MAMMOTH ENERGY SVCS INC COM is a security (CUSIP 56155L108) tracked across SEC portfolio filings. 89 institutional managers reported $86.7M on Form 13F as of 2026-06-30; 7 registered fund positions totaling $1.4M via N-PORT as of 2026-05-31.
Showing 15 of 89 managers by value.
| Manager | Location | Value | Shares |
|---|---|---|---|
| WEXFORD CAPITAL LP | GREENWICH, CT | $54.1M | 22,068,212 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | Boston, MA | $11.2M | 4,575,000 |
| BlackRock, Inc. | New York, NY | $3.6M | 1,454,839 |
| Peapod Lane Capital LLC | Bedford Hills, NY | $2.6M | 807,804 |
| VANGUARD GROUP INC | Valley Forge, PA | $1.9M | 1,022,411 |
| DIMENSIONAL FUND ADVISORS LP | AUSTIN, TX | $1.7M | 686,199 |
| GEODE CAPITAL MANAGEMENT, LLC | BOSTON, MA | $1.5M | 610,926 |
| STATE STREET CORP | BOSTON, MA | $1.0M | 421,922 |
| Russell Investments Group, Ltd. | Seattle, WA | $1.0M | 317,369 |
| CITADEL ADVISORS LLC | MIAMI, FL | $838K | 331,367 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | HOUSTON, TX | $814K | 332,313 |
| Empowered Funds, LLC | HAVERTOWN, PA | $591K | 241,313 |
| RENAISSANCE TECHNOLOGIES LLC | NEW YORK, NY | $568K | 231,972 |
| GOLDMAN SACHS GROUP INC | NEW YORK, NY | $548K | 223,489 |
| NORTHERN TRUST CORP | CHICAGO, IL | $458K | 187,128 |
| Fund | Registrant | Value | % of fund |
|---|---|---|---|
| VANGUARD EXTENDED MARKET INDEX FUND | VANGUARD INDEX FUNDS | $666K | 0.08% |
| VANGUARD RUSSELL 2000 INDEX FUND | VANGUARD SCOTTSDALE FUNDS | $414K | 0.24% |
| U.S. MICRO CAP PORTFOLIO | DFA INVESTMENT DIMENSIONS GROUP INC | $206K | 0.28% |
| Master Small Cap Index Series | Quantitative Master Series LLC | $111K | 0.23% |
| VANGUARD BALANCED INDEX FUND | VANGUARD VALLEY FORGE FUNDS | $33K | 0.01% |
| DWS Small Cap Index VIP | DEUTSCHE DWS INVESTMENTS VIT FUNDS | $9K | 0.22% |
| Vericimetry U.S. Small Cap Value Fund | VERICIMETRY FUNDS | $3K | 0.20% |