TUSK — MAMMOTH ENERGY SVCS INC
As of Q2 2026, 23 SEC-registered investment managers reported holding TUSK (MAMMOTH ENERGY SVCS INC) in their latest 13F filings, with a combined reported value of $10.54M across 3.24M shares. That is -10.1% by share count (-364.11K shares) versus the previous quarter, while reported value moved +19.7%. Ownership is concentrated: the five largest holders account for 61.6% of reported value and the top ten for 86.9%.
Compared with the prior quarter, 6 opened new positions, 7 added to existing stakes, 10 trimmed, 2 exited entirely. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.
TUSK is classified in the Energy sector.
All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.
| Fund | Quarter | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|---|
| Citadel Advisors history | Q2 2026 | 593.26K | $1.93M | 0.00% | Add |
| Vanguard Group history | Q4 2025 | 1.02M | $1.89M | 0.00% | Add |
| BlackRock Inc history | Q2 2026 | 407.98K | $1.33M | 0.00% | Reduce |
| Marshall Wace history | Q2 2026 | 395.58K | $1.29M | 0.00% | New |
| Geode Capital Management history | Q2 2026 | 306.03K | $995.73K | 0.00% | Reduce |
| Renaissance Technologies history | Q2 2026 | 292.28K | $949.91K | 0.00% | Add |
| Arrowstreet Capital history | Q2 2026 | 290.10K | $942.81K | 0.00% | New |
| AQR Capital Management history | Q2 2026 | 177.82K | $577.93K | 0.00% | Add |
| Morgan Stanley history | Q2 2026 | 133.56K | $434.07K | 0.00% | Reduce |
| Millennium Management history | Q2 2026 | 124.19K | $403.60K | 0.00% | New |
| Bank of America Corp history | Q2 2026 | 97.05K | $315.40K | 0.00% | Add |
| Point72 Asset Management history | Q2 2026 | 72.09K | $234.30K | 0.00% | New |
| BNY Mellon history | Q2 2026 | 62.01K | $201.52K | 0.00% | Reduce |
| Two Sigma Investments history | Q2 2026 | 58.54K | $190.25K | 0.00% | New |
| Northern Trust Corp history | Q2 2026 | 57.18K | $185.84K | 0.00% | Reduce |
| Goldman Sachs Group history | Q2 2026 | 54.93K | $178.52K | 0.00% | Reduce |
| Deutsche Bank AG history | Q3 2025 | 72.18K | $165.30K | 0.00% | New |
| Wellington Management Group history | Q2 2026 | 47.49K | $154.33K | 0.00% | Reduce |
| Franklin Resources history | Q4 2025 | 72.09K | $133.36K | 0.00% | Add |
| UBS Group AG history | Q2 2026 | 29.52K | $95.93K | 0.00% | Add |
New Positions (Q2 2026)
- Marshall Wace 395.58K sh · $1.29M
- Arrowstreet Capital 290.10K sh · $942.81K
- Millennium Management 124.19K sh · $403.60K
- Point72 Asset Management 72.09K sh · $234.30K
- Two Sigma Investments 58.54K sh · $190.25K
- JPMorgan Chase & Co 12.38K sh · $36.04K
Fully Exited (vs previous quarter)
- Legal & General Investment Management America sold 2.18K sh · $5.34K
- T. Rowe Price Associates sold 13.38K sh · $33
Fund Position History — shares by quarter (top 20 funds)
| Fund | Q3 2021 | Q4 2021 | Q1 2022 | Q2 2022 | Q3 2022 | Q4 2022 | Q1 2023 | Q2 2023 | Q3 2023 | Q4 2023 | Q1 2024 | Q2 2024 | Q3 2024 | Q4 2024 | Q1 2025 | Q2 2025 | Q3 2025 | Q4 2025 | Q1 2026 | Q2 2026 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Citadel Advisors | — | — | — | 38.27K | 60.78K | 88.29K | 188.33K | 37.85K | 22.97K | 41.80K | 26.20K | 22.89K | 72.69K | 18.27K | 186.17K | 159.68K | 291.42K | 220.11K | 341.97K | 593.26K |
| BlackRock Inc | — | — | — | — | — | — | — | — | — | — | — | — | 1.46M | 1.48M | 1.46M | 1.47M | 1.45M | 1.47M | 1.45M | 407.98K |
