The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
| Date | Insider | Role | Action | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jun 26, 2026 | Lancaster Phillip | Director | Other(J) | 68K | — | $0 |
| Jun 17, 2026 | Davidson Charles E | 10% Owner | Other(J) | 2.4M | — | $0 |
| Jun 17, 2026 | Davidson Charles E | 10% Owner | Other(J) | 4.1M | — | $0 |
| Jun 17, 2026 | Wexford Capital LP | Chief Business Officer, Director, 10% Owner | Other(J) | 1.1M | — | $0 |
| Jun 17, 2026 | Wexford Capital LP | Chief Business Officer, Director, 10% Owner | Other(J) | 6.4M | — | $0 |
| Jun 17, 2026 | Wexford Capital LP | Chief Business Officer, Director, 10% Owner | Buy(P) | 4.0M | $2.60 | $10.5M |
| Jun 17, 2026 | Amron Arthur H | Director | Other(J) | 19K | — | $0 |
| Jun 17, 2026 | Amron Arthur H | Director | Other(J) | 10K | — | $0 |
| Jun 17, 2026 | Jacobi Paul M. | Chief Business Officer, Director | Other(J) | 3K | — | $0 |
| Jun 12, 2026 | Amron Arthur H | Director | Buy(P) | 2K | $3.28 | $7K |
| Jun 11, 2026 | Amron Arthur H | Director | Buy(P) | 3K | $3.22 | $8K |
| May 28, 2026 | Amron Arthur H | Director | Buy(P) | 3K | $3.25 | $10K |
| May 26, 2026 | Amron Arthur H | Director | Buy(P) | 3K | $3.24 | $8K |
| Dec 11, 2025 | Amron Arthur H | Director | Buy(P) | 10K | $1.89 | $19K |
| May 22, 2025 | Smith Arthur L | Director | Sell(S) | 20K | $2.51 | $50K |
| May 20, 2025 | Smith Arthur L | Director | Sell(S) | 50K | $2.51 | $126K |
| May 19, 2025 | Smith Arthur L | Director | Sell(S) | 15K | $2.49 | $37K |
| Dec 12, 2024 | Amron Arthur H | Director | Buy(P) | 1K | $2.97 | $3K |
| Nov 25, 2024 | Booker Corey J. | Director | Sell(S) | 15K | $3.47 | $52K |
| Nov 22, 2024 | Booker Corey J. | Director | Sell(S) | 10K | $3.43 | $34K |
| Nov 21, 2024 | Booker Corey J. | Director | Sell(S) | 7K | $3.25 | $22K |
| Nov 20, 2024 | Booker Corey J. | Director | Sell(S) | 5K | $3.21 | $16K |
| Nov 14, 2024 | Booker Corey J. | Director | Sell(S) | 4K | $3.50 | $13K |
| Nov 13, 2024 | Booker Corey J. | Director | Sell(S) | 7K | $3.68 | $26K |
| Nov 11, 2024 | Booker Corey J. | Director | Sell(S) | 3K | $3.61 | $13K |
| Nov 8, 2024 | Booker Corey J. | Director | Sell(S) | 24 | $3.76 | $90 |
| Nov 7, 2024 | Booker Corey J. | Director | Sell(S) | 165 | $3.90 | $644 |
| Jun 12, 2024 | Amron Arthur H | Director | Grant(A) | 28K | — | $0 |
| Jun 12, 2024 | Jacobi Paul M. | Director | Grant(A) | 28K | — | $0 |
| Jun 12, 2024 | Smith Arthur L | Director | Grant(A) | 28K | — | $0 |
| Jun 12, 2024 | Palm James D | Director | Grant(A) | 28K | — | $0 |
| Jun 12, 2024 | Booker Corey J. | Director | Grant(A) | 28K | — | $0 |
| May 30, 2024 | Amron Arthur H | Director | Buy(P) | 3K | $3.65 | $11K |
| May 28, 2024 | Amron Arthur H | Director | Buy(P) | 2K | $3.57 | $7K |
| Mar 12, 2024 | Davidson Charles E | Director, 10% Owner | Other(J) | 535K | — | $0 |
