Company facts
- Industry
- Oil & Gas Field Services, NEC
- Headquarters
- Oklahoma City, Oklahoma
- Most recent report
- 10-Q, filed Aug 7, 2026
- Incorporated
- Delaware
- Filings on record
- 365 filings
- On EDGAR
- CIK 1679268
- Fiscal year ends
- December
- Filer status
- Accelerated filer Smaller reporting company
Financials 8 of 40
News 8 of 100
Prospectuses and Registrations 8 of 12
- S-3 Shelf registration statement Jun 13, 2024
- S-8 Registration statement for an employee plan Jun 12, 2024
- S-3 Shelf registration statement Jun 21, 2021
- 424B5 Prospectus supplement for an offering Jun 28, 2018
- 424B5 Prospectus supplement for an offering Jun 26, 2018
- S-3/A Shelf registration statement, amended Jun 6, 2018
- S-3 Shelf registration statement Nov 1, 2017
- S-8 Registration statement for an employee plan Apr 18, 2017
Proxies 8 of 20
- DEFA14A Extra proxy material May 15, 2026
- DEF 14A Proxy statement for a shareholder vote May 15, 2026
- DEFA14A Extra proxy material Apr 28, 2025
- DEF 14A Proxy statement for a shareholder vote Apr 28, 2025
- DEFA14A Extra proxy material Apr 29, 2024
- DEF 14A Proxy statement for a shareholder vote Apr 29, 2024
- DEFA14A Extra proxy material Apr 25, 2023
- DEF 14A Proxy statement for a shareholder vote Apr 25, 2023
Ownership 8 of 153
- 4 Insider reported a trade Jul 1, 2026
- SCHEDULE 13G Large holder reported a passive stake Jun 22, 2026
- SCHEDULE 13G/A Large holder reported a passive stake, amended Jun 22, 2026
- 4 Insider reported a trade Jun 22, 2026
- 4 Insider reported a trade Jun 22, 2026
- 4 Insider reported a trade Jun 22, 2026
- 4 Insider reported a trade Jun 22, 2026
- 4 Insider reported a trade Jun 15, 2026
Other 8 of 40
- ARS Annual report sent to shareholders May 15, 2026
- ARS Annual report sent to shareholders Apr 28, 2025
- EFFECT Notice that a registration became effective Jun 26, 2024
- CORRESP Reply to SEC staff Jun 24, 2024
- UPLOAD Comment letter from SEC staff Jun 21, 2024
- ARS Annual report sent to shareholders Apr 29, 2024
- ARS Annual report sent to shareholders Apr 25, 2023
- EFFECT Notice that a registration became effective Jul 12, 2021
Everything here comes from Mammoth Energy Services, Inc.'s own filings on SEC EDGAR. The filing list is rechecked every hour.