Mammoth Energy Services
TUSK
77 hedge funds and large institutions have $82.6M invested in Mammoth Energy Services in 2025 Q3 according to their latest regulatory filings, with 16 funds opening new positions, 17 increasing their positions, 30 reducing their positions, and 5 closing their positions.
220% more first-time investments, than exits
New positions opened: 16 | Existing positions closed: 5
17% more funds holding
Funds holding: 66 → 77 (+11)
0% more funds holding in top 10
Funds holding in top 10: 1 → 1 (0)
0.84% less ownership
Funds ownership: 75.67% → 74.83% (-0.84%)
19% less capital invested
Capital invested by funds: $102M → $82.6M (-$19.4M)
43% less repeat investments, than reductions
Existing positions increased: 17 | Existing positions reduced: 30
66% less call options, than puts
Call options by funds: $35K | Put options by funds: $102K
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Citadel Advisors
Miami,
Florida
|
+$300K |
| 2 |
Deutsche Bank
Frankfurt Am Main Ge,
Germany
|
+$178K |
| 3 |
BCM
Bridgeway Capital Management
Houston,
Texas
|
+$97.3K |
| 4 |
Jane Street
New York
|
+$85K |
| 5 |
NA
NewEdge Advisors
New Orleans,
Louisiana
|
+$62.8K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
V
ValueWorks
New York
|
-$864K |
| 2 |
Wellington Management Group
Boston,
Massachusetts
|
-$145K |
| 3 |
Dimensional Fund Advisors
Austin,
Texas
|
-$142K |
| 4 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
-$122K |
| 5 |
Morgan Stanley
New York
|
-$98.4K |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
EP
76
Essential Partners
Rancho Santa Fe,
California
| $5 | -$2 | -1 | -33% |
|
|
AF
77
Allworth Financial
Folsom,
California
| $3 | +$2 | +1 | New |
|
|
PM
78
Penbrook Management
New York
| – | -$65K | -27,000 | Closed |
|
79
Millennium Management
New York
| – | -$61.2K | -21,851 | Closed |
|
80
Wealth Enhancement Advisory Services
Plymouth,
Minnesota
| – | -$33.9K | -12,121 | Closed |
|
81
Group One Trading
Chicago,
Illinois
| – | -$20.1K | -8,164 | Closed |
|
82
Simplex Trading
Chicago,
Illinois
| – | -$5.96K | -2,419 | Closed |
|
TUSK Hedge Fund Activity: Q3 2025 in Review
77 of the 7,621 institutional investors tracked by Wall St. Rank reported a position in Mammoth Energy Services (TUSK) for Q3 2025, worth a combined $82.6M — down 19% from $102M a quarter earlier.
Buyers outnumbered sellers: 16 funds opened new TUSK positions and 5 closed out — a net gain of 11 holders — while 17 added to existing stakes and 30 trimmed.
The largest buyer was Citadel Advisors, adding an estimated $300K. The largest seller was ValueWorks, cutting an estimated $864K.
- 77 institutional investors held Mammoth Energy Services (TUSK) as of Q3 2025, up from 66 in Q2 2025.
- Funds reported $82.6M of Mammoth Energy Services stock for Q3 2025, down 19% quarter-over-quarter.
- 16 funds opened new Mammoth Energy Services positions in Q3 2025 and 5 closed out, a net change of +11 holders.
- The largest Mammoth Energy Services buyer in Q3 2025 was Citadel Advisors, an estimated $300K added.
- The largest Mammoth Energy Services seller in Q3 2025 was ValueWorks, an estimated $864K sold.
Based on aggregated 13F filings for Q3 2025.