Mammoth Energy Services, Inc. (TUSK) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

48,358,000Shares Outstanding

34,761,621Shares held by institutions

$85,165,971Value of institutional holdings

71.88%Institutional ownership %

-3.39%Shares Changed QoQ

71No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Mammoth Energy Services, Inc. (NASDAQ:TUSK) is held by 71 institutional investors per 13F filings through December 2025.

They owned 71.7% of outstanding stock in December 2025, down from 74.9% the prior quarter.
They decreased total shares held in TUSK by -3.33% quarter over quarter, and investors in Mammoth Energy Services increased 5.97% from a year ago.
Of these 71 holders, 30 added to their stakes in Mammoth Energy Services, 27 trimmed positions, and 14 made no changes.
In total, institutional investors held 34.67Mn shares in Mammoth Energy Services as of December 2025, down by 1.19Mn shares quarter on quarter, and down 3.0Mn shares year over year.
WEXFORD CAPITAL LP is the top holder of Mammoth Energy Services as of December 31, 2025, with 22.1Mn shares representing 45.69% of outstanding stock.
The largest buyers of Mammoth Energy Services for the quarter ending December 2025 were Russell Investments Group, Ltd. (245.4K), Empowered Funds, LLC (239.02K), Corient Private Wealth LLC (195.8K), Morgan Stanley (147.4K), Goldman Sachs Group Inc (127.81K).
Top sellers of TUSK stock for the quarter ending December 2025 included VALUEWORKS LLC (2.03Mn), DIMENSIONAL FUND ADVISORS LP (236.74K), Jpmorgan Chase & Co (199.58K), Barclays Plc (137.56K), Royal Bank Of Canada (83.04K).
According to Business Quant data, leading holders of TUSK for December 2025 are WEXFORD CAPITAL LP (22.1Mn), ADAGE CAPITAL PARTNERS GP, L.L.C. (4.58Mn), BlackRock, Inc. (1.47Mn), VANGUARD GROUP INC (1.02Mn), DIMENSIONAL FUND ADVISORS LP (699.68K), GEODE CAPITAL MANAGEMENT, LLC (585.72K), Empowered Funds, LLC (437.98K), BRIDGEWAY CAPITAL MANAGEMENT, LLC (409.99K), State Street Corp (408.48K), Morgan Stanley (292.7K).

71 Institutional Holders

34,761,621 Total Shares Held

Rows:

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Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
WEXFORD CAPITAL LP	31 Dec, 2025	22,096,068	0	0.00%	$40,877,721.00
ADAGE CAPITAL PARTNERS GP, L.L.C.	31 Dec, 2025	4,575,000	0	0.00%	$8,463,750.00
BlackRock, Inc.	31 Dec, 2025	1,473,044	20,581	1.42%	$2,725,131.00
VANGUARD GROUP INC	31 Dec, 2025	1,022,411	76,781	8.12%	$1,891,461.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	699,678	-236,736	-25.28%	$1,294,365.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	585,719	6,614	1.14%	$1,083,694.00
Empowered Funds, LLC	31 Dec, 2025	437,982	239,018	120.13%	$810,266.00
BRIDGEWAY CAPITAL MANAGEMENT, LLC	31 Dec, 2025	409,991	20,027	5.14%	$758,483.00
State Street Corp	31 Dec, 2025	408,484	1,568	0.39%	$755,695.00
Morgan Stanley	31 Dec, 2025	292,698	147,398	101.44%	$541,492.00
Russell Investments Group, Ltd.	31 Dec, 2025	247,491	245,400	11,736.01%	$457,858.00
CITADEL ADVISORS LLC	31 Dec, 2025	220,111	-48,204	-17.97%	$407,205.00
Corient Private Wealth LLC	31 Dec, 2025	195,804	195,804	0.00%	$362,238.00
RENAISSANCE TECHNOLOGIES LLC	31 Dec, 2025	186,072	52,100	38.89%	$344,233.00
Goldman Sachs Group Inc	31 Dec, 2025	179,888	127,807	245.40%	$332,792.00
Northern Trust Corp	31 Dec, 2025	167,845	-24,624	-12.79%	$310,514.00
Jpmorgan Chase & Co	31 Dec, 2025	165,984	-199,578	-54.59%	$307,070.00
Bank of New York Mellon Corp	31 Dec, 2025	132,674	-1,081	-0.81%	$245,447.00
ACADIAN ASSET MANAGEMENT LLC	31 Dec, 2025	106,892	66,650	165.62%	$195.00
Stifel Financial Corp	31 Dec, 2025	105,572	-297	-0.28%	$195,308.00

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