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STRO Insider Trading

Insider Ownership Percentage: 3.60%
Insider Buying (Last 12 Months): $89,597.50
Insider Selling (Last 12 Months): $0.00

Sutro Biopharma Insider Trading History Chart

This chart shows the insider buying and selling history at Sutro Biopharma by year and by quarter.

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Sutro Biopharma Share Price & Price History

Current Price: $19.49
Price Change: ▲ Price Increase of +1.09 (5.92%)
As of 02/24/2026 05:00 PM ET

This chart shows the closing price history over time for STRO up to the past year.

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Days: 30 | 90 | 365

Sutro Biopharma Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
10/15/2025Connie MatsuiDirectorBuy5,000$8.00$40,000.005,000View SEC Filing Icon  
10/15/2025David PaulingInsiderBuy1,250$8.00$10,000.007,173View SEC Filing Icon  
10/15/2025Gregory K ChowCFOBuy1,975$8.10$15,997.501,975View SEC Filing Icon  
10/15/2025Hans-Peter GerberInsiderBuy1,700$8.00$13,600.007,183View SEC Filing Icon  
10/15/2025Jane ChungCEOBuy1,250$8.00$10,000.0012,285View SEC Filing Icon  
1/29/2024Nicki VasquezInsiderSell1,218$50.00$60,900.001,280View SEC Filing Icon  
8/28/2023Brunilda ShtyllaInsiderSell1,542$47.10$72,628.20View SEC Filing Icon  
8/25/2023Brunilda ShtyllaInsiderSell1,161$45.90$53,289.901,292View SEC Filing Icon  
See Full Table

SEC Filings (Institutional Ownership Changes) for Sutro Biopharma (NASDAQ:STRO)

96.99% of Sutro Biopharma stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at STRO by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

