SEC filingsOct 12, 2026 to Oct 19, 2026: insiders reported 840 purchases and sales across 212 companies.840 insider purchases and sales in 7 daysSee the filings →
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Company profile

STRO

Sutro Biopharma, Inc.
NASDAQHealth Care

Latest close: 10.94 USD · Oct 16, 2026 · 1 year · split-adjusted

On the price, the facts of the public record●Results filed
With an account, also○dividends▲splits◌next earningswith an account

End-of-day prices provided by Twelve Data · One close per session; the series does not update during the trading day.

Latest on record

The most recent facts, as filed.

Up to three of the most recent, checkable facts already loaded on this page, each linked to its source.

  1. Aug 12, 2026Quarterly report · 10-QFiled by the company itself.Open the filing ↗
  2. Aug 12, 2026Material event · 8-KFiled by the company itself.Open the filing ↗
  3. Jun 8, 2026Material event · 8-KFiled by the company itself.Open the filing ↗

In numbers

What this profile holds, counted.

Closes · 1 year250
SEC filings on record58620 flagged findings
Reported transactions (Form 4)80since May 1, 2025 · and 25 other holdings
Corporate events (8-K)30since Dec 1, 2020

What the record says

Description, identity and filings, each with its source.

Every block cites its source. The colour of a finding marks its category — which document, who filed it — not how much it matters.

What the company does

Sutro Biopharma, Inc. is a publicly traded biotechnology company headquartered in South San Francisco, California focused on clinical-stage drug discovery, development and manufacturing. Using a proprietary cell-free protein synthesis platform, Sutro is working on oncology therapeutics using protein engineering and rational design. Founded in 2003 under the name Fundamental Applied Biology, the company name changed to Sutro Biopharma in 2009. William Newell, CEO as of 2024, joined Sutro in January 2009.

Source: Wikipedia (CC BY-SA 4.0) · copied on Sep 3, 2026 · may not reflect recent changes.

SEC topics

Regulatory history

Topics detected in its SEC reports, with the original excerpt.

Each topic is assigned by a classifier over the full filing; the excerpts show where it was detected and are not always enough to verify it. Open the filing to read it in full.

  • 2026-05-14share offering or dilution eventrecentOpen filing ↗
    “…primarily from upfront, milestone and other payments under our collaboration agreements with BMS, Merck, Astellas, Vaxcyte, Ipsen,…”
    +1 more passage from the same document
    • “…capital to support and expand such activities and providing general and administrative support for these operations. We have…”
  • 2026-05-14listing compliance noticerecentOpen filing ↗
    “…among other things, that the minimum bid price of a listed company’s stock be at or above $1.00. On June 20, 2025, we received…”
    +1 more passage from the same document
    • “…dramatic and adverse impact on the market price of our common stock. If we fail to maintain compliance with Nasdaq’s minimum listing…”
  • 2026-05-14reverse splitrecentOpen filing ↗
    “…Company to maintain its operations for a period of at least 12 months following the filing date of these interim condensed…”
    +1 more passage from the same document
    • “…operations for a period of at least 12 months following the filing date of these interim condensed financial statements. 9 Reverse…”
  • 2026-04-01capital return (buybacks/dividends)recentOpen filing ↗
    “…the method used to determine such rate or rates; • the date or dates from which interest, if any, will be payable and any…”
    +1 more passage from the same document
    • “…the offering price, if any, and the exercise price are payable; • if applicable, a discussion of material U.S. federal income tax…”
  • 2026-03-23capital return (buybacks/dividends)recentOpen filing ↗
    “…the method used to determine such rate or rates; • the date or dates from which interest, if any, will be payable and any…”
    +1 more passage from the same document
    • “…the offering price, if any, and the exercise price are payable; • if applicable, a discussion of material U.S. federal income tax…”

Original excerpts from SEC filings, untranslated. Not advice and not a prediction.

Reverse splits in 5 years

1 reverse split in 5 years (1:10 on Dec 3, 2025) · 1:10 cumulative

The other times: of 818 securities that did their first reverse split in 5 years, a year later the median was worth 0.53× the price on the day of the split; 382 lost more than half and 209 rose (809 with a price a year later).

Our own series, not the whole market: based on the splits we have on record (provider and SEC); an unrecorded one does not count. Historical distribution, not a prediction.

SEC record

SEC dossier

What this company has filed with the SEC, in plain language.

The 25 most recent filings (of 586)

Everything filed

Every SEC filing, newest first, with what it is. Below, each type with its own explanation.

