Sutro Biopharma

STRO • NASDAQ

Sutro Biopharma is a biotechnology company in the healthcare sector on NASDAQ, led by Jane Chung, with a market cap of $83.7M. As of Q3 2025, 63% of shares are held by 84 institutional investors, with SUVRETTA CAPITAL MANAGEMENT, LLC as the largest holder at 7.65%.

Chief Executive OfficerJane Chung

Market Cap$83.7M

Biotechnology

Healthcare

Employees300.0

Websitesutrobio.com

Country

United States of America

Overview

Overview of institutional ownership in STRO as of Q3 2025 with a market cap of $73.6M

All Institutions

Institutions: 84
Value Held: $46.4M
Shares Held: 53.4M
Avg Position: $551.9K
Median Position: $59.7K

Hedge Funds

Hedge Funds: 15
Value Held: $21.9M
Shares Held: 25.2M
Avg Position: $1.5M
Median Position: $387.1K

Ownership Breakdown

Institutional (non-HF)

33.19%

$24.4M

Hedge Funds

29.78%

$21.9M

Retail & Other

37.03%

$27.3M

Based on market cap of $73.6M as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in STRO as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
SUVRETTA CAPITAL MANAGEMENT, LLC Hedge Fund•Long/Short	Aaron Leonard Cowen CEO	$5.6M 0.17% of portfolio	7.65% 6.5M shares	Q1 2020 Held for 5y 8m	$3.3B
K Kynam Capital Management, LP Hedge Fund•Long/Short	Jared Joseph Keller COO	$4.4M 0.33% of portfolio	6.00% 5.1M shares	Q4 2022 Held for 2y 11m	$1.3B
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	Dan Michael Berkovitz Chairman	$3.9M 0.00% of portfolio	5.34% 4.5M shares	Q3 2018 Held for 7y 2m	$121.98B
VANGUARD GROUP INC Institution	Salim Ramji CEO	$3.2M 0.00% of portfolio	4.34% 3.7M shares	Q4 2018 Held for 6y 11m	$6.69T
ACADIAN ASSET MANAGEMENT LLC Long Only Manager	Gillian Morna Therese Savage CEO	$2.9M 0.01% of portfolio	4.00% 3.4M shares	Q1 2019 Held for 6y 8m	$51.5B
V Velan Capital Investment Management LP Institution	-	$2.7M 2.54% of portfolio	3.68% 3.1M shares	Q4 2024 Held for 11 months	$106.5M
T TANG CAPITAL MANAGEMENT LLC Institution	-	$2.5M 0.10% of portfolio	3.34% 2.8M shares	Q1 2025 Held for 8 months	$2.5B
Merck & Co., Inc. Institution	Robert M. Davis CEO	$2.4M 1.09% of portfolio	3.21% 2.7M shares	Q4 2024 Held for 11 months	$217.8M
Vestal Point Capital, LP Hedge Fund•Long/Short	Ryan Christopher Wilder CIO	$2.3M 0.11% of portfolio	3.07% 2.6M shares	Q4 2024 Held for 11 months	$2.0B
Eversept Partners, LLC Hedge Fund•Long/Short	Rishi Rasesh Shah President	$2.0M 0.15% of portfolio	2.70% 2.3M shares	Q2 2023 Held for 2y 5m	$1.3B

Net Capital Flow

Institutional buying and selling activity for STRO in Q3 2025

Traded: −$1.7M
Buyers: 30
Sellers: 53
Total Bought: +$2.4M
Total Sold: −$4.1M
Avg Position: $429.2K

Biggest Buyers

Institution	Net Bought	Current Position
RENAISSANCE TECHNOLOGIES LLC Hedge Fund•Quant	+$444.3K +511.6K shares	$1.2M 1.4M shares
JACOBS LEVY EQUITY MANAGEMENT, INC Hedge Fund•Quant	+$387.1K +445.8K shares	$387.1K 445.8K shares
ACADIAN ASSET MANAGEMENT LLC Long Only Manager	+$301.4K +347.1K shares	$2.9M 3.4M shares
TWO SIGMA INVESTMENTS LLC Hedge Fund•Multi-Strategy	+$244.6K +281.7K shares	$344.6K 396.8K shares
T TANG CAPITAL MANAGEMENT LLC Institution	+$232.0K +267.1K shares	$2.5M 2.8M shares
UBS Group AG Institution	+$197.0K +227.0K shares	$1.6M 1.8M shares
GSA CAPITAL PARTNERS LLP Hedge Fund•Quant	+$151.8K +174.8K shares	$151.8K 174.8K shares
TWO SIGMA ADVISERS, LLC Hedge Fund•Multi-Strategy	+$150.3K +173.1K shares	$207.9K 239.4K shares
V Velan Capital Investment Management LP Institution	+$52.1K +60.0K shares	$2.7M 3.1M shares
S Shay Capital LLC Institution	+$45.3K +52.2K shares	$271.0K 312.1K shares

