Venkatesh Srinivasan - 01 May 2025 Form 4 Insider Report for SUTRO BIOPHARMA, INC. (STRO)

Role: CHIEF TECH OP OFFICER
Signature: /s/ David Pauling as attorney-in-fact for Venkatesh Srinivasan
Issuer symbol: STRO
Transactions as of: 01 May 2025
Net transactions value: -$957
Form type: 4
Filing time: 05 May 2025, 17:46:19 UTC
Previous filing: 15 Apr 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Srinivasan Venkatesh	CHIEF TECH OP OFFICER	C/O SUTRO BIOPHARMA, INC., 111 OYSTER POINT BLVD., SOUTH SAN FRANCISCO	/s/ David Pauling as attorney-in-fact for Venkatesh Srinivasan	05 May 2025	0001974888

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	STRO	Common Stock	Options Exercise	$0	+2,500	+4.8%	$0.000000	54,580	01 May 2025	Direct
transaction	STRO	Common Stock	Tax liability	$957	-894	-1.6%	$1.07	53,686	01 May 2025	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	Restricted Stock Unit (RSU)	Options Exercise	$0	-2,500	-33%	$0.000000	5,000	01 May 2025	Common Stock	2,500		Direct	F2, F3

* 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 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	Each RSU represents a contingent right to receive one (1) share of the issuer's Common Stock upon settlement.
F3	The RSUs vest as to 1/4th of the total award annually beginning on May 1, 2024, subject to continued service through each vesting date.