| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| MATSUI CONNIE | Director | C/O SUTRO BIOPHARMA, INC., 111 OYSTER POINT BLVD., SOUTH SAN FRANCISCO | /s/ David Pauling as attorney-in-fact for Connie Matsui | 16 Oct 2025 | 0001236537 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | STRO | Common Stock | Purchase | $39,950 | +50,000 | $0.7990 | 50,000 | 15 Oct 2025 | Direct |