As of the latest SEC filings, MAMMOTH ENERGY SERVICES, INC. (TUSK) is held by 95 institutional funds. The largest fund shareholder is VANGUARD TOTAL STOCK MARKET INDEX FUND (VTI), holding an estimated $1,307,545.40 in market value, representing a significant portion of its portfolio.
Funds holding MAMMOTH ENERGY SERVICES, INC. (TUSK)
Source: SEC Form N-PORT institutional portfolio disclosures
- Ticker:
- TUSK
- CIK:
- 0001679268
| Fund | Type | Manager | Weight | Market Value | Shares |
Report Date
|
Filing Date
|
|---|---|---|---|---|---|---|---|
|
VTI
VANGUARD TOTAL STOCK MARKET INDEX FUND
|
ETF | Vanguard | 0.00% | $1,307,545.40 | 533,692 | Mar 31, 2026 | May 28, 2026 |
|
IWM
iShares Russell 2000 ETF
|
ETF | BlackRock / iShares | 0.00% | $1,265,454.40 | 516,512 | Mar 31, 2026 | May 28, 2026 |
|
FSSNX
Fidelity Small Cap Index Fund
|
MF | Fidelity | 0.00% | $682,092.84 | 238,494 | Apr 30, 2026 | Jun 26, 2026 |
|
VEMPX
VANGUARD EXTENDED MARKET INDEX FUND
|
ETF | Vanguard | 0.00% | $666,292.20 | 271,956 | Mar 31, 2026 | May 28, 2026 |
|
BSVO
EA Bridgeway Omni Small-Cap Value ETF
|
ETF | Independent / Boutique | 0.03% | $591,216.85 | 241,313 | Mar 31, 2026 | Jun 1, 2026 |
|
DFAS
Dimensional U.S. Small Cap ETF
|
ETF | Dimensional Fund Advisors | 0.00% | $460,174.00 | 160,900 | Apr 30, 2026 | Jun 29, 2026 |
|
IWN
iShares Russell 2000 Value ETF
|
ETF | BlackRock / iShares | 0.00% | $458,711.05 | 187,229 | Mar 31, 2026 | May 28, 2026 |
|
DFSTX
U.S. SMALL CAP PORTFOLIO
|
MF | Dimensional Fund Advisors | 0.00% | $447,412.68 | 156,438 | Apr 30, 2026 | Jun 24, 2026 |
|
RSCRX
U.S. Small Cap Equity Fund
|
MF | Russell Investments | 0.03% | $310,061.18 | 108,413 | Apr 30, 2026 | Jun 22, 2026 |
|
FSMAX
Fidelity Extended Market Index Fund
|
MF | Fidelity | 0.00% | $289,479.96 | 125,316 | Feb 28, 2026 | Apr 24, 2026 |
|
VTWO
VANGUARD RUSSELL 2000 INDEX FUND
|
ETF | Vanguard | 0.00% | $274,335.60 | 118,760 | Feb 28, 2026 | Apr 28, 2026 |
|
DFSCX
U.S. MICRO CAP PORTFOLIO
|
MF | Dimensional Fund Advisors | 0.00% | $206,346.14 | 72,149 | Apr 30, 2026 | Jun 24, 2026 |
|
DASVX
Dunham Small Cap Value Fund
|
MF | Independent / Boutique | 0.22% | $205,962.90 | 72,015 | Apr 30, 2026 | Jun 25, 2026 |
|
RTSSX
Tax-Managed U.S. Mid & Small Cap Fund
|
MF | Russell Investments | 0.01% | $156,850.98 | 54,843 | Apr 30, 2026 | Jun 22, 2026 |
|
BRSIX
Ultra-Small Company Market Fund
|
MF | Independent / Boutique | 0.12% | $147,000.00 | 60,000 | Mar 31, 2026 | May 21, 2026 |
|
IWC
iShares Micro-Cap ETF
|
ETF | BlackRock / iShares | 0.01% | $144,131.05 | 58,829 | Mar 31, 2026 | May 28, 2026 |
|
SWSSX
Schwab Small-Cap Index Fund
|
MF | Charles Schwab | 0.00% | $137,628.92 | 48,122 | Apr 30, 2026 | Jun 25, 2026 |
|
SLLAX
SIMT Small Cap Fund
|
MF | Independent / Boutique | 0.03% | $122,980.20 | 50,196 | Mar 31, 2026 | May 29, 2026 |
|
-
Master Small Cap Index Series
|
ETF | Independent / Boutique | 0.00% | $110,864.95 | 45,251 | Mar 31, 2026 | May 28, 2026 |
|
DFSVX
U.S. SMALL CAP VALUE PORTFOLIO
|
MF | Dimensional Fund Advisors | 0.00% | $108,508.40 | 37,940 | Apr 30, 2026 | Jun 24, 2026 |
|
FSKAX
Fidelity Total Market Index Fund
|
MF | Fidelity | 0.00% | $95,333.70 | 41,270 | Feb 28, 2026 | Apr 24, 2026 |
|
TRHBX
Nuveen Small Cap Blend Index Fund
|
MF | TIAA / Nuveen | 0.00% | $89,732.50 | 31,375 | Apr 30, 2026 | Jun 24, 2026 |
|
FNCMX
Fidelity Nasdaq Composite Index Fund
|
MF | Fidelity | 0.00% | $84,109.41 | 36,411 | Feb 28, 2026 | Apr 24, 2026 |
|
FCFMX
Fidelity Series Total Market Index Fund
|
MF | Fidelity | 0.00% | $78,701.70 | 34,070 | Feb 28, 2026 | Apr 24, 2026 |
|
FISVX
Fidelity Small Cap Value Index Fund
|
MF | Fidelity | 0.00% | $73,367.70 | 29,946 | Mar 31, 2026 | May 26, 2026 |
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