MAMMOTH ENERGY SERVICES, INC. (TUSK) Insider Trading & SEC Filings
Last SEC filing
MAMMOTH ENERGY SERVICES, INC. (TUSK) has filed 7 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-01. Insiders disclosed 5 open-market purchases totaling $10.50M. 3 Form 8-K material event filings were reported by TUSK in the last 90 days. InsiderAlpha tracks every TUSK SEC filing - Form 4, Form 144, and 8-K - in real time, including Rule 10b5-1 plan detection.
About MAMMOTH ENERGY SERVICES, INC. (TUSK)
MAMMOTH ENERGY SERVICES, INC. trades under the ticker TUSK. InsiderAlpha tracks 14 primary SEC Form 4 filings from 7 reporting insiders for TUSK since 2024, sourced directly from SEC EDGAR.
| Sector | Energy insider trading |
|---|---|
| SIC classification | Oil & Gas Field Services, NEC (SIC 1389) |
| SEC CIK | 0001679268 |
90-Day SEC Filing Activity
| Insider purchases (90d) | 5 ($10.50M) |
|---|---|
| Form 4 filings (90d) | 7 |
| Form 8-K filings (90d) | 3 |
| Latest Form 4 filing | 2026-07-01 |
Recent TUSK Insider Transactions (Form 4)
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Phillip Lancaster | Director | J - Other acquisition / disposition | 68.2K | $0.00 | - | SEC | |
| Paul M. Jacobi | Chief Business Officer | J - Other acquisition / disposition | 3.2K | $0.00 | - | SEC | |
| WEXFORD CAPITAL LP | Chief Business Officer | P - Open-market purchase | 4.02M | $2.60 | $10.47M | SEC | |
| WEXFORD CAPITAL LP | Chief Business Officer | J - Other acquisition / disposition | 6.35M | $0.00 | - | SEC | |
| WEXFORD CAPITAL LP | Chief Business Officer | J - Other acquisition / disposition | 1.07M | $0.00 | - | SEC | |
| Arthur H. Amron | Director | J - Other acquisition / disposition | 10.3K | $0.00 | - | SEC | |
| Arthur H. Amron | Director | J - Other acquisition / disposition | 19.1K | $0.00 | - | SEC | |
| Charles E. Davidson | 10% Owner | J - Other acquisition / disposition | 4.07M | $0.00 | - | SEC | |
| Charles E. Davidson | 10% Owner | J - Other acquisition / disposition | 2.40M | $0.00 | - | SEC | |
| Arthur H. Amron | Director | P - Open-market purchase | 2.0K | $3.28 | $7K | SEC | |
| Arthur H. Amron | Director | P - Open-market purchase | 2.5K | $3.22 | $8K | SEC | |
| Arthur H. Amron | Director | P - Open-market purchase | 3.0K | $3.25 | $10K | SEC | |
| Arthur H. Amron | Director | P - Open-market purchase | 2.5K | $3.24 | $8K | SEC | |
| Arthur L. Smith | Director | S - Open-market sale | 20.0K | $2.51 | $50K | SEC | |
| Arthur L. Smith | Director | S - Open-market sale | 50.0K | $2.51 | $125K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for MAMMOTH ENERGY SERVICES, INC. (TUSK). Updated in real time as new filings are submitted to the SEC.
Most-Active TUSK Insiders - Last 90 Days
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Arthur H. Amron | 6 | $32K |
| WEXFORD CAPITAL LP | 3 | $10.47M |
| Charles E. Davidson | 2 | - |
| Paul M. Jacobi | 1 | - |
| Phillip Lancaster | 1 | - |
Recent TUSK Form 8-K Material Events
- - Item 5.07 [SEC]
- - Item 4.01, 9.01 [SEC]
- - Item 2.02, 9.01 [SEC]
- - Item 2.02, 9.01 · Earnings · neutral [SEC]
Mammoth Energy Services announced its operational and financial results for Q4 2025 and full year 2025 on March 6, 2026. The filing provides standard financial results reporting without explicit beat/miss language or forward guidance changes.
Recent Insider Filings
- - Phillip Lancaster (Director)
- - Paul M. Jacobi (Chief Business Officer)
- - Arthur H. Amron (Director)
- - WEXFORD CAPITAL LP (Chief Business Officer)
- - Charles E. Davidson (10% Owner)
Form 4 Transaction Code Reference
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in TUSK insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
TUSK Insider Trading - FAQ
- What is the latest insider trade for TUSK?
- MAMMOTH ENERGY SERVICES, INC. (TUSK) had 7 insider filings in the last 90 days, with the most recent on 2026-07-01. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
- How many insiders are buying TUSK stock?
- 5 insider purchases of TUSK were filed in the last 90 days, totaling $10.50M.
- How many insiders are selling TUSK stock?
- 0 insider sales of TUSK were filed in the last 90 days.
- Where can I see TUSK SEC filings (Form 4, 10-K, 10-Q, 8-K)?
- This page tracks TUSK Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
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Learn More
- What is SEC Form 4?
- How to read insider buying signals
- Rule 10b5-1 trading plans explained
- The cluster buying signal
Open the live TUSK dashboard on InsiderAlpha for real-time alerts, charting, and full historical filing search.