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STRO SCHEDULE 13G: SEC filing

Coastlands Capital LP and affiliated entities

Filed with the SEC on · accession 0001104659-26-124373

STRO filed a SCHEDULE 13G (schedule 13g) with the SEC on Nov 9, 2026. Coastlands Capital LP and affiliated entities filed a Schedule 13G disclosing beneficial ownership of 852,669 shares, or 5.14%, of Sutro Biopharma's common stock.

Summary of the filing

Coastlands Capital LP and affiliated entities filed a Schedule 13G disclosing beneficial ownership of 852,669 shares, or 5.14%, of Sutro Biopharma's common stock. The filing is a passive investment disclosure, indicating no intent to influence control of the company.

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Key details

Shares of common stock beneficially owned$853K
Percentage of outstanding shares beneficially owned$5
Total shares of common stock outstanding as of August 7, 2026$16.6M
Reporting person / beneficial ownerCoastlands Capital LP
Direct holder of 852,669 sharesCoastlands Capital Partners LP
General partner of coastlands capital partners lpCoastlands Capital GP LLC
General partner of coastlands capital lpCoastlands Capital LLC
Issuer of the securitiesSutro Biopharma, Inc.
Control person of coastlands capital lp and affiliatesMatthew D. Perry
Chief operating officer of coastlands capital llc and coastlands capital gp llcMark Shamia

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Frequently asked questions

What did STRO file with the SEC on Nov 9, 2026?

STRO filed a SCHEDULE 13G (SEC filing). Coastlands Capital LP and affiliated entities filed a Schedule 13G disclosing beneficial ownership of 852,669 shares, or 5.14%, of Sutro Biopharma's common stock. The filing is a passive investment disclosure, indicating no intent to influence control of the company.

How do I read a SCHEDULE 13G?

A report the company filed with the SEC (the US market regulator). Start with the summary, then the key amounts and names. Compare it with the company’s earlier filings.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A SCHEDULE 13G (schedule 13g): A report the company filed with the SEC (the US market regulator).

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