Sutro Biopharma Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
2/19/2026Invesco Ltd.16,970$0.20M0.0%-87.4%0.199%Search for SEC Filing on Google Icon
2/18/2026State of Tennessee Department of Treasury7,400$86K0.0%N/A0.087%Search for SEC Filing on Google Icon
2/18/2026Vestal Point Capital LP243,000$2.81M0.1%-90.7%2.854%Search for SEC Filing on Google Icon
2/18/2026Tang Capital Management LLC139,617$1.62M0.1%-95.1%1.640%Search for SEC Filing on Google Icon
2/18/2026Opaleye Management Inc.190,671$2.21M0.3%N/A2.239%Search for SEC Filing on Google Icon
2/18/2026Millennium Management LLC418,196$4.84M0.0%-90.8%4.912%Search for SEC Filing on Google Icon
2/18/2026Eversept Partners LP193,571$2.24M0.1%-91.6%2.274%Search for SEC Filing on Google Icon
2/18/2026Balyasny Asset Management L.P.230,049$2.66M0.0%N/A2.703%Search for SEC Filing on Google Icon
2/17/2026ADAR1 Capital Management LLC67,077$0.78M0.1%N/A0.788%Search for SEC Filing on Google Icon
2/17/2026AQR Capital Management LLC18,034$0.21M0.0%-94.9%0.212%Search for SEC Filing on Google Icon
2/17/2026Adage Capital Partners GP L.L.C.200,000$2.31M0.0%-90.0%2.350%Search for SEC Filing on Google Icon
2/17/2026RBF Capital LLC15,272$0.18M0.0%-90.0%0.179%Search for SEC Filing on Google Icon
2/16/2026OMERS ADMINISTRATION Corp11,023$0.13M0.0%-88.4%0.130%Search for SEC Filing on Google Icon
2/16/2026Spruce Street Capital LP75,594$0.88M0.3%N/A0.888%Search for SEC Filing on Google Icon
2/13/2026Marshall Wace LLP85,615$0.99M0.0%-27.7%1.006%Search for SEC Filing on Google Icon
2/13/2026Affinity Asset Advisors LLC748,382$8.66M0.5%-0.6%8.794%Search for SEC Filing on Google Icon
2/13/2026Velan Capital Investment Management LP312,000$3.61M2.1%-90.0%3.666%Search for SEC Filing on Google Icon
2/13/2026State Street Corp34,266$0.40M0.0%-90.0%0.403%Search for SEC Filing on Google Icon
2/12/2026Jane Street Group LLC22,945$0.27M0.0%N/A0.270%Search for SEC Filing on Google Icon
2/12/2026Renaissance Technologies LLC122,865$1.42M0.0%-91.4%1.444%Search for SEC Filing on Google Icon
2/10/2026Goldman Sachs Group Inc.15,669$0.18M0.0%-82.2%0.184%Search for SEC Filing on Google Icon
2/10/2026AJU IB Investment Co. Ltd.17,500$0.20M1.1%-90.0%0.206%Search for SEC Filing on Google Icon
2/9/2026Geode Capital Management LLC83,979$0.97M0.0%-89.8%0.987%Search for SEC Filing on Google Icon
2/9/2026Fisher Asset Management LLC35,305$0.41M0.0%-90.0%0.415%Search for SEC Filing on Google Icon
2/6/2026GSA Capital Partners LLP89,067$1.03M0.1%-49.1%1.047%Search for SEC Filing on Google Icon
1/1/2026JPMorgan Chase & Co.76,158$66K0.0%-56.1%0.895%Search for SEC Filing on Google Icon
11/17/2025Jacobs Levy Equity Management Inc.445,750$0.39M0.0%N/A0.524%Search for SEC Filing on Google Icon
11/17/2025Velan Capital Investment Management LP3,120,000$2.71M2.5%+2.0%3.665%Search for SEC Filing on Google Icon
11/17/2025Susquehanna International Group LLP103,592$90K0.0%-57.8%0.122%Search for SEC Filing on Google Icon
11/17/2025Qube Research & Technologies Ltd65,226$57K0.0%-43.5%0.077%Search for SEC Filing on Google Icon
11/17/2025Millennium Management LLC4,524,350$3.93M0.0%-4.4%5.314%Search for SEC Filing on Google Icon
11/17/2025Bank of America Corp DE119,434$0.10M0.0%+51.3%0.140%Search for SEC Filing on Google Icon
11/14/2025Shay Capital LLC312,051$0.27M0.0%+20.1%0.367%Search for SEC Filing on Google Icon
11/14/2025Two Sigma Investments LP396,785$0.35M0.0%+244.8%0.466%Search for SEC Filing on Google Icon
11/14/2025Bridgeway Capital Management LLC42,900$37K0.0%+232.6%0.050%Search for SEC Filing on Google Icon
11/13/2025UBS Group AG1,845,839$1.60M0.0%+14.0%2.168%Search for SEC Filing on Google Icon
11/12/2025Dimensional Fund Advisors LP197,516$0.17M0.0%-68.6%0.232%Search for SEC Filing on Google Icon
11/7/2025GSA Capital Partners LLP174,843$0.15M0.0%N/A0.206%Search for SEC Filing on Google Icon
11/7/2025Vanguard Group Inc.3,682,986$3.20M0.0%-10.5%4.345%Search for SEC Filing on Google Icon
11/7/2025JPMorgan Chase & Co.76,158$66K0.0%-56.1%0.090%Search for SEC Filing on Google Icon
11/5/2025Savant Capital LLC37,713$33K0.0%-28.1%0.044%Search for SEC Filing on Google Icon
8/15/2025Shay Capital LLC259,889$0.19M0.0%+26.4%0.307%Search for SEC Filing on Google Icon
8/15/2025Bank of America Corp DE78,946$56K0.0%-27.6%0.093%Search for SEC Filing on Google Icon
8/14/2025Jane Street Group LLC688,850$0.49M0.0%N/A0.813%Search for SEC Filing on Google Icon
8/14/2025RBF Capital LLC160,000$0.11M0.0%N/A0.189%Search for SEC Filing on Google Icon
8/14/2025Velan Capital Investment Management LP3,060,000$2.19M2.2%+197.1%3.610%Search for SEC Filing on Google Icon
8/14/2025Qube Research & Technologies Ltd115,401$82K0.0%N/A0.136%Search for SEC Filing on Google Icon
8/14/2025Cerity Partners LLC105,437$75K0.0%+169.9%0.124%Search for SEC Filing on Google Icon
8/13/2025Marshall Wace LLP234,431$0.17M0.0%N/A0.277%Search for SEC Filing on Google Icon
8/12/2025Prudential Financial Inc.35,500$25K0.0%-94.1%0.042%Search for SEC Filing on Google Icon
