MAMMOTH ENERGY SERVICES, INC. - TUSK

Detailed investor-level table based on 13F positions.

Shareholders (13F)

Quarter: Q1 2026 · Compare: Q4 2025
13D/13G major owners: Ownership tab.
Methodology: Market value and % of portfolio use SEC reported VALUE ($000). For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received. Details.
Rows: 0
Investor History Status Shares held Market value ($000) % of portfolio Previous % Rank Change in shares % change in shares Source Date reported
WEXFORD CAPITAL LP History Reduced 22,068,212 54,067 7.83% 7.88% 1 -27,856 -0.13% Q1 2026 May 15, 2026
ADAGE CAPITAL PARTNERS GP, L.L.C. History No change 4,575,000 11,208 0.02% 0.01% 2 0 0.0% Q1 2026 May 15, 2026
BlackRock, Inc. History Reduced 1,454,839 3,564 0.0% 0.0% 3 -18,205 -1.24% Q1 2026 May 13, 2026
VANGUARD CAPITAL MANAGEMENT LLC History New 819,120 2,006 0.0% 4 +819,120 New Q1 2026 May 15, 2026
VANGUARD GROUP INC History No change 1,022,411 1,891 0.0% 0.0% 5 0 0.0% Q4 2025 Jan 29, 2026
DIMENSIONAL FUND ADVISORS LP History Reduced 686,199 1,681 0.0% 0.0% 6 -13,479 -1.93% Q1 2026 May 07, 2026
Peapod Lane Capital LLC History New 599,805 1,513 1.24% 7 +599,805 New Q1 2026 May 01, 2026
GEODE CAPITAL MANAGEMENT, LLC History Added to 610,926 1,496 0.0% 0.0% 8 +25,207 4.3% Q1 2026 May 15, 2026
STATE STREET CORP History Added to 421,922 1,033 0.0% 0.0% 9 +13,438 3.29% Q1 2026 May 15, 2026
CITADEL ADVISORS LLC History Added to 341,967 837 0.0% 0.0% 10 +121,856 55.36% Q1 2026 May 15, 2026
BRIDGEWAY CAPITAL MANAGEMENT, LLC History Reduced 332,313 814 0.02% 0.02% 11 -77,678 -18.95% Q1 2026 May 15, 2026
Empowered Funds, LLC History Added to 241,313 591 0.0% 0.01% 12 +22,322 10.19% Q1 2026 May 14, 2026
RENAISSANCE TECHNOLOGIES LLC History Added to 231,972 568 0.0% 0.0% 13 +45,900 24.67% Q1 2026 May 14, 2026
GOLDMAN SACHS GROUP INC History Added to 223,489 547 0.0% 0.0% 14 +133,545 148.48% Q1 2026 May 15, 2026
ACADIAN ASSET MANAGEMENT LLC History Added to 204,105 498 0.0% 0.0% 15 +97,213 90.95% Q1 2026 May 13, 2026
NORTHERN TRUST CORP History Added to 187,128 458 0.0% 0.0% 16 +19,283 11.49% Q1 2026 May 14, 2026
VANGUARD FIDUCIARY TRUST CO History New 170,131 416 0.0% 17 +170,131 New Q1 2026 May 08, 2026
LOS ANGELES CAPITAL MANAGEMENT LLC History New 163,259 399 0.0% 18 +163,259 New Q1 2026 May 08, 2026
Boston Partners History New 154,388 378 0.0% 19 +154,388 New Q1 2026 May 11, 2026
MORGAN STANLEY History Reduced 152,723 374 0.0% 0.0% 20 -139,975 -47.82% Q1 2026 May 15, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC History New 140,145 343 0.0% 21 +140,145 New Q1 2026 May 08, 2026
Bank of New York Mellon Corp History Reduced 132,539 324 0.0% 0.0% 22 -135 -0.1% Q1 2026 May 05, 2026
Centiva Capital, LP History Added to 111,108 272 0.0% 0.0% 23 +69,791 168.92% Q1 2026 May 14, 2026
STIFEL FINANCIAL CORP History No change 105,572 258 0.0% 0.0% 24 0 0.0% Q1 2026 May 12, 2026
OSAIC HOLDINGS, INC. History Reduced 72,419 177 0.0% 0.0% 25 -7,267 -9.12% Q1 2026 May 15, 2026
WELLINGTON MANAGEMENT GROUP LLP History Added to 68,415 167 0.0% 0.0% 26 +12,017 21.31% Q1 2026 May 15, 2026
Russell Investments Group, Ltd. History Reduced 68,030 166 0.0% 0.0% 27 -179,461 -72.51% Q1 2026 May 08, 2026
AQR CAPITAL MANAGEMENT LLC History Added to 66,731 163 0.0% 0.0% 28 +55,476 492.9% Q1 2026 May 15, 2026
