Mammoth Energy Services, Inc. SEC filings TUSK
Mammoth Energy Services, Inc. has 369 filings in SEC EDGAR's recent list, going back to Jul 18, 2016. Its latest annual report, Form ARS, was filed on May 15, 2026 for the period ended May 15, 2026. The latest quarterly report (Form 10-Q) was filed on Oct 30, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Oct 30, 2026 (material agreement, new debt, regulation fd disclosure). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 4 | Insider transaction | Sep 17, 2026 | Sep 16, 2026 |
| 4 | Insider transaction | Jul 1, 2026 | Jun 26, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jun 22, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jun 22, 2026 | — |
| 4 | Insider transaction | Jun 22, 2026 | Jun 17, 2026 |
| 4 | Insider transaction | Jun 22, 2026 | Jun 17, 2026 |
| 4 | Insider transaction | Jun 22, 2026 | Jun 17, 2026 |
| 4 | Insider transaction | Jun 22, 2026 | Jun 17, 2026 |
| 4 | Insider transaction | Jun 15, 2026 | Jun 11, 2026 |
| 4 | Insider transaction | May 28, 2026 | May 26, 2026 |
| 4 | Insider transaction | Dec 15, 2025 | Dec 11, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2025 | — |
| 144 | Notice of proposed sale | Aug 12, 2025 | — |
| 4 | Insider transaction | May 27, 2025 | May 22, 2025 |
| 4 | Insider transaction | May 21, 2025 | May 19, 2025 |
| 144 | Notice of proposed sale | May 12, 2025 | — |
| 4 | Insider transaction | Dec 16, 2024 | Dec 12, 2024 |
| 4 | Insider transaction | Nov 26, 2024 | Nov 22, 2024 |
| 4 | Insider transaction | Nov 22, 2024 | Nov 20, 2024 |
| 4 | Insider transaction | Nov 15, 2024 | Nov 13, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 13, 2024 | — |
| 4 | Insider transaction | Nov 12, 2024 | Nov 7, 2024 |
| 144 | Notice of proposed sale | Nov 7, 2024 | — |
| 4 | Insider transaction | Jun 14, 2024 | Jun 12, 2024 |
| 4 | Insider transaction | Jun 14, 2024 | Jun 12, 2024 |
| 4 | Insider transaction | Jun 14, 2024 | Jun 12, 2024 |
| 4 | Insider transaction | Jun 14, 2024 | Jun 12, 2024 |
| 4 | Insider transaction | Jun 14, 2024 | Jun 12, 2024 |
| 4 | Insider transaction | May 30, 2024 | May 28, 2024 |
| 4 | Insider transaction | Mar 14, 2024 | Mar 12, 2024 |
| 4 | Insider transaction | Mar 14, 2024 | Mar 12, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 7, 2024 | — |
| 4 | Insider transaction | Dec 19, 2023 | Dec 18, 2023 |
| 4 | Insider transaction | Dec 15, 2023 | Dec 13, 2023 |
| 144 | Notice of proposed sale | Dec 13, 2023 | — |
| 4 | Insider transaction | Jun 8, 2023 | Jun 7, 2023 |
| 4 | Insider transaction | Jun 8, 2023 | Jun 7, 2023 |
| 4 | Insider transaction | Jun 8, 2023 | Jun 7, 2023 |
| 4 | Insider transaction | Jun 8, 2023 | Jun 7, 2023 |
| 4 | Insider transaction | Jun 8, 2023 | Jun 7, 2023 |
| 4 | Insider transaction | Mar 7, 2023 | Mar 3, 2023 |
| 4 | Insider transaction | Mar 7, 2023 | Mar 3, 2023 |
| SC 13G | Ownership over 5% (passive) | Feb 10, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 1, 2023 | — |
| 4 | Insider transaction | Nov 14, 2022 | Nov 11, 2022 |
| 4 | Insider transaction | Jun 30, 2022 | Jun 29, 2022 |
| 4 | Insider transaction | Jun 30, 2022 | Jun 29, 2022 |
| 4 | Insider transaction | Jun 30, 2022 | Jun 29, 2022 |