| Mar 12, 2024 | Amron Arthur H | Director | Buy(P) | 3K | $3.72 | $11K |
| Dec 19, 2023 | Straehla Arty | Chief Executive Officer, Director | Sell(S) | 40K | $4.35 | $174K |
| Dec 18, 2023 | Straehla Arty | Chief Executive Officer, Director | Sell(S) | 30K | $4.38 | $131K |
| Dec 15, 2023 | Straehla Arty | Chief Executive Officer, Director | Sell(S) | 40K | $4.36 | $174K |
| Dec 14, 2023 | Straehla Arty | Chief Executive Officer, Director | Sell(S) | 55K | $4.44 | $244K |
| Dec 13, 2023 | Straehla Arty | Chief Executive Officer, Director | Sell(S) | 25K | $4.39 | $110K |
| Jun 7, 2023 | Smith Arthur L | Director | Grant(A) | 24K | — | $0 |
| Jun 7, 2023 | Palm James D | Director | Grant(A) | 24K | — | $0 |
| Jun 7, 2023 | Booker Corey J. | Director | Grant(A) | 24K | — | $0 |
| Jun 7, 2023 | Jacobi Paul M. | Director | Grant(A) | 24K | — | $0 |
| Jun 7, 2023 | Amron Arthur H | Director | Grant(A) | 24K | — | $0 |
| Mar 3, 2023 | Layton Mark E. | CFO and Secretary | Tax withholding(F) | 36K | $5.55 | $202K |
| Mar 3, 2023 | Straehla Arty | Chief Executive Officer, Director | Tax withholding(F) | 129K | $5.55 | $717K |
| Nov 11, 2022 | Smith Arthur L | Director | Sell(S) | 20K | $7.07 | $141K |
| Jun 29, 2022 | Amron Arthur H | Director | Grant(A) | 46K | — | $0 |
| Jun 29, 2022 | Booker Corey J. | Director | Grant(A) | 46K | — | $0 |
| Jun 29, 2022 | Jacobi Paul M. | Director | Grant(A) | 46K | — | $0 |
| Jun 29, 2022 | Palm James D | Director | Grant(A) | 46K | — | $0 |
| Jun 29, 2022 | Smith Arthur L | Director | Grant(A) | 46K | — | $0 |
| Jun 17, 2022 | Wexford Capital LP | Director, 10% Owner | Buy(P) | 10K | $2.17 | $23K |
| Jun 16, 2022 | Wexford Capital LP | Director, 10% Owner | Buy(P) | 35K | $2.13 | $75K |
| Jun 15, 2022 | Jacobs Joseph | Director, 10% Owner | Buy(P) | 5K | $2.23 | $11K |
| Jun 14, 2022 | Jacobs Joseph | Director, 10% Owner | Buy(P) | 21K | $2.28 | $47K |
| Jun 13, 2022 | Jacobs Joseph | Director, 10% Owner | Buy(P) | 25K | $2.35 | $59K |
| Jun 10, 2022 | Wexford GP LLC | Director, 10% Owner | Buy(P) | 55K | $2.46 | $135K |
| Jun 9, 2022 | Wexford GP LLC | Director, 10% Owner | Buy(P) | 27K | $2.48 | $68K |
| Jun 8, 2022 | Wexford GP LLC | Director, 10% Owner | Buy(P) | 16K | $2.50 | $39K |
| Mar 10, 2022 | Layton Mark E. | CFO and Secretary | Sell(S) | 40K | $2.04 | $82K |
| Dec 13, 2021 | Smith Arthur L | Director | Buy(P) | 25K | $2.00 | $50K |
| Jun 2, 2021 | Amron Arthur H | Director | Grant(A) | 26K | — | $0 |
| Jun 2, 2021 | Palm James D | Director | Grant(A) | 26K | — | $0 |
| Jun 2, 2021 | Jacobi Paul M. | Director | Grant(A) | 26K | — | $0 |
| Jun 2, 2021 | Booker Corey J. | Director | Grant(A) | 26K | — | $0 |
| Jun 2, 2021 | Smith Arthur L | Director | Grant(A) | 26K | — | $0 |
| Mar 11, 2021 | Layton Mark E. | CFO and Secretary | Sell(S) | 56K | $5.22 | $291K |
