PUMP Propetro Holding Corp. - 8-K

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.