Amron Arthur H — SEC Form 4 filings
SEC reporting owner CIK 1179697. 17 Form 4 filings on record with FilingPulse; latest filed 2026-09-16.
Transaction summary — filings shown
Covers all 17 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): 12 legs across 8 filings — 41,000 shares, $111,886 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, …): 14.
- Largest priced transaction: purchase of 10,000 shares @ $1.89 ($18,900) in MAMMOTH ENERGY SERVICES, INC., filed 2025-12-15.
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) | Director | 8 | 9 legs · 29,000 sh · $83,580 | — | 3 |
| NEPHROS INC (NEPH) | Director | 9 | 3 legs · 12,000 sh · $28,306 | — | 11 |
Form 4 filings — Amron Arthur H
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-16 | 4 | NEPHROS INC (NEPH) jointly with Amron Holdings LLC | Other (J): 17,749 @ $0 · Other (J): 2,836 @ $0 · Other (J): 22,710 @ $3.95 | EDGAR |
| 2026-08-14 | 4 | NEPHROS INC (NEPH) | Grant/award (A): 2,418 @ $0 | EDGAR |
| 2026-06-22 | 4 | MAMMOTH ENERGY SERVICES, INC. (TUSK) jointly with Amron Holdings LLC | Other (J): 19,121 @ $0 · Other (J): 10,329 @ $0 | EDGAR |
| 2026-06-15 | 4 | MAMMOTH ENERGY SERVICES, INC. (TUSK) | Purchase (P): 2,500 @ $3.22 · Purchase (P): 2,000 @ $3.28 | EDGAR |
| 2026-06-12 | 4 | NEPHROS INC (NEPH) | Grant/award (A): 3,574 @ $0 | EDGAR |
| 2026-05-28 | 4 | MAMMOTH ENERGY SERVICES, INC. (TUSK) | Purchase (P): 2,500 @ $3.24 · Purchase (P): 3,000 @ $3.25 | EDGAR |
| 2026-03-18 | 4 | NEPHROS INC (NEPH) | Grant/award (A): 3,610 @ $0 | EDGAR |
| 2025-12-15 | 4 | MAMMOTH ENERGY SERVICES, INC. (TUSK) | Purchase (P): 10,000 @ $1.89 | EDGAR |
| 2025-11-13 | 4 | NEPHROS INC (NEPH) | Grant/award (A): 5,391 @ $0 | EDGAR |
| 2025-01-03 | 4 | NEPHROS INC (NEPH) | Grant/award (A): 22,418 @ $0 · Grant/award (A): 7,050 (derivative) @ $0 | EDGAR |
| 2024-12-16 | 4 | MAMMOTH ENERGY SERVICES, INC. (TUSK) | Purchase (P): 1,000 @ $2.97 | EDGAR |
| 2024-06-14 | 4 | MAMMOTH ENERGY SERVICES, INC. (TUSK) | Grant/award (A): 27,856 @ $0 | EDGAR |
| 2024-05-30 | 4 | NEPHROS INC (NEPH) | Purchase (P): 2,000 @ $2.22 · Purchase (P): 3,000 @ $2.24 | EDGAR |
| 2024-05-30 | 4 | MAMMOTH ENERGY SERVICES, INC. (TUSK) | Purchase (P): 2,000 @ $3.57 · Purchase (P): 3,000 @ $3.65 | EDGAR |
| 2024-05-16 | 4 | NEPHROS INC (NEPH) | Grant/award (A): 7,323 (derivative) @ $0 | EDGAR |
| 2024-03-14 | 4 | NEPHROS INC (NEPH) | Purchase (P): 7,000 @ $2.45 · Other (J): 91,463 @ $0 | EDGAR |
| 2024-03-14 | 4 | MAMMOTH ENERGY SERVICES, INC. (TUSK) | Purchase (P): 3,000 @ $3.72 | 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.
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