Mammoth Energy Services
TUSK
66 hedge funds and large institutions have $102M invested in Mammoth Energy Services in 2025 Q2 according to their latest regulatory filings, with 6 funds opening new positions, 31 increasing their positions, 17 reducing their positions, and 5 closing their positions.
82% more repeat investments, than reductions
Existing positions increased: 31 | Existing positions reduced: 17
34% more capital invested
Capital invested by funds: $76.1M → $102M (+$25.8M)
20% more first-time investments, than exits
New positions opened: 6 | Existing positions closed: 5
2% more funds holding
Funds holding: 65 → 66 (+1)
0% more funds holding in top 10
Funds holding in top 10: 1 → 1 (0)
1.86% less ownership
Funds ownership: 77.53% → 75.67% (-1.9%)
77% less call options, than puts
Call options by funds: $45K | Put options by funds: $199K
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Adage Capital Partners
Boston,
Massachusetts
|
+$1.09M |
| 2 |
JP Morgan Chase
New York
|
+$418K |
| 3 |
Morgan Stanley
New York
|
+$241K |
| 4 |
Royal Bank of Canada
Toronto,
Ontario, Canada
|
+$213K |
| 5 |
Marshall Wace
London,
United Kingdom
|
+$147K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
RA
Royce & Associates
New York
|
-$3.21M |
| 2 |
V
ValueWorks
New York
|
-$1.07M |
| 3 |
RC
Rangeley Capital
New Canaan,
Connecticut
|
-$420K |
| 4 |
Citadel Advisors
Miami,
Florida
|
-$96.2K |
| 5 |
Millennium Management
New York
|
-$94.2K |
TUSK Hedge Fund Activity: Q2 2025 in Review
66 of the 7,596 institutional investors tracked by Wall St. Rank reported a position in Mammoth Energy Services (TUSK) for Q2 2025, worth a combined $102M — up 34% from $76.1M a quarter earlier.
Buyers outnumbered sellers: 6 funds opened new TUSK positions and 5 closed out — a net gain of 1 holder — while 31 added to existing stakes and 17 trimmed.
The largest buyer was Adage Capital Partners, adding an estimated $1.09M. The largest seller was Royce & Associates, cutting an estimated $3.21M.
- 66 institutional investors held Mammoth Energy Services (TUSK) as of Q2 2025, up from 65 in Q1 2025.
- Funds reported $102M of Mammoth Energy Services stock for Q2 2025, up 34% quarter-over-quarter.
- 6 funds opened new Mammoth Energy Services positions in Q2 2025 and 5 closed out, a net change of +1 holder.
- The largest Mammoth Energy Services buyer in Q2 2025 was Adage Capital Partners, an estimated $1.09M added.
- The largest Mammoth Energy Services seller in Q2 2025 was Royce & Associates, an estimated $3.21M sold.
Based on aggregated 13F filings for Q2 2025.