Mammoth Energy Services, Inc.
TUSK • NASDAQ
Mammoth Energy Services, Inc. is a conglomerates company in the industrials sector on NASDAQ, led by Phil Lancaster, with a market cap of $85.3M. As of Q3 2025, 75% of shares are held by 76 institutional investors, with WEXFORD CAPITAL LP as the largest holder at 45.85%.
Chief Executive OfficerPhil Lancaster
Market Cap$85.3M
Conglomerates
Industrials
Employees733.0
Websitemammothenergy.com
Country
United States of America
Overview
Overview of institutional ownership in TUSK as of Q3 2025 with a market cap of $110.4M
All Institutions
- Institutions
- 76
- Value Held
- $82.6M
- Shares Held
- 36.1M
- Avg Position
- $1.1M
- Median Position
- $42.2K
Hedge Funds
- Hedge Funds
- 6
- Value Held
- $56.6M
- Shares Held
- 24.7M
- Avg Position
- $9.4M
- Median Position
- $498.9K
Ownership Breakdown
Based on market cap of $110.4M as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.
Biggest Investors
Institutions with the largest positions in TUSK as of Q3 2025
| Institution | Position Value |
|---|---|
 WEXFORD CAPITAL LP Hedge Fund•Multi-Strategy | $50.6M 15.33% of portfolio |
A ADAGE CAPITAL PARTNERS GP LLC Institution | $10.5M 0.02% of portfolio |
 VALUEWORKS LLC Hedge Fund•Value | $4.7M 1.36% of portfolio |
B BlackRock, Inc. Institution | $3.3M 0.00% of portfolio |
 VANGUARD GROUP INC Institution | $2.2M 0.00% of portfolio |
 DIMENSIONAL FUND ADVISORS LP Long Only Manager | $2.1M 0.00% of portfolio |
 GEODE CAPITAL MANAGEMENT LLC ETF Provider | $1.3M 0.00% of portfolio |
 STATE STREET CORP Institution | $931.8K 0.00% of portfolio |
B BRIDGEWAY CAPITAL MANAGEMENT INC Long Only Manager | $893.0K 0.02% of portfolio |
 CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy | $614.4K 0.00% of portfolio |
Net Capital Flow
Institutional buying and selling activity for TUSK in Q3 2025
- Traded
- −$786.7K
- Buyers
- 34
- Sellers
- 33
- Total Bought
- +$1.0M
- Total Sold
- −$1.8M
- Avg Position
- $1.0M
Biggest Buyers
| Institution | Net Bought |
|---|---|
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy | +$279.0K +121.8K shares |
 DEUTSCHE BANK AG\ Institution | +$165.3K +72.2K shares |
B BRIDGEWAY CAPITAL MANAGEMENT INC Long Only Manager | +$90.5K +39.5K shares |
J JANE STREET GROUP, LLC Institution | +$79.1K +34.5K shares |
 Goss Wealth Management LLC RIA/Wealth | +$58.4K +25.5K shares |
 Empowered Funds, LLC ETF Provider | +$56.1K +24.5K shares |
S STEINBERGANNA WEALTH MANAGEMENT RIA/Wealth | +$55.6K +24.3K shares |
 FRANKLIN RESOURCES INC Institution | +$36.2K +15.8K shares |
H HRT FINANCIAL LLC Institution | +$34.5K +15.1K shares |
V Virtu Financial LLC Institution | +$32.4K +14.1K shares |
Biggest Sellers
| Institution | Net Sold |
|---|---|
VALUEWORKS LLC Hedge Fund•Value | −$803.4K −350.8K shares |
 WELLINGTON MANAGEMENT CO LLP Long Only Manager | −$134.7K −58.8K shares |
DIMENSIONAL FUND ADVISORS LP Long Only Manager | −$131.7K −57.5K shares |
 SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity | −$113.8K −49.7K shares |
 MORGAN STANLEY RIA/Wealth | −$91.5K −40.0K shares |