  • Sep 22, 26Form 4 ↗Insider transaction
  • Aug 14, 26SCHEDULE 13G/A ↗Passive stake · Perceptive Advisors LLC · 7.9% · event on Jun 30, 26 · amendment
  • Aug 14, 26SCHEDULE 13G/A ↗Passive stake · Point72 Asset Management, L.P. · 1.4% · event on Jun 30, 26 · amendment
  • Aug 12, 2610-Q ↗Quarterly report
  • Aug 12, 268-K ↗Current report · Results · Communication to the market
  • Jul 30, 26SCHEDULE 13G ↗Passive stake · BlackRock, Inc. · 6.4% · event on Jun 30, 26
  • Insider transaction · 8 Form 4 filingsshow all 8hide
  • Jun 8, 268-K ↗Current report · Shareholder vote results
  • Jun 2, 26Form 4 ↗Insider transaction
  • May 15, 26SCHEDULE 13G/A ↗Passive stake · Kynam Capital Management, LP · 5.3% · event on Mar 31, 26 · amendment
  • May 15, 26SCHEDULE 13G ↗Passive stake · Srinivas Akkaraju · 6.4% · event on Feb 11, 26
  • May 14, 2610-Q ↗Quarterly report
  • May 14, 268-K ↗Current report · Results
  • May 14, 26SCHEDULE 13G/A ↗Passive stake · Affinity Asset Advisors, LLC · 6.5% · event on Mar 31, 26 · amendment
  • May 1, 26SCHEDULE 13G ↗Passive stake · Point72 Asset Management, L.P. · 5.7% · event on Apr 24, 26
  • Apr 22, 26DEFA14A ↗Shareholder meeting and votes
  • Apr 22, 26DEF 14A ↗Shareholder meeting and votes
  • Apr 21, 26SCHEDULE 13G ↗Passive stake · Perceptive Advisors LLC · 5.4% · event on Apr 14, 26

586 filings on record, the oldest from Jun 29, 18.

Listing the 25 most recent filings of the 586 on record.

8-Ks, explained

Stress3Structure23Governance14
  • Mar 23, 26StructureA material agreement was terminated+2 more in the same filing8-K 1.02 ↗
  • Feb 10, 26StructureEntered a material agreement+2 more in the same filing8-K 1.01 ↗
  • Sep 29, 25StressRestructuring plan with committed costs+1 more in the same filing8-K 2.05 ↗
  • Jun 25, 25StressListing notice (8-K 3.01)8-K 3.01 ↗
  • Jun 2, 25GovernanceA senior executive left or was appointed8-K 5.02 ↗
  • Apr 14, 25GovernanceA senior executive left or was appointed8-K 5.02 ↗
  • Mar 13, 25StressRestructuring plan with committed costs+3 more in the same filing8-K 2.05 ↗
  • Aug 12, 24GovernanceA senior executive left or was appointed8-K 5.02 ↗
  • Apr 2, 24StructureEntered a material agreement+1 more in the same filing8-K 1.01 ↗
  • Apr 2, 24StructureSold unregistered shares+3 more in the same filing8-K 3.02 ↗
  • Nov 27, 23StructureEntered a material agreement8-K 1.01 ↗
  • Nov 21, 23GovernanceA senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗

15 older filings not shown · The record reaches back to Nov 8, 18.

Corporate events are tracked from 2004-08-23, when the SEC renumbered 8-K items. Earlier filings use an incompatible numbering and are not classified here.

Ownership and control

Schedule 13G: short-form filing

The short form, for holders who meet specific requirements: institutional investors, passive investors without a control purpose, or exempt investors. Asset managers and index funds usually file it.

  • Perceptive Advisors LLC7.9%Jun 30, 26SCHEDULE 13G/A ↗3 co-filers on this document — the figure is the largest single stake, not their sum. · 1 earlier filing
  • Affinity Healthcare Fund, LP7.8%Oct 16, 25SCHEDULE 13G ↗2 co-filers on this document — the figure is the largest single stake, not their sum.
  • BVF PARTNERS L P/IL7.6%Feb 10, 26SCHEDULE 13G ↗10 co-filers on this document — the figure is the largest single stake, not their sum.
  • Affinity Asset Advisors, LLC6.5%Mar 31, 26SCHEDULE 13G/A ↗2 co-filers on this document — the figure is the largest single stake, not their sum. · 1 earlier filing
  • BlackRock, Inc.6.4%Jun 30, 26SCHEDULE 13G ↗1 earlier filing
show 4 more holdershide
  • Srinivas Akkaraju6.4%Feb 11, 26SCHEDULE 13G ↗5 co-filers on this document — the figure is the largest single stake, not their sum.
  • Kynam Capital Management, LP5.3%Mar 31, 26SCHEDULE 13G/A ↗3 co-filers on this document — the figure is the largest single stake, not their sum.
  • Point72 Asset Management, L.P.1.4%Jun 30, 26SCHEDULE 13G/A ↗3 co-filers on this document — the figure is the largest single stake, not their sum. · 1 earlier filing
  • Millennium Management LLC1.3%Mar 31, 26SCHEDULE 13G/A ↗3 co-filers on this document — the figure is the largest single stake, not their sum.

Structured 13D/G data starts 2023-12, when the SEC moved these filings to a machine-readable format. Earlier filings exist but are not parsed here.

