ProPetro Holding Corp. 10-K

Item 9A. Controls and Procedures Evaluation of Disclosure Controls and Procedures We maintain disclosure controls and procedures that are designed to provide reasonable assurance that the information required to be disclosed by us in our reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms and that such information is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure. As required by Rule 13a-15(b) under the Exchange Act, we have evaluated, under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) as of the end of the period covered by this report. Based upon that evaluation, our principal executive officer and principal financial officer concluded that our disclosure controls and procedures were effective at the reasonable assurance level as of December 31, 2020. Management’s Report on Internal Control over Financial Reporting The management of ProPetro Holding Corp. is responsible for establishing and maintaining adequate internal control over financial reporting for the Company, as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act. ProPetro Holding Corp. maintains a system of internal accounting controls designed to provide reasonable assurance, at a reasonable cost, that assets are safeguarded against loss or unauthorized use and that the financial records are adequate and can be relied upon to produce financial statements in accordance with U.S. GAAP. The internal control system is augmented by written policies and procedures, an internal audit program and the selection and training of qualified personnel. This system includes policies that require adherence to ethical business standards and compliance with all applicable laws and regulations. There are inherent limitations to the effectiveness of any control system. A control system, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Also, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within the Company will be detected. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. The Company intends to continually improve and refine its internal controls. Under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, we conducted an evaluation of the effectiveness of the design and operation of our internal control over financial reporting as of December 31, 2020 based on criteria established in the 2013 Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). Based on this evaluation, management believes that ProPetro Holding Corp. maintained effective internal control over financial reporting as of December 31, 2020. The independent registered public accounting firm, Deloitte & Touche LLP, has audited the consolidated financial statements as of and for the year ended December 31, 2020, and has also issued their report on the effectiveness of the Company’s internal control over financial reporting, included in this report on page 53. Changes in Internal Control over Financial Reporting There were no changes in our system of internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that occurred during the quarter ended December 31, 2020 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting. 80 Item 9B. Other Information None. 81 Part III Item 10. Directors, Executive Officers and Corporate Governance This information is incorporated by reference to the Company’s Proxy Statement for its 2021 Annual Meeting of Stockholders, which is expected to be filed before the end April 2021. 82 Item 11. Executive Compensation This information is incorporated by reference to the Company’s Proxy Statement for its 2021 Annual Meeting of Stockholders, which is expected to be filed before the end of April 2021. 83 Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters This information is incorporated by reference to the Company’s Proxy Statement for its 2021 Annual Meeting of Stockholders, which is expected to be filed before the end of April 2021. 84 Item 13. Certain Relationships and Related Party Transactions, and Director Independence. This information is incorporated by reference to the Company’s Proxy Statement for its 2021 Annual Meeting of Stockholders, which is expected to be filed before the end of April 2021. 85 Item 14. Principal Accounting Fees and Services This information is incorporated by reference to the Company’s Proxy Statement for its 2021 Annual Meeting of Stockholders, which is expected to be filed before the end of April 2021. 