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Sutro Biopharma, Inc.

STRO
Exchange
Nasdaq
Industry
Biological Products, (No Diagnostic Substances)
SEC CIK
0001382101

No open-market purchases or sales by Sutro Biopharma, Inc. insiders were filed in the last 90 days; 100 institutions reported holding it in 13F filings for Q2 2026, worth $545.7M in total; no superinvestor holds it.

13F holders, Q4 2025

Institutional positions in Sutro Biopharma, Inc. as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
65
−20 vs. Q3 2025
Shares held
5.60M
+262.7K (+4.9%) vs. Q3 2025Converted for a 1-for-10 split
Total value
$64.8M
+$18.5M (+39.9%) vs. Q3 2025
New holders
13
15 more added
Sold out
33
25 more reduced

3 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q3 2025: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting STRO on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ4 2025: 65 institutions
Q1 2021: 138 institutionsQ2 2021: 124 institutionsQ3 2021: 120 institutionsQ4 2021: 117 institutionsQ1 2022: 114 institutionsQ2 2022: 115 institutionsQ3 2022: 113 institutionsQ4 2022: 119 institutionsQ1 2023: 116 institutionsQ2 2023: 120 institutionsQ3 2023: 109 institutionsQ4 2023: 114 institutionsQ1 2024: 117 institutionsQ2 2024: 119 institutionsQ3 2024: 130 institutionsQ4 2024: 123 institutionsQ1 2025: 113 institutionsQ2 2025: 101 institutionsQ3 2025: 88 institutionsQ4 2025: 65 institutionsQ1 2026: 78 institutionsQ2 2026: 100 institutions
Value heldQ4 2025: $64.8M
Q1 2021: $1.01BQ2 2021: $766.7MQ3 2021: $752.5MQ4 2021: $593.2MQ1 2022: $342.2MQ2 2022: $240.9MQ3 2022: $279.6MQ4 2022: $403.7MQ1 2023: $247.5MQ2 2023: $251.6MQ3 2023: $194.3MQ4 2023: $238.7MQ1 2024: $301.7MQ2 2024: $185.1MQ3 2024: $216.4MQ4 2024: $117.6MQ1 2025: $40.0MQ2 2025: $39.6MQ3 2025: $46.4MQ4 2025: $64.8MQ1 2026: $358.3MQ2 2026: $545.7M
Institutions holding STRO and their total value by quarter
QuarterHoldersValue
Q2 2026100$545.7M
Q1 202678$358.3M
Q4 202565$64.8M
Q3 202588$46.4M
Q2 2025101$39.6M
Q1 2025113$40.0M
Q4 2024123$117.6M
Q3 2024130$216.4M
Q2 2024119$185.1M
Q1 2024117$301.7M
Q4 2023114$238.7M
Q3 2023109$194.3M
Q2 2023120$251.6M
Q1 2023116$247.5M
Q4 2022119$403.7M
Q3 2022113$279.6M
Q2 2022115$240.9M
Q1 2022114$342.2M
Q4 2021117$593.2M
Q3 2021120$752.5M
Q2 2021124$766.7M
Q1 2021138$1.01B

Institutions, Q4 2025

Shares, value and share of portfolio for each institution holding Sutro Biopharma, Inc.; share changes are against Q3 2025.

