Houghton Adam (CIK 2031691) reported 4 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-09-17). Recent activity: Sell UPB (700 shares), Sell UPB (700 shares), Sell UPB (699 shares), Buy UPB (25,000 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-17 | Upstream Bio, Inc. (UPB) | Chief Business Officer | Sell | 700 | $3,843 |
| 2026-06-17 | Upstream Bio, Inc. (UPB) | Chief Business Officer | Sell | 700 | $4,270 |
| 2026-03-17 | Upstream Bio, Inc. (UPB) | Chief Business Officer | Sell | 699 | $6,494 |
| 2026-01-06 | Upstream Bio, Inc. (UPB) | Chief Business Officer | Buy | 25,000 | $0 |
来源：SEC Form 4 申报文件 · 截至 2026-09-17