William J. Newell - Mar 5, 2024 Form 4 Insider Report for SUTRO BIOPHARMA, INC. (STRO)

Role
CEO, Director
Signature
/s/ Edward C. Albini as attorney-in-fact for William J. Newell
Stock symbol
STRO
Transactions as of
Mar 5, 2024
Transactions value $
-$30,373
Form type
4
Date filed
3/7/2024, 04:31 PM
Previous filing
Mar 6, 2024

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction STRO Common Stock Options Exercise $0 +18.8K +9.01% $0.00 227K Mar 5, 2024 Direct
transaction STRO Common Stock Tax liability -$30.4K -6.69K -2.95% $4.54 220K Mar 5, 2024 Direct F1
holding STRO Common Stock 117K Mar 5, 2024 By William J. Newell Family Trust DTD 03/15/2019 F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction STRO Stock Option (Right to Buy Common Stock) Award $0 +174K $0.00 174K Mar 5, 2024 Common Stock 174K $4.54 Direct F3
transaction STRO Restricted Stock Units (RSUs) Award $0 +131K $0.00 131K Mar 5, 2024 Common Stock 131K Direct F4, F5
transaction STRO Restricted Stock Unit (RSU) Options Exercise $0 -18.8K -50% $0.00 18.8K Mar 5, 2024 Common Stock 18.8K Direct F4, F6
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

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 The securities are held of record by the reporting person as trustee of the William J. Newell Family Trust DTD 03/15/2019.
F3 The option vests as to 2.0833% of the total award monthly, beginning on April 1, 2024, with 100% of the award being vested and exercisable on March 1, 2028, subject to the reporting person's continued service to the Issuer on each vesting date.
F4 Each RSU represents a contingent right to receive one (1) share of the Issuer's Common Stock upon settlement.
F5 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.
F6 The RSUs vest as to 1/4th of the total award annually beginning on March 5, 2022, subject to continued service through each vesting date.