8/12/2025JPMorgan Chase & Co.173,477$0.12M0.0%-42.4%0.205%Search for SEC Filing on Google Icon
8/12/2025Catalyst Funds Management Pty Ltd38,500$27K0.0%N/A0.045%Search for SEC Filing on Google Icon
8/8/2025Geode Capital Management LLC816,915$0.58M0.0%-56.8%0.967%Search for SEC Filing on Google Icon
8/7/2025Acadian Asset Management LLC3,042,238$2.17M0.0%-2.9%3.602%Search for SEC Filing on Google Icon
8/6/2025Savant Capital LLC52,416$37K0.0%N/A0.062%Search for SEC Filing on Google Icon
8/1/2025Y Intercept Hong Kong Ltd66,591$48K0.0%N/A0.079%Search for SEC Filing on Google Icon
7/25/2025CWM LLC56,657$40K0.0%+73.2%0.067%Search for SEC Filing on Google Icon
7/25/2025Vanguard Personalized Indexing Management LLC60,617$43K0.0%+174.8%0.072%Search for SEC Filing on Google Icon
5/28/2025Strs Ohio152,800$99K0.0%N/A0.181%Search for SEC Filing on Google Icon
5/21/2025Acadian Asset Management LLC3,134,586$2.04M0.0%+78.9%3.711%Search for SEC Filing on Google Icon
5/16/2025AQR Capital Management LLC1,320,917$0.86M0.0%+1,052.8%1.566%Search for SEC Filing on Google Icon
5/15/2025Vestal Point Capital LP2,600,000$1.69M0.1%+1.2%3.082%Search for SEC Filing on Google Icon
5/15/2025RA Capital Management L.P.4,434,637$2.89M0.0%N/A5.257%Search for SEC Filing on Google Icon
5/15/2025Velan Capital Investment Management LP1,030,000$0.67M0.7%+3,333.3%1.221%Search for SEC Filing on Google Icon
5/15/2025State of Wyoming94,932$62K0.0%N/A0.113%Search for SEC Filing on Google Icon
5/14/2025Affinity Asset Advisors LLC752,722$0.49M0.0%N/A0.892%Search for SEC Filing on Google Icon
5/12/2025Nuveen LLC290,897$0.19M0.0%N/A0.345%Search for SEC Filing on Google Icon
5/12/2025Invesco Ltd.92,139$60K0.0%+137.8%0.109%Search for SEC Filing on Google Icon
5/9/2025Charles Schwab Investment Management Inc.199,901$0.13M0.0%-20.7%0.237%Search for SEC Filing on Google Icon
4/30/2025Cerity Partners LLC39,065$25K0.0%N/A0.046%Search for SEC Filing on Google Icon
4/28/2025Vontobel Holding Ltd.50,000$33K0.0%+100.0%0.059%Search for SEC Filing on Google Icon
4/17/2025Exchange Traded Concepts LLC136,623$89K0.0%+201.9%0.166%Search for SEC Filing on Google Icon
2/17/2025Velan Capital Investment Management LP30,000$55K0.0%N/A0.036%Search for SEC Filing on Google Icon
2/17/2025Vestal Point Capital LP2,570,000$4.73M0.3%N/A3.117%Search for SEC Filing on Google Icon
2/17/2025Two Sigma Investments LP316,292$0.58M0.0%-35.7%0.384%Search for SEC Filing on Google Icon
2/17/2025Two Sigma Advisers LP547,800$1.01M0.0%-7.3%0.664%Search for SEC Filing on Google Icon
2/17/2025Suvretta Capital Management LLC7,462,495$13.73M0.5%+3.8%9.050%Search for SEC Filing on Google Icon
2/17/2025Shay Capital LLC203,601$0.38M0.1%N/A0.247%Search for SEC Filing on Google Icon
2/17/2025Sherbrooke Park Advisers LLC33,640$62K0.0%-73.9%0.041%Search for SEC Filing on Google Icon
2/17/2025Point72 Asset Management L.P.2,197,538$4.04M0.0%-26.7%2.665%Search for SEC Filing on Google Icon
2/17/2025ProShare Advisors LLC26,961$50K0.0%+74.3%0.033%Search for SEC Filing on Google Icon
2/17/2025MPM Bioimpact LLC2,160,062$3.98M0.6%-23.7%2.620%Search for SEC Filing on Google Icon
2/17/2025Parkman Healthcare Partners LLC1,727,925$3.18M0.4%+0.7%2.095%Search for SEC Filing on Google Icon
2/17/2025Man Group plc132,406$0.24M0.0%-19.2%0.161%Search for SEC Filing on Google Icon
2/17/2025Nuveen Asset Management LLC1,323,777$2.44M0.0%+10.3%1.605%Search for SEC Filing on Google Icon
2/17/2025OMERS ADMINISTRATION Corp95,150$0.18M0.0%-50.0%0.115%Search for SEC Filing on Google Icon
2/17/2025OCONNOR A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS LLC300,621$0.55M0.0%-11.1%0.365%Search for SEC Filing on Google Icon
2/17/2025Millennium Management LLC405,618$0.75M0.0%-80.0%0.492%Search for SEC Filing on Google Icon
2/17/2025Jacobs Levy Equity Management Inc.859,373$1.58M0.0%+4.6%1.042%Search for SEC Filing on Google Icon
2/17/2025D. E. Shaw & Co. Inc.157,683$0.29M0.0%-5.9%0.191%Search for SEC Filing on Google Icon
2/17/2025DAFNA Capital Management LLC437,079$0.80M0.2%+32.6%0.530%Search for SEC Filing on Google Icon
2/17/2025Bridgeway Capital Management LLC189,700$0.35M0.0%+91.2%0.230%Search for SEC Filing on Google Icon
2/17/2025Bank of America Corp DE106,258$0.20M0.0%-17.7%0.129%Search for SEC Filing on Google Icon
2/17/2025BNP Paribas Financial Markets150,758$0.28M0.0%+82.7%0.183%Search for SEC Filing on Google Icon
2/14/2025Schonfeld Strategic Advisors LLC196,800$0.36M0.0%-30.6%0.239%Search for SEC Filing on Google Icon
2/14/2025Northern Trust Corp636,920$1.17M0.0%+2.3%0.772%Search for SEC Filing on Google Icon
2/14/2025Susquehanna Fundamental Investments LLC87,810$0.16M0.0%N/A0.106%Search for SEC Filing on Google Icon
2/14/2025Adage Capital Partners GP L.L.C.2,000,000$3.68M0.0%-11.1%2.425%Search for SEC Filing on Google Icon
2/14/2025Eversept Partners LP694,408$1.28M0.1%-62.3%0.842%Search for SEC Filing on Google Icon
2/14/2025Hsbc Holdings PLC63,554$0.12M0.0%-22.2%0.077%Search for SEC Filing on Google Icon
Data available starting January 2016

