Amron Arthur H (CIK 1179697) reported 14 SEC Form 4 insider transactions across 2 companies over the past 18 months (most recent 2026-09-16). Recent activity: Buy NEPH (17,749 shares), Buy NEPH (2,836 shares), Buy NEPH (22,710 shares), Buy NEPH (2,418 shares), Buy TUSK (19,121 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-16 | NEPHROS INC (NEPH) | Director | Buy | 17,749 | $0 |
| 2026-09-16 | NEPHROS INC (NEPH) | Director | Buy | 2,836 | $0 |
| 2026-09-16 | NEPHROS INC (NEPH) | Director | Buy | 22,710 | $89,704 |
| 2026-08-14 | NEPHROS INC (NEPH) | Director | Buy | 2,418 | $0 |
| 2026-06-22 | MAMMOTH ENERGY SERVICES, INC. (TUSK) | Director | Buy | 19,121 | $0 |
| 2026-06-22 | MAMMOTH ENERGY SERVICES, INC. (TUSK) | Director | Buy | 10,329 | $0 |
| 2026-06-15 | MAMMOTH ENERGY SERVICES, INC. (TUSK) | Director | Buy | 2,500 | $8,050 |
| 2026-06-15 | MAMMOTH ENERGY SERVICES, INC. (TUSK) | Director | Buy | 2,000 | $6,560 |
| 2026-06-12 | NEPHROS INC (NEPH) | Director | Buy | 3,574 | $0 |
| 2026-05-28 | MAMMOTH ENERGY SERVICES, INC. (TUSK) | Director | Buy | 2,500 | $8,100 |
| 2026-05-28 | MAMMOTH ENERGY SERVICES, INC. (TUSK) | Director | Buy | 3,000 | $9,750 |
| 2026-03-18 | NEPHROS INC (NEPH) | Director | Buy | 3,610 | $0 |
| 2025-12-15 | MAMMOTH ENERGY SERVICES, INC. (TUSK) | Director | Buy | 10,000 | $18,900 |
| 2025-11-13 | NEPHROS INC (NEPH) | Director | Buy | 5,391 | $0 |
来源：SEC Form 4 申报文件 · 截至 2026-09-16