Surrozen, Inc.: 5%+ holders

As of November 7, 2026, 10 holders' latest Schedule 13D or 13G filings report owning 5% or more of Surrozen, Inc. The largest reported stake is The Column Group III GP, LP's, at 21.4%. 29 filings are on record since August 13, 2025 (Schedule 13D/A, November 6, 2026).

5AM Partners VII, LLC also filed stake reports on 1 other company ↓

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Key facts

• Event date 2026-11-06 · Holder: The Column Group III GP, LP · Percent: 21.4% · Shares: 2,951,433 · SCHEDULE 13D/A
• Filed 2026-10-22 · Holder: The Column Group III GP, LP · Percent: 21.5% · SCHEDULE 13D/A
• Filing 2026-10-07 · Reporting person: Boxer Capital Management, LLC · Sole voting: 0 · Shared voting: 1,360,683 · Sole dispositive: 0 · Shared dispositive: 1,360,683 · SCHEDULE 13G/A, 2026-10-07
• Filing 2026-10-01 · Reporting person: Commodore Capital LP · Sole voting: 0 · Shared voting: 885,000 · Sole dispositive: 0 · Shared dispositive: 885,000 · SCHEDULE 13G, 2026-10-01
• Filed 2026-08-14 · Holder: Braidwell LP · Percent: 3.9% · SCHEDULE 13G/A

Surrozen, Inc. has 29 Schedule 13D or 13G filings on record since 2025-08-13. 10 holders' latest filing reports 5% or more of common stock, $0.0001 par value per share. Each figure below is the holder's own, as filed, with the filing linked.

Holders

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More on Surrozen, Inc. and the records around it.

Surrozen, Inc. elsewhere on the record

• Form D filing Apr 2025
• Who owns it

Companies that share a holder

• 5AM Partners VII, LLC also filed stake reports on 1 other company: SKYE BIOSCIENCE, INC. (Sep 2026)
• Boxer Capital Management, LLC also filed stake reports on 1 other company: Q32 Bio Inc. (Nov 2026)
• BRAIDWELL LP also filed stake reports on 1 other company: Amanat Acquisition Corp. (Aug 2026)

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What the Full Report on Surrozen, Inc. covers

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Voting and dispositive power, as filed

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The latest filing identifies Surrozen, Inc. by CUSIP 86889P208 and gives its principal executive office as 171 Oyster Point Blvd, Suite 400, South San Francisco, CA 94080 (SCHEDULE 13D/A, 2026-11-06).

What the percentages are based on

Row 11 of each Reporting Person's cover page to this Schedule 13G sets forth the percentages of securities of the Issuer beneficially owned by such Reporting Person as of September 30, 2026 and is incorporated by reference.Boxer Capital Management, LLC, SCHEDULE 13G/A, 2026-10-07

Row 11 of each Reporting Person's cover page to this Schedule 13G sets forth the percentages of the securities of the Issuer beneficially owned by such Reporting Person as of June 30, 2026 and is incorporated by reference.5AM Partners VII, LLC, SCHEDULE 13G/A, 2026-08-11

As of June 30, 2026, each Reporting Person may be deemed to be the beneficial owner of approximately 3.9% of the shares of common stock outstanding.Braidwell LP, SCHEDULE 13G/A, 2026-08-14

Source of funds (Item 3)

The information set forth in Item 3 of the Original Schedule 13D is incorporated herein by reference.The Column Group III GP, LP, SCHEDULE 13D/A, 2026-11-06

Purpose of Transaction (Item 4)

The Column Group III GP, LP

The information set forth in Item 4 of the Original Schedule 13D is incorporated herein by reference.Item 4 of the SCHEDULE 13D/A filed 2026-11-06

Timeline

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Questions about who owns Surrozen, Inc.

Who owns Surrozen, Inc.?

On this page, 10 holders' latest ownership filings report 5% or more of Surrozen, Inc.: The Column Group III GP, LP (21.4%, Schedule 13D/A, filed 2026-11-06), Boxer Capital Management, LLC (11.6%, Schedule 13G/A, filed 2026-10-07), Chen Yu (9.9%, Schedule 13G/A, filed 2026-07-24), Venrock Healthcare Capital Partners III, L.P. (9.9%, Schedule 13G/A, filed 2026-05-15) and RA Capital Management, L.P. (9.2%, Schedule 13G/A, filed 2026-02-17); 5 more are listed above.

Who are the largest shareholders of Surrozen, Inc.?

By the share each holder's latest filing reports, the largest holders of Surrozen, Inc. on this page are The Column Group III GP, LP (21.4%), Boxer Capital Management, LLC (11.6%) and Chen Yu (9.9%).

When did The Column Group III GP, LP buy into Surrozen, Inc.?

The filings give report dates, not purchase dates. The earliest filing from The Column Group III GP, LP on this page is the Schedule 13D/A, filed 2026-01-22, reporting 35.1%; its latest, Schedule 13D/A filed 2026-11-06, reports 21.4%. That earliest filing is itself an amendment, which updates an earlier report.

Is this an audit or a full list?

Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 29 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.

Also on the record for Surrozen, Inc.

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Where this comes from

Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.

Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.

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