Insiders / Ambrose Allison
Ambrose Allison
CIK 2047381personinsider
Companies
1
First seen
Jan 6, 2026
Last activity
Mar 17, 2026
Companies
| Company | Shares held | Latest |
|---|---|---|
| Upstream Bio, Inc. · UPB | 16,525 | — |
All securities held
2 positions · latest reported per filing
| Company | Security | Shares |
|---|---|---|
| Upstream Bio, Inc. | Common Stock | 16,525 |
| Upstream Bio, Inc. | Stock Option (Right to Buy)Derivative | 51,000 |
Activity
InsidersInstitutions
This person's insider trades (Form 4), across every company.| Date | Action | Company | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|
| Mar 16, 2026 | Sell | UPB Upstream Bio, Inc. Common Stock | $4.4K | -475 -2.79% | 16,525 0.03% of shares | low |
| Jan 2, 2026 | Grant | UPB Upstream Bio, Inc. Common Stock | $0 | +17K | 17,000 0.03% of shares | low |
| Jan 2, 2026 | Grant | UPB Upstream Bio, Inc. Stock Option (Right to Buy) | — | +51K | 51,000 0.09% of shares | low |