Sutro Biopharma STRO Institutional Ownership

NASDAQ STRO

$20.10 -0.44 (-2.14%)

As of: Sep 4, 2026 · 2:20 PM EDT

Institutions by Trading Activity

101 Institutions

Increased 67 66.3%

Unchanged 15 14.9%

Reduced 19 18.8%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

99.75%

▼-69.72 pp QoQ

Shares Held by Institutions

16.53Mn

of 16.57Mn outstanding

▲+29.77% QoQ

Shares Outstanding

16.57Mn

42.16K held outside 13F filers

Institutional Investors

101

filed 13F for Jun 2026

▲+23 vs prior quarter

Net Shares Added (QoQ)

+3.79Mn

accumulated since last quarter

Value of Holdings

$339.51Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Sutro Biopharma, Inc. (NASDAQ:STRO) showed up in the 13F filings of 101 institutional investors as of June 2026.

These investors held 99.7% of outstanding shares in June 2026, down from 169.5% in March 2026.
They increased total shares held in STRO by 29.77% quarter over quarter, and investors in Sutro Biopharma stayed flat from a year ago.
During the quarter, 67 of these 101 funds increased positions in STRO, 19 reduced exposure, and 15 held steady.
Combined, these investors held 16.53Mn shares in STRO for June 2026, up by 3.79Mn shares quarter on quarter, and up 10.96Mn shares year over year.
As of June 30, 2026, the biggest holder of Sutro Biopharma is PERCEPTIVE ADVISORS LLC at 1.3Mn shares, representing 7.87% of shares outstanding.
Leading buyers of Sutro Biopharma shares for the quarter ending June 2026 were BlackRock, Inc. (889.97K), PERCEPTIVE ADVISORS LLC (589.54K), Merck & Co., Inc. (272.35K), State Street Corp (253.86K), BALYASNY ASSET MANAGEMENT L.P. (245.37K).
Leading sellers of Sutro Biopharma shares for the quarter ending June 2026 were Point72 Asset Management, L.P. (454.28K), UBS Group AG (184.36K), EVENTIDE ASSET MANAGEMENT, LLC (130.05K), ADAR1 Capital Management, LLC (120.43K), SUSQUEHANNA INTERNATIONAL GROUP, LLP (76.48K).
Per Business Quant data, the top 10 holders of Sutro Biopharma for the quarter ending June 2026 are PERCEPTIVE ADVISORS LLC (1.3Mn), BVF INC/IL (1.25Mn), Affinity Asset Advisors, LLC (1.17Mn), BlackRock, Inc. (1.12Mn), Samsara BioCapital, LLC (1.06Mn), Kynam Capital Management, LP (872.56K), ORBIMED ADVISORS LLC (743.94K), BALYASNY ASSET MANAGEMENT L.P. (711.16K), VANGUARD CAPITAL MANAGEMENT LLC (694.22K), EVENTIDE ASSET MANAGEMENT, LLC (585.26K).

Form 13F Holdings

101 Institutional Holders

Report period 30 Jun, 2026

Total shares held 16.53Mn

Of outstanding 99.75%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	PERCEPTIVE ADVISORS LLC	0001224962	1,304,846	7.87%	▲589,539	+82.42%	$43.32Mn
2	BVF INC/IL	0001056807	1,251,788	7.55%	0	0.00%	$41.56Mn
3	Affinity Asset Advisors, LLC	0001773195	1,172,487	7.08%	▲102,968	+9.63%	$38.93Mn
4	BlackRock, Inc.	0002012383	1,122,655	6.77%	▲889,971	+382.48%	$37.27Mn
5	Samsara BioCapital, LLC	0001744967	1,062,872	6.41%	0	0.00%	$35.29Mn
6	Kynam Capital Management, LP	0001907884	872,558	5.27%	0	0.00%	$28.97Mn
7	ORBIMED ADVISORS LLC	0001055951	743,944	4.49%	▼57,200	-7.14%	$24.70Mn
8	BALYASNY ASSET MANAGEMENT L.P.	0001218710	711,162	4.29%	▲245,370	+52.68%	$23.61Mn
9	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	694,219	4.19%	▼26,223	-3.64%	$23.05Mn
10	EVENTIDE ASSET MANAGEMENT, LLC	0001442891	585,262	3.53%	▼130,045	-18.18%	$19.43Mn
11	Velan Capital Investment Management LP	0001848809	512,160	3.09%	0	0.00%	$17.00Mn
12	Woodline Partners LP	0001784547	458,029	2.76%	▲588	+0.13%	$15.21Mn
13	ADAR1 Capital Management, LLC	0001940272	404,014	2.44%	▼120,427	-22.96%	$13.41Mn
14	GEODE CAPITAL MANAGEMENT, LLC	0001214717	389,692	2.35%	▲218,306	+127.38%	$12.94Mn
15	ACADIAN ASSET MANAGEMENT LLC	0000916542	373,839	2.26%	▲38,026	+11.32%	$12.41K
16	MILLENNIUM MANAGEMENT LLC	0001273087	365,972	2.21%	▲155,594	+73.96%	$12.15Mn
17	State Street Corp	0000093751	305,979	1.85%	▲253,861	+487.09%	$10.16Mn
18	Merck & Co., Inc.	0000310158	272,351	1.64%	▲272,351	0.00%	$9.04Mn
19	ACUTA CAPITAL PARTNERS, LLC	0001582844	270,251	1.63%	▲826	+0.31%	$8.97Mn
20	Ameriprise Financial Inc	0000820027	244,669	1.48%	▲244,669	0.00%	$8.12Mn

Showing 1 to 20 of 101 holders