Edward C. Albini - Mar 5, 2024 Form 4 Insider Report for SUTRO BIOPHARMA, INC. (STRO)

Role
CFO AND SECRETARY
Signature
/s/ Edward C. Albini
Stock symbol
STRO
Transactions as of
Mar 5, 2024
Transactions value $
-$14,074
Form type
4
Date filed
3/7/2024, 04:21 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 +8.75K +8.66% $0.00 110K Mar 5, 2024 Direct
transaction STRO Common Stock Tax liability -$14.1K -3.1K -2.82% $4.54 107K Mar 5, 2024 Direct F1

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 +68K $0.00 68K Mar 5, 2024 Common Stock 68K $4.54 Direct F2
transaction STRO Restricted Stock Units (RSUs) Award $0 +51K $0.00 51K Mar 5, 2024 Common Stock 51K Direct F3, F4
transaction STRO Restricted Stock Unit (RSU) Options Exercise $0 -8.75K -50% $0.00 8.75K Mar 5, 2024 Common Stock 8.75K Direct F3, F5
* 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 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.
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 award annually beginning on March 1, 2025, subject to continued service through each vesting date.
F5 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.