 PRICE T ROWE ASSOCIATES INC /MD/ Long Only Manager | −$68.5K −29.9K shares |
 MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy | −$61.2K −21.9K shares |
R ROYCE & ASSOCIATES LLC Institution | −$53.1K −23.2K shares |
B BlackRock, Inc. Institution | −$38.1K −16.6K shares |
 UBS Group AG Institution | −$37.1K −16.2K shares |
Entry and Exit Activity
Institutions that initiated new positions or completely exited TUSK in Q3 2025
- New Positions
- 6
- New Value
- $56.9K
- Exited Positions
- 5
- Exited Value
- $161.2K
New Positions
| Institution | Position Value |
|---|---|
S STEINBERGANNA WEALTH MANAGEMENT RIA/Wealth | $55.6K 24.3K shares |
O Optiver Holding B.V. Institution | $751.0 328.0 shares |
 Transamerica Financial Advisors, Inc. Institution | $357.0 156.0 shares |
 SRS Capital Advisors, Inc. RIA/Wealth | $160.0 70.0 shares |
 Hartland & Co., LLC RIA/Wealth | $26.0 11.0 shares |
 Hanson McClain, Inc. RIA/Wealth | $3.0 1.0 shares |
Exited Positions
| Institution | Previous Position |
|---|---|
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy | $61.2K 21.9K shares |
 Penbrook Management LLC RIA/Wealth | $36.4K 13.0K shares |
$33.9K 12.1K shares | |
G GROUP ONE TRADING, L.P. Institution | $22.9K 8.2K shares |
S SIMPLEX TRADING, LLC Institution | $6.8K 2.4K shares |
Options Activity
Institutions with the largest Call and Put options positions in TUSK as of Q3 2025
- Call Positions
- 0
- Call Value
- -
- Put Positions
- 2
- Put Value
- $98.5K
Call Positions
| Institution | Position Value |
|---|---|
| No call positions found | |
Put Positions
| Institution | Position Value |
|---|---|
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy | $52.9K 231.0 contracts |
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity | $45.6K 199.0 contracts |
Most Committed Institutions
Institutions with TUSK as the highest % of their portfolio as of Q3 2025
| Institution | Portfolio Weight |
|---|---|
WEXFORD CAPITAL LP Hedge Fund•Multi-Strategy | 15.33% $50.6M |
VALUEWORKS LLC Hedge Fund•Value | 1.36% $4.7M |
S STEINBERGANNA WEALTH MANAGEMENT RIA/Wealth | 0.03% $55.6K |
C CastleKnight Management LP Hedge Fund•Event Driven | 0.02% $383.4K |
B BRIDGEWAY CAPITAL MANAGEMENT INC Long Only Manager | 0.02% $893.0K |
A ADAGE CAPITAL PARTNERS GP LLC Institution | 0.02% $10.5M |
 NBC SECURITIES, INC. RIA/Wealth | 0.01% $82.9K |
N | 0.01% $55.0K |
 Archer Investment Corp RIA/Wealth | 0.01% $25.6K |
Empowered Funds, LLC ETF Provider | 0.00% $455.6K |
Hedge Fund Spotlight
Discover hedge funds investing in TUSK
WEXFORD CAPITAL LP
Hedge Fund • Multi-Strategy
Portfolio ManagerCharles Eugene Davidson
- Portfolio Value
- $330.0M
- Positions
- 393
- Last Reported
- Q3 2025
Sector Allocation
Position in Mammoth Energy Services, Inc.
- Market Value
- $50.6M
- Shares Held
- 22.1M
- Portfolio Weight
- 15.33%
- Owned Since
- 2021-Q4
| Top Holding | Sector | Market Value | Weight |
|---|---|---|---|
Conglomerates Industrials | $50.6M | 15.33% | |
Medical - Instruments & Supplies Healthcare | $17.1M | 5.18% | |
Unknown Unknown | $14.1M | 4.28% |