86 Part IV Item 15. Exhibits and Financial Statement Schedules. (a)(1) Financial Statements The Financial Statements in Item 8 are filed as part of this Annual Report. (a)(2) Financial Statement Schedules None. (a)(3) Exhibits The exhibits required to be filed by this Item 15(b) are set forth in the Exhibit Index included below. (b) See Exhibit Index (c) None 87 EXHIBIT INDEX Exhibit Number Description 2.1 Purchase and Sale Agreement, dated as of November 12, 2018, by and among Pioneer Natural Resources Pumping Services LLC, Pioneer Natural Resources USA, Inc. and ProPetro Holding Corp. (incorporated by reference herein to Exhibit 2.1 to ProPetro Holding Corp.’s Current Report on Form 8-K dated December 31, 2018). 3.1 Certificate of Incorporation of ProPetro Holding Corp., as amended March 16, 2017 (incorporated by reference herein to Exhibit 3.1 to ProPetro Holding Corp.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2017). 3.2 Amended and Restated Bylaws of ProPetro Holding Corp. (incorporated by reference herein to Exhibit 3.2 to ProPetro Holding Corp.’s Current Report on Form 8-K dated June 19, 2019). 3.3 Certificate of Designations of Series B Junior Participating Preferred Stock of ProPetro Holding Corp. (incorporated by reference herein to Exhibit 3.1 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated April 14, 2020). 4.1 Specimen Stock Certificate (incorporated by reference herein to Exhibit 4.1 to ProPetro Holding Corp.’s Registration Statement on Form S-1, dated February 23, 2017 (Registration No. 333-215940). 4.2 Investor Rights Agreement, dated as of December 31, 2018, by and between Pioneer Natural Resources Pumping Services LLC and ProPetro Holding Corp. (incorporated by reference herein to Exhibit 4.1 to ProPetro Holding Corp.’s Current Report on Form 8-K dated December 31, 2018). 4.3 Registration Rights Agreement, dated as of December 31, 2018, by and between Pioneer Natural Resources Pumping Services LLC and ProPetro Holding Corp. (incorporated by reference herein to Exhibit 4.2 to ProPetro Holding Corp.’s Current Report on Form 8-K dated December 31, 2018). 4.4 Description of Registrant’s Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934 (incorporated by reference herein to Exhibit 4.4 to ProPetro Holding Corp.'s Annual Report on Form 10-K for the year ended December 31, 2019). 4.5 Rights Agreement, dated as of April 14, 2020, by and between ProPetro Holding Corp. and American Stock Transfer & Trust Company, LLC (incorporated by reference herein to Exhibit 4.1 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated April 14, 2020) . 10.1 Credit Agreement, dated as of March 22, 2017 by and among ProPetro Holding Corp., ProPetro Services, Inc., Barclays Bank PLC, as the Agent, the Collateral Agent, a Letter of Credit Issuer and the Swingline Lender, and each of the Lenders from time to time party thereto (incorporated by reference herein to Exhibit 10.2 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated March 28, 2017). 10.2# Employment Agreement, dated April 17, 2013, by and between ProPetro Holding Corp. and Dale Redman (incorporated by reference herein to Exhibit 10.3 to ProPetro Holding Corp.’s Registration Statement on Form S-1, dated February 7, 2017 (Registration No. 333-215940)). 10.3# Employment Agreement, dated April 17, 2013, by and between ProPetro Holding Corp. and David Sledge (incorporated by reference herein to Exhibit 10.4 to ProPetro Holding Corp.’s Registration Statement on Form S-1, dated February 7, 2017 (Registration No. 333-215940)). 10.4# Employment Agreement, dated April 17, 2013, by and between ProPetro Holding Corp. and Jeffrey D. Smith (incorporated by reference herein to Exhibit 10.5 to ProPetro Holding Corp.’s Registration Statement on Form S-1, dated February 7, 2017 (Registration No. 333-215940)). 10.5# Stock Option Plan of ProPetro Holding Corp., dated March 4, 2013 (incorporated by reference herein to Exhibit 10.6 to ProPetro Holding Corp.’s Registration Statement on Form S-1, dated February 7, 2017 (Registration No. 333-215940)). 10.6# First Amendment to the Stock Option Plan of ProPetro Holding Corp., dated June 14, 2013 (incorporated by reference herein to Exhibit 10.7 to ProPetro Holding Corp.’s Registration Statement on Form S-1, dated February 7, 2017 (Registration No. 333-215940)). 