4//SEC Filing
Ambrose Allison 4
Accession 0000950170-25-016460
CIK 0002022626other
Filed
Feb 6, 7:00 PM ET
Accepted
Feb 7, 5:25 PM ET
Size
5.2 KB
Accession
0000950170-25-016460
Insider Transaction Report
Form 4
Ambrose Allison
General Counsel
Transactions
- Award
Stock Option (Right to Buy)
2025-02-06+25,000→ 25,000 totalExercise: $8.53Exp: 2035-02-05→ Common Stock (25,000 underlying)
Footnotes (1)
- [F1]The shares underlying this option shall vest in forty-eight equal monthly installments following February 6, 2025, subject to the Reporting Person's continued service on each such vesting date.
Documents
Issuer
Upstream Bio, Inc.
CIK 0002022626
Entity typeother
Related Parties
1- filerCIK 0002047381
Filing Metadata
- Form type
- 4
- Filed
- Feb 6, 7:00 PM ET
- Accepted
- Feb 7, 5:25 PM ET
- Size
- 5.2 KB