Who owns MAMMOTH ENERGY SERVICES, INC., from the filings themselves: stakes over 5% (Schedule 13D/G), the institutional managers reporting the stock each quarter (13F), and the funds holding it (N-PORT).
Investors crossing 5% ownership must disclose it. Schedule 13G filers certify the stake is passive; Schedule 13D is the general form for everyone else — founders, strategic holders, and activists alike. Each entry is the holder's most recent disclosure. Coverage begins with SEC's structured filings from December 18, 2024; a holder appears once they file or amend after that date.
Charles E. Davidson: 13.4% · 6,470,441 shares — CD Holding Company, LLC: 8.4% · 4,066,610 shares
Wexford Capital LP: 25.1% · 12,071,823 shares — Wexford GP LLC: 25.1% · 12,071,823 shares — Charles E. Davidson: 25.1% · 12,071,823 shares
1 more 5% stakes behind a free account
See every investor who has disclosed crossing 5% of MAMMOTH ENERGY SERVICES, INC..
Sign up freeEvery institutional manager whose latest 13F reports this stock, largest position first. "% of their portfolio" is the weight inside that manager's own book — how much conviction the position represents; "% of company" is how much of MAMMOTH ENERGY SERVICES, INC. they hold. Together these 127 managers report 58.24% of shares outstanding.
| Investor | Position value | Shares | % of their portfolio | % of company | As of |
|---|---|---|---|---|---|
| WEXFORD CAPITAL LP | $39.2M | 12,071,823 | 5.02% | 25.08% | June 30, 2026 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | $14.9M | 4,575,000 | 0.02% | 9.51% | June 30, 2026 |
125 more institutional holders behind a free account
See every manager reporting MAMMOTH ENERGY SERVICES, INC., how much of the company they hold, and how big the position is inside their own portfolio.
Sign up freeFunds disclosing this stock in their monthly N-PORT portfolio, with the position's share of the fund's net assets. Together these 103 funds hold 8.98% of shares outstanding — counted inside the manager totals above, not on top of them, since a fund's shares also appear in its manager's 13F.
| Fund | Position value | % of net assets | % of company | As of |
|---|---|---|---|---|
| VANGUARD TOTAL STOCK MARKET INDEX FUND | $2.5M | 0.00% | 1.60% | June 30, 2026 |
| iShares Russell 2000 ETF | $1.27M | 0.00% | 1.07% | March 31, 2026 |
101 more funds behind a free account
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