Mammoth Energy Services
TUSK
93 hedge funds and large institutions have $84.7M invested in Mammoth Energy Services in 2026 Q2 according to their latest regulatory filings, with 27 funds opening new positions, 32 increasing their positions, 24 reducing their positions, and 23 closing their positions.
3,858% more call options, than puts
Call options by funds: $475K | Put options by funds: $12K
33% more repeat investments, than reductions
Existing positions increased: 32 | Existing positions reduced: 24
17% more first-time investments, than exits
New positions opened: 27 | Existing positions closed: 23
3% more funds holding
Funds holding: 90 → 93 (+3)
0% more funds holding in top 10
Funds holding in top 10: 1 → 1 (0)
18.39% less ownership
Funds ownership: 72.51% → 54.12% (-18%)
69% less capital inflows, than outflows
Capital inflows: $11.7M | Capital outflows: $37.8M
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Jane Street
New York
|
+$1.42M |
| 2 |
Marshall Wace
London,
United Kingdom
|
+$1.16M |
| 3 |
JHU
Johns Hopkins University
Baltimore,
Maryland
|
+$1.13M |
| 4 |
Arrowstreet Capital
Boston,
Massachusetts
|
+$849K |
| 5 |
Russell Investments Group
London,
United Kingdom
|
+$766K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
WC
Wexford Capital
West Palm Beach,
Florida
|
-$29.2M |
| 2 |
BlackRock
New York
|
-$3.06M |
| 3 |
State Street
Boston,
Massachusetts
|
-$936K |
| 4 |
Geode Capital Management
Boston,
Massachusetts
|
-$892K |
| 5 |
Goldman Sachs
New York
|
-$493K |
TUSK Hedge Fund Activity: Q2 2026 in Review
93 of the 8,354 institutional investors tracked by Wall St. Rank reported a position in Mammoth Energy Services (TUSK) for Q2 2026, worth a combined $84.7M — down 1.4% from $86M a quarter earlier.
Buyers outnumbered sellers: 27 funds opened new TUSK positions and 23 closed out — a net gain of 4 holders — while 32 added to existing stakes and 24 trimmed.
The largest buyer was Jane Street, adding an estimated $1.42M. The largest seller was Wexford Capital, cutting an estimated $29.2M.
- 93 institutional investors held Mammoth Energy Services (TUSK) as of Q2 2026, up from 90 in Q1 2026.
- Funds reported $84.7M of Mammoth Energy Services stock for Q2 2026, down 1.4% quarter-over-quarter.
- 27 funds opened new Mammoth Energy Services positions in Q2 2026 and 23 closed out, a net change of +4 holders.
- The largest Mammoth Energy Services buyer in Q2 2026 was Jane Street, an estimated $1.42M added.
- The largest Mammoth Energy Services seller in Q2 2026 was Wexford Capital, an estimated $29.2M sold.
Based on aggregated 13F filings for Q2 2026.