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Livermore
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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.

Q2 2026 vs. Q1 2026

How the institutions holding Sutro Biopharma, Inc. changed between Q1 2026 and Q2 2026.

All holders in Q2 2026All holders in Q1 2026

13F holders of STRO: Q1 2026 compared with Q2 2026
MeasureQ1 2026Of which not filed for Q2 2026Q2 2026Change
Holders781100+23
Shares14.4M98316.5M+2.10M (+14.6%)
Value$358.3M$24.5K$545.7M+$187.4M (+52.3%)

1 institution that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (40)

Institutions that held Sutro Biopharma, Inc. at the end of Q2 2026 but not at the end of Q1 2026.

Institutions new to STRO in Q2 2026
InstitutionSharesValue% of portfolio
Ameriprise Financial Inc244,669$8.12M0.00%
Vanguard Portfolio Management LLC197,562$6.56M0.00%
Nuveen, LLC167,997$5.58M0.00%
JPMorgan Chase & Co159,627$5.32M0.00%
Seven Fleet Capital Management LP159,118$3.79M0.63%
Qube Research & Technologies Ltd106,610$3.54M0.00%
Mackenzie Financial Corp94,767$3.15M0.00%
Y-Intercept (Hong Kong) Ltd55,879$1.86M0.04%
Squarepoint Ops LLC55,539$1.84M0.00%
Bank of New York Mellon Corp41,369$1.37M0.00%
Elmind Capital, LP32,037$1.06M0.27%
D. E. Shaw & Co., Inc.30,128$1.00M0.00%
Rhumbline Advisers20,628$684.8K0.00%
SEI Investments Co16,387$544.0K0.00%
EAM Investors, LLC16,232$538.9K0.05%
Deutsche Bank AG15,563$516.7K0.00%
Price T Rowe Associates Inc13,597$452.0K0.00%
Wells Fargo & Company13,544$449.7K0.00%
Wellington Management Group LLP10,800$358.6K0.00%
MetLife Investment Management9,401$312.1K0.00%
Walleye Capital LLC9,306$309.0K0.00%
Integrated Quantitative Investments LLC8,939$296.8K0.05%
Lighthouse Investment Partners, LLC8,368$277.8K0.01%
Mirae Asset Global ETFs Holdings Ltd.7,313$242.8K0.00%
Alliancebernstein L.P.7,300$242.4K0.00%
State Board of Administration of Florida Retirement System7,001$232.4K0.00%
Verdad Advisers, LP6,400$212.5K0.20%
HSBC Holdings PLC6,234$205.7K0.00%
New York State Common Retirement Fund5,600$185.9K0.00%
Police & Firemen's Retirement System of New Jersey4,704$156.2K0.00%
Legal & General Group Plc3,462$114.9K0.00%
State of Wyoming1,618$53.7K0.01%
Ameritas Investment Partners, Inc.1,448$48.1K0.00%
Russell Investments Group, Ltd.1,275$42.3K0.00%
Tower Research Capital LLC (TRC)866$28.8K0.00%
Sterling Capital Management LLC281$9.33K0.00%
California State Teachers Retirement System220$7.30K0.00%
Quantbot Technologies LP201$6.67K0.00%
Steward Partners Investment Advisory, LLC2$660.00%
Optiver Holding B.V.2$660.00%

Sold out (17)

Institutions that held Sutro Biopharma, Inc. at the end of Q1 2026 and filed for Q2 2026 without it.

Institutions that sold out of STRO in Q2 2026
InstitutionShares, Q1 2026Value, Q1 2026
Ra Capital Management, L.P.715,307$17.8M
Adage Capital Partners GP, L.L.C.200,000$4.98M
Opaleye Management Inc.190,671$4.75M
Eversept Partners, LP73,161$1.82M
Burkehill Global Management, LP71,530$1.78M
Jane Street Group, LLC27,760$691.5K
StemPoint Capital LP23,295$580.3K
Brevan Howard Capital Management LP18,791$468.1K
AJU IB Investment Co., Ltd.17,500$435.9K
Hudson Bay Capital Management LP14,768$367.9K
Jump Financial, LLC12,385$308.5K
Omers Administration Corp8,700$216.7K
AQR Capital Management LLC8,605$214.4K
State of Tennessee, Treasury Department7,400$184.3K
Simplex Trading, LLC62$1.54K
EverSource Wealth Advisors, LLC19$473
Advisory Services Network, LLC15$374

Not filed for Q2 2026 yet (1)

Institutions that held Sutro Biopharma, Inc. at the end of Q1 2026 and haven't filed a 13F for Q2 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding STRO in Q1 2026 that haven't filed for Q2 2026
InstitutionShares, Q1 2026Value, Q1 2026
CWM, LLC983$24.5K