X0609 4 2026-09-16 0 0001679268 MAMMOTH ENERGY SERVICES, INC. TUSK 0001290795 Plaumann Mark Lawrence false 14201 CALIBER DRIVE SUITE 300 OKLAHOMA CITY OK 73134 1 0 0 0 0 Common Stock 2026-09-16 4 P 0 5000 3 A 5000 D The price reported in Column 4 is a weighted average purchase price. These shares were purchased in multiple transactions at prices within a range. The reporting person undertakes to provide to Mammoth Energy Services, Inc., any security holder of Mammoth Energy Services, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price. Of the shares reported herein, 2,100 shares are held in a Roth IRA and 2,900 shares are held in a traditional IRA, each for the benefit of the Reporting Person. /s/ Mark Plaumann 2026-09-17