Song Haiyan (CIK 1804708) reported 4 SEC Form 4 insider transactions across 2 companies over the past 18 months (most recent 2026-09-15). Recent activity: Buy EOSE (10,000 shares), Buy EOSE (5,000 shares), Sell CSGS (22,560 shares), Buy CSGS (3,085 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-15 | Eos Energy Enterprises, Inc. (EOSE) | Director | Buy | 10,000 | $39,500 |
| 2026-09-15 | Eos Energy Enterprises, Inc. (EOSE) | Director | Buy | 5,000 | $19,200 |
| 2026-05-18 | CSG SYSTEMS INTERNATIONAL INC (CSGS) | Director | Sell | 22,560 | $1.8M |
| 2025-06-11 | CSG SYSTEMS INTERNATIONAL INC (CSGS) | Director | Buy | 3,085 | $0 |
来源：SEC Form 4 申报文件 · 截至 2026-09-15