Ambrose Allison (CIK 2047381) reported 4 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-09-17). Recent activity: Sell UPB (485 shares), Sell UPB (477 shares), Sell UPB (475 shares), Buy UPB (17,000 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-17 | Upstream Bio, Inc. (UPB) | General Counsel | Sell | 485 | $2,663 |
| 2026-06-17 | Upstream Bio, Inc. (UPB) | General Counsel | Sell | 477 | $2,910 |
| 2026-03-17 | Upstream Bio, Inc. (UPB) | General Counsel | Sell | 475 | $4,413 |
| 2026-01-06 | Upstream Bio, Inc. (UPB) | General Counsel | Buy | 17,000 | $0 |
来源：SEC Form 4 申报文件 · 截至 2026-09-17