WEXFORD CAPITAL LP - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 4, 2026
WEXFORD CAPITAL LP has filed 1 SEC Form 4 filing across 1 company in the last 90 days - buying. Lifetime open-market purchases: $10.47M.
Profile
WEXFORD CAPITAL LP is an investment firm that reports beneficial ownership of shares in MAMMOTH ENERGY SERVICES, INC. (TUSK) under U.S. securities law. It has submitted 1 SEC insider filing since 2026, most recently in June 2026.
| Filer type | Fund |
|---|---|
| Role | Chief Business Officer, Director, 10% Owner |
| Notability | 20/100 |
Board memberships
- MAMMOTH ENERGY SERVICES, INC.
Reported roles
- Chief Business Officer
Awards & honors
- No publicly verifiable biographical achievements available; identity ambiguity based on SEC context.
Trading Pattern
InsiderAlpha's records for WEXFORD CAPITAL LP go back to 2026: 1 primary Form 4 filing, an average of 1.0 per year. The typical open-market purchase is $10.47M (1 buy totaling $10.47M). The largest single buy on record is $10.47M of TUSK in 2026. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Career & Filing History
Every role WEXFORD CAPITAL LP has reported on a Form 4, reconstructed from the filings themselves - reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
- Chief Business Officer, Director, 10% Owner at MAMMOTH ENERGY SERVICES, INC. (TUSK) - 1 filing, 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-06-22 | TUSK | MAMMOTH ENERGY SERVICES, INC. | P - Open-market purchase | 4.02M | $2.60 | $10.47M |
| 2026-06-22 | TUSK | MAMMOTH ENERGY SERVICES, INC. | J - Other acquisition / disposition | 6.35M | $0.00 | |
| 2026-06-22 | TUSK | MAMMOTH ENERGY SERVICES, INC. | J - Other acquisition / disposition | 1.07M | $0.00 |
Companies - Last 90 Days
- MAMMOTH ENERGY SERVICES, INC. (TUSK) - 1 filing, last 2026-06-22
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades at the companies WEXFORD CAPITAL LP has recently filed at. Multiple unrelated insiders buying the same stock within a short window - cluster buying - has historically been one of the strongest Form 4 signals.
- Arthur H. Amron - $32K of TUSK open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Patrick Whitesell
- Gregg Williams
- Stephen T. Wills
- WINMILL CO. INC
- Caroline Young
- Jeffrey Yu
- George Raymond Zage III
- Payam Zamani
Frequently Asked Questions
What is WEXFORD CAPITAL LP?
WEXFORD CAPITAL LP is an investment firm that reports beneficial ownership of shares in MAMMOTH ENERGY SERVICES, INC. (TUSK) under U.S. securities law. It has submitted 1 SEC insider filing since 2026, most recently in June 2026.…
How many SEC Form 4 filings has WEXFORD CAPITAL LP submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has WEXFORD CAPITAL LP been buying or selling stock?
Recorded transactions: 1 open-market purchase ($10.47M) and 0 open-market sales across all tracked filings.
Where can I see all of WEXFORD CAPITAL LP's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
Learn More
Open the live WEXFORD CAPITAL LP profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.