MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK)
CUSIP: 56155L108
Q4 2025 13F Holders as of 31 Dec 2025
- Type / Class
- Equity / Common Stock, $0.01 par value
- Shares outstanding
- 48,165,948
- Total 13F shares
- 34,368,035
- Share change
- -1,694,688
- Total reported value
- $63,578,088
- Price per share
- $1.85
- Number of holders
- 71
- Value change
- -$3,324,677
- Number of buys
- 30
- Number of sells
- 39
Quarterly Holders Quick Answers
What is CUSIP 56155L108?
CUSIP 56155L108 identifies TUSK - MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value in SEC institutional holdings data.
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Recent filing periods for CUSIP 56155L108:
Top shareholders of TUSK - MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| WEXFORD CAPITAL LP |
3/4/5
13F
|
Director, 10%+ Owner · Company |
46%
from 13F
|
22,030,872
|
$95,922,417 | — | 12 Mar 2024 | |
| GPOR Distribution Trust |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
9,829,548
|
$42,797,852 | — | 30 Jun 2021 | |
| ADAGE CAPITAL PARTNERS GP, L.L.C. |
13F
|
Company |
9.5%
|
4,575,000
|
$10,476,750 | — | 30 Sep 2025 | |
| VALUEWORKS LLC |
13D/G
13F
|
Company |
5%
|
2,389,031
|
$6,689,287 | $0 | 30 Jun 2025 | |
| Arty Straehla |
3/4/5
|
Chief Executive Officer, Director |
—
class O/S missing
|
1,013,899
|
$4,414,516 | — | 18 Dec 2023 | |
| BlackRock, Inc. |
13F
|
Company |
3%
|
1,452,463
|
$3,326,140 | — | 30 Sep 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
2%
|
945,630
|
$2,165,492 | — | 30 Sep 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
1.9%
|
936,414
|
$2,144,586 | — | 30 Sep 2025 | |
| Mark E. Layton |
3/4/5
|
CFO and Secretary |
—
class O/S missing
|
418,985
|
$1,824,261 | — | 03 Mar 2023 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
1.2%
|
579,105
|
$1,326,299 | — | 30 Sep 2025 | |
| STATE STREET CORP |
13F
|
Company |
0.84%
|
406,916
|
$931,838 | — | 30 Sep 2025 | |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC |
13F
|
Company |
0.81%
|
389,964
|
$893,018 | — | 30 Sep 2025 | |
| James D. Palm |
3/4/5
|
Director |
—
class O/S missing
|
240,144
|
$876,069 | — | 12 Jun 2024 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
0.56%
|
268,315
|
$614,442 | — | 30 Sep 2025 | |
| Empowered Funds, LLC |
13F
|
Company |
0.41%
|
198,964
|
$455,628 | — | 30 Sep 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.4%
|
192,469
|
$440,755 | — | 30 Sep 2025 | |
| Corey J. Booker |
3/4/5
|
Director |
—
class O/S missing
|
125,488
|
$435,443 | — | 22 Nov 2024 | |
| JPMORGAN CHASE & CO |
13F
|
Company |
0.38%
|
182,781
|
$418,569 | — | 30 Sep 2025 | |
| CastleKnight Management LP |
13F
|
Company |
0.35%
|
167,433
|
$383,422 | — | 30 Sep 2025 | |
| MORGAN STANLEY |
13F
|
Company |
0.3%
|
145,300
|
$332,737 | — | 30 Sep 2025 | |
| Arthur L. Smith |
3/4/5
|
Director |
0.27%
|
130,034
|
$326,385 | -$213,050 | 22 May 2025 | |
| RENAISSANCE TECHNOLOGIES LLC |
13F
|
Company |
0.28%
|
133,972
|
$306,796 | — | 30 Sep 2025 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.28%
|
133,755
|
$306,299 | — | 30 Sep 2025 | |
| STIFEL FINANCIAL CORP |
13F
|
Company |
0.22%
|
105,869
|
$242,440 | — | 30 Sep 2025 | |
| ROYAL BANK OF CANADA |
13F
|
Company |
0.17%
|
83,919
|
$193,000 | — | 30 Sep 2025 | |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP |
13F
|
Company |
0.15%
|
72,878
|
