David Pauling - 15 Oct 2025 Form 4 Insider Report for SUTRO BIOPHARMA, INC. (STRO)

Role: Chief Admin. Ofcr. & GC
Signature: /s/ David Pauling
Issuer symbol: STRO
Transactions as of: 15 Oct 2025
Net transactions value: +$9,993
Form type: 4
Filing time: 16 Oct 2025, 08:14:21 UTC
Previous filing: 08 Apr 2025
Next filing: 29 Dec 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Pauling David	Chief Admin. Ofcr. & GC	C/O SUTRO BIOPHARMA, INC., 111 OYSTER POINT BLVD., SOUTH SAN FRANCISCO	/s/ David Pauling	16 Oct 2025	0002063633

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	STRO	Common Stock	Purchase	$9,993	+12,504	+21%	$0.7992	71,737	15 Oct 2025	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The reported total includes 2,500 shares of Common Stock acquired by the reporting person in one or more transactions with the Issuer pursuant to its Employee Stock Purchase Plan, which transactions are exempt pursuant to Rules 16a3(f)(1)(i)(B) and 16b3(c).