| $1B | ||
| $100M | ||
| $54M | ||
| $40M | ||
| $32M | ||
| $31M |
Buys | $10,534,536 | 7 | 100 |
Sells | $0 | 0 | 0 |
| WEXFORD CAPITAL LP | Chief Business Officer | 1 | $10.47M | 0 | $0 | $10.47M |
| Amron Arthur H | director | 5 | $51,360 | 0 | $0 | $51,360 |
| Plaumann Mark Lawrence | director | 1 | $15,000 | 0 | $0 | $15,000 |
Mammoth Energy Services, Inc. operates as a company providing a variety of services to the energy sector. Its operations are divided into four main business units: Infrastructure Services, Well Completion Services, Natural Sand Proppant Services, and Drilling Services. The Infrastructure Services division delivers a full spectrum of solutions for electrical power grids, including transmission, distribution, and substation facilities. This encompasses engineering, design, construction, system upgrades, routine maintenance, and repair work for …
Over the last 12 months, insiders at Mammoth Energy Services, Inc. have bought $10.53M and sold $0 worth of Mammoth Energy Services, Inc. stock.
On average, over the past 5 years, insiders at Mammoth Energy Services, Inc. have bought $2.69M and sold $361,662 worth of stock each year.
Highest buying activity among insiders over the last 12 months: WEXFORD CAPITAL LP (Chief Business Officer) — $10.47M. Amron Arthur H (director) — $51,360. Plaumann Mark Lawrence (director) — $15,000.
The last purchase of 5,000 shares for transaction amount of $15,000 was made by Plaumann Mark Lawrence (director) on 2026‑09‑16.
| 2026-09-16 | Plaumann Mark Lawrence | director | 5,000 0.0103% | $3.00 | $15,000 | -5.96% | ||
| 2026-06-17 | WEXFORD CAPITAL LP | Chief Business Officer | 4.02M 7.1485% | $2.60 | $10.47M | -3.62% | ||
| 2026-06-12 | Amron Arthur H | director | 2,000 0.0041% | $3.28 | $6,560 | -10.64% | ||
| 2026-06-11 | Amron Arthur H | director | 2,500 0.0052% | $3.22 | $8,050 | -7.84% | ||
| 2026-05-28 | Amron Arthur H | director | 3,000 0.0063% | $3.25 | $9,750 | -5.76% | ||
| 2026-05-26 | Amron Arthur H | director | 2,500 0.0052% | $3.24 | $8,100 | -6.04% | ||
| 2025-12-11 | Amron Arthur H | director | 10,000 0.0211% | $1.89 | $18,900 | +47.58% | ||
| 2025-05-22 | Sale | SMITH ARTHUR L | director | 20,000 0.0412% | $2.51 | $50,200 | -7.51% | |
| 2025-05-20 | Sale | SMITH ARTHUR L | director | 50,000 0.1064% | $2.51 | $125,500 | -4.49% | |
| 2025-05-19 | Sale | SMITH ARTHUR L | director | 15,000 0.031% | $2.49 | $37,350 | -6.40% | |
| 2024-12-12 | Amron Arthur H | director | 1,000 0.0021% | $2.97 | $2,971 | -16.72% | ||
| 2024-11-25 | Sale | Booker Corey J. | director | 15,000 0.0314% | $3.47 | $52,050 | -26.61% | |
| 2024-11-22 | Sale | Booker Corey J. | director | 10,000 0.0205% | $3.43 | $34,300 | -28.08% | |
| 2024-11-21 | Sale | Booker Corey J. | director | 6,709 0.014% | $3.25 | $21,804 | -21.98% | |
| 2024-11-20 | Sale | Booker Corey J. | director | 5,000 0.0104% | $3.21 | $16,050 | -21.67% | |
| 2024-11-14 | Sale | Booker Corey J. | director | 3,607 0.0076% | $3.50 | $12,625 | -26.52% | |
| 2024-11-13 | Sale | Booker Corey J. | director | 7,100 0.0152% | $3.68 | $26,100 | -27.35% | |
| 2024-11-11 | Sale | Booker Corey J. | director | 3,494 0.0073% | $3.61 | $12,613 | -28.15% | |
| 2024-11-08 | Sale | Booker Corey J. | director | 24 <0.0001% | $3.76 | $90 | -29.01% | |
| 2024-11-07 | Sale | Booker Corey J. | director | 165 0.0004% | $3.90 | $644 | -32.19% |
| WEXFORD CAPITAL LP | Chief Business Officer | 10620789 22.068% | $33.46M | 3 | 0 | +1.2% |
| Amron Arthur H | director | 67135 0.1395% | $211,475.25 | 9 | 0 | <0.0001% |
| Plaumann Mark Lawrence | director | 5000 0.0104% | $15,750.00 | 1 | 0 | |
| JACOBS JOSEPH | 22423743 46.5923% | $70.63M | 3 | 0 | +85.69% | |
| Straehla Arty | Chief Executive Officer | 1012107 2.103% | $3.19M | 2 | 12 | +2.15% |
| Layton Mark E. | CFO and Secretary | 455360 0.9462% | $1.43M | 1 | 6 | +17.54% |
| SMITH ARTHUR L | director | 130034 0.2702% | $409,607.10 | 3 | 5 | +71.39% |
| Palm James D | director | 12700 0.0264% | $40,005.00 | 2 | 0 | +98.13% |
$172,232,855 | 481 | 12.18% | $904.34M | |
$119,496,970 | 138 | 4.50% | $440.45M | |
$8,827,617 | 96 | 36.18% | $348.73M | |
$26,999,442 | 88 | 8.30% | $4.69B | |
$7,179,905 | 73 | 11.32% | $4.13B |
| Increased Positions | 31 | +33.7% | 1M | +3.4% |
| Decreased Positions | 38 | -41.3% | 3M | -8.03% |
| New Positions | 9 | New | 381,123 | New |
| Sold Out Positions | 12 | Sold Out | 326,264 | Sold Out |
| Total Postitions | 85 | -7.61% | 34M | -4.63% |
| Wexford Capital Lp | $43,529.00 | 46.03% | 22.1M | 0 | 0% | 2025-09-30 |
| Adage Capital Partners Gp, L.L.C. | $9,013.00 | 9.53% | 4.58M | 0 | 0% | 2025-09-30 |
| Valueworks Llc | $4,015.00 | 4.25% | 2.04M | -350,826 | -14.69% | 2025-09-30 |
| Blackrock, Inc. | $2,861.00 | 3.03% | 1.45M | -16,636 | -1.13% | 2025-09-30 |
| Vanguard Group Inc | $1,863.00 | 1.97% | 945,630 | -11,611 | -1.21% | 2025-09-30 |
| Dimensional Fund Advisors Lp | $1,845.00 | 1.95% | 936,414 | -57,500 | -5.79% | 2025-09-30 |
| Geode Capital Management, Llc | $1,141.00 | 1.21% | 579,105 | -1,554 | -0.27% | 2025-09-30 |
| State Street Corp | $802.00 | 0.85% | 406,916 | -1,847 | -0.45% | 2025-09-30 |
| Bridgeway Capital Management, Llc | $768.00 | 0.81% | 389,964 | +39,510 | +11.27% | 2025-09-30 |
| Citadel Advisors Llc | $529.00 | 0.56% | 268,315 | +121,833 | +83.17% | 2025-09-30 |