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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1382101	Sutro Biopharma Inc.	STRO	()	4

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1309660	J William Newell	C/O Sutro Biopharma, Inc. 111 Oyster Point Blvd. South San Francisco CA 94080	Ceo	Yes	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2022-03-14	10,000	$7.75	116,525	No	4	P	Indirect	By William J. Newell Family Trust DTD 03/15/2019

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	By William J. Newell Family Trust DTD 03/15/2019

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	10,577	Indirect	By Newell Family Revocable Trust DTD 08/14/2008
Common Stock	113,460	Direct

Footnotes

The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $7.68 to$7.85 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of theSecurities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price withinthe range set forth in this footnote.
The securities are held of record by the reporting person as trustee of the William J. Newell Family Trust DTD 03/15/2019.
The securities are held of record by the reporting person as trustee of the Newell Family Revocable Trust DTD 08/14/2008.