MAMMOTH ENERGY SERVICES, INC. TUSK
CIK 0001679268 · CUSIP 56155L108
Quarter-end disclosures, not live holdings.
Top 20 institutions
Weight means this stock's share of the manager's own portfolio.
| # | Manager | Value | Manager weight | Change vs prior | Source | |
|---|---|---|---|---|---|---|
| 01 | WEXFORD CAPITAL LP CIK 1048462 · View history | $80.19M 22,030,872 shares | 16.38% | +1(0.0%)Added | SEC filing ↗ May 15, 2024 | ▾ |
| 02 | ADAGE CAPITAL PARTNERS GP, L.L.C. CIK 1165408 · View history | $15.93M 4,375,000 shares | 0.03% | +100.00K(+2.3%)Added | SEC filing ↗ May 15, 2024 | ▾ |
| 03 | VALUEWORKS LLC CIK 1282189 · View history | $12.14M 3,343,618 shares | 3.94% | -6.10K(-0.2%)Reduced | SEC filing ↗ May 13, 2024 | ▾ |
| 04 | Kanen Wealth Management LLC CIK 1681614 · Amended · View history | $5.31M 1,460,151 shares | 3.38% | -230.42K(-13.6%)Reduced | SEC filing ↗ Sep 6, 2024 | ▾ |
| 05 | BlackRock Inc. CIK 1364742 · View history | $5.25M 1,443,615 shares | 0.00% | -53.33K(-3.6%)Reduced | SEC filing ↗ May 10, 2024 | ▾ |
| 06 | ROYCE & ASSOCIATES LP CIK 906304 · View history | $4.64M 1,274,565 shares | 0.04% | -9.89K(-0.8%)Reduced | SEC filing ↗ May 13, 2024 | ▾ |
| 07 | VANGUARD GROUP INC CIK 102909 · View history | $2.63M 723,772 shares | 0.00% | +17.37K(+2.5%)Added | SEC filing ↗ May 10, 2024 | ▾ |
| 08 | DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history | $2.57M 707,187 shares | 0.00% | +62.20K(+9.6%)Added | SEC filing ↗ May 10, 2024 | ▾ |
| 09 | GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history | $1.77M 487,355 shares | 0.00% | +3.60K(+0.7%)Added | SEC filing ↗ May 13, 2024 | ▾ |
| 10 | STATE STREET CORP CIK 93751 · View history | $1.48M 407,666 shares | 0.00% | +2.60K(+0.6%)Added | SEC filing ↗ May 15, 2024 | ▾ |
| 11 | BRIDGEWAY CAPITAL MANAGEMENT, LLC CIK 1107261 · View history | $1.43M 393,523 shares | 0.03% | +30.43K(+8.4%)Added | SEC filing ↗ May 15, 2024 | ▾ |
| 12 | X-Square Capital, LLC CIK 1729300 · View history | $783.00K 215,092 shares | 0.37% | 0(0.0%)Unchanged | SEC filing ↗ May 14, 2024 | ▾ |
| 13 | ACADIAN ASSET MANAGEMENT LLC CIK 916542 · View history | $756.00K 207,961 shares | 0.00% | -36.02K(-14.8%)Reduced | SEC filing ↗ May 10, 2024 | ▾ |
| 14 | NORTHERN TRUST CORP CIK 73124 · View history | $716.22K 196,765 shares | 0.00% | +1.79K(+0.9%)Added | SEC filing ↗ May 14, 2024 | ▾ |
| 15 | CastleKnight Management LP CIK 1835751 · View history | $609.46K 167,433 shares | 0.09% | 0(0.0%)Unchanged | SEC filing ↗ May 15, 2024 | ▾ |
| 16 | Bank of New York Mellon Corp CIK 1390777 · View history | $567.09K 155,795 shares | 0.00% | -4.14K(-2.6%)Reduced | SEC filing ↗ Apr 25, 2024 | ▾ |
| 17 | RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history | $489.00K 134,272 shares | 0.00% | -8.70K(-6.1%)Reduced | SEC filing ↗ May 13, 2024 | ▾ |
| 18 | STIFEL FINANCIAL CORP CIK 720672 · View history | $389.74K 107,072 shares | 0.00% | 0(0.0%)Unchanged | SEC filing ↗ May 14, 2024 | ▾ |
| 19 | Empowered Funds, LLC CIK 1592828 · Amended · View history | $267.26K 73,423 shares | 0.00% | +5.42K(+8.0%)Added | SEC filing ↗ May 6, 2024 | ▾ |
| 20 | Invesco Ltd. CIK 914208 · View history | $251.29K 69,035 shares | 0.00% | -29.62K(-30.0%)Reduced | SEC filing ↗ May 14, 2024 | ▾ |
Showing 20 / 68 institutions. The complete set is available through the API.
Coverage & totals by quarter
Reporting institutions by quarter
Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.
Explore all 68 reporting institutions.
This page includes 20 of 68 reporting institutions. Sign in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.
- Download CSV
- Earlier quarters
- Advanced screening & filtering
- API & AI access
+ New accounts get free API credits to explore data beyond ownership filings.
For AI agents & developers
The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. This page lists 20 of 68 reporting institutions; totals use the complete disclosed data.
Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP.
MCP https://api.akkrudata.ai/mcp
get_institutional_security_holders
{"cusip":"56155L108","quarter":"2024Q1","type":"positions","page_size":100}Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.
- MCP endpoint
- https://api.akkrudata.ai/mcp
- API / MCP documentation
- /documents
- llms.txt
- /llms.txt
Sources, coverage & how to read this data
Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.