CHARLES SCHWAB INVESTMENT MANAGEMENT INC History Reduced 58,861 144 0.0% 0.0% 29 -11,813 -16.71% Q1 2026 May 15, 2026
Squarepoint Ops LLC History Reduced 51,620 126 0.0% 0.0% 30 -24,544 -32.23% Q1 2026 May 15, 2026
Nuveen, LLC History No change 36,843 90 0.0% 0.0% 31 0 0.0% Q1 2026 Apr 30, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLP History Added to 36,299 88 0.0% 0.0% 32 +26,035 253.65% Q1 2026 May 15, 2026
JANE STREET GROUP, LLC History Reduced 34,754 85 0.0% 0.0% 33 -4,898 -12.35% Q1 2026 May 12, 2026
OCCUDO QUANTITATIVE STRATEGIES LP History New 29,336 83 0.0% 34 +29,336 New Q1 2026 May 15, 2026
RHUMBLINE ADVISERS History Added to 32,863 80 0.0% 0.0% 35 +220 0.67% Q1 2026 May 12, 2026
Mariner, LLC History New 26,873 65 0.0% 36 +26,873 New Q1 2026 May 13, 2026
BANK OF AMERICA CORP /DE/ History Added to 25,589 62 0.0% 0.0% 37 +3,517 15.93% Q1 2026 May 15, 2026
LEVIN CAPITAL STRATEGIES, L.P. History New 25,000 61 0.0% 38 +25,000 New Q1 2026 May 13, 2026
Verdad Advisers, LP History New 22,729 55 0.06% 39 +22,729 New Q1 2026 May 15, 2026
Schonfeld Strategic Advisors LLC History New 18,325 44 0.0% 41 +18,325 New Q1 2026 May 15, 2026
STEINBERGANNA WEALTH MANAGEMENT History Added to 18,360 44 0.02% 0.01% 40 +4,745 34.85% Q1 2026 Apr 15, 2026
Creative Planning History Added to 16,950 41 0.0% 0.0% 43 +4,844 40.01% Q1 2026 May 12, 2026
BNP PARIBAS FINANCIAL MARKETS History Reduced 16,747 41 0.0% 0.0% 42 -267 -1.57% Q1 2026 May 12, 2026
Sanctuary Advisors, LLC History New 16,676 40 0.0% 44 +16,676 New Q1 2026 May 05, 2026
Connor, Clark & Lunn Investment Management Ltd. History New 14,510 35 0.0% 45 +14,510 New Q1 2026 May 11, 2026
GSA CAPITAL PARTNERS LLP History New 13,909 34 0.0% 46 +13,909 New Q1 2026 May 08, 2026
SEI INVESTMENTS CO History New 13,579 33 0.0% 48 +13,579 New Q1 2026 May 13, 2026
PRICE T ROWE ASSOCIATES INC /MD/ History No change 13,385 33 0.0% 0.0% 47 0 0.0% Q1 2026 May 15, 2026
Tower Research Capital LLC (TRC) History Added to 12,522 30 0.0% 0.0% 49 +6,971 125.58% Q1 2026 May 15, 2026
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. History Added to 12,570 30 0.0% 0.0% 50 +272 2.21% Q1 2026 May 15, 2026
FMR LLC History Added to 12,142 29 0.0% 0.0% 51 +1,036 9.33% Q1 2026 May 15, 2026
Archer Investment Corp History No change 11,200 27 0.01% 0.0% 52 0 0.0% Q1 2026 May 04, 2026
JPMORGAN CHASE & CO History Reduced 10,275 26 0.0% 0.0% 53 -155,709 -93.81% Q1 2026 May 13, 2026
VALUEWORKS LLC History Reduced 10,720 26 0.01% 0.01% 55 -2,055 -16.09% Q1 2026 May 15, 2026
NEW YORK STATE COMMON RETIREMENT FUND History No change 10,696 26 0.0% 0.0% 54 0 0.0% Q1 2026 May 06, 2026
WELLS FARGO & COMPANY/MN History Reduced 9,469 23 0.0% 0.0% 56 -18,032 -65.57% Q1 2026 May 11, 2026
Police & Firemen's Retirement System of New Jersey History No change 9,637 23 0.0% 0.0% 57 0 0.0% Q1 2026 Apr 29, 2026
Vanguard Global Advisers, LLC History New 8,774 21 0.0% 58 +8,774 New Q1 2026 May 08, 2026
ALLIANCEBERNSTEIN L.P. History Reduced 10,950 20 0.0% 0.0% 59 -440 -3.86% Q1 2026 May 15, 2026
UBS Group AG History Reduced 7,667 18 0.0% 0.0% 60 -9,947 -56.47% Q1 2026 May 05, 2026
CWM, LLC History Added to 5,793 14 0.0% 62 +5,528 2086.04% Q1 2026 May 14, 2026
PNC FINANCIAL SERVICES GROUP, INC. History Added to 5,720 14 0.0% 0.0% 61 +2,098 57.92% Q1 2026 May 08, 2026
BARCLAYS PLC History Reduced 5,581 13 0.0% 0.0% 63 -32,483 -85.34% Q1 2026 May 14, 2026
