# Mammoth Energy Services, Inc.: insider transactions

TUSK · Nasdaq · CIK 1679268 · [Energy](/sectors/energy.md) · fiscal year ends Dec 31

Pages: [Overview](/companies/tusk.md) · [Financials](/companies/tusk/financials.md) · [Filings](/companies/tusk/filings.md) · [Insiders](/companies/tusk/insiders.md)

## All transactions: 3

Non-derivative transactions reported on Forms 4, newest first. Codes P (purchase) and S (sale) are open-market trades. Reported price is as stated on the form, not a market price. Filter with ?type= `open-market`, `purchase`, `sale`.

| Date | Insider | Role | Transaction | Shares | Reported price | Value | Filing |
| --- | --- | --- | --- | ---: | ---: | ---: | --- |
| 2018-07-30 | [Gulfport Energy Corp](/insiders/874499.md) | Director, 10% owner | Sale (S) | 118,974 | $38.01 | $4.5m | [Form 4](/filings/0000899243-18-021021.md) |
| 2018-06-29 | [Gulfport Energy Corp](/insiders/874499.md) | Director, 10% owner | Sale (S) | 1,235,600 | $38.01 | $47.0m | [Form 4](/filings/0000899243-18-019188.md) |
| 2016-10-19 | [Gulfport Energy Corp](/insiders/874499.md) | Director, 10% owner | Sale (S) | 76,250 | $14.0625 | $1.1m | [Form 4](/filings/0000899243-16-032195.md) |

Source: SEC EDGAR, Forms 4. Last ingested by Listed: Oct 30, 2026, 17:00 ET. No prices; not investment advice.