| Mar 10, 2021 | Straehla Arty | Chief Executive Officer, Director | Sell(S) | 102K | $5.29 | $542K |
| Mar 9, 2021 | Straehla Arty | Chief Executive Officer, Director | Sell(S) | 47K | $5.47 | $255K |
| Nov 10, 2020 | Straehla Arty | Chief Executive Officer, Director | Sell(S) | 5K | $1.78 | $9K |
| Sep 4, 2020 | Smith Arthur L | Director | Buy(P) | 20K | $1.29 | $26K |
| Aug 17, 2020 | Booker Corey J. | Director | Grant(A) | 54K | — | $0 |
| Jul 2, 2020 | Amron Arthur H | Director | Grant(A) | 87K | — | $0 |
| Jul 2, 2020 | Jacobi Paul M. | Director | Grant(A) | 87K | — | $0 |
| Jul 2, 2020 | Palm James D | Director | Grant(A) | 87K | — | $0 |
| Jul 2, 2020 | Smith Arthur L | Director | Grant(A) | 87K | — | $0 |
| Mar 3, 2020 | Layton Mark E. | CFO and Secretary | Grant(A) | 500K | — | $0 |
| Mar 3, 2020 | Straehla Arty | Chief Executive Officer, Director | Grant(A) | 1.3M | — | $0 |
| Nov 21, 2019 | Ross Matthew | Director | Sell(S) | 3K | $1.44 | $4K |
| Nov 20, 2019 | Wexford Spectrum Trading LTD | Director, 10% Owner | Buy(P) | 17K | $1.33 | $22K |
| Nov 18, 2019 | Yellen Jonathan H | Director | Grant(A) | 37K | — | $0 |
| Nov 13, 2019 | Wexford Capital LP | Director, 10% Owner | Buy(P) | 36K | $1.36 | $49K |
| Jun 5, 2019 | McCarthy Marc T | Director | Grant(A) | 10K | — | $0 |
| Jun 5, 2019 | Amron Arthur H | Director | Grant(A) | 10K | — | $0 |
| Jun 5, 2019 | Heerwagen Paul K IV | Director | Grant(A) | 10K | — | $0 |
| Jun 5, 2019 | Ross Matthew | Director | Grant(A) | 10K | — | $0 |
| Jun 5, 2019 | Smith Arthur L | Director | Grant(A) | 10K | — | $0 |
| Jun 5, 2019 | Palm James D | Director | Grant(A) | 10K | — | $0 |
| Jan 25, 2019 | Amron Arthur H | Director | Grant(A) | 2K | — | $0 |
| Dec 3, 2018 | Smith Arthur L | Director | Sell(S) | 6K | $24.85 | $149K |
| Nov 12, 2018 | Straehla Arty | Chief Executive Officer, Director | Sell(S) | 2K | $26.20 | $58K |
| Nov 9, 2018 | Layton Mark E. | CFO and Secretary | Sell(S) | 142 | $26.12 | $4K |
| Nov 8, 2018 | Straehla Arty | Chief Executive Officer, Director | Sell(S) | 11K | $27.29 | $313K |
| Nov 8, 2018 | Straehla Arty | Chief Executive Officer, Director | Sell(S) | 25K | $26.45 | $665K |
| Nov 8, 2018 | Layton Mark E. | CFO and Secretary | Sell(S) | 994 | $27.27 | $27K |
| Jul 30, 2018 | Gulfport Energy Corp | Director, 10% Owner | Sell(S) | 119K | $38.01 | $4.5M |
| Jul 30, 2018 | Wexford Capital LP | Director, 10% Owner | Sell(S) | 266K | $38.01 | $10.1M |
Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.
Issuer: Mammoth Energy Services, Inc., SEC CIK 0001679268. The symbol on a Form 4 is typed by the filer, so this page follows the issuer with the newest filing under TUSK and shows every filing by that issuer.
Coverage: Form 4 filings indexed 2006-01-02 → 2026-09-14. Earlier history is backfilling; this window widens as it deepens.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).
Connected pages for TUSK