Institutions holding STRO in Q4 2025
InstitutionSharesValue% of portfolioChange in sharesAction
Affinity Asset Advisors, LLC748,382$8.66M0.62%+673,110+894.2%AddedConverted for a 1-for-10 split
Kynam Capital Management, LP479,590$5.55M0.36%−29,220−5.7%ReducedConverted for a 1-for-10 split
Millennium Management LLC418,196$4.84M0.00%−34,239−7.6%ReducedConverted for a 1-for-10 split
Vanguard Group Inc375,786$4.35M0.00%+7,487+2.0%AddedConverted for a 1-for-10 split
Acadian Asset Management LLC337,953$3.91M0.01%00.0%UnchangedConverted for a 1-for-10 split
Velan Capital Investment Management LP312,000$3.61M2.10%00.0%UnchangedConverted for a 1-for-10 split
Merck & Co., Inc.272,351$3.15M1.14%00.0%UnchangedConverted for a 1-for-10 split
Vestal Point Capital, LP243,000$2.81M0.10%−17,000−6.5%ReducedConverted for a 1-for-10 split
Balyasny Asset Management LLC230,049$2.66M0.00%+230,049New
Samsara BioCapital, LLC204,503$2.37M0.24%−15,178−6.9%ReducedConverted for a 1-for-10 split
Adage Capital Partners GP, L.L.C.200,000$2.31M0.00%00.0%UnchangedConverted for a 1-for-10 split
Eversept Partners, LP193,571$2.24M0.13%−35,560−15.5%ReducedConverted for a 1-for-10 split
Opaleye Management Inc.190,671$2.21M0.29%+190,671New
Point72 Asset Management, L.P.179,088$2.07M0.00%+179,088New
Tang Capital Management LLC139,617$1.62M0.08%−143,255−50.6%ReducedConverted for a 1-for-10 split
Renaissance Technologies LLC122,865$1.42M0.00%−19,615−13.8%ReducedConverted for a 1-for-10 split
BlackRock, Inc.117,437$1.36M0.00%−51,351−30.4%ReducedConverted for a 1-for-10 split
Gsa Capital Partners LLP89,067$1.03M0.09%+71,583+409.4%AddedConverted for a 1-for-10 split
Marshall Wace, LLP85,615$990.6K0.00%+73,771+622.8%AddedConverted for a 1-for-10 split
Geode Capital Management, LLC83,979$972.0K0.00%+1,884+2.3%AddedConverted for a 1-for-10 split
Spruce Street Capital LP75,594$874.6K0.29%+75,594New
Acuta Capital Partners, LLC67,451$780.4K0.53%+67,451New
ADAR1 Capital Management, LLC67,077$776.1K0.06%+67,077New
Two Sigma Investments, LP46,492$537.9K0.00%+6,814+17.2%AddedConverted for a 1-for-10 split
Fisher Asset Management, LLC35,305$408.5K0.00%00.0%UnchangedConverted for a 1-for-10 split
State Street Corp34,266$396.5K0.00%00.0%UnchangedConverted for a 1-for-10 split
Citadel Advisors LLC32,085$371.2K0.00%+32,085New
Shay Capital LLC24,255$280.6K0.05%−6,950−22.3%ReducedConverted for a 1-for-10 split
Jane Street Group, LLC22,945$265.5K0.00%+22,945New
AQR Capital Management LLC18,034$208.7K0.00%−17,411−49.1%ReducedConverted for a 1-for-10 split
Two Sigma Advisers, LP17,580$203.4K0.00%−6,360−26.6%ReducedConverted for a 1-for-10 split
AJU IB Investment Co., Ltd.17,500$202.5K1.09%00.0%UnchangedConverted for a 1-for-10 split
Invesco Ltd.16,970$196.3K0.00%+3,478+25.8%AddedConverted for a 1-for-10 split
Morgan Stanley15,922$184.2K0.00%−8,267−34.2%ReducedConverted for a 1-for-10 split
Goldman Sachs Group Inc15,669$181.3K0.00%+6,858+77.8%AddedConverted for a 1-for-10 split
RBF Capital, LLC15,272$176.7K0.01%00.0%UnchangedConverted for a 1-for-10 split
Northern Trust Corp14,379$166.4K0.00%+2,168+17.7%AddedConverted for a 1-for-10 split
Omers Administration Corp11,023$127.5K0.00%+1,508+15.8%AddedConverted for a 1-for-10 split
State of Tennessee, Treasury Department7,400$110.6K0.00%+7,400New
UBS Group AG7,870$91.1K0.00%−176,714−95.7%ReducedConverted for a 1-for-10 split
Bank of America Corp4,212$48.7K0.00%−7,731−64.7%ReducedConverted for a 1-for-10 split
CWM, LLC1,499$17.0K0.00%−1,025−40.6%ReducedConverted for a 1-for-10 split
Advisor Group Holdings, Inc.1,338$15.5K0.00%−777−36.7%ReducedConverted for a 1-for-10 split
FMR LLC1,108$12.8K0.00%−78−6.6%ReducedConverted for a 1-for-10 split
Citigroup Inc1,043$12.1K0.00%−6,495−86.2%ReducedConverted for a 1-for-10 split
FNY Investment Advisers, LLC1,000$11.0K0.00%00.0%UnchangedConverted for a 1-for-10 split
JPMorgan Chase & Co741$8.57K0.00%−6,875−90.3%ReducedConverted for a 1-for-10 split
UMA Financial Services, Inc.182$2.11K0.00%+52+39.6%AddedConverted for a 1-for-10 split
BNP Paribas Arbitrage, SA111$1.28K0.00%−63−36.2%ReducedConverted for a 1-for-10 split
