MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK) Institutional Ownership

13F Institutional Holders and Ownership History from Q4 2016 to Q4 2025

Type / Class
Equity / Common Stock, $0.01 par value
Symbol
TUSK on Nasdaq
Shares outstanding
48,165,948
Price per share
$2.31
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
34,368,035
Total reported value
$63,578,088
% of total 13F portfolios
0%
Share change
-1,694,688
Value change
-$3,324,677
Number of holders
71
Price from insider filings
$2.31
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
VALUEWORKS LLC 5% $6,689,287 2,389,031 VALUEWORKS LLC 30 Jun 2025

As of 31 Dec 2025, 71 institutional investors reported holding 34,368,035 shares of MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK). This represents 71% of the company’s total 48,165,948 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK) together control 70% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
WEXFORD CAPITAL LP 46% 22,096,068 0% 11% $40,877,721
ADAGE CAPITAL PARTNERS GP, L.L.C. 9.5% 4,575,000 0% 0.01% $8,463,750
BlackRock, Inc. 3.1% 1,473,044 +1.4% 0% $2,725,131
VANGUARD GROUP INC 2.1% 1,022,411 +8.1% 0% $1,891,461
DIMENSIONAL FUND ADVISORS LP 1.5% 699,678 -25% 0% $1,294,365
GEODE CAPITAL MANAGEMENT, LLC 1.2% 585,719 +1.1% 0% $1,083,694
BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.85% 409,991 +5.1% 0.02% $758,483
STATE STREET CORP 0.85% 408,484 +0.39% 0% $755,695
MORGAN STANLEY 0.61% 292,698 +101% 0% $541,492
Russell Investments Group, Ltd. 0.51% 247,491 +11736% 0% $457,858
CITADEL ADVISORS LLC 0.46% 220,111 -18% 0% $407,205
Empowered Funds, LLC 0.45% 218,991 +10% 0.01% $405,133
RENAISSANCE TECHNOLOGIES LLC 0.39% 186,072 +39% 0% $344,233
NORTHERN TRUST CORP 0.35% 167,845 -13% 0% $310,514
JPMORGAN CHASE & CO 0.34% 165,984 -9.2% 0% $307,070
Bank of New York Mellon Corp 0.28% 132,674 -0.81% 0% $245,447
ACADIAN ASSET MANAGEMENT LLC 0.22% 106,892 +166% 0% $195,000
STIFEL FINANCIAL CORP 0.22% 105,572 -0.28% 0% $195,308
Corient Private Wealth LLC 0.2% 97,902 0% $181,119
GOLDMAN SACHS GROUP INC 0.19% 89,944 +73% 0% $166,396
OSAIC HOLDINGS, INC. 0.17% 79,686 +156% 0% $147,390
Squarepoint Ops LLC 0.16% 76,164 0% $140,903
LANDSCAPE CAPITAL MANAGEMENT, L.L.C. 0.15% 72,619 0.01% $134,345
FRANKLIN RESOURCES INC 0.15% 72,088 +357% 0% $133,363
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.15% 70,674 0% 0% $130,747

Institutional Holders of MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 34,368,035 $63,578,088 -$3,324,677 $1.85 71
2025 Q3 36,061,179 $82,580,792 -$870,793 $2.29 76
2025 Q2 36,401,771 $101,932,908 -$2,372,899 $2.80 65
2025 Q1 37,314,723 $76,123,343 -$545,490 $2.04 65
2024 Q4 37,547,160 $112,640,237 -$189,407 $3.00 65
2024 Q3 37,132,133 $151,869,502 -$5,363,205 $4.09 64
2024 Q2 38,733,905 $127,045,272 -$926,585 $3.28 66
2024 Q1 38,989,636 $141,899,492 -$1,301,256 $3.64 65
2023 Q4 39,323,837 $175,382,941 -$1,190,175 $4.46 67
2023 Q3 39,576,263 $183,640,137 +$4,122,238 $4.64 74
2023 Q2 38,654,601 $186,701,248 +$2,176,068 $4.83 72
2023 Q1 38,362,997 $161,890,696 +$2,610,048 $4.22 76
2022 Q4 37,381,089 $323,249,178 +$3,961,969 $8.65 77
2022 Q3 36,968,448 $126,060,154 +$6,404,759 $3.41 53
2022 Q2 12,646,544 $27,819,093 +$5,672,434 $2.20 47
2022 Q1 10,077,362 $21,461,343 +$4,524,306 $2.13 45
2021 Q4 7,984,109 $14,532,122 +$305,369 $1.82 42
2021 Q3 7,590,887 $22,093,189 +$1,066,479 $2.91 43
2021 Q2 29,197,357 $134,015,916 -$31,266,582 $4.59 49
2021 Q1 28,821,230 $186,224,971 +$33,094,718 $5.32 51
2020 Q4 28,848,837 $128,377,522 +$1,866,250 $4.45 44
2020 Q3 28,572,064 $45,714,403 -$1,383,948 $1.60 33
2020 Q2 29,596,611 $34,924,522 -$976,783 $1.18 46
2020 Q1 30,904,787 $23,136,665 -$2,789,600 $0.75 55
2019 Q4 32,417,235 $71,315,662 -$5,948,187 $2.20 69
2019 Q3 34,467,666 $85,490,044 -$7,637,996 $2.48 86
2019 Q2 36,162,372 $248,800,594 -$31,054,786 $6.88 97
2019 Q1 37,036,859 $616,675,400 +$8,870,807 $16.65 134
2018 Q4 36,425,113 $655,369,091 +$19,861,102 $17.98 127
2018 Q3 35,050,749 $1,021,370,214 -$60,906,238 $29.10 135
2018 Q2 36,821,466 $1,250,503,738 +$129,250,314 $33.96 144
2018 Q1 32,921,605 $1,055,477,610 +$38,860,450 $32.06 104
2017 Q4 31,756,632 $623,406,658 -$22,069,313 $19.63 63
2017 Q3 32,760,972 $552,346,269 -$2,102,616 $16.86 58
2017 Q2 32,689,363 $608,025,810 +$134,972,398 $18.60 65
2017 Q1 28,173,489 $606,010,527 +$9,736,067 $21.51 73
2016 Q4 28,267,810 $429,642,932 +$427,775,931 $15.20 64