Institutional shares held 60.5 Million
95.8K calls
38.5K puts
Total value of holdings $46.6M
$73K calls
$29K puts
Market Cap $41.7M
52,161,500 Shares Out.
Institutional ownership 115.97%
# of Institutions 118


Latest Institutional Activity in STRO

Top Purchases

Q2 2025
Pallas Capital Advisors LLC Shares Held: 11.1K ($8.89K)
Q2 2025
Wealth Enhancement Advisory Services, LLC Shares Held: 21.2K ($17K)
Q2 2025
Rise Advisors, LLC Shares Held: 769 ($615)
Q2 2025
Mirae Asset Global Investments Co., Ltd. Shares Held: 3.26K ($2.61K)
Q1 2025
Ra Capital Management, L.P. Shares Held: 4.43M ($3.55M)

Top Sells

Q1 2025
Citadel Advisors LLC Shares Held: 141K ($113K)
Q1 2025
Morgan Stanley Shares Held: 196K ($157K)
Q1 2025
Dimensional Fund Advisors LP Shares Held: 817K ($654K)
Q1 2025
Two Sigma Advisers, LP Shares Held: 241K ($193K)
Q1 2025
Ubs Oconnor LLC Shares Held: 28.3K ($22.6K)

About STRO

Sutro Biopharma, Inc. operates as clinical stage drug discovery, development, and manufacturing company. It focuses on creating protein therapeutics for cancer and autoimmune disorders through integrated cell-free protein synthesis and site-specific conjugation platform, XpressCF+.The company's product candidates include STRO-001, an antibody-drug conjugate (ADC) directed against the cancer target CD74 for patients with multiple myeloma and non-Hodgkin lymphoma that is in Phase 1 clinical trials; and STRO-002, an ADC directed against folate receptor-alpha for patients with ovarian and endometrial cancers, which is in Phase 1 clinical trials. It has collaboration and license agreements with Merck Collaboration to develop research programs focusing on cytokine derivatives for cancer and autoimmune disorders; and Celgene Corporation to discover and develop bispecific antibodies and/or ADCs focused on the field of immuno-oncology. 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.


Insider Transactions at STRO

Insider Transaction List

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Date Insider Transaction Ownership Type Shares Traded Value / Price
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Last 12 Months Summary

Buy / Acquisition
564K Shares
From 7 Insiders
Exercise of conversion of derivative security 564K shares
Sell / Disposition
209K Shares
From 7 Insiders
Payment of exercise price or tax liability 209K shares

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