Mammoth Energy Services
TUSK
65 hedge funds and large institutions have $76.1M invested in Mammoth Energy Services in 2025 Q1 according to their latest regulatory filings, with 8 funds opening new positions, 20 increasing their positions, 22 reducing their positions, and 9 closing their positions.
0% more funds holding in top 10
Funds holding in top 10: 1 → 1 (0)
0.48% less ownership
Funds ownership: 78.01% → 77.53% (-0.48%)
9% less repeat investments, than reductions
Existing positions increased: 20 | Existing positions reduced: 22
2% less funds holding
Funds holding: 66 → 65 (-1)
11% less first-time investments, than exits
New positions opened: 8 | Existing positions closed: 9
32% less capital invested
Capital invested by funds: $113M → $76.1M (-$36.5M)
44% less call options, than puts
Call options by funds: $50K | Put options by funds: $89K
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Citadel Advisors
Miami,
Florida
|
+$443K |
| 2 |
Millennium Management
New York
|
+$156K |
| 3 |
NS
NBC Securities
Birmingham,
Alabama
|
+$152K |
| 4 |
Adage Capital Partners
Boston,
Massachusetts
|
+$133K |
| 5 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
+$90.5K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
RC
Rangeley Capital
New Canaan,
Connecticut
|
-$604K |
| 2 |
RA
Royce & Associates
New York
|
-$417K |
| 3 |
BCM
Bridgeway Capital Management
Houston,
Texas
|
-$332K |
| 4 |
JP Morgan Chase
New York
|
-$108K |
| 5 |
Goldman Sachs
New York
|
-$60.9K |
TUSK Hedge Fund Activity: Q1 2025 in Review
65 of the 7,458 institutional investors tracked by Wall St. Rank reported a position in Mammoth Energy Services (TUSK) for Q1 2025, worth a combined $76.1M — down 32% from $113M a quarter earlier.
Sellers outnumbered buyers: 9 funds closed out of TUSK and 8 opened new positions — a net loss of 1 holder — while 22 trimmed existing stakes and 20 added.
The largest buyer was Citadel Advisors, adding an estimated $443K. The largest seller was Rangeley Capital, cutting an estimated $604K.
- 65 institutional investors held Mammoth Energy Services (TUSK) as of Q1 2025, down from 66 in Q4 2024.
- Funds reported $76.1M of Mammoth Energy Services stock for Q1 2025, down 32% quarter-over-quarter.
- 8 funds opened new Mammoth Energy Services positions in Q1 2025 and 9 closed out, a net change of -1 holder.
- The largest Mammoth Energy Services buyer in Q1 2025 was Citadel Advisors, an estimated $443K added.
- The largest Mammoth Energy Services seller in Q1 2025 was Rangeley Capital, an estimated $604K sold.
Based on aggregated 13F filings for Q1 2025.