Mammoth Energy Services TUSK Institutional Ownership

Ownership Summary

Mammoth Energy Services, Inc. (NASDAQ:TUSK) is held by 88 institutional investors per 13F filings through March 2026.

• These investors held 72.5% of outstanding shares in March 2026, up from 72.0% in December 2025.
• They increased total shares held in TUSK by 5.64% quarter over quarter, and investors in Mammoth Energy Services increased 31.34% from a year ago.
• Of these 88 holders, 54 added to their stakes in Mammoth Energy Services, 24 trimmed positions, and 10 made no changes.
• Altogether, these fund groups held 35.06Mn shares in TUSK by March 2026, up by 1.87Mn shares quarter on quarter, and down 2.56Mn shares year over year.
• WEXFORD CAPITAL LP leads ownership in TUSK with 22.07Mn shares as of March 31, 2026, equal to 45.66% of outstanding shares.
• The biggest buyers of Mammoth Energy Services for the quarter ending March 2026 included VANGUARD CAPITAL MANAGEMENT LLC (819.12K), Peapod Lane Capital LLC (599.81K), VANGUARD FIDUCIARY TRUST CO (170.13K), LOS ANGELES CAPITAL MANAGEMENT LLC (163.26K), Boston Partners (154.39K).
• The largest sellers of Mammoth Energy Services for the quarter ending March 2026 were Empowered Funds, LLC (196.67K), Russell Investments Group, Ltd. (179.46K), Jpmorgan Chase & Co (155.71K), Morgan Stanley (139.98K), BRIDGEWAY CAPITAL MANAGEMENT, LLC (77.68K).
• Per Business Quant, the top 10 investors in TUSK for the quarter ending March 2026 include WEXFORD CAPITAL LP (22.07Mn), ADAGE CAPITAL PARTNERS GP, L.L.C. (4.58Mn), BlackRock, Inc. (1.45Mn), VANGUARD CAPITAL MANAGEMENT LLC (819.12K), DIMENSIONAL FUND ADVISORS LP (686.2K), GEODE CAPITAL MANAGEMENT, LLC (610.93K), Peapod Lane Capital LLC (599.81K), State Street Corp (421.92K), BRIDGEWAY CAPITAL MANAGEMENT, LLC (332.31K), CITADEL ADVISORS LLC (331.37K).