Biggest Sellers

Institution	Net Sold	Current Position
AQR CAPITAL MANAGEMENT LLC Hedge Fund•Multi-Strategy	−$571.6K −658.3K shares	$307.8K 354.4K shares
J JANE STREET GROUP, LLC Institution	−$491.8K −688.9K shares	Sold Off 0 shares
VANGUARD GROUP INC Institution	−$375.2K −432.3K shares	$3.2M 3.7M shares
DIMENSIONAL FUND ADVISORS LP Long Only Manager	−$374.2K −431.0K shares	$171.5K 197.5K shares
B BlackRock, Inc. Institution	−$364.0K −419.1K shares	$1.5M 1.7M shares
C CANTOR FITZGERALD, L. P. Institution	−$357.0K −500.0K shares	Sold Off 0 shares
GOLDMAN SACHS GROUP INC Institution	−$275.8K −317.6K shares	$76.5K 88.1K shares
L LPL Financial LLC Institution	−$197.9K −227.9K shares	$124.1K 142.9K shares
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	−$180.5K −207.9K shares	$3.9M 4.5M shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	−$123.0K −141.6K shares	$90.0K 103.6K shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited STRO in Q3 2025

New Positions: 3
New Value: $827.0
Exited Positions: 23
Exited Value: $1.2M

New Positions

Institution	Position Value
B Bare Financial Services, Inc Institution	$477.0 549.0 shares
J JONES FINANCIAL COMPANIES LLLP Institution	$222.0 250.0 shares
A Advisory Services Network, LLC RIA/Wealth	$128.0 147.0 shares

Exited Positions

Institution	Previous Position
J JANE STREET GROUP, LLC Institution	$491.8K 688.9K shares
C CANTOR FITZGERALD, L. P. Institution	$357.0K 500.0K shares
H HRT FINANCIAL LLC Institution	$61.0K 85.5K shares
Jain Global LLC Hedge Fund•Multi-Strategy	$60.3K 84.5K shares
Y Y-Intercept Ltd Institution	$47.5K 66.6K shares
H HSBC HOLDINGS PLC Institution	$18.2K 24.7K shares
R Resources Investment Advisors, Inc. Pension/Endowment	$17.2K 24.1K shares
WEALTH ENHANCEMENT ADVISORY SERVICES, LLC RIA/Wealth	$16.2K 21.2K shares
Hudson Bay Capital Management LP Hedge Fund•Multi-Strategy	$16.1K 22.6K shares
P PEAK6 LLC Institution	$15.2K 21.3K shares

Options Activity

Institutions with the largest Call and Put options positions in STRO as of Q3 2025

Call Positions: 1
Call Value: -
Put Positions: 0
Put Value: -

Call Positions

Institution	Position Value
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	- - contracts

Put Positions

Institution	Position Value
No put positions found

Most Committed Institutions

Institutions with STRO as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
V Velan Capital Investment Management LP Institution	-	2.54% $2.7M	3.68% 3.1M shares	Q4 2024 Held for 11 months	$106.5M
Merck & Co., Inc. Institution	Robert M. Davis CEO	1.09% $2.4M	3.21% 2.7M shares	Q4 2024 Held for 11 months	$217.8M
K Kynam Capital Management, LP Hedge Fund•Long/Short	Jared Joseph Keller COO	0.33% $4.4M	6.00% 5.1M shares	Q4 2022 Held for 2y 11m	$1.3B
Samsara BioCapital, LLC Venture Capital	Miran Nasruddin Ahmad CFO	0.25% $1.9M	2.59% 2.2M shares	Q4 2018 Held for 6y 11m	$765.9M
SUVRETTA CAPITAL MANAGEMENT, LLC Hedge Fund•Long/Short	Aaron Leonard Cowen CEO	0.17% $5.6M	7.65% 6.5M shares	Q1 2020 Held for 5y 8m	$3.3B
Eversept Partners, LLC Hedge Fund•Long/Short	Rishi Rasesh Shah President	0.15% $2.0M	2.70% 2.3M shares	Q2 2023 Held for 2y 5m	$1.3B
AJU IB Investment Co., Ltd. Real Assets	Benjamin Jason Weprin CEO	0.13% $153.1K	0.21% 175.0K shares	Q4 2024 Held for 11 months	$115.1M
Vestal Point Capital, LP Hedge Fund•Long/Short	Ryan Christopher Wilder CIO	0.11% $2.3M	3.07% 2.6M shares	Q4 2024 Held for 11 months	$2.0B
T TANG CAPITAL MANAGEMENT LLC Institution	-	0.10% $2.5M	3.34% 2.8M shares	Q1 2025 Held for 8 months	$2.5B
D DAFNA Capital Management LLC Hedge Fund•Event Driven	Nathan Fischel CEO	0.10% $379.6K	0.52% 437.1K shares	Q3 2018 Held for 7y 2m	$397.7M

Hedge Fund Spotlight

Discover hedge funds investing in STRO

Kynam Capital Management, LP

Hedge Fund • Long/Short

Portfolio ManagerJared Joseph Keller

Portfolio Value: $1.3B
Positions: 35
Last Reported: Q3 2025

Sector Allocation

Position in Sutro Biopharma

Market Value: $4.4M
Shares Held: 5.1M
Portfolio Weight: 0.33%
Owned Since: 2022-Q4

Top Holding	Sector	Market Value	Weight
1 Celldex Therapeutics CLDX	Biotechnology Healthcare	$157.8M	11.75%
2 Syndax Pharmaceuticals SNDX	Biotechnology Healthcare	$131.1M	9.76%
3 Vera Therapeutics VERA	Biotechnology Healthcare	$117.0M	8.71%