10.7# Second Amendment to the Stock Option Plan of ProPetro Holding Corp., dated December 2, 2016 (incorporated by reference herein to Exhibit 10.8 to ProPetro Holding Corp.’s Registration Statement on Form S-1, dated February 7, 2017 (Registration No. 333-215940)). 10.8# Non‑Qualified Stock Option Agreement, dated June 14, 2013, by and between ProPetro Holding Corp. and Dale Redman (incorporated by reference herein to Exhibit 10.9 to ProPetro Holding Corp.’s Registration Statement on Form S-1, dated February 7, 2017 (Registration No. 333-215940)). 10.9# Non‑Qualified Stock Option Agreement, dated June 14, 2013, by and between ProPetro Holding Corp. and David Sledge (incorporated by reference herein to Exhibit 10.10 to ProPetro Holding Corp.’s Registration Statement on Form S-1, dated February 7, 2017 (Registration No. 333-215940)). 88 10.10# Non‑Qualified Stock Option Agreement, dated June 14, 2013, by and between ProPetro Holding Corp. and Jeffrey Smith (incorporated by reference herein to Exhibit 10.11 to ProPetro Holding Corp.’s Registration Statement on Form S-1, dated February 7, 2017 (Registration No. 333-215940)). 10.11# Non‑Qualified Stock Option Agreement, dated June 14, 2013, by and between ProPetro Holding Corp. and Spencer D. Armour, III (incorporated by reference herein to Exhibit 10.12 to ProPetro Holding Corp.’s Registration Statement on Form S-1, dated February 7, 2017 (Registration No. 333-215940)). 10.12# Non‑Qualified Stock Option Agreement, dated July 19, 2016, by and between ProPetro Holding Corp. and Dale Redman (incorporated by reference herein to Exhibit 10.13 to ProPetro Holding Corp.’s Registration Statement on Form S-1, dated February 7, 2017 (Registration No. 333-215940)). 10.13# Non‑Qualified Stock Option Agreement, dated July 19, 2016, by and between ProPetro Holding Corp. and David Sledge (incorporated by reference herein to Exhibit 10.14 to ProPetro Holding Corp.’s Registration Statement on Form S-1, dated February 7, 2017 (Registration No. 333-215940)). 10.14# Non‑Qualified Stock Option Agreement, dated July 19, 2016, by and between ProPetro Holding Corp. and Jeffrey D. Smith (incorporated by reference herein to Exhibit 10.15 to ProPetro Holding Corp.’s Registration Statement on Form S-1, dated February 7, 2017 (Registration No. 333-215940)). 10.15# Non‑Qualified Stock Option Agreement, dated July 19, 2016, by and between ProPetro Holding Corp. and Spencer D. Armour, III (incorporated by reference herein to Exhibit 10.16 to ProPetro Holding Corp.’s Registration Statement on Form S-1, dated February 7, 2017 (Registration No. 333-215940)). 10.16# Form of ProPetro Holding Corp. 2017 Incentive Award Plan (incorporated by reference herein to Exhibit 10.18 to ProPetro Holding Corp.’s Registration Statement on Form S-1/A, dated March 7, 2017 (Registration No. 333-215940)). 10.17# ProPetro Holding Corp. 2020 Long Term Incentive Plan (incorporated by reference herein to Exhibit 10.3 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated October 26, 2020 ) . 10.18# Form of ProPetro Holding Corp. Senior Executive Incentive Bonus Plan (incorporated by reference herein to Exhibit 10.19 to ProPetro Holding Corp.’s Registration Statement on Form S-1/A, dated February 23, 2017 (Registration No. 333-215940)). 10.19# Form of ProPetro Holding Corp. 2017 Incentive Award Plan Stock Option Grant Notice and Stock Option Agreement (incorporated by reference h erein to Exhibit 10.22 to ProPetro Holding Corp.’s Registration Statement on Form S-1/A, dated February 23, 2017 (Registration No. 333-215940)). 10.20# Form of ProPetro Holding Corp. Amendment to Non‑Qualified Stock Option Agreement (incorporated by reference herein to Exhibit 10.23 to ProPetro Holding Corp.’s Registration Statement on Form S-1/A, dated February 23, 2017 (Registration No. 333-215940)). 10.21# Amendment to Employment Agreement, dated April 17, 2013, by and between ProPetro Holding Corp. and Dale Redman (incorporated by reference herein to Exhibit 10.24 to ProPetro Holding Corp.’s Registration Statement on Form S-1/A, dated February 23, 2017 (Registration No. 333-215940)). 