| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Chung Jane | Chief Executive Officer, Director | C/O SUTRO BIOPHARMA, INC., 111 OYSTER POINT BLVD., SOUTH SAN FRANCISCO | /s/ David Pauling as attorney-in-fact for Jane Chung | 16 Oct 2025 | 0001872398 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | STRO | Common Stock | Purchase | $10,011 | +12,500 | +11% | $0.8009 | 122,850 | 15 Oct 2025 | Direct |