GRAY MICHAEL 4
4 · Upstream Bio, Inc. · Filed Jan 6, 2026
Insider Transaction Report
Form 4
GRAY MICHAEL
CFO and COO
Transactions
- Award
Common Stock
2026-01-02+30,500→ 30,500 total - Award
Stock Option (Right to Buy)
2026-01-02+91,500→ 91,500 totalExercise: $27.07Exp: 2036-01-01→ Common Stock (91,500 underlying)
Footnotes (2)
- [F1]Represents restricted stock units ("RSUs") granted pursuant to the Issuer's 2024 Stock Option and Incentive Plan. Each RSU represents the contingent right to receive one share of the Issuer's Common Stock upon vesting. The RSUs shall vest in sixteen equal quarterly installments following January 1, 2026, subject to the Reporting Person's continued service on each such vesting date.
- [F2]The shares underlying this option shall vest in forty-eight equal monthly installments following January 1, 2026, subject to the Reporting Person's continued service on each such vesting date.