Daniel H. Petree - 08 Feb 2022 Form 4 Insider Report for SUTRO BIOPHARMA, INC. (STRO)

Role: Director
Signature: /s/ Edward C. Albini as attorney-in-fact
Issuer symbol: STRO
Transactions as of: 08 Feb 2022
Net transactions value: +$72,564
Form type: 4
Filing time: 09 Feb 2022, 17:28:38 UTC
Previous filing: 07 Jun 2021
Next filing: 08 Jun 2022
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	STRO	Common Stock	Options Exercise	$19,816	+4,545	+57%	$4.36	12,533	08 Feb 2022	Direct
transaction	STRO	Common Stock	Options Exercise	$11,410	+2,617	+21%	$4.36	15,150	08 Feb 2022	Direct
transaction	STRO	Common Stock	Options Exercise	$3,358	+578	+3.8%	$5.81	15,728	08 Feb 2022	Direct
transaction	STRO	Common Stock	Options Exercise	$5,072	+873	+5.6%	$5.81	16,601	08 Feb 2022	Direct
transaction	STRO	Common Stock	Options Exercise	$12,340	+2,124	+13%	$5.81	18,725	08 Feb 2022	Direct
transaction	STRO	Common Stock	Options Exercise	$20,567	+3,540	+19%	$5.81	22,265	08 Feb 2022	Direct
holding	STRO	Common Stock						192	08 Feb 2022	Daniel H. Petree and Susan Toeniskoetter Trust dated July 25, 1997	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)	Options Exercise	$0	-4,545	-100%	$0.000000^*	0	08 Feb 2022	Common Stock	4,545	$4.36	Direct	F2
transaction	STRO	Stock Option (right to buy)	Options Exercise	$0	-2,617	-100%	$0.000000^*	0	08 Feb 2022	Common Stock	2,617	$4.36	Direct	F2
transaction	STRO	Stock Option (right to buy)	Options Exercise	$0	-578	-100%	$0.000000^*	0	08 Feb 2022	Common Stock	578	$5.81	Direct	F2
transaction	STRO	Stock Option (right to buy)	Options Exercise	$0	-873	-100%	$0.000000^*	0	08 Feb 2022	Common Stock	873	$5.81	Direct	F2
transaction	STRO	Stock Option	Options Exercise	$0	-2,124	-100%	$0.000000^*	0	08 Feb 2022	Common Stock	2,124	$5.81	Direct	F2
transaction	STRO	Stock Option	Options Exercise	$0	-3,540	-100%	$0.000000^*	0	08 Feb 2022	Common Stock	3,540	$5.81	Direct	F2

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

Explanation of Responses:

Id	Content
F1	These securities are held of record by the reporting person and his spouse as trustees of the Daniel H. Petree and Susan M. Toeniskoetter Trust dated July 25, 1997.
F2	The option is fully vested and exercisable.