GRAY MICHAEL (CIK 1271411) reported 4 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-09-17). Recent activity: Sell UPB (853 shares), Sell UPB (853 shares), Sell UPB (852 shares), Buy UPB (30,500 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-17 | Upstream Bio, Inc. (UPB) | CFO and COO | Sell | 853 | $4,683 |
| 2026-06-17 | Upstream Bio, Inc. (UPB) | CFO and COO | Sell | 853 | $5,203 |
| 2026-03-17 | Upstream Bio, Inc. (UPB) | CFO and COO | Sell | 852 | $7,915 |
| 2026-01-06 | Upstream Bio, Inc. (UPB) | CFO and COO | Buy | 30,500 | $0 |
来源：SEC Form 4 申报文件 · 截至 2026-09-17