MAMMOTH ENERGY SERVICES, INC. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| Palm James D | — | Award / Grant | 86,957 | — | — | 117,175 | Jul 2, 2020 |
| Straehla Arty | Chief Executive Officer | Award / Grant | 1,300,000 | — | — | 1,485,317 | Mar 3, 2020 |
| Layton Mark E. | CFO and Secretary | Award / Grant | 500,000 | — | — | 551,566 | Mar 3, 2020 |
| Ross Matthew | — | Sale | 2,913 | $1.44 | $4,195 | 19,815 | Nov 21, 2019 |
| Wexford Spectrum Trading LTD | — | Purchase | 16,692 | $1.33 | $22,200 | 22,045,273 | Nov 20, 2019 |
| YELLEN JONATHAN H | — | Award / Grant | 36,674 | — | — | 36,674 | Nov 18, 2019 |
| WEXFORD CAPITAL LP | — | Purchase | 35,904 | $1.36 | $48,829 | 22,028,581 | Nov 13, 2019 |
| AMRON ARTHUR H | — | Award / Grant | 10,493 | — | — | 10,493 | Jun 5, 2019 |
| McCarthy Marc T | — | Award / Grant | 10,493 | — | — | 10,493 | Jun 5, 2019 |
| Palm James D | — | Award / Grant | 10,493 | — | — | 30,218 | Jun 5, 2019 |
| SMITH ARTHUR L | — | Award / Grant | 10,493 | — | — | 22,728 | Jun 5, 2019 |
| Ross Matthew | — | Award / Grant | 10,493 | — | — | 22,728 | Jun 5, 2019 |
| Heerwagen Paul K IV | — | Award / Grant | 10,493 | — | — | 10,493 | Jun 5, 2019 |
| AMRON ARTHUR H | — | Award / Grant | 1,549 | — | — | 1,549 | Jan 25, 2019 |
| SMITH ARTHUR L | — | Sale | 6,000 | $24.85 | $149,100 | — | Dec 3, 2018 |
| Layton Mark E. | CFO and Secretary | Sale | 994 | $27.27 | $27,106 | 51,708 | Nov 9, 2018 |
| Straehla Arty | Chief Executive Officer | Sale | 25,151 | $26.45 | $665,244 | 199,007 | Nov 8, 2018 |
| GULFPORT ENERGY CORP | — | Sale | 118,974 | $38.01 | $4,522,202 | 9,829,548 | Jul 30, 2018 |
| WEXFORD CAPITAL LP | — | Sale | 266,026 | $38.01 | $10,111,648 | 21,978,893 | Jul 30, 2018 |
| GULFPORT ENERGY CORP | — | Sale | 1,235,600 | $38.01 | $46,965,156 | 9,948,522 | Jun 29, 2018 |
| WEXFORD CAPITAL LP | — | Sale | 2,764,400 | $38.01 | $105,074,844 | 22,244,919 | Jun 29, 2018 |
| Heerwagen Paul K IV | — | Award / Grant | 2,655 | — | — | 2,655 | Jun 7, 2018 |
| Palm James D | — | Award / Grant | 2,655 | — | — | 19,725 | Jun 7, 2018 |
| Ross Matthew | — | Award / Grant | 2,655 | — | — | 12,235 | Jun 7, 2018 |
| SMITH ARTHUR L | — | Award / Grant | 2,655 | — | — | 12,235 | Jun 7, 2018 |
| McCarthy Marc T | — | Award / Grant | 2,655 | — | — | 2,655 | Jun 7, 2018 |
| Layton Mark E. | CFO and Secretary | Sale | 4,373 | $26.13 | $114,266 | 52,702 | Mar 1, 2018 |
| Heerwagen Paul K IV | — | Award / Grant | 2,913 | — | — | 2,913 | Feb 2, 2018 |
| Ross Matthew | — | Award / Grant | 2,913 | — | — | 9,580 | Feb 2, 2018 |
| SMITH ARTHUR L | — | Award / Grant | 2,913 | — | — | 9,580 | Feb 2, 2018 |
| Palm James D | — | Award / Grant | 4,370 | — | — | 17,070 | Feb 2, 2018 |
| McCarthy Marc T | — | Award / Grant | 2,913 | — | — | 2,913 | Feb 2, 2018 |
| Straehla Arty | Chief Executive Officer | Sale | 7,553 | $17.81 | $134,519 | 224,158 | Nov 14, 2017 |
| Layton Mark E. | CFO and Secretary | Sale | 925 | $19.01 | $17,584 | 57,075 | Nov 14, 2017 |
| Palm James D | — | Purchase | 2,000 | $12.60 | $25,200 | 12,700 | Aug 24, 2017 |
| SMITH ARTHUR L | — | Purchase | 6,000 | $16.91 | $101,460 | 6,000 | Jun 9, 2017 |
| Wexford GP LLC | — | Award / Grant | 4,565,416 | — | — | 25,009,319 | Jun 8, 2017 |
| GULFPORT ENERGY CORP | — | Award / Grant | 2,098,137 | — | — | 11,181,467 | Jun 5, 2017 |
| Straehla Arty | Chief Executive Officer | Purchase | 460 | $21.76 | $10,010 | 460 | Feb 28, 2017 |
| Layton Mark E. | CFO and Secretary | Award / Grant | 40,000 | — | — | 58,000 | Feb 21, 2017 |
| Ross Matthew | — | Award / Grant | 6,667 | — | — | 6,667 | Nov 7, 2016 |
| Gaydosik Aaron | — | Award / Grant | 6,667 | — | — | 6,667 | Oct 19, 2016 |
| GULFPORT ENERGY CORP | — | Sale | 76,250 | $14.06 | $1,072,075 | 9,080,417 | Oct 19, 2016 |
| Layton Mark E. | CFO and Secretary | Award / Grant | 15,000 | — | — | 18,000 | Oct 19, 2016 |
| SMITH ARTHUR L | — | Award / Grant | 6,667 | — | — | 6,667 | Oct 19, 2016 |
| Straehla Arty | Chief Executive Officer | Purchase | 666 | $15.00 | $9,990 | 1,332 | Oct 19, 2016 |
| Weiss Andre | — | Award / Grant | 6,667 | — | — | 6,667 | Oct 19, 2016 |
| McCarthy Marc T | — | Award / Grant | 6,667 | — | — | 6,667 | Oct 19, 2016 |
| Wexford GP LLC | — | Sale | 171,797 | $14.06 | $2,415,466 | 20,445,923 | Oct 19, 2016 |
| Heerwagen Paul K IV | — | Award / Grant | 4,444 | — | — | 4,444 | Jan 9, 2016 |