NIGGLI MICHAEL R (CIK 1377160) reported 1 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2025-10-15). Recent activity: Buy GWH (13,513 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2025-10-15 | ESS Tech, Inc. (GWH) | Director | Buy | 13,513 | $0 |
来源：SEC Form 4 申报文件 · 截至 2025-10-15