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
$2.00
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares
36,061,179
Total reported value
$82,580,791
% of total 13F portfolios
0%
Share change
-366,802
Value change
-$870,794
Number of holders
76
Price from insider filings
$2.00
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 30 Sep 2025, 76 institutional investors reported holding 36,061,179 shares of MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK). This represents 75% 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 74% 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% 15% $50,599,990
ADAGE CAPITAL PARTNERS GP, L.L.C. 9.5% 4,575,000 0% 0.02% $10,476,750
VALUEWORKS LLC 4.2% 2,038,205 -15% 1.4% $4,667,489
BlackRock, Inc. 3% 1,452,463 -1.1% 0% $3,326,140
VANGUARD GROUP INC 2% 945,630 -1.2% 0% $2,165,492
DIMENSIONAL FUND ADVISORS LP 1.9% 936,414 -5.8% 0% $2,144,586
GEODE CAPITAL MANAGEMENT, LLC 1.2% 579,105 -0.27% 0% $1,326,299
STATE STREET CORP 0.84% 406,916 -0.45% 0% $931,838
BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.81% 389,964 +11% 0.02% $893,018
CITADEL ADVISORS LLC 0.56% 268,315 +83% 0% $614,442
Empowered Funds, LLC 0.41% 198,964 +14% 0% $455,628
NORTHERN TRUST CORP 0.4% 192,469 -0.71% 0% $440,755
JPMORGAN CHASE & CO 0.38% 182,781 -1.6% 0% $418,569
CastleKnight Management LP 0.35% 167,433 0% 0.02% $383,422
MORGAN STANLEY 0.3% 145,300 -22% 0% $332,737
RENAISSANCE TECHNOLOGIES LLC 0.28% 133,972 +1.4% 0% $306,796
Bank of New York Mellon Corp 0.28% 133,755 +1.2% 0% $306,299
STIFEL FINANCIAL CORP 0.22% 105,869 0% 0% $242,440
ROYAL BANK OF CANADA 0.17% 83,696 -4% 0% $192,000
SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.15% 72,878 -41% 0% $166,891
DEUTSCHE BANK AG\ 0.15% 72,183 0% $165,299
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.15% 70,674 0% 0% $161,843
BARCLAYS PLC 0.12% 59,269 -11% 0% $135,727
WELLINGTON MANAGEMENT GROUP LLP 0.12% 56,398 -51% 0% $129,151
GOLDMAN SACHS GROUP INC 0.11% 52,081 -2.8% 0% $119,265

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 4 $8 -$11,274 $2.00 1
2025 Q3 36,061,179 $82,580,791 -$870,794 $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