| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| FITZPATRICK LINDA A | CHIEF PEOPLE & COMM. OFFICER | C/O SUTRO BIOPHARMA, INC., 111 OYSTER POINT BLVD., SOUTH SAN FRANCISCO | /s/ David Pauling as attorney-in-fact for Linda A. Fitzpatrick | 05 May 2025 | 0001188953 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | STRO | Common Stock | Options Exercise | $0 | +9,125 | +9.6% | $0.000000 | 104,558 | 01 May 2025 | Direct | |
| transaction | STRO | Common Stock | Options Exercise | $0 | +9,740 | +9.3% | $0.000000 | 114,298 | 01 May 2025 | Direct | |
| transaction | STRO | Common Stock | Options Exercise | $0 | +13,140 | +11% | $0.000000 | 127,438 | 01 May 2025 | Direct | |
| transaction | STRO | Common Stock | Options Exercise | $0 | +5,844 | +4.6% | $0.000000 | 133,282 | 01 May 2025 | Direct | |
| transaction | STRO | Common Stock | Tax liability | $14,486 | -13,538 | -10% | $1.07 | 119,744 | 01 May 2025 | Direct | F1 |
| holding | STRO | Common Stock | 10,383 | 01 May 2025 | Michael A. & Linda A. Fitzpatrick Family Trust dated 10/13/1997 | F2 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | STRO | Restricted Stock Unit (RSU) | Options Exercise | $0 | -9,125 | -100% | $0.000000 | 0 | 01 May 2025 | Common Stock | 9,125 | Direct | F3, F4, F5 | |
| transaction | STRO | Restricted Stock Unit (RSU) | Options Exercise | $0 | -9,740 | -71% | $0.000000 | 4,010 | 01 May 2025 | Common Stock | 9,740 | Direct | F3, F5, F6 | |
| transaction | STRO | Restricted Stock Unit (RSU) | Options Exercise | $0 | -13,140 | -47% | $0.000000 | 14,685 | 01 May 2025 | Common Stock | 13,140 | Direct | F3, F5, F7 | |
| transaction | STRO | Restricted Stock Unit (RSU) | Options Exercise | $0 | -5,844 | -47% | $0.000000 | 6,531 | 01 May 2025 | Common Stock | 5,844 | Direct | F3, F5, F7 |
LINDA A. FITZPATRICK is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may continue.
| Id | Content |
|---|---|
| F1 | Represents the number of shares of Common Stock that have been withheld by the issuer to satisfy its income tax withholding and remittance obligations in connection with the net settlement of restricted stock units; does not represent a sale by the reporting person. |
| F2 | These securities are held of record by Michael A. Fitzpatrick and Linda A. Fitzpatrick, Trustees of the Michael A. & Linda A. Fitzpatrick Family Trust dated 10/13/1997. |
| F3 | Each RSU represents a contingent right to receive one (1) share of the issuer's Common Stock upon settlement. |
| F4 | The RSUs vest as to 1/4th of the total shares annually beginning on March 4, 2023, subject to continued service through each vesting date. |
| F5 | The reported transaction represents the accelerated vesting of certain of the reporting person's equity awards outstanding under the issuer's 2018 Equity Incentive Plan, in connection with her separation and transition from her position with the issuer. |
| F6 | The RSUs vest as to 1/4th of the total shares annually beginning on March 1, 2024, subject to continued service through each vesting date. |
| F7 | The RSUs vest as to 1/4th of the total award annually beginning on March 1, 2025, subject to continued service through each vesting date. |