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Buy Day today: Good (62) Broad market participation · no major macro event
TUSK

Mammoth Energy Services Inc

Industrials · Conglomerates

3.20$ +6.6% vs. previous close Closing price · As of: Sep 17, 2026

Ownership

Ownership Structure

Who owns Mammoth Energy Services Inc (TUSK)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 74.8% of the shares are freely tradable; institutional investors hold 52.3%.

Institutional ownership ?Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings. 52.3%
Insiders ?Share of the stock held by the executives, founders and major shareholders of the company itself. 15.7%
Float ?Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders. 74.8%
Short % of float ?Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices. 0.4%
Shares Outstanding ?Total number of shares issued. Price times share count gives market cap. 48Mio.

Largest Shareholders

Institutions

Institutions TUSK
Name Stake (%) Shares Change (%) Date
Wexford Capital LP 25.08 12,071,823 -45.3 06/30/2026
Adage Capital Partners Gp LLC 9.51 4,575,000 +0.0 06/30/2026
BlackRock Inc 3.02 1,454,839 -1.2 03/31/2026
Vanguard Capital Management, LLC 1.70 819,120 +0.0 03/31/2026
Peapod Lane Capital LLC 1.68 807,804 +34.7 06/30/2026
Dimensional Fund Advisors, Inc. 1.44 691,667 +0.8 06/30/2026
Geode Capital Management, LLC 1.27 610,926 +4.3 03/31/2026
Citadel Advisors Llc 0.94 452,163 +36.5 06/30/2026
State Street Corp 0.88 421,922 +3.3 03/31/2026

Funds

Funds TUSK
Name Stake (%) Shares Change (%) Date
Vanguard MStar Total Stk Mkt Idx Invest 1.60 767,902 +0.0 07/31/2026

Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.

Data as of: September 17, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)

Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.

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