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Reported ownership activity
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Reported sales exceed purchases by $41.4KOption exercises, awards, and grants are separated from open-market direction.Timing
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Company profile
Sutro Biopharma, Inc. operates as an 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 site-specific conjugation platform, XpressCF+. Its lead product candidate includes STRO-004, a tissue factor (TF) targeting ADC for the treatment of TF-expressing solid tumors, including non-small cell lung cancer, head and neck squamous cell carcinoma, cervical cancer, colorectal cancer, pancreatic ductal adenocarcinoma, endometrial cancer, and bladder cancer. The company also develops VAX-24 and Vax-31 pneumococcal conjugate vaccine candidates that is in Phase II/III clinical trials for the treatment of invasive pneumococcal disease in adults and adults and infants; and STRO-003, an ADC directed against an anti-receptor tyrosine kinase-like orphan receptor 1 (ROR1) for the treatment of solid tumors, such as triple negative breast cancer, non-small cell lung cancer, and ovarian cancer, as well as hematological cancers. Sutro Biopharma, Inc. has collaboration and license agreements with 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; Ipsen to develop and commercialize STRO-003, an ADC targeting ROR1; 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.
Company profile supplied by Yahoo Finance. Catalyst dates can change and should be confirmed against the linked primary source.
Page updated Aug 21, 2026 · Yahoo quotes cached for one minute; reference data may be used when a live field is unavailable.
| Insider trading | Relationship | Date | Transaction | Cost | Shares | Value | Shares total | SEC Form 4 |
|---|---|---|---|---|---|---|---|---|
| Chow Gregory K. | CFO | Jun 02 '26 | Option Exercise | $0.00 | 2,500 | $0 | 4,725 | Jun 02 04:16 PM |
| Pauling David | Chief Admin. Ofcr. & GC | Mar 04 '26 | Option Exercise | $0.00 | 675 | $0 | 10,025 | Mar 06 04:25 PM |
| Chung Jane | Chief Executive Officer | Mar 04 '26 | Option Exercise | $0.00 | 788 | $0 | 21,567 | Mar 06 04:21 PM |
Transactions may include sales, purchases, grants, and option exercises. Directional charts count only purchases and sales; follow the Form 4 link to verify the original SEC filing.