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MAMMOTH ENERGY SERVICES, INC.
Oil & Gas Field Services, NEC · DE · CIK 1679268
MAMMOTH ENERGY SERVICES provides rental, infrastructure, proppant, accommodation, and drilling services to oil, gas, aviation, and utility industries
red 8-K · 90d
$158M
Market cap
$2.91
Last close
-1.0%
1D
-0.3%
5D
421K
Volume
Price · last 39 sessions+14.6%
May 4L $2.35 · H $3.84Jun 29
170
Total filings
Jun 26, 2026
Last filing
12/31
Fiscal year end
8-KShareholder VoteJun 26, 2026DEFA14ADEFA14AMay 15, 2026DEF 14ADEF 14AMay 15, 20268-KAuditor ChangeMay 15, 202610-Q10-QMay 11, 20268-KResults of OperationsMay 11, 202610-K10-KMar 6, 20268-KResults of OperationsMar 6, 20268-KMaterial Agreement · Acquisition / DispositionDec 4, 202510-Q10-QNov 3, 20258-KResults of OperationsOct 31, 202510-Q10-QAug 8, 20258-KResults of OperationsAug 8, 20258-KExecutive Change · Material AgreementJul 3, 20258-KExecutive ChangeJun 30, 20258-KMaterial Impairment · Material AgreementJun 20, 20258-KShareholder VoteJun 12, 20258-KExecutive ChangeJun 5, 202510-Q10-QMay 7, 20258-KResults of Operations · Reg FD DisclosureMay 7, 2025DEFA14ADEFA14AApr 28, 2025DEF 14ADEF 14AApr 28, 20258-KExecutive Change · Material AgreementApr 17, 20258-KAuditor ChangeMar 12, 202510-K10-KMar 7, 20258-KResults of Operations · Reg FD DisclosureMar 7, 20258-KExecutive ChangeFeb 13, 20258-KExecutive Change · Reg FD DisclosureNov 7, 202410-Q10-QNov 1, 20248-KResults of Operations · Reg FD DisclosureNov 1, 20248-KMaterial Agreement · New Debt / ObligationOct 21, 20248-KDebt Acceleration · Agreement TerminatedOct 3, 202410-Q10-QAug 9, 20248-KResults of Operations · Reg FD DisclosureAug 9, 20248-KDebt Acceleration · Material ImpairmentJul 23, 20248-KShareholder VoteJun 14, 202410-Q10-QMay 2, 20248-KResults of Operations · Reg FD DisclosureMay 2, 2024DEFA14ADEFA14AApr 29, 2024DEF 14ADEF 14AApr 29, 202410-K10-KMar 1, 20248-KResults of Operations · Reg FD DisclosureMar 1, 20248-KMaterial Agreement · New Debt / ObligationDec 6, 202310-Q10-QNov 9, 20238-KResults of Operations · Reg FD DisclosureNov 9, 20238-KMaterial Agreement · New Debt / ObligationOct 19, 202310-Q10-QAug 11, 20238-KResults of Operations · Reg FD DisclosureAug 11, 20238-KShareholder VoteJun 8, 202310-Q10-QMay 1, 20238-KResults of Operations · Reg FD DisclosureApr 27, 2023DEFA14ADEFA14AApr 25, 2023DEF 14ADEF 14AApr 25, 202310-K10-KFeb 24, 20238-KResults of Operations · Reg FD DisclosureFeb 23, 2023SC 13GSC 13GFeb 10, 202310-Q10-QOct 28, 20228-KResults of Operations · Reg FD DisclosureOct 27, 202210-Q10-QAug 2, 20228-KResults of Operations · Reg FD DisclosureJul 28, 20228-KShareholder VoteJun 30, 20228-KReg FD DisclosureMay 24, 202210-Q10-QMay 10, 20228-KResults of Operations · Reg FD DisclosureMay 9, 2022DEFA14ADEFA14AMay 2, 2022DEF 14ADEF 14AMay 2, 2022SC 13GMAMMOTH ENERGY SERVICES, INC.Apr 21, 202210-K10-KMar 4, 20228-KResults of Operations · Reg FD DisclosureMar 4, 202210-Q10-QNov 5, 20218-KResults of Operations · Reg FD DisclosureNov 5, 20218-KReg FD Disclosure · Company UpdateNov 3, 20218-KDebt Acceleration · Company UpdateSep 27, 202110-Q10-QAug 3, 20218-KResults of Operations · Reg FD DisclosureJul 30, 2021SC 13DSCHEDULE 13DJul 12, 20218-KCompany UpdateJun 9, 20218-KShareholder VoteJun 4, 202110-Q10-QMay 3, 20218-KResults of Operations · Reg FD DisclosureApr 29, 2021
Insider Activity
In the 90 days to Dec 11, 2025: 1 insider bought $19K.
| Date | Insider | Action | Shares | Price | Value |
|---|---|---|---|---|---|
| Dec 11, 2025 | Amron Arthur HDirector | Buy | 10,000 | $1.89 | $19K |
Open-market buys & sells (Form 4, transaction codes P/S). Source: SEC structured insider data.
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