41,325 $

Non-GAAP Financial Measures Archrock Partners, L.P. 1 See Addendum I-A for information on gross margin, EBITDA, as adjusted, EBITDA, as adjusted (without the benefit of the cost caps), distributable cash flow and distributable cash flow (without the benefit of the cost caps). 2 Defined as distributable cash flow divided by distributions declared to all unit holders for the period, including incentive distribution rights. 3 Provisions in the Omnibus Agreement that provided caps on our obligation to reimburse Archrock for operating and SG&A expenses terminated on January 1, 2015. Excluding the benefit of the cost caps from our previously defined non-GAAP measures of EBITDA, as adjusted, and distributable cash flow provides external users of our consolidated financial statements comparable measures to assess operating performance in the current year period with operating performance in the prior year periods. 4 Excludes impact of Q2-17 distribution paid on the sale of 4,600,000 common units priced on August 3, 2017. Addendum I-J (Continued) © 2018 Archrock Partners, L.P. All rights reserved. ($ in thousands) 1Q 17 2Q 17 4 3Q 17 4Q 17 Net income (loss) (4,316) $ 5,275 $ (4,013) $ 2,633 $ Depreciation and amortization 36,885 36,275 35,787 34,901 Long-lived asset impairment 6,210 3,081 5,368 4,447 Restructuring charges - - - - Goodwill impairment - - - - Selling, general and administrative 20,311 18,303 20,711 22,710 Interest expense 20,223 21,299 21,839 20,930 Debt extinguishment costs 291 - - - Other (income) expense, net 112 (933) (2,793) (770) Provision for (benefit from) income taxes 1,302 960 708 412 Gross margin 1 81,018 84,260 77,607 85,263 Cap on operating costs provided by AROC - - - - Cap on selling, general and administrative costs provided by AROC - - - - Non-cash selling, general and administrative costs 520 37 196 309 Expensed acquisition costs (in Other (income) expense, net) - - - - Less: Selling, general and administrative (20,311) (18,303) (20,711) (22,710) Less: Other income (expense), net (112) 933 2,793 770 EBITDA, as adjusted 1 61,115 66,927 59,885 63,632 Less: (Provision for) benefit from income taxes (1,302) (960) (708) (412) Less: Gain on sale of property, plant and equipment (in Other (income) expense, net) 148 (907) (2,759) (744) Less: Loss on non-cash consideration in March 2016 Acquisition - - - - Less: Cash interest expense (18,254) (19,659) (19,262) (19,330) Less: Maintenance capital expenditures (7,275) (6,320) (7,347) (9,329) Distributable cash flow 1 34,432 $ 39,081 $ 29,809 $ 33,817 $ Distributions declared to all unitholders for the period, including incentive distribution rights 19,101 $ 19,121 $ 20,459 $ 20,455 $ Distributable cash flow coverage² 1.80x 2.04x 1.46x 1.65x Distributable cash flow coverage (without the benefit of the cost caps) 2,3 1.80x 2.04x 1.46x 1.65x EBITDA, as adjusted 1 61,115 $ 66,927 $ 59,885 $ 63,632 $ Less: Cap on operating and selling, general and administrative costs provided by AROC - - - - EBITDA, as adjusted (without the benefit of the cost caps) 1,3 61,115 $ 66,927 $ 59,885 $ 63,632 $ Distributable cash flow 1 34,432 $ 39,081 $ 29,809 $ 33,817 $ Less: Cap on operating and selling, general and administrative costs provided by AROC - - - - Distributable cash flow (without the benefit of the cost caps) 1,3 34,432 $ 39,081 $ 29,809 $ 33,817 $