SUTRO BIOPHARMA INC (STRO) is held by 43 institutional investors that disclose positions via SEC 13F filings. The largest disclosed holder is VANGUARD CAPITAL MANAGEMENT LLC as of Q1 2026.

Are institutions buying or selling STRO?

In Q1 2026, 30 institutions opened or increased positions in SUTRO BIOPHARMA INC while 11 reduced or exited — a net buying quarter.

What is the Smart Money Verdict on STRO?

The Smart Money Verdict combines four independent sources (institutional 13F activity, insider trades, activist filings, and congressional trades) into a single assessment for SUTRO BIOPHARMA INC.

How many hedge funds hold STRO?

43 institutional investors report holding SUTRO BIOPHARMA INC (STRO) as of Q1 2026, based on SEC 13F filings.

Is institutional money flowing into STRO?

As of Q1 2026, tracked institutions in SUTRO BIOPHARMA INC show 30 buyers versus 11 sellers — net inflows.

SUTRO BIOPHARMA INC

STRO·869367201·US·Common Stock·Healthcare - Biotechnology-13D/G

Holders

Avg rating(7 Elite)

$132.1M

Total Value

73% (46)

Fund Consensus

30 buying - 11 selling

Smart Money Verdict

View all

Held by 43 funds

7 elite

Who's Trading

ActivistKYKynam Capital Management, LP5.3%May 15, 2026

ActivistAAAffinity Asset Advisors, LLC6.5%May 14, 2026

Activist

Point72 Asset Management, L.P.5.7%May 1, 2026

Activist

Millennium Management LLC1.3%Apr 21, 2026

ActivistPAPerceptive Advisors LLC5.4%Apr 21, 2026

ActivistBVBIOTECHNOLOGY VALUE FUND L P4.1%Feb 18, 2026

InsiderCJChung JaneBuy $10KOct 15, 2025

InsiderGHGerber Hans-PeterBuy $14KOct 15, 2025

InsiderPDPauling DavidBuy $10KOct 15, 2025

InsiderMCMATSUI CONNIEBuy $40KOct 15, 2025

View all insider trades View all activist filings

13F: Mar 31, 2026Insider & Congress: Updated regularly

Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
VAVANGUARD CAPITAL MANAGEMENT LLC	New	720,442	$17.9M	0.0%	+50.91%	39
RA CAPITAL MANAGEMENT, L.P.	New	715,307	$17.8M	0.2%	+50.91%	47
Point72 Asset Management, L.P.	Increased	692,111(+286.5%)	$17.2M	0.0%	+68.71%	46
BALYASNY ASSET MANAGEMENT L.P.	Increased	465,792(+102.5%)	$11.6M	0.0%	+88.95%	45
Woodline Partners LP	New	457,441	$11.4M	0.0%	+50.91%	39
UBS Group AG	Increased	392,871(+4892.0%)	$9.8M	0.0%	+52.62%	45
BlackRock, Inc.	Increased	232,684(+98.1%)	$5.8M	0.0%	+55.70%	44
MWMARSHALL WACE, LLP	Increased	222,634(+160.0%)	$5.5M	0.0%	+99.11%	44
MILLENNIUM MANAGEMENT LLC	Decreased	210,378(-49.7%)	$5.2M	0.0%	+160.48%	0
AGADAGE CAPITAL PARTNERS GP, L.L.C.	Unchanged	200,000	$5M	0.0%	-20.65%	0
GEODE CAPITAL MANAGEMENT, LLC	Increased	171,386(+104.1%)	$4.3M	0.0%	-42.83%	43
CITADEL ADVISORS LLC	Increased	117,537(+266.3%)	$2.9M	0.0%	+69.81%	42
RENAISSANCE TECHNOLOGIES LLC	Decreased	97,824(-20.4%)	$2.4M	0.0%	+20.34%	0
VFVANGUARD FIDUCIARY TRUST CO	New	94,838	$2.4M	0.0%	+50.91%	36
SUSQUEHANNA INTERNATIONAL GROUP, LLP	New	84,902	$2.1M	0.0%	+50.91%	36
TWO SIGMA INVESTMENTS, LP	Increased	65,176(+40.2%)	$1.6M	0.0%	+61.36%	34
STATE STREET CORP	Increased	52,118(+52.1%)	$1.3M	0.0%	-8.34%	24
Fisher Asset Management, LLC	Decreased	35,295(-0.0%)	$879,198	0.0%	-12.07%	0
Trexquant Investment LP	New	34,343	$855,484	0.0%	+50.91%	34
NORTHERN TRUST CORP	Increased	33,166(+130.7%)	$826,165	0.0%	-49.18%	40