SIMPLEX TRADING, LLC History New 5,538 13 0.0% 64 +5,538 New Q1 2026 May 14, 2026
Legal & General Group Plc History No change 2,179 5 0.0% 0.0% 65 0 0.0% Q1 2026 May 08, 2026
Ameritas Investment Partners, Inc. History No change 1,924 4 0.0% 0.0% 66 0 0.0% Q1 2026 May 13, 2026
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC History New 1,416 3 0.0% 67 +1,416 New Q1 2026 May 13, 2026
CITIGROUP INC History Added to 1,127 2 0.0% 0.0% 68 +578 105.28% Q1 2026 May 11, 2026
Sterling Capital Management LLC History Reduced 803 1 0.0% 0.0% 69 -871 -52.03% Q1 2026 Apr 22, 2026
ALLIANZ SE History New 800 1 0.0% 70 +800 New Q1 2026 May 11, 2026
Advisory Services Network, LLC History New 500 1 0.0% 71 +500 New Q1 2026 May 15, 2026
Corient Private Wealth LLC History Closed out 0 0 0.0% -97,902 -100.0% Q1 2026 May 15, 2026
LANDSCAPE CAPITAL MANAGEMENT, L.L.C. History Closed out 0 0 0.01% -72,619 -100.0% Q1 2026 May 12, 2026
FRANKLIN RESOURCES INC History Closed out 0 0 0.0% -72,088 -100.0% Q1 2026 May 13, 2026
Quadrature Capital Ltd History Closed out 0 0 0.0% -65,875 -100.0% Q1 2026 May 15, 2026
XTX Topco Ltd History Closed out 0 0 0.0% -45,235 -100.0% Q1 2026 May 15, 2026
MARSHALL WACE, LLP History Closed out 0 0 0.0% -30,801 -100.0% Q1 2026 May 14, 2026
NewEdge Advisors, LLC History Closed out 0 0 0.0% -20,498 -100.0% Q1 2026 May 15, 2026
Virtu Financial LLC History Closed out 0 0 0.0% -17,973 -100.0% Q1 2026 May 14, 2026
Point72 Asset Management, L.P. History Closed out 0 0 0.0% -14,925 -100.0% Q1 2026 May 15, 2026
Invesco Ltd. History Closed out 0 0 0.0% -10,710 -100.0% Q1 2026 May 12, 2026
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM History Closed out 0 0 0.0% -1,487 -100.0% Q1 2026 May 15, 2026
ROYAL BANK OF CANADA History Reduced 1 0 0.0% -1,099 -99.91% Q1 2026 May 15, 2026
AMALGAMATED BANK History Closed out 0 0 0.0% -762 -100.0% Q1 2026 May 08, 2026
Allworth Financial LP History New 202 0 +202 New Q1 2026 May 14, 2026
MAI Capital Management History New 168 0 +168 New Q1 2026 May 15, 2026
ROTHSCHILD INVESTMENT LLC History New 133 0 +133 New Q1 2026 May 07, 2026
Optiver Holding B.V. History Reduced 200 0 -128 -39.02% Q1 2026 May 15, 2026
EverSource Wealth Advisors, LLC History Added to 84 0 +76 950.0% Q1 2026 May 15, 2026
Root Financial Partners, LLC History New 32 0 +32 New Q1 2026 Apr 24, 2026
NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO History Closed out 0 0 -28 -100.0% Q1 2026 May 07, 2026
IFP Advisors, Inc History Reduced 5 0 -26 -83.87% Q1 2026 Apr 13, 2026
True Wealth Design, LLC History Added to 25 0 +21 525.0% Q1 2026 Apr 13, 2026
Essential Partners LLC History New 20 0 +20 New Q1 2026 May 21, 2026
SBI Securities Co., Ltd. History Reduced 101 0 -19 -15.83% Q1 2026 Apr 27, 2026
Arax Advisory Partners History New 17 0 +17 New Q1 2026 May 13, 2026
SJS Investment Consulting Inc. History New 17 0 +17 New Q1 2026 Apr 23, 2026
Wealth Preservation Advisors, LLC History New 15 0 +15 New Q1 2026 May 15, 2026
Farther Finance Advisors, LLC History New 14 0 +14 New Q1 2026 Apr 07, 2026
JPL Wealth Management, LLC History New 9 0 +9 New Q1 2026 May 08, 2026
Caitong International Asset Management Co., Ltd History New 2 0 +2 New Q1 2026 May 11, 2026
Transamerica Financial Advisors, LLC History No change 31 0 0 0.0% Q1 2026 May 15, 2026
Westside Investment Management, Inc. History No change 187 0 0 0.0% Q1 2026 May 04, 2026