Surrozen (SRZN): Boxer Capital group discloses 8.9% ownership stake in 13G/A

Rhea-AI Filing Summary

Boxer Capital Management, LLC and affiliated entities, together with Aaron Davis, report beneficial ownership of Surrozen, Inc. common stock on an amended Schedule 13G. As of June 30, 2026, the group beneficially owned 1,039,017 shares of common stock, representing 8.9% of the class, based on 11,610,371 shares outstanding as of May 4, 2026. The Reporting Persons have no sole voting or dispositive power and instead report shared voting and shared dispositive power over all 1,039,017 shares.

Key Figures

Shares beneficially owned: 1,039,017 shares Ownership percentage: 8.9% Shares outstanding baseline: 11,610,371 shares +1 more

4 metrics

Shares beneficially owned 1,039,017 shares Surrozen common stock beneficially owned by the Reporting Persons as of June 30, 2026

Ownership percentage 8.9% Percent of Surrozen common stock class beneficially owned by the Reporting Persons

Shares outstanding baseline 11,610,371 shares Surrozen common stock outstanding as of May 4, 2026, from Form 10-Q

Shared voting and dispositive power 1,039,017 shares Shares over which the Reporting Persons have shared voting and shared dispositive power

Key Terms

beneficially owned, shared voting power, shared dispositive power, percent of class, +1 more

5 terms

beneficially owned financial

"aggregate number of shares of securities of the Issuer beneficially owned by such Reporting Person"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

shared voting power financial

"Shared Voting Power 1,039,017.00"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

shared dispositive power financial

"Shared Dispositive Power 1,039,017.00"

percent of class financial

"sets forth the percentages of securities of the Issuer beneficially owned"

Percent of class is the portion of a specific category of securities—such as a company’s common shares, preferred shares, or a bond series—that takes part in or approves a corporate action (vote, consent, tender, etc.). Investors watch this number because it reveals how much support or opposition exists within that particular shareholder group; like counting how many members of a club back a proposal, it can determine whether a plan passes or how influence is distributed.

Schedule 13G regulatory

"Row 9 of each Reporting Person's cover page to this sets forth"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

FAQ

What ownership stake in SRZN is reported by Boxer Capital Management on this Schedule 13G/A?

Boxer Capital Management and related Reporting Persons report beneficial ownership of 1,039,017 Surrozen (SRZN) shares, representing 8.9% of the outstanding common stock, based on 11,610,371 shares outstanding as of May 4, 2026.

What percentage of Surrozen (SRZN) common stock do the Reporting Persons hold?

The Reporting Persons hold 8.9% of Surrozen’s common stock. This percentage is calculated using 11,610,371 shares outstanding as of May 4, 2026, as reported in Surrozen’s Form 10-Q filed on May 6, 2026.

How many Surrozen (SRZN) shares are beneficially owned by Boxer Capital and affiliates?

Boxer Capital Management, Boxer Holdings entities, and Aaron Davis beneficially own 1,039,017 shares of Surrozen common stock. All of these shares are reported with shared voting and shared dispositive power, with no sole power over any shares.

Do the Reporting Persons have sole or shared voting power over Surrozen (SRZN) shares?

The Reporting Persons report 0 shares with sole voting power and 1,039,017 shares with shared voting power. They likewise report no sole dispositive power and shared dispositive power over 1,039,017 shares of Surrozen common stock.

As of what date is the Surrozen (SRZN) ownership information in this Schedule 13G/A reported?