See Full Table
Sutro Biopharma logo
Sutro Biopharma, Inc. operates as a clinical-stage oncology company. The company develops site-specific and novel-format antibody drug conjugates (ADCs) that enables its proprietary integrated cell-free protein synthesis platform, XpressCF and XpressCF+. Its product candidates include STRO-002, an ADC directed against folate receptor-alpha, which is in Phase II/III clinical trials for patients with ovarian and endometrial cancers; VAX-24 and Vax-31 pneumococcal conjugate vaccine candidates that is in Phase II/III clinical trials for the treatment of invasive pneumococcal disease; and MK-1484, a distinct cytokine derivative molecule that is in Phase I clinical study for the treatment of cancer. The company's pre-clinical product candidates include STRO-003, an ADC directed against an anti-receptor tyrosine kinase-like orphan receptor 1 (ROR1) for the treatment of solid tumors and hematological cancers; and STRO-004, a tissue factor (TF) targeting ADC for the treatment of TF-expressing solid tumors, including cervical, lung, and breast cancer. Sutro Biopharma, Inc. has collaboration and license agreements with Merck Sharp & Dohme Corporation to develop research programs focusing on cytokine derivatives for cancer and autoimmune disorders; Vaxcyte to discover and develop vaccine candidates for the treatment or prophylaxis of infectious diseases; Tasly Biopharmaceuticals Co., Ltd. to develop and commercialize STRO-002 in Greater China; EMD Serono to develop ADCs for multiple cancer targets; and Astellas Pharma Inc. to develop immunostimulatory ADC. The company was formerly known as Fundamental Applied Biology, Inc. Sutro Biopharma, Inc. was incorporated in 2003 and is headquartered in South San Francisco, California.
Read More on Sutro Biopharma