| 4 | Insider transaction | Jun 30, 2022 | Jun 29, 2022 |
| 4 | Insider transaction | Jun 30, 2022 | Jun 29, 2022 |
| 4 | Insider transaction | Jun 21, 2022 | Jun 16, 2022 |
| 4 | Insider transaction | Jun 15, 2022 | Jun 13, 2022 |
| 4 | Insider transaction | Jun 10, 2022 | Jun 8, 2022 |
| SC 13G | Ownership over 5% (passive) | Apr 21, 2022 | — |
| 4 | Insider transaction | Mar 11, 2022 | Mar 10, 2022 |
| 5 | Annual insider ownership | Feb 14, 2022 | Dec 31, 2021 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2022 | — |
| 4 | Insider transaction | Dec 14, 2021 | Dec 13, 2021 |
| 3 | Initial insider ownership | Jul 12, 2021 | Jun 30, 2021 |
| SC 13D | Ownership over 5% (active) | Jul 12, 2021 | — |
| 4 | Insider transaction | Jun 4, 2021 | Jun 2, 2021 |
| 4 | Insider transaction | Jun 4, 2021 | Jun 2, 2021 |
| 4 | Insider transaction | Jun 4, 2021 | Jun 2, 2021 |
| 4 | Insider transaction | Jun 4, 2021 | Jun 2, 2021 |
| 4 | Insider transaction | Jun 4, 2021 | Jun 2, 2021 |
| 4 | Insider transaction | Mar 11, 2021 | Mar 11, 2021 |
| 4 | Insider transaction | Mar 11, 2021 | Mar 9, 2021 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 5, 2021 | — |
| 4 | Insider transaction | Nov 13, 2020 | Nov 10, 2020 |
| 4 | Insider transaction | Sep 8, 2020 | Sep 4, 2020 |
| 4 | Insider transaction | Aug 19, 2020 | Aug 17, 2020 |
| 3 | Initial insider ownership | Aug 19, 2020 | Aug 17, 2020 |
| 4 | Insider transaction | Jul 7, 2020 | Jul 2, 2020 |
| 4 | Insider transaction | Jul 7, 2020 | Jul 2, 2020 |
| 3 | Initial insider ownership | Jul 7, 2020 | Jul 2, 2020 |
| 4 | Insider transaction | Jul 7, 2020 | Jul 2, 2020 |
| 4 | Insider transaction | Jul 7, 2020 | Jul 2, 2020 |
| 4 | Insider transaction | Mar 4, 2020 | Mar 3, 2020 |
| 4 | Insider transaction | Mar 4, 2020 | Mar 3, 2020 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2020 | — |
| 4 | Insider transaction | Nov 22, 2019 | Nov 20, 2019 |
| 4 | Insider transaction | Nov 22, 2019 | Nov 21, 2019 |
| 4 | Insider transaction | Nov 20, 2019 | Nov 18, 2019 |
| 3 | Initial insider ownership | Nov 20, 2019 | Nov 18, 2019 |
| 4 | Insider transaction | Nov 15, 2019 | Nov 13, 2019 |
| 4 | Insider transaction | Jun 7, 2019 | Jun 5, 2019 |
| 4 | Insider transaction | Jun 7, 2019 | Jun 5, 2019 |
| 4 | Insider transaction | Jun 7, 2019 | Jun 5, 2019 |
| 4 | Insider transaction | Jun 7, 2019 | Jun 5, 2019 |
| 4 | Insider transaction | Jun 7, 2019 | Jun 5, 2019 |
| 4 | Insider transaction | Jun 7, 2019 | Jun 5, 2019 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 11, 2019 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 11, 2019 | — |
| 4 | Insider transaction | Jan 29, 2019 | Jan 25, 2019 |
| 3 | Initial insider ownership | Jan 29, 2019 | Jan 25, 2019 |
| 4 | Insider transaction | Dec 6, 2018 | Dec 3, 2018 |
| 4 | Insider transaction | Nov 13, 2018 | Nov 8, 2018 |
| 4 | Insider transaction | Nov 13, 2018 | Nov 8, 2018 |
| 3 | Initial insider ownership | Aug 9, 2018 | Jul 30, 2018 |
| 4 | Insider transaction | Aug 1, 2018 | Jul 30, 2018 |
| 4 | Insider transaction | Aug 1, 2018 | Jul 30, 2018 |
| SC 13D/A | Amended ownership over 5% (active) | Jul 9, 2018 | — |
| 4 | Insider transaction | Jul 3, 2018 | Jun 29, 2018 |
