144 0000034088 XXXXXXXX LIVE 0001680247 ProPetro Holding Corp. 001-38035 One Marienfeld Place 110 N. Marienfeld Street, Suite 300 Midland TX 79701 432-688-0012 EXXON MOBIL CORP 10% Stockholder Common Stock BofA Securities, Inc.

One Bryant Park 8th Floor New York NY 10036

16600000 296974000.00 122616976 05/20/2026 NYSE Common Stock 12/31/2018 Merger/Acquisition ProPetro Holding Corp. (Issuer) N 16600000 12/31/2018 Not Applicable Y The shares to be sold are held directly by Pioneer Natural Resources Pumping Services LLC, which is a wholly owned subsidiary of Pioneer Natural Resources USA, Inc., which is a wholly owned subsidiary of Pioneer Natural Resources Company, which is a wholly owned subsidiary of Exxon Mobil Corporation. 05/20/2026 /s/ James R. Chapman, Vice President, Treasurer and Investor Relations