OKLAHOMA CITY, OK
MAMMOTH ENERGY SERVICES, INC.TUSK— Latest position per institution from SEC 13F filings
15
Institutional holders
37.54M
Total shares held
95.47M
Estimated value
1.88M
Avg. position size
WEXFORD CAPITAL LP
CIK 1048462
Shares
22.07M
Value
54.07M
Filed
Mar 31, 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.
CIK 1165408
Shares
4.58M
Value
11.21M
Filed
Mar 31, 2026
BLACKROCK, INC.
CIK 2012383
Shares
1.45M
Value
3.56M
Filed
Mar 31, 2026
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
1.41M
Value
4.63M
Filed
Jun 30, 2024
KANEN WEALTH MANAGEMENT LLC
CIK 1681614
Shares
1.32M
Value
4.34M
Filed
Jun 30, 2024
VANGUARD GROUP INC
CIK 102909
Shares
1.02M
Value
1.89M
Filed
Dec 31, 2025
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
819.12K
Value
2.01M
Filed
Mar 31, 2026
DIMENSIONAL FUND ADVISORS LP
CIK 354204
Shares
686.20K
Value
1.68M
Filed
Mar 31, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
610.93K
Value
1.50M
Filed
Mar 31, 2026
PEAPOD LANE CAPITAL LLC
CIK 2050979
Shares
599.80K
Value
1.51M
Filed
Mar 31, 2026
EXENCIAL WEALTH ADVISORS, LLC
CIK 1576151
Shares
507.61K
Value
2.14M
Filed
Mar 31, 2023
STATE STREET CORP
CIK 93751
Shares
421.92K
Value
1.03M
Filed
Mar 31, 2026
CITADEL ADVISORS LLC
CIK 1423053
Shares
341.97K
Value
837.82K
Filed
Mar 31, 2026
BRIDGEWAY CAPITAL MANAGEMENT, LLC
CIK 1107261
Shares
332.31K
Value
814.17K
Filed
Mar 31, 2026
INFORMED MOMENTUM CO LLC
CIK 1510989
Shares
244.51K
Value
2.11M
Filed
Dec 31, 2022
EMPOWERED FUNDS, LLC
CIK 1592828
Shares
241.31K
Value
591.22K
Filed
Mar 31, 2026
RENAISSANCE TECHNOLOGIES LLC
CIK 1037389
Shares
231.97K
Value
568.33K
Filed
Mar 31, 2026
GOLDMAN SACHS GROUP INC
CIK 886982
Shares
223.49K
Value
547.55K
Filed
Mar 31, 2026
X-SQUARE CAPITAL, LLC
CIK 1729300
Shares
215.09K
Value
706.00
Filed
Jun 30, 2024
RANGELEY CAPITAL, LLC
CIK 1517796
Shares
205.88K
Value
420K
Filed
Mar 31, 2025
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | WEXFORD CAPITAL LP | 1048462 | 22.07M | 54.07M | Mar 31, 2026 |
| 2 | ADAGE CAPITAL PARTNERS GP, L.L.C. | 1165408 | 4.58M | 11.21M | Mar 31, 2026 |
| 3 | BLACKROCK, INC. | 2012383 | 1.45M | 3.56M | Mar 31, 2026 |
| 4 | BLACKROCK FINANCE, INC. | 1364742 | 1.41M | 4.63M | Jun 30, 2024 |
| 5 | KANEN WEALTH MANAGEMENT LLC | 1681614 | 1.32M | 4.34M | Jun 30, 2024 |
| 6 | VANGUARD GROUP INC | 102909 | 1.02M | 1.89M | Dec 31, 2025 |
| 7 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 819.12K | 2.01M | Mar 31, 2026 |
| 8 | DIMENSIONAL FUND ADVISORS LP | 354204 | 686.20K | 1.68M | Mar 31, 2026 |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 610.93K | 1.50M | Mar 31, 2026 |
| 10 | PEAPOD LANE CAPITAL LLC | 2050979 | 599.80K | 1.51M | Mar 31, 2026 |
| 11 | EXENCIAL WEALTH ADVISORS, LLC | 1576151 | 507.61K | 2.14M | Mar 31, 2023 |
| 12 | STATE STREET CORP | 93751 | 421.92K | 1.03M | Mar 31, 2026 |
| 13 | CITADEL ADVISORS LLC | 1423053 | 341.97K | 837.82K | Mar 31, 2026 |
| 14 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 1107261 | 332.31K | 814.17K | Mar 31, 2026 |
| 15 | INFORMED MOMENTUM CO LLC | 1510989 | 244.51K | 2.11M | Dec 31, 2022 |
| 16 | EMPOWERED FUNDS, LLC | 1592828 | 241.31K | 591.22K | Mar 31, 2026 |
| 17 | RENAISSANCE TECHNOLOGIES LLC | 1037389 | 231.97K | 568.33K | Mar 31, 2026 |
| 18 | GOLDMAN SACHS GROUP INC | 886982 | 223.49K | 547.55K | Mar 31, 2026 |
| 19 | X-SQUARE CAPITAL, LLC | 1729300 | 215.09K | 706.00 | Jun 30, 2024 |
| 20 | RANGELEY CAPITAL, LLC | 1517796 | 205.88K | 420K | Mar 31, 2025 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.