Mark Lawrence Plaumann - 16 Sep 2026 Form 4 Insider Report for MAMMOTH ENERGY SERVICES, INC. (TUSK)

Reporting relationship: Director
Issuer ticker: TUSK
Reported as of: 16 Sep 2026
Net transaction value: +$15,000
SEC form: 4
Accepted by SEC: 17 Sep 2026, 16:50:18 UTC
Prior SEC filing: 24 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/ Mark Plaumann

Key filing fact

Mark Lawrence Plaumann filed Form 4 for MAMMOTH ENERGY SERVICES, INC. (TUSK) on 17 Sep 2026.

Key facts

This page summarizes Mark Lawrence Plaumann's Form 4 filing for MAMMOTH ENERGY SERVICES, INC. (TUSK).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 17 Sep 2026, 16:50.

Change

Previous filing in this sequence was filed on 24 Aug 2026.
Current net transaction value: +$15,000.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001290795 Primary reporting owner

Plaumann Mark Lawrence

Relationship: Director
Address: 14201 CALIBER DRIVE, SUITE 300, OKLAHOMA CITY
Signature: /s/ Mark Plaumann
Signature date: 17 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

TUSK transaction

Common Stock

Purchase

Transaction value: $15,000
Shares: +5,000
Change %
Price: $3.00
Shares after: 5,000
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

The price reported in Column 4 is a weighted average purchase price. These shares were purchased in multiple transactions at prices within a range. The reporting person undertakes to provide to Mammoth Energy Services, Inc., any security holder of Mammoth Energy Services, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price.

Footnote F2

Of the shares reported herein, 2,100 shares are held in a Roth IRA and 2,900 shares are held in a traditional IRA, each for the benefit of the Reporting Person.