MAMMOTH ENERGY SERVICES, INC.

None of our directors or officers adopted orterminated a Rule 10b5-1 trading arrangement or a non-Rule 10b5-1 trading arrangement during the third quarter ended September 30, 2026.

On October 27, 2026, the Company entered into a definitive oral Consulting Services Agreement (the “Agreement”) with Phil Lancaster, a member of the Company's Board of Directors (the “Board”), pursuant to which Mr. Lancaster will provide consulting services to the Company (the “Services”). The Agreement has an initial term of one year, subject to annual review. Pursuant to the Agreement, Mr. Lancaster will receive a consulting fee of $15,000 per month and a one-time cash bonus of $150,000 upon commencement of the Services. Mr. Lancaster will also be eligible to receive a discretionary annual bonus based on the continued growth of the Company. In addition, he may receive bonuses in connection with acquisitions first identified by him, with the amount of each such acquisition bonus determined based upon the purchase price of the applicable acquisition. Mr. Lancaster will continue to receive the fees otherwise payable to him for his service as a member of the Board.