The beneficial ownership information is reported as of June 30, 2026. The percentage of class, 8.9%, is based on 11,610,371 shares outstanding as of May 4, 2026, referenced from Surrozen’s May 6, 2026 Form 10-Q.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/14/2026 - 04:11 PM Accepted by SEC EDGAR 08/14/2026 - 04:05 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Surrozen, Inc./DE

(Name of Issuer)

Common Stock, $0.0001 par value per share

(Title of Class of Securities)

86889P208

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 86889P208

1

Names of Reporting Persons

Boxer Capital Management, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 1,039,017.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,039,017.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,039,017.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

8.9 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

CUSIP Number(s): 86889P208

1

Names of Reporting Persons

Boxer Holdings, LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 1,039,017.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,039,017.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,039,017.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

8.9 %

12

Type of Reporting Person (See Instructions)

HC, PN

SCHEDULE 13G

CUSIP Number(s): 86889P208

1

Names of Reporting Persons

Boxer Holdings GP, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 1,039,017.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,039,017.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,039,017.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

8.9 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

CUSIP Number(s): 86889P208

1

Names of Reporting Persons

Aaron Davis

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 1,039,017.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,039,017.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,039,017.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

8.9 %

12

Type of Reporting Person (See Instructions)

HC, IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Surrozen, Inc./DE
(b)	Address of issuer's principal executive offices: 171 Oyster Point Blvd, Suite 400, South San Francisco, CA 94080
Item 2.
(a)	Name of person filing: This statement is being jointly filed by (collectively, the "Reporting Persons"): Boxer Capital Management, LLC ("Boxer Capital") Boxer Holdings, LP Boxer Holdings GP, LLC Aaron Davis
(b)	Address or principal business office or, if none, residence: The business address of each Reporting Person is: 12860 El Camino Real, Suite 300, San Diego, CA 92130
(c)	Citizenship: Boxer Capital Management, LLC is a Delaware LLC. Boxer Holdings, LP is a Delaware LP. Boxer Holdings GP, LLC is a Delaware LLC. Aaron Davis is a citizen of the United States.
(d)	Title of class of securities: Common Stock, $0.0001 par value per share
(e)	CUSIP No.: 86889P208
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: Row 9 of each Reporting Person's cover page to this Schedule 13G sets forth the aggregate number of shares of securities of the Issuer beneficially owned by such Reporting Person as of June 30, 2026 and is incorporated by reference.
(b)	Percent of class: 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 June 30, 2026 and is incorporated by reference. Such percentage is based upon 11,610,371 shares of Common Stock outstanding as of May 4, 2026, as reported by the Issuer in its quarterly report on Form 10-Q filed with the Securities and Exchange Commission (the "Commission") on May 6, 2026 (the "Form 10-Q").
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Row 5 of each Reporting Person's cover page to this Schedule 13G sets forth the sole power to vote or to direct the vote of securities of the Issuer beneficially owned by such Reporting Person as of June 30, 2026 and is incorporated by reference.
	(ii) Shared power to vote or to direct the vote: Row 6 of each Reporting Person's cover page to this Schedule 13G sets forth the sole power to vote or to direct the vote of securities of the Issuer beneficially owned by such Reporting Person as of June 30, 2026 and is incorporated by reference.
	(iii) Sole power to dispose or to direct the disposition of: Row 7 of each Reporting Person's cover page to this Schedule 13G sets forth the sole power to vote or to direct the vote of securities of the Issuer beneficially owned by such Reporting Person as of June 30, 2026 and is incorporated by reference.
	(iv) Shared power to dispose or to direct the disposition of: Row 8 of each Reporting Person's cover page to this Schedule 13G sets forth the sole power to vote or to direct the vote of securities of the Issuer beneficially owned by such Reporting Person as of June 30, 2026 and is incorporated by reference.
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Boxer Capital Management, LLC

Signature:	/s/ Aaron Davis
Name/Title:	Boxer Capital Management, LLC, by Aaron Davis its Manager
Date:	08/14/2026

Boxer Holdings, LP

Signature:	/s/ Aaron Davis
Name/Title:	By Boxer Holdings, LP, by Boxer Holdings GP, LLC, its General Partner, by Aaron Davis its Manager
Date:	08/14/2026

Boxer Holdings GP, LLC

Signature:	/s/ Aaron Davis
Name/Title:	By Boxer Holdings GP, LLC by Aaron Davis, its Manager
Date:	08/14/2026

Aaron Davis

Signature:	/s/ Aaron Davis
Name/Title:	By Aaron Davis, an individual
Date:	08/14/2026