Mammoth Energy Services, Inc. (TUSK) has 20 known insider and institutional holders on record. The largest holder is JACOBS JOSEPH with 22,423,743 shares. Other notable holders include MEH SUB LLC and WEXFORD CAPITAL LP.
Over the last 12 months, insiders have made 4 transactions in TUSK stock — 1 buys (valued at $18.9K) and 3 sells (valued at $213.05K). Insider selling has exceeded buying during this period.
TUSK Insider Ownership
Top Holder
JACOBS JOSEPH
22,423,743 shares
Buys (12 mo)
1
$18.9K value
Sells (12 mo)
3
$213.05K value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Jacobs Joseph |
Director |
22,423,743 |
2022-06-21 |
|
| 2 |
Meh Sub Llc |
10 Percent Owner |
21,978,893 |
2018-08-01 |
|
| 3 |
Wexford Capital Lp |
10 Percent Owner |
21,690,075 |
2024-03-14 |
|
| 4 |
Mammoth Energy Holdings Llc |
10 Percent Owner |
20,445,923 |
2016-10-21 |
|
| 5 |
Gulfport Energy Corp |
Director |
9,829,548 |
2018-08-01 |
|
| 6 |
Gpor Distribution Trust |
10 Percent Owner |
9,829,548 |
2021-07-12 |
|
| 7 |
Straehla Arty |
Chief Executive Officer |
1,052,107 |
2023-12-19 |
|
| 8 |
Layton Mark E. |
CFO and Secretary |
418,985 |
2023-03-07 |
|
| 9 |
Palm James D |
Director |
240,144 |
2024-06-14 |
|
| 10 |
Booker Corey J. |
Director |
140,488 |
2024-11-26 |
|
| 11 |
Smith Arthur L |
Director |
130,034 |
2025-05-27 |
|
| 12 |
Amron Arthur H |
Director |
57,135 |
2025-12-15 |
|
| 13 |
Yellen Jonathan H |
Director |
36,674 |
2019-11-20 |
|
| 14 |
Jacobi Paul M. |
Director |
27,856 |
2024-06-14 |
|
| 15 |
Laforge Rusty Neal |
VP, Gen. Couns., Asst. Sec. |
20,000 |
2018-08-09 |
|
| 16 |
Ross Matthew |
Director |
19,815 |
2019-11-22 |
|
| 17 |
Mccarthy Marc T |
Director |
10,493 |
2019-06-07 |
|
| 18 |
Heerwagen Paul K Iv |
Director |
10,493 |
2019-06-07 |
|
| 19 |
Weiss Andre |
Director |
6,667 |
2016-10-21 |
|
| 20 |
Gaydosik Aaron |
Director |
6,667 |
2016-10-21 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2025-12-11 |
Amron Arthur H |
Director |
Informative Buy |
10,000 |
$1.89 |
$18.9K |
| 2025-05-22 |
Smith Arthur L |
Director |
Informative Sell |
20,000 |
$2.51 |
$50.2K |
| 2025-05-20 |
Smith Arthur L |
Director |
Informative Sell |
50,000 |
$2.51 |
$125.5K |
| 2025-05-19 |
Smith Arthur L |
Director |
Informative Sell |
15,000 |
$2.49 |
$37.35K |
