SEC Form 4 · accession 0001628280-26-062552
MAMMOTH ENERGY SERVICES, INC. · TUSK
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Mark Lawrence Plaumann
Director
Period of report
Sep 16, 2026
Accepted (ET)
Sep 17, 2026 · 4:50 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001679268
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF1,F2 | Sep 16, 2026 | P | 5,000 | $3.00 | A | 5,000 | D |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1The 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.
- F2Of 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.