Today's Range

Now: $19.49
Low: $18.22
High: $19.97

50 Day Range

MA: $13.60
Low: $8.93
High: $19.56

52 Week Range

Now: $19.49
Low: $5.23
High: $19.97

Volume

93,950 shs

Average Volume

133,113 shs

Market Capitalization

$165.94 million

P/E Ratio

N/A

Dividend Yield

N/A

Beta

1.54

Who are the company insiders with the largest holdings of Sutro Biopharma?

Sutro Biopharma's top insider shareholders include:
  1. Jane Chung (CEO)
  2. Hans-Peter Gerber (Insider)
  3. David Pauling (Insider)
  4. Connie Matsui (Director)
  5. Gregory K Chow (CFO)
Learn More about top insider investors at Sutro Biopharma.

Who are the major institutional investors of Sutro Biopharma?

Sutro Biopharma's top institutional shareholders include:
  1. Affinity Asset Advisors LLC — 8.79%
  2. Millennium Management LLC — 4.91%
  3. Velan Capital Investment Management LP — 3.67%
  4. Vestal Point Capital LP — 2.85%
  5. Balyasny Asset Management L.P. — 2.70%
  6. Adage Capital Partners GP L.L.C. — 2.35%
Learn More about top institutional investors of Sutro Biopharma stock.

Which institutional investors are selling Sutro Biopharma stock?

During the previous quarter, STRO stock was sold by these institutional investors:
  1. Millennium Management LLC
  2. Velan Capital Investment Management LP
  3. Tang Capital Management LLC
  4. Vestal Point Capital LP
  5. Eversept Partners LP
  6. Adage Capital Partners GP L.L.C.
  7. Renaissance Technologies LLC
  8. Geode Capital Management LLC

Which institutional investors are buying Sutro Biopharma stock?

Within the last quarter, STRO stock was acquired by institutional investors including:
  1. Balyasny Asset Management L.P.
  2. Opaleye Management Inc.
  3. Spruce Street Capital LP
  4. ADAR1 Capital Management LLC
  5. Jane Street Group LLC
  6. State of Tennessee Department of Treasury
In the previous year, these company insiders have bought Sutro Biopharma stock:
  1. Jane Chung (CEO)
  2. Hans-Peter Gerber (Insider)
  3. David Pauling (Insider)
  4. Connie Matsui (Director)
  5. Gregory K Chow (CFO)
Learn More investors buying Sutro Biopharma stock.