10.22# 2017 Form of ProPetro Holding Corp. 2017 Incentive Award Plan Performance Restricted Stock Unit Grant Notice and Performance Restricted Stock Unit Agreement (incorporated by reference herein to Exhibit 10.1 to ProPetro Holding Corp.’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2017). 10.23# 2017 Form of ProPetro Holding Corp. 2017 Incentive Award Plan Restricted Stock Unit Grant Notice and Restricted Stock Unit Agreement (Employees) (incorporated by reference herein to Exhibit 10.2 to ProPetro Holding Corp.’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2017). 10.24# 2019 Form of ProPetro Holding Corp. 2017 Incentive Award Plan Restricted Stock Unit Grant Notice and Restricted Stock Unit Agreement (Employees) (incorporated by reference herein to Exhibit 10.26 to ProPetro Holding Corp.’s Annual Report on Form 10-K for the year ended December 31, 2019). 10.25# 2019 Form of ProPetro Holding Corp. 2017 Incentive Award Plan Performance Restricted Stock Unit Grant Notice and Performance Restricted Stock Unit Agreement (incorporated by reference herein to Exhibit 10.27 to ProPetro Holding Corp.’s Annual Report on Form 10-K for the year ended December 31, 2019). 10.26# 2019 Form of ProPetro Holding Corp. 2017 Incentive Award Plan Restricted Stock Unit Grant Notice and Restricted Stock Unit Agreement (Directors) (incorporated by reference herein to Exhibit 10.28 to ProPetro Holding Corp.’s Annual Report on Form 10-K for the year ended December 31, 2019). 10.27# 2019 Form of ProPetro Holding Corp. 2017 Incentive Award Plan Restricted Stock Unit Grant Notice and Restricted Stock Unit Agreement (Holderness) (incorporated by reference herein to Exhibit 10.29 to ProPetro Holding Corp.’s Annual Report on Form 10-K for the year ended December 31, 2019). 10.28# 2019 Form of ProPetro Holding Corp. 2017 Incentive Award Plan Performance Restricted Stock Unit Grant Notice and Performance Restricted Stock Unit Agreement (Holderness) (incorporated by reference herein to Exhibit 10.30 to ProPetro Holding Corp.’s Annual Report on Form 10-K for the year ended December 31, 2019). 10.29#(a) 2020 Form of ProPetro Holding Corp. 2020 Long Term Incentive Plan Restricted Stock Unit Grant Notice and Restricted Stock Unit Agreement (Directors). 89 10.30# Separation and General Release Agreement, dated August 30, 2019, by and between Mark Howell and ProPetro Holding Corp. (incorporated by reference herein to Exhibit 10.1 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated August 30, 2019). 10.31# Separation Agreement and Mutual Release, dated October 4, 2019, by and between Ian Denholm and ProPetro Holding Corp. (incorporated by reference herein to Exhibit 10.6 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated October 9, 2019). 10.32# Separation Agreement and Release, dated December 17 , 2020, by and between David Sledge and ProPetro Holding Corp. (incorporated by reference herein to Exhibit 10.1 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated December 21 , 2020). 10.33# Separation Agreement and Mutual Release, dated October 23, 2020, by and between Darin G. Holderness and ProPetro Holding Corp. (incorporated by reference herein to Exhibit 10.1 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated October 26, 2020) . 10.34# Separation Agreement and Release, dated March 13, 2020 by and between Dale Redman and ProPetro Holding Corp. (incorporated by reference herein to Exhibit 10.1 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated March 16, 2020). 10.35# Letter Agreement, dated October 4, 2019, by and between Phillip Gobe and ProPetro Holding Corp. (incorporated by reference herein to Exhibit 10.1 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated October 9, 2019). 10.36# Letter Agreement, dated October 4, 2019, by and between Dale Redman and ProPetro Holding Corp. (incorporated by reference herein to Exhibit 10.2 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated October 9, 2019) . 10.37# Letter Agreement, dated October 4, 2019, by and between Darin G. Holderness and ProPetro Holding Corp. (incorporated by reference herein to Exhibit 10.3 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated October 9, 2019). 10.38# Letter Agreement, dated October 4, 2019, by and between Jeffrey Smith and ProPetro Holding Corp. (incorporated by reference herein to Exhibit 10.5 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated October 9, 2019). 