Wells Fargo & Company100$1.16K0.00%+100New
The PNC Financial Services Group, Inc.62$7170.00%+1+1.0%AddedConverted for a 1-for-10 split
Fortitude Family Office, LLC56$6480.00%+56New
Bogart Wealth, LLC50$5790.00%00.0%UnchangedConverted for a 1-for-10 split
Parallel Advisors, LLC47$5440.00%+1+1.1%AddedConverted for a 1-for-10 split
Nisa Investment Advisors, LLC44$5090.00%00.0%UnchangedConverted for a 1-for-10 split
EverSource Wealth Advisors, LLC31$3590.00%−14−31.7%ReducedConverted for a 1-for-10 split
HighMark Wealth Management LLC23$2660.00%+1+2.2%AddedConverted for a 1-for-10 split
Berthel, Fisher & Company Financial Services, Inc.6$690.00%+6New
BFC Planning, Inc.6$690.00%+6New
Essential Partners LLC4$460.00%−17−81.1%ReducedConverted for a 1-for-10 split
SRS Capital Advisors, Inc.3$350.00%−381−99.2%ReducedConverted for a 1-for-10 split
Comerica Bank3$350.00%−2−38.8%ReducedConverted for a 1-for-10 split
Group One Trading, L.P.2$230.00%00.0%UnchangedConverted for a 1-for-10 split
Royal Bank of Canada11$00.00%−25,888−100.0%ReducedConverted for a 1-for-10 split
Avion Wealth72$00.00%+0+0.6%AddedConverted for a 1-for-10 split
Suvretta Capital Management, LLC0$00.00%−648,832−100.0%Sold outConverted for a 1-for-10 split
Jacobs Levy Equity Management, Inc0$00.00%−44,575−100.0%Sold outConverted for a 1-for-10 split
DAFNA Capital Management LLC0$00.00%−43,708−100.0%Sold outConverted for a 1-for-10 split
Dimensional Fund Advisors LP0$00.00%−19,752−100.0%Sold outConverted for a 1-for-10 split
LPL Financial LLC0$00.00%−14,288−100.0%Sold outConverted for a 1-for-10 split
Susquehanna International Group, LLP0$00.00%−10,359−100.0%Sold outConverted for a 1-for-10 split
Standard Life Aberdeen plc0$00.00%−6,939−100.0%Sold outConverted for a 1-for-10 split
Cerity Partners LLC0$00.00%−6,806−100.0%Sold outConverted for a 1-for-10 split
Qube Research & Technologies Ltd0$00.00%−6,523−100.0%Sold outConverted for a 1-for-10 split
Catalyst Funds Management Pty Ltd0$00.00%−6,378−100.0%Sold outConverted for a 1-for-10 split
JustInvest LLC0$00.00%−6,018−100.0%Sold outConverted for a 1-for-10 split
Ieq Capital, LLC0$00.00%−5,975−100.0%Sold outConverted for a 1-for-10 split
Vontobel Holding Ltd.0$00.00%−5,000−100.0%Sold outConverted for a 1-for-10 split
Bridgeway Capital Management, LLC0$00.00%−4,290−100.0%Sold outConverted for a 1-for-10 split
Prudential Financial Inc0$00.00%−3,550−100.0%Sold outConverted for a 1-for-10 split
Bluefin Capital Management, LLC0$00.00%−3,493−100.0%Sold outConverted for a 1-for-10 split
Tower Research Capital LLC (TRC)0$00.00%−2,402−100.0%Sold outConverted for a 1-for-10 split
XTX Topco Ltd0$00.00%−1,913−100.0%Sold outConverted for a 1-for-10 split
China Universal Asset Management Co., Ltd.0$00.00%−1,486−100.0%Sold outConverted for a 1-for-10 split
Ground Swell Capital, LLC0$00.00%−1,435−100.0%Sold outConverted for a 1-for-10 split
Quantinno Capital Management LP0$00.00%−1,114−100.0%Sold outConverted for a 1-for-10 split
Revolve Wealth Partners, LLC0$00.00%−1,100−100.0%Sold outConverted for a 1-for-10 split
Mirae Asset Global Investments Co., Ltd.0$00.00%−328−100.0%Sold outConverted for a 1-for-10 split
Barclays PLC0$00.00%−277−100.0%Sold outConverted for a 1-for-10 split
Rockefeller Capital Management L.P.0$00.00%−237−100.0%Sold outConverted for a 1-for-10 split
GF Fund Management Co. Ltd.0$00.00%−192−100.0%Sold outConverted for a 1-for-10 split
Rise Advisors, LLC0$00.00%−77−100.0%Sold outConverted for a 1-for-10 split
Bare Financial Services, Inc0$00.00%−55−100.0%Sold outConverted for a 1-for-10 split
Jones Financial Companies LLLP0$00.00%−25−100.0%Sold outConverted for a 1-for-10 split
Advisory Services Network, LLC0$00.00%−15−100.0%Sold outConverted for a 1-for-10 split
True Wealth Design, LLC0$00.00%−5−100.0%Sold outConverted for a 1-for-10 split
IFP Advisors, Inc0$00.00%−2−100.0%Sold outConverted for a 1-for-10 split
SBI Securities Co., Ltd.0$00.00%−0−100.0%Sold outConverted for a 1-for-10 split
Point72 Asia (Singapore) Pte. Ltd.––––Not filed
Accredited Wealth Management, LLC––––Not filed