Sutro Biopharma, Inc. STRO NASDAQ

NASDAQ Global Market • Healthcare • Biotechnology • US • USD

SharesGrow Score

42/100

1/7 Pass

SharesGrow Intrinsic Value

Sutro Biopharma, Inc. (STRO) has 20 known insider and institutional holders on record. The largest holder is MOLINA ARTURO MD with 37,500 shares. Other notable holders include Freund John Gordon and NEWELL WILLIAM J.

Over the last 12 months, insiders have made 44 transactions in STRO stock — 28 buys (valued at $796.23K) and 0 sells (valued at RSU Award). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.

STRO Insider Ownership

Top Holder

MOLINA ARTURO MD

37,500 shares

Buys (12 mo)

$796.23K value

Sells (12 mo)

$0.00 value

12-Month Transaction Activity

Buy 64%

Sell 0%

Top Insider Holders

#	Name	Role	Shares Owned	Last Filed	Relative Size
1	Molina Arturo Md	Chief Medical Officer	37,500	2022-03-07	100%
2	Freund John Gordon	Director	35,000	2024-06-10	93%
3	Newell William J	CEO	31,125	2025-03-06	83%
4	Worsley Stephen	Chief Business Officer	30,000	2019-01-31	80%
5	Lawlis V Bryan	Director	26,033	2018-09-27	69%
6	Sharp Shalini	Director	18,500	2022-06-08	49%
7	Borgman Anne Elizabeth	Chief Medical Officer	17,812	2025-05-05	47%
8	Shabbir Anik	Chief Technical Ops. Officer	17,500	2023-03-07	47%
9	Leyman Barbara	Chief Business Officer	16,056	2025-08-26	43%
10	Albini Edward C	CFO and Secretary	15,750	2025-03-04	42%
11	Shtylla Brunilda	Chief Business Officer	12,928	2023-08-28	34%
12	Janney Daniel	Director	11,610	2019-06-19	31%
13	Fitzpatrick Linda A	Chief People & Comm. Officer	9,125	2025-03-06	24%
14	Hallam Trevor	Pres. Rsrch & Cf. Sctific Ofcr	7,500	2023-04-17	20%
15	Vasquez Nicki	Chief Port. Strat & Alnce Ofcr	6,500	2023-07-13	17%
16	Chow Gregory K.	CFO	5,000	2026-03-03	13%
17	Srinivasan Venkatesh	Chief Tech Op Officer	5,000	2025-05-05	13%
18	Ross Michael Jay	10 Percent Owner	4,315	2018-10-01	12%
19	Svlsf V, Llc	10 Percent Owner	4,315	2018-10-01	12%
20	Gerber Hans-peter	Chief Scientific Officer	2,250	2026-03-03	6%

Recent Transactions (last 12 months)

Date	Name	Role	Type	Shares	Price	Value
2026-03-04	Pauling David	Chief Admin. Ofcr. & Gc	Option Exercise (Sell)	675	-	-
2026-03-04	Chung Jane	Chief Executive Officer	Option Exercise (Sell)	788	-	-
2026-03-02	Pauling David	Chief Admin. Ofcr. & Gc	RSU Award	4,200	-	-
2026-03-01	Pauling David	Chief Admin. Ofcr. & Gc	Option Exercise (Sell)	500	-	-
2026-03-02	Gerber Hans-peter	Chief Scientific Officer	RSU Award	5,000	-	-
2026-03-01	Gerber Hans-peter	Chief Scientific Officer	Option Exercise (Sell)	1,125	-	-
2026-03-02	Chung Jane	Chief Executive Officer	Tax Withholding of RSU	2,779	$20.55	$57.11K
2026-03-01	Chung Jane	Chief Executive Officer	Option Exercise (Sell)	688	-	-
2026-03-02	Chow Gregory K.	CFO	RSU Award	5,000	-	-
2025-12-23	Pauling David	Chief Admin. Ofcr. & Gc	RSU Award	7,200	$10.38	$74.74K
2025-12-23	Gerber Hans-peter	Chief Scientific Officer	RSU Award	7,925	$10.38	$82.26K
2025-12-23	Hunter Heidi	Director	RSU Award	1,500	$10.38	$15.57K
2025-12-23	Chow Gregory K.	CFO	RSU Award	8,200	$10.38	$85.12K
2025-12-23	Dybbs Michael	Director	RSU Award	1,500	$10.38	$15.57K
2025-12-23	Wigginton Jon Marc	Director	RSU Award	1,500	$10.38	$15.57K
2025-12-23	Jagpal Sukhi	Director	RSU Award	1,500	$10.38	$15.57K
2025-12-23	Lobacki Joseph M	Director	RSU Award	1,500	$10.38	$15.57K
2025-12-23	Petree Daniel H	Director	RSU Award	1,500	$10.38	$15.57K
2025-12-23	Matsui Connie	Director	RSU Award	1,500	$10.38	$15.57K
2025-12-23	Panek James P	Director	RSU Award	1,500	$10.38	$15.57K
2025-12-12	Chung Jane	Chief Executive Officer	Option Exercise (Sell)	2,500	-	-
2025-10-15	Pauling David	Chief Admin. Ofcr. & Gc	Informative Buy	12,504	$0.80	$9.99K
2025-10-15	Gerber Hans-peter	Chief Scientific Officer	Informative Buy	17,000	$0.80	$13.61K
2025-10-15	Chung Jane	Chief Executive Officer	Informative Buy	12,500	$0.80	$10.01K
2025-10-15	Chow Gregory K.	CFO	Informative Buy	19,750	$0.81	$16K