Ambrose Allison has filed 5 insider transactions across 1 company since December 2024.
Most recent transaction: a sale of 475 shares of Upstream Bio, Inc. ($UPB) on March 16, 2026.
Activity breakdown: 0 open-market purchases and 1 sale.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 16, 2026 | Upstream Bio, Inc. | $UPB | Ambrose Allison | General Counsel | S | Common Stock | 475 | $9.29 | 16,525.0000 | 54,038,591 | 2.79% | 0.00% |
| Jan. 2, 2026 | Upstream Bio, Inc. | $UPB | Ambrose Allison | General Counsel | A | Common Stock | 17000 | $0.00 | 17,000.0000 | 54,038,591 | 9999.99% | 0.03% |
| Jan. 2, 2026 | Upstream Bio, Inc. | $UPB | Ambrose Allison | General Counsel | A | Stock Option (Right to Buy) | 51000 | $0.00 | 51,000.0000 | 54,038,591 | 9999.99% | 0.09% |
| Feb. 6, 2025 | Upstream Bio, Inc. | $UPB | Ambrose Allison | General Counsel | A | Stock Option (Right to Buy) | 25000 | $0.00 | 25,000.0000 | 0 | 9999.99% | 0.00% |
| Dec. 16, 2024 | Upstream Bio, Inc. | $UPB | Ambrose Allison | General Counsel | A | Stock Option (Right to Buy) | 100000 | $0.00 | 100,000.0000 | 0 | 9999.99% | 0.00% |