pump-20260528

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): May 28, 2026

ProPetro Holding Corp.

(Exact name of registrant as specified in its charter)

Delaware

001-38035

26-3685382

(State or Other Jurisdiction
of Incorporation)

(Commission
File Number)

(IRS Employer
Identification No.)

One Marienfeld Place, 110 N. Marienfeld Street, Suite 300, Midland, Texas 79701

(Address of principal executive offices) (Zip Code)

Registrant's telephone number, including area code: (432) 688-0012

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:


☐			Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)


☐			Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)


☐			Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))


☐			Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:


Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, par value $0.001 per share	PUMP	New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company

☐

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

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On May 28, 2026, ProPetro Holding Corp. (the “Company”) announced the resignation of Alex V. Volkov from the Company’s Board of Directors (the “Board”). In connection with Mr. Volkov’s resignation, the Company reduced the size of the Board from eight to seven directors. Mr. Volkov had been nominated as a director pursuant to an Investor Rights Agreement between the Company and Pioneer Natural Resources Pumping Services LLC, a Delaware limited liability company (“Pioneer”), an indirect wholly owned subsidiary of Exxon Mobil Corporation, which provides Pioneer certain rights to designate nominees for election to the Board. Mr. Volkov’s decision to resign comes after the sale by Pioneer of all of its remaining outstanding shares of the Company on May 20, 2026, and was not the result of any disagreement with management or the Board on any matter related to the Company’s operations, policies or practices. Following such sale, Pioneer no longer has the right to designate nominees for election to the Board.

SIGNATURE

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

Date: June 1, 2026


PROPETRO HOLDING CORP.

/s/ John J. Mitchell
John J. Mitchell
General Counsel and Corporate Secretary

ProPetro Holding Corp. filed SEC Form 8-K: Leadership Update