| 4 | Insider transaction | Jul 3, 2018 | Jun 29, 2018 |
| 4 | Insider transaction | Jun 11, 2018 | Jun 7, 2018 |
| 4 | Insider transaction | Jun 11, 2018 | Jun 7, 2018 |
| 4 | Insider transaction | Jun 11, 2018 | Jun 7, 2018 |
| 4 | Insider transaction | Jun 11, 2018 | Jun 7, 2018 |
| 4 | Insider transaction | Jun 11, 2018 | Jun 7, 2018 |
| 4 | Insider transaction | Mar 7, 2018 | Mar 1, 2018 |
| 5 | Annual insider ownership | Feb 14, 2018 | Jun 5, 2017 |
| SC 13D | Ownership over 5% (active) | Feb 14, 2018 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2018 | — |
| SC 13G | Ownership over 5% (passive) | Feb 13, 2018 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2018 | — |
| 4 | Insider transaction | Feb 6, 2018 | Feb 2, 2018 |
| 4 | Insider transaction | Feb 6, 2018 | Feb 2, 2018 |
| 4 | Insider transaction | Feb 6, 2018 | Feb 2, 2018 |
| 4 | Insider transaction | Feb 6, 2018 | Feb 2, 2018 |
| 4 | Insider transaction | Feb 6, 2018 | Feb 2, 2018 |
| 4 | Insider transaction | Nov 16, 2017 | Nov 14, 2017 |
| 4 | Insider transaction | Nov 16, 2017 | Nov 14, 2017 |
| 4 | Insider transaction | Aug 28, 2017 | Aug 24, 2017 |
| 3 | Initial insider ownership | Jul 6, 2017 | Jun 26, 2017 |
| 4 | Insider transaction | Jun 22, 2017 | Jun 8, 2017 |
| 4 | Insider transaction | Jun 13, 2017 | Jun 9, 2017 |
| 4 | Insider transaction | Mar 2, 2017 | Feb 28, 2017 |
| 4 | Insider transaction | Feb 23, 2017 | Feb 21, 2017 |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2017 | — |
| SC 13G | Ownership over 5% (passive) | Feb 13, 2017 | — |
| SC 13G | Ownership over 5% (passive) | Feb 8, 2017 | — |
| 4 | Insider transaction | Jan 10, 2017 | Jan 9, 2017 |
| 3 | Initial insider ownership | Jan 10, 2017 | Jan 9, 2017 |
| 4 | Insider transaction | Nov 9, 2016 | Nov 7, 2016 |
| 3 | Initial insider ownership | Nov 9, 2016 | Nov 7, 2016 |
| 4 | Insider transaction | Oct 21, 2016 | Oct 19, 2016 |
| 4 | Insider transaction | Oct 21, 2016 | Oct 19, 2016 |
| 4 | Insider transaction | Oct 21, 2016 | Oct 19, 2016 |
| 4 | Insider transaction | Oct 21, 2016 | Oct 19, 2016 |
| 4 | Insider transaction | Oct 21, 2016 | Oct 19, 2016 |
| 4 | Insider transaction | Oct 21, 2016 | Oct 19, 2016 |
| 4 | Insider transaction | Oct 21, 2016 | Oct 19, 2016 |
| 4 | Insider transaction | Oct 21, 2016 | Oct 19, 2016 |
| 3 | Initial insider ownership | Oct 13, 2016 | Oct 13, 2016 |
| 3 | Initial insider ownership | Oct 13, 2016 | Oct 13, 2016 |
| 3 | Initial insider ownership | Oct 13, 2016 | Oct 13, 2016 |
| 3 | Initial insider ownership | Oct 13, 2016 | Oct 13, 2016 |
| 3 | Initial insider ownership | Oct 13, 2016 | Oct 13, 2016 |
| 3 | Initial insider ownership | Oct 13, 2016 | Oct 13, 2016 |
| 3 | Initial insider ownership | Oct 13, 2016 | Oct 13, 2016 |
| 3 | Initial insider ownership | Oct 13, 2016 | Oct 13, 2016 |
Showing 154 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Oil & Gas Field Services, NEC (SIC 1389)
- Listed as
- TUSK (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Oklahoma City, OK
- SEC filer status
- Accelerated filer, Smaller reporting company
- SEC CIK
- 1679268
Other Oil & Gas Field Services, NEC companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.