| Marshall Wace | — | — | 42.49K | 209.23K | 154.90K | 162.73K | 86.14K | — | — | — | — | — | — | 14.16K | — | 57.44K | 44.52K | 30.80K | — | 395.58K |
| Geode Capital Management | 302.68K | 280.40K | 189.94K | 193.89K | 194.00K | 191.15K | 201.06K | 424.54K | 468.43K | 483.75K | 487.36K | 519.00K | 528.85K | 537.38K | 545.16K | 580.66K | 579.11K | 585.72K | 610.93K | 306.03K |
| Renaissance Technologies | 139.97K | 116.47K | 240.27K | 204.07K | 199.47K | 203.67K | 250.47K | 188.97K | 152.57K | 142.97K | 134.27K | 130.67K | 133.67K | 133.57K | 135.27K | 132.17K | 133.97K | 186.07K | 231.97K | 292.28K |
| Arrowstreet Capital | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 290.10K |
| AQR Capital Management | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 11.30K | 11.26K | 66.73K | 177.82K |
| Morgan Stanley | 26.73K | 7.79K | 15.26K | 10.59K | 6.56K | 23.33K | 54.51K | 42.71K | 36.42K | 55.17K | 52.95K | 49.92K | 88.82K | 90.98K | 91.23K | 185.26K | 145.30K | 292.70K | 152.72K | 133.56K |
| Millennium Management | 44.70K | 88.91K | 1.37M | 758.62K | 902.49K | 343.91K | 404.97K | — | — | — | — | — | — | — | 58.67K | 21.85K | — | — | — | 124.19K |
| Bank of America Corp | 10.07K | 1.96K | 803 | 803 | 803 | 11 | 2.01K | 20.90K | 17.87K | 25.36K | 10.72K | 15.37K | 15.69K | 22.88K | 14.18K | 13.07K | 11.83K | 22.07K | 25.59K | 97.05K |
| Point72 Asset Management | — | — | — | — | — | 2.48K | 5.13K | — | — | — | — | — | — | — | — | — | — | 14.93K | — | 72.09K |
| BNY Mellon | 91.23K | 91.23K | 91.23K | 90.78K | 68.59K | 72.65K | 73.03K | 132.90K | 131.16K | 159.94K | 155.79K | 166.59K | 149.18K | 121.99K | 121.25K | 132.15K | 133.75K | 132.67K | 132.54K | 62.01K |
| Two Sigma Investments | — | — | 118.96K | 58.31K | 127.12K | 158.92K | 109.41K | 36.24K | — | — | — | — | — | — | — | — | — | — | — | 58.54K |
| Northern Trust Corp | 50.48K | 44.65K | 44.65K | 23.92K | 28.13K | 34.99K | 37.15K | 186.57K | 198.16K | 194.98K | 196.76K | 192.67K | 201.86K | 206.04K | 203.03K | 193.84K | 192.47K | 167.84K | 187.13K | 57.18K |
| Goldman Sachs Group | — | — | — | — | — | 17.30K | 51.49K | 19.73K | 21.92K | 20.25K | 18.99K | 40.04K | 59.45K | 89.44K | 66.59K | 53.60K | 52.08K | 89.94K | 223.49K | 54.93K |
| Wellington Management Group | — | — | — | — | — | — | — | — | — | — | — | — | 48.07K | 49.56K | 61.80K | 115.21K | 56.40K | 56.40K | 68.42K | 47.49K |
| UBS Group AG | 794 | 4.75K | 12 | — | 5.92K | — | 10.54K | 13.91K | 12.76K | 25.50K | 23.30K | 12.05K | 24.49K | 27.89K | 30.22K | 36.67K | 20.47K | 17.61K | 7.67K | 29.52K |
| Fidelity Management & Research (FMR) | — | — | 6.23K | 6.23K | 6.23K | 6.23K | 6.23K | 6.23K | 6.24K | 7.98K | 7.10K | 8.26K | 10.97K | 9.29K | 13.43K | 10.91K | 12.65K | 11.11K | 12.14K | 12.53K |
| JPMorgan Chase & Co | 11.60K | 16 | 3.90K | 3.58K | 16 | 16 | 16 | 18.58K | 15.14K | 23.34K | 54.69K | 24.34K | 11.16K | 63.08K | 22.47K | 185.76K | 182.78K | 165.98K | — | 12.38K |
| Charles Schwab Investment Management | 15.84K | 15.84K | — | — | 10.74K | 10.74K | 10.74K | 63.98K | 63.98K | 63.98K | 63.98K | 63.98K | 63.61K | 70.67K | 70.67K | 70.67K | 70.67K | 70.67K | 58.86K | 10.74K |
▲ Bought Low (fund opened/added, stock rose ≥5% next quarter) ▼ Sold High (fund reduced, stock fell ≥5% next quarter)
Drag / scroll to zoom · Default shows the most recent year · Annotations come from quarterly fund actions in 13F filings · Hover a marker for details