Mammoth Energy Services Inc.
Last updated September 27, 2026
Organization details
- Legal name
- Mammoth Energy Services Inc.
- Ownership
- Public
- Status
- Active
- SIC code
- 1389 — Oil & Gas Field Services, NEC
- Jurisdiction of incorporation
- Delaware
- Headquarters city
- Oklahoma City
- Headquarters state / province
- Oklahoma
- Headquarters country
- United States
- Fiscal year end
- December
- Ticker symbol
- TUSK
- Primary stock exchange
- Nasdaq
Identifiers
- SEC CIK
- 0001679268
- EIN
- 32-0498321
Board of directors
-
Arthur H. Amron · DirectorSince 2023
-
Arthur L. Smith · DirectorSince 2023
-
Arty Straehla · Director · Chief Executive OfficerSince 2023
-
Charles E. Davidson · Director · Chief Business OfficerSince 2024
-
Corey J. Booker · DirectorSince 2023
-
James D. Palm · DirectorSince 2023
-
Joseph Jacobs · Director · Chief Business OfficerSince 2024
-
Mark Lawrence Plaumann · DirectorSince 2026
-
Paul M. Jacobi · Director · Chief Business OfficerSince 2023
-
Phillip Lancaster · DirectorSince 2026
Chief executives
Arty Straehla
· Chief Executive Officer
Dates unknown
Director election results
Annual meeting of June 25, 2026. Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
-
92.0%
-
95.9%
-
96.8%
-
98.7%
-
98.9%
-
99.1%
Board connections
2 of this board's directors also sit on 2 other boards.
- via Mark Lawrence Plaumann
- via Arthur H. Amron
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
- Bought, last 12 months
- $10,517,252
- 7 purchases by 3 insiders
- Sold, last 12 months
- $0
- 0 sales by 0 insiders
| Date | Insider | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Sep 16, 2026 | Mark Lawrence Plaumann Director | Open-market purchase | +5,000 | $3.00 | $15,000 |
| Jun 26, 2026 | Phillip Lancaster Director | Other | +68,152 | — | — |
| Jun 17, 2026 | Paul M. Jacobi Director, Officer (Chief Business Officer) | Other | +3,211 | — | — |
| Jun 17, 2026 | Amron Holdings LLC Director | Other | +19,121 | — | — |
| Jun 17, 2026 | Wexford GP LLC Director, Officer (Chief Business Officer), 10% owner | Other | +1,072,896 | — | — |
| Jun 17, 2026 | CD Holding Company, LLC 10% owner | Other | +2,403,831 | — | — |
| Jun 17, 2026 | Amron Holdings LLC Director | Other | +10,329 | — | — |
| Jun 17, 2026 | Wexford GP LLC Director, Officer (Chief Business Officer), 10% owner | Other | +6,354,667 | — | — |
| Jun 17, 2026 | CD Holding Company, LLC 10% owner | Other | +4,066,610 | — | — |
| Jun 17, 2026 | Wexford GP LLC Director, Officer (Chief Business Officer), 10% owner | Open-market purchase | +4,019,574 | $2.60 | $10,450,892 |
| Jun 12, 2026 | Arthur H. Amron Director | Open-market purchase | +2,000 | $3.28 | $6,560 |
| Jun 11, 2026 | Arthur H. Amron Director | Open-market purchase | +2,500 | $3.22 | $8,050 |
| May 28, 2026 | Arthur H. Amron Director | Open-market purchase | +3,000 | $3.25 | $9,750 |
| May 26, 2026 | Arthur H. Amron Director | Open-market purchase | +2,500 | $3.24 | $8,100 |
| Dec 11, 2025 | Arthur H. Amron Director | Open-market purchase | +10,000 | $1.89 | $18,900 |
Reviews (0)
Sign in to write a review.
No reviews yet. Be the first to write one.