$166,891 | — | 30 Sep 2025 | |
| DEUTSCHE BANK AG\ |
13F
|
Company |
0.15%
|
72,183
|
$165,299 | — | 30 Sep 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.15%
|
70,674
|
$161,843 | — | 30 Sep 2025 | |
| BARCLAYS PLC |
13F
|
Company |
0.12%
|
59,269
|
$135,727 | — | 30 Sep 2025 | |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
|
Company |
0.12%
|
56,398
|
$129,151 | — | 30 Sep 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.11%
|
52,081
|
$119,265 | — | 30 Sep 2025 | |
| JANE STREET GROUP, LLC |
13F
|
Company |
0.11%
|
51,803
|
$118,629 | — | 30 Sep 2025 | |
| Arthur H. Amron |
3/4/5
|
Director |
0.12%
|
57,135
|
$107,985 | +$18,900 | 11 Dec 2025 | |
| MARSHALL WACE, LLP |
13F
|
Company |
0.09%
|
44,517
|
$101,943 | — | 30 Sep 2025 | |
| Paul M. Jacobi |
3/4/5
|
Director |
—
class O/S missing
|
27,856
|
$101,621 | — | 12 Jun 2024 | |
| ACADIAN ASSET MANAGEMENT LLC |
13F
|
Company |
0.08%
|
40,242
|
$90,000 | — | 30 Sep 2025 | |
| Nuveen, LLC |
13F
|
Company |
0.08%
|
36,843
|
$84,370 | — | 30 Sep 2025 | |
| NBC SECURITIES, INC. |
13F
|
Company |
0.08%
|
36,200
|
$82,898 | — | 30 Sep 2025 | |
| RHUMBLINE ADVISERS |
13F
|
Company |
0.07%
|
34,781
|
$79,639 | — | 30 Sep 2025 | |
| OSAIC HOLDINGS, INC. |
13F
|
Company |
0.06%
|
31,103
|
$73,680 | — | 30 Sep 2025 | |
| NewEdge Advisors, LLC |
13F
|
Company |
0.05%
|
25,494
|
$58,381 | — | 30 Sep 2025 | |
| XTX Topco Ltd |
13F
|
Company |
0.05%
|
25,082
|
$57,438 | — | 30 Sep 2025 | |
| STEINBERGANNA WEALTH MANAGEMENT |
13F
|
Company |
0.05%
|
24,265
|
$55,567 | — | 30 Sep 2025 | |
| NJ State Employees Deferred Compensation Plan |
13F
|
Company |
0.05%
|
24,000
|
$54,960 | — | 30 Sep 2025 | |
| UBS Group AG |
13F
|
Company |
0.04%
|
20,468
|
$46,872 | — | 30 Sep 2025 | |
| WELLS FARGO & COMPANY/MN |
13F
|
Company |
0.04%
|
18,903
|
$43,288 | — | 30 Sep 2025 | |
| ROYCE & ASSOCIATES LP |
13F
|
Company |
0.04%
|
17,954
|
$41,115 | — | 30 Sep 2025 | |
| FRANKLIN RESOURCES INC |
13F
|
Company |
0.03%
|
15,791
|
$36,161 | — | 30 Sep 2025 | |
| BNP PARIBAS FINANCIAL MARKETS |
13F
|
Company |
0.03%
|
15,470
|
$35,426 | — | 30 Sep 2025 | |
| HRT FINANCIAL LP |
13F
|
Company |
0.03%
|
15,076
|
$34,000 | — | 30 Sep 2025 |
Institutional Holders of MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK) as of Q4 2025
As of 31 Dec 2025,
MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK) was held by
71 institutional
shareholders
that filed Form 13F with the SEC.
Together, they reported ownership of
34,368,035 shares.
The largest 10 holders included
WEXFORD CAPITAL LP, ADAGE CAPITAL PARTNERS GP, L.L.C., BlackRock, Inc., VANGUARD GROUP INC, DIMENSIONAL FUND ADVISORS LP, GEODE CAPITAL MANAGEMENT, LLC, BRIDGEWAY CAPITAL MANAGEMENT, LLC, STATE STREET CORP, MORGAN STANLEY, and Russell Investments Group, Ltd..
This page lists
71
institutional shareholders reporting positions in this security
for the Q4 2025 filing period.
| Investor | Option | Weight % | Change % | Value $ | * Price | Shares | Share Change | Activity | Report Period |
|---|
Compare Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
76
Q4 2025 holders
71
Holder diff
-5
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 Value $ | Q4 2025 Value $ | Value Diff $ | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.
An asterisk sign (*) next to the price indicates that the price is likely invalid.