SEC record

Insider transactions

Buys and sells reported by officers, directors and major shareholders on SEC Form 4.

Buys and sells

  • Oct 15, 25Buy$40KCONNIE MATSUI↗
  • Oct 15, 25Buy$16KGregory K. ChowCFO↗
  • Oct 15, 25Buy$10KJane ChungChief Executive Officer↗
  • Oct 15, 25Buy$14KHans-Peter GerberCHIEF SCIENTIFIC OFFICER↗
  • Oct 15, 25Buy$10KDavid PaulingChief Admin. Ofcr. & GC↗
Stock compensation, tax and giftsshow the 35 other transactionshide

Stock compensation, tax withholding, option exercises and gifts. They are listed separately and are not included in the purchase and sale totals. The type describes the transaction, not the filer's intent.

  • Sep 18, 26Compensationamount n/aHans-Peter GerberCHIEF SCIENTIFIC OFFICER↗
  • Sep 18, 26Tax$21KHans-Peter GerberCHIEF SCIENTIFIC OFFICER↗
  • Jun 2, 26Compensationamount n/aGregory K. ChowCFO↗
  • Mar 4, 26Compensationamount n/aJane ChungChief Executive Officer↗
  • Mar 4, 26Tax$6KJane ChungChief Executive Officer↗
  • Mar 4, 26Compensationamount n/aDavid PaulingChief Admin. Ofcr. & GC↗
  • Mar 4, 26Tax$6KDavid PaulingChief Admin. Ofcr. & GC↗
  • Mar 2, 26Compensationamount n/aJane ChungChief Executive Officer↗
  • Mar 2, 26Tax$57KJane ChungChief Executive Officer↗
  • Mar 2, 26Compensationamount n/aHans-Peter GerberCHIEF SCIENTIFIC OFFICER↗
  • Mar 2, 26Tax$24KHans-Peter GerberCHIEF SCIENTIFIC OFFICER↗
  • Mar 2, 26Compensationamount n/aDavid PaulingChief Admin. Ofcr. & GC↗
  • Mar 2, 26Tax$20KDavid PaulingChief Admin. Ofcr. & GC↗
  • Mar 1, 26Compensationamount n/aJane ChungChief Executive Officer↗
  • Mar 1, 26Compensationamount n/aJane ChungChief Executive Officer↗
  • Mar 1, 26Tax$26KJane ChungChief Executive Officer↗
  • Mar 1, 26Compensationamount n/aHans-Peter GerberCHIEF SCIENTIFIC OFFICER↗
  • Mar 1, 26Tax$9KHans-Peter GerberCHIEF SCIENTIFIC OFFICER↗
  • Mar 1, 26Compensationamount n/aDavid PaulingChief Admin. Ofcr. & GC↗
  • Mar 1, 26Compensationamount n/aDavid PaulingChief Admin. Ofcr. & GC↗
  • Mar 1, 26Tax$11KDavid PaulingChief Admin. Ofcr. & GC↗
  • Dec 12, 25Compensationamount n/aJane ChungChief Executive Officer↗
  • Dec 12, 25Tax$7KJane ChungChief Executive Officer↗
  • Sep 18, 25Compensationamount n/aHans-Peter GerberCHIEF SCIENTIFIC OFFICER↗
  • Sep 18, 25Tax$12KHans-Peter GerberCHIEF SCIENTIFIC OFFICER↗
  • Aug 9, 25Compensationamount n/aJane ChungChief Executive Officer↗
  • Aug 9, 25Tax$5KJane ChungChief Executive Officer↗
  • Jul 8, 25Compensationamount n/aBarbara LeymanChief Business Officer↗
  • Jul 8, 25Tax$7KBarbara LeymanChief Business Officer↗
  • May 15, 25Compensationamount n/aEDWARD C ALBINICFO AND SECRETARY↗
  • May 15, 25Compensationamount n/aEDWARD C ALBINICFO AND SECRETARY↗
  • May 15, 25Compensationamount n/aEDWARD C ALBINICFO AND SECRETARY↗
  • May 15, 25Tax$14KEDWARD C ALBINICFO AND SECRETARY↗
  • May 1, 25Compensationamount n/aAnne Elizabeth BorgmanCHIEF MEDICAL OFFICER↗
  • May 1, 25Compensationamount n/aAnne Elizabeth BorgmanCHIEF MEDICAL OFFICER↗

The full record holds 176 transactions and goes back to Jan 27, 23.

Its sector and its market

Sutro Biopharma, Inc. among Health Care companies

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Coverage

What sits behind this page.

Where each figure comes from and how far it reaches.

Prices
End-of-day closes provided by Twelve Data. One close per session; not real time. Closes adjusted for splits.
Series quality
250 clean closes in the period.
SEC records
586 documents on file, from Jun 29, 2018 to Sep 22, 2026.
Company description
Wikipedia, read on Sep 3, 2026.
This page
Generated on Oct 19, 2026; refreshed through the day.

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