Wexford Capital LP insider trades
Wexford Capital LP has filed 3 Form 4s with the SEC that we hold, for Nephros INC (NEPH) (10% owner) and Mammoth Energy Services, INC. (TUSK) (Director, 10% owner). Across all of them we count 2 purchases worth $97.1K and 0 sales worth $0 reported on Form 4. None of these purchases or sales is dated in the last 12 months. The largest single trade was a purchase of 35,000 shares of Mammoth Energy Services, INC. worth $74.5K, dated 2022-06-16. The first filing on our record is dated 2022-06-21 and the latest 2026-09-16.
Nephros INC (NEPH)
No purchase or sale of common stock reported here; these filings cover grants, option exercises or other codes.
Mammoth Energy Services, INC. (TUSK)
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2022-06-16 | P, purchase reported on Form 4 | 35,000 | $74.5K | 2022-06-21 |
| 2022-06-17 | P, purchase reported on Form 4 | 10,382 | $22.5K | 2022-06-21 |
Counted from the Form 4 filings this reporting owner (SEC CIK 1048462) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.
Source: U.S. Securities and Exchange Commission (EDGAR) and other official
government data · Updated 2026-10-12 ·
For informational purposes only, not investment advice.
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