10.39# Letter Agreement, dated March 13, 2020, by and between Jeff re y D. Smith and ProPetro Holding Corp. (incorporated by reference herein to Exhibit 10.2 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated March 16, 2020). 10.40# ProPetro Services, Inc. Executive Severance Plan (incorporated by reference herein to Exhibit 10.3 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated March 16, 2020). 10.41# Form of Participation Agreement pursuant to the ProPetro Services, Inc. Executive Severance Plan (incorporated by reference herein to Exhibit 10.4 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated March 16, 2020). 10.42# Participation Agreement pursuant to the ProPetro Services, Inc. Executive Severance Plan, between Phillip A. Gobe and ProPetro Services, Inc., dated March 13, 2020 (incorporated by reference herein to Exhibit 10.5 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated March 16, 2020). 10.43# Amended and Restated ProPetro Holding Corp. Executive Incentive Bonus Plan (incorporated by reference herein to Exhibit 10.1 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated February 18, 2020). 10.44# Employment Agreement, dated September 25, 2019, by and between ProPetro Holding Corp. and Newton W. Wilson III (incorporated by reference herein to Exhibit 10.1 to ProPetro Holding Corp.’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2019). 10.45# Amendment No. 1 to Credit Agreement, dated as of February 22, 2018 by and among ProPetro Holding Corp., ProPetro Services, Inc., the Incremental Lenders therein, the Required Lenders and Barclays Bank PLC, as Administrative Agent for the Lenders (incorporated by reference herein to Exhibit 10.1 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated February 27, 2018) . 10.46# Amendment No. 2 to Credit Agreement, dated as of December 19, 2018, by and among ProPetro Holding Corp., ProPetro Services, Inc., the Incremental Lenders therein, the Required Lenders and Barclays Bank PLC, as Administrative Agent for the Lenders (incorporated by reference herein to Exhibit 10.1 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated December 21, 2018). 10.47# Pressure Pumping Services Agreement dated December 31, 2018, between Pioneer Natural Resources USA, Inc. and ProPetro Services, Inc. (incorporated by reference herein to Exhibit 10.31 to ProPetro Holding Corp.’s Annual Report on Form 10-K for the year ended December 31, 2018). 10.48# Form of Indemnification Agreement for Pioneer Designated Directors (incorporated by reference herein to Exhibit 10.32 to ProPetro Holding Corp.’s Annual Report on Form 10-K for the year ended December 31, 2018). 10.49# Form of Indemnification Agreement for Officers and Directors of ProPetro Holding Corp. (incorporated by reference herein to Exhibit 10.33 to ProPetro Holding Corp.’s Annual Report on Form 10-K for the year ended December 31, 2018). 10.50# ProPetro Services, Inc. Amended and Restated Executive Severance Plan (incorporated by reference herein to Exhibit 10.1 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated April 10, 2020). 10.51# ProPetro Services, Inc. Second Amen ded and Restated Executive Severance Plan (incorporated by reference herein to Exhibit 10. 4 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated October 26 , 2020). 90 10.52# Form of Participation Agreement pursuant to the ProPetro Services, Inc. Sec ond Amended and Restated Executive Severance Plan (incorporated by reference herein to Exhibit 10.5 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated October 26, 2020). 10.53 Waiver to Credit Agreement, dated as of March 17, 2020 by and among ProPetro Holding Corp., ProPetro Services, Inc., Barclays Bank PLC, as the Agent, the Collateral Agent, a Letter of Credit Issuer and the Swingline Lender, and each of the Lenders from time to time party thereto (incorporated by reference herein to Exhibit 10.1 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated March 23, 2020). 10.54 Waiver to Credit Agreement, dated as of June 22, 2020 by and among ProPetro Holding Corp., ProPetro Services, Inc., Barclays Bank PLC, as the Agent, the Collateral Agent, a Letter of Credit Issuer and the Swingline Lender, and each of the Lenders from time to time party thereto (incorporated by reference herein to Exhibit 10.1 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated June 23, 2020). 