HELMER MAUREEN O (CIK 1279977) reported 7 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-06-16). Recent activity: Buy PLUG (39,753 shares), Sell PLUG (50,000 shares), Buy PLUG (13,959 shares), Buy PLUG (11,803 shares), Buy PLUG (76,531 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-16 | PLUG POWER INC (PLUG) | Director | Buy | 39,753 | $0 |
| 2026-06-10 | PLUG POWER INC (PLUG) | Director | Sell | 50,000 | $161,620 |
| 2026-01-06 | PLUG POWER INC (PLUG) | Director | Buy | 13,959 | $27,499 |
| 2025-10-03 | PLUG POWER INC (PLUG) | Director | Buy | 11,803 | $27,501 |
| 2025-07-24 | PLUG POWER INC (PLUG) | Director | Buy | 76,531 | $0 |
| 2025-07-03 | PLUG POWER INC (PLUG) | Director | Buy | 18,456 | $27,499 |
| 2025-04-03 | PLUG POWER INC (PLUG) | Director | Buy | 20,370 | $27,500 |
Source: SEC Form 4 filings · as of 2026-06-16