WEXFORD CAPITAL LP — SEC Form 4 filings
SEC reporting owner CIK 1048462. 5 Form 4 filings on record with FilingPulse; latest filed 2026-09-16.
Transaction summary — filings shown
Covers all 5 filings on record, filed 2024-03-14 to 2026-09-16. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): 1 leg across 1 filing — 4,019,574 shares, $10,468,177 total (shares × price as filed).
- Open-market sales (code S, non-derivative): none reported.
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 8.
- Largest priced transaction: purchase of 4,019,574 shares @ $2.60 ($10,468,177) in MAMMOTH ENERGY SERVICES, INC., filed 2026-06-22.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| MAMMOTH ENERGY SERVICES, INC. (TUSK) | Chief Business Officer, Director, 10% owner | 2 | 1 leg · 4,019,574 sh · $10,468,177 | — | 3 |
| NEPHROS INC (NEPH) | 10% owner | 3 | — | — | 5 |
Form 4 filings — WEXFORD CAPITAL LP
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-16 | 4 | NEPHROS INC (NEPH) jointly with Wexford GP LLC, DAVIDSON CHARLES E, JACOBS JOSEPH | Other (J): 3,355,111 @ $0 · Other (J): 22,710 @ $3.95 | EDGAR |
| 2026-08-20 | 4 | NEPHROS INC (NEPH) jointly with Wexford GP LLC, DAVIDSON CHARLES E, JACOBS JOSEPH | Option exercise (M): 812 @ $3.60 · Option exercise (M): 3,765 (derivative) @ $0 | EDGAR |
| 2026-06-22 | 4 | MAMMOTH ENERGY SERVICES, INC. (TUSK) jointly with Wexford GP LLC, DAVIDSON CHARLES E, JACOBS JOSEPH | Other (J): 1,072,896 @ $0 · Other (J): 6,354,667 @ $0 · Purchase (P): 4,019,574 @ $2.60 | EDGAR |
| 2024-03-14 | 4 | MAMMOTH ENERGY SERVICES, INC. (TUSK) jointly with Wexford GP LLC, DAVIDSON CHARLES E, JACOBS JOSEPH | Other (J): 535,366 @ $0 | EDGAR |
| 2024-03-14 | 4 | NEPHROS INC (NEPH) jointly with Wexford GP LLC, DAVIDSON CHARLES E, JACOBS JOSEPH | Other (J): 91,463 @ $0 | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
Need this as JSON?
GET https://api.filingpulse.io/v1/insider-trades?owner_cik=1048462 returns every filing on this page — normalized, with footnotes and derivative legs — and webhooks push new filings to you in seconds. API docs →