10.55# Participation Agreement pursuant to the ProPetro Services, Inc. Executive Severance Plan, dated March 16, 2020, by and between Newton W. Wilson III and ProPetro Services, Inc. (incorporated by reference herein to Exhibit 10. 51 to ProPetro Holding Corp.’s Annual Report on Form 10-K for the year ended December 31, 2019). 10.56# Letter Agreement, dated April 9, 2020, by and between David Sledge and ProPetro Holding Corp. (incorporated by reference herein to Exhibit 10.3 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated April 10, 2020). 10.57# Amended and Restated ProPetro Holding Corp. Non-Employee Director Compensation Policy (incorporated by reference herein to Exhibit 10.5 3 to ProPetro Holding Corp.’s Annual Report on Form 10-K for the year ended December 31, 2019) . 10.58# 2020 Form of ProPetro Holding Corp. 2017 Incentive Award Plan Restricted Stock Unit Grant Notice and Restricted Stock Unit Agreement (Employees) (incorporated by reference herein to Exhibit 10.54 to ProPetro Holding Corp.’s Annual Report on Form 10-K for the year ended December 31, 2019) . 10.59# 2020 Form of ProPetro Holding Corp. 2017 Incentive Award Plan Performance Restricted Stock Unit Grant Notice and Performance Restricted Stock Unit Agreement (Employees) (incorporated by reference herein to Exhibit 10.55 to ProPetro Holding Corp.’s Annual Report on Form 10-K for the year ended December 31, 2019). 10.60# Participation Agreement pursuant to the ProPetro Services, Inc. A mended and Re stated Executive Severance Plan, dated April 10, 2020, by and between Darin G. Holderness and ProPetro Services, Inc. (incorporated by reference herein to Exhibit 10.2 to ProPetro Holding Corp.’s Current Report on Form 8-K, dated April 10, 2020). 21.1(a) List of Subsidiaries of ProPetro Holding Corp. 23.1(a) Consent of Independent Registered Public Accounting Firm. 31.1(a) Certification of Chief Executive Officer pursuant to Rule 13a-14(a) and Rule 15d-14(a) of the Exchange Act Rules, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. 31.2(a) Certification of Chief Financial Officer pursuant to Rule 13a-14(a) and Rule 15d-14(a) of the Exchange Act Rules, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. 32.1(b) Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. 32.2(b) Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. 101.INS(a) XBRL Instance Document 101.SCH(a) XBRL Taxonomy Extension Schema Document 101.CAL(a) XBRL Taxonomy Extension Calculation Linkbase Document 101.LAB(a) XBRL Taxonomy Extension Label Linkbase Document 101.PRE(a) XBRL Taxonomy Extension Presentation Linkbase Document 101.DEF(a) XBRL Taxonomy Extension Definition Linkbase Document 104(a) Cover Page Interactive Data File - the cover page interactive data file does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document (a) Filed herewith. (b) Furnished herewith. # Compensatory plan, contract or arrangement. Item 16. Form 10-K Summary None. 91 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this Annual Report on Form 10-K to be signed on its behalf by the undersigned, thereunto duly authorized, on March 5, 2021. ProPetro Holding Corp. /s/ Phillip A. Gobe Phillip A. Gobe Chief Executive Officer and Chairman of the Board Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this Annual Report on Form 10-K has been signed by the following persons in the capacities indicated on the date indicated. Signature Title Date /s/ Phillip A. Gobe Chief Executive Officer and Chairman of the Board (Principal Executive Officer) March 5, 2021 Phillip A. Gobe /s/ David S. Schorlemer Chief Financial Officer (Principal Financial Officer) March 5, 2021 David S. Schorlemer /s/ Elo Omavuezi Chief Accounting Officer (Principal Accounting Officer) March 5, 2021 Elo Omavuezi /s/ Spencer D. Armour Director March 5, 2021 Spencer D. Armour, III /s/ Mark Berg Director March 5, 2021 Mark Berg /s/ Anthony Best Director March 5, 2021 Anthony Best /s/ G. Larry. Lawrence Director March 5, 2021 G. Larry Lawrence /s/ Michele V. Choka Director March 5, 2021 Michele V. Choka /s/ Alan E. Douglas Director March 5, 2021 Alan E. Douglas /s/ Jack Moore Director March 5, 2021 Jack Moore 92