Column Group funds add Surrozen (SRZN) shares in insider purchases

Rhea-AI Filing Summary

Surrozen, Inc. (SRZN) reported insider buying by investment funds affiliated with The Column Group. Multiple Column Group limited partnerships, each a 10% owner, disclosed open‑market purchases of Surrozen common stock on January 15, 16 and 20, 2026.

Examples include The Column Group III, LP buying 5,590 shares at $19.889 and 8,484 shares at $19.5999, and The Column Group III-A, LP buying 6,303 shares at $19.889 and 9,568 shares at $19.5999. Following these purchases, The Column Group III, LP reported beneficial ownership of 900,292 shares, The Column Group III-A, LP reported 1,016,658 shares, and The Column Group Opportunity III, LP reported holding 344,827 shares.

The filing notes that general partners and managing partners associated with these funds may be deemed to share voting and investment power but disclaim beneficial ownership except to the extent of their pecuniary interest.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

COLUMN GROUP III GP, LP

(Last) (First) (Middle)

1 LETTERMAN DR., BLDG D, SUITE DM-900

(Street)

SAN FRANCISCO CA 94129

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Surrozen, Inc./DE [ SRZN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
01/15/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

	Form filed by One Reporting Person
X	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	01/15/2026		P		5,590	A	$19.889	890,604	I	By The Column Group III, LP(1)
Common Stock	01/15/2026		P		6,303	A	$19.889	1,005,732	I	By The Column Group III-A, LP(2)
Common Stock	01/16/2026		P		1,204	A	$20	891,808	I	By The Column Group III, LP(1)
Common Stock	01/16/2026		P		1,358	A	$20	1,007,090	I	By The Column Group III-A, LP(2)
Common Stock	01/20/2026		P		8,484	A	$19.5999	900,292	I	By The Column Group III, LP(1)
Common Stock	01/20/2026		P		9,568	A	$19.5999	1,016,658	I	By The Column Group III-A, LP(2)
Common Stock								344,827	I	By The Column Group Opportunity III, LP(3)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person^*

COLUMN GROUP III GP, LP

(Last) (First) (Middle)

1 LETTERMAN DR., BLDG D, SUITE DM-900

(Street)

SAN FRANCISCO CA 94129

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

COLUMN GROUP III-A, LP

(Last) (First) (Middle)

1 LETTERMAN DR., BLDG D, SUITE DM-900

(Street)

SAN FRANCISCO CA 94129

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

COLUMN GROUP III, LP

(Last) (First) (Middle)

1 LETTERMAN DR., BLDG D, SUITE DM-900

(Street)

SAN FRANCISCO CA 94129

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Column Group Opportunity III, LP

(Last) (First) (Middle)

1 LETTERMAN DR., BLDG D, SUITE DM-900

(Street)

SAN FRANCISCO CA 94129

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Column Group Opportunity III GP, LP

(Last) (First) (Middle)

1 LETTERMAN DR., BLDG D, SUITE DM-900

(Street)

SAN FRANCISCO CA 94129

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

TCG Opportunity III GP, LLC

(Last) (First) (Middle)

1 LETTERMAN DR., BLDG D, SUITE DM-900

(Street)

SAN FRANCISCO CA 94129

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Svennilson Peter

(Last) (First) (Middle)

1 LETTERMAN DR., BLDG D, SUITE DM-900

(Street)

SAN FRANCISCO CA 94129

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

Explanation of Responses:

1. The securities are directly held by The Column Group III, LP ("TCG III LP"). The Column Group III GP, LP ("TCG III GP") is the general partner of TCG III LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are Peter Svennilson and Tim Kutzkey, a member of the Issuer's board of directors (collectively, the "Managing Partners"). The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

2. The securities are directly held by The Column Group III-A, LP ("TCG III-A LP"). TCG III GP is the general partner of TCG III-A LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are the Managing Partners. The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

3. The securities are directly held by The Column Group Opportunity III, LP ("TCG Opportunity III LP"). The Column Group Opportunity III GP, LP ("TCG Opportunity III GP LP") is the general partner of TCG Opportunity III LP and may be deemed to have voting, investment and dispositive power with respect to these securities. TCG Opportunity III GP, LLC ("TCG Opportunity III GP LLC") is the general partner of TCG Opportunity III GP LP and the ultimate general partner of TCG Opportunity III LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing members of TCG Opportunity III GP LLC are the Managing Partners. TCG Opportunity III GP LP, TCG Opportunity III GP LLC and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

	/s/ The Column Group III GP, LP /s/ James Evangelista, Attorney-in-Fact	01/20/2026
	/s/ The Column Group III-A, LP. by The Column Group III GP, LP, its general partner /s/ James Evangelista, Attorney-in-Fact	01/20/2026
	/s/ The Column Group III, LP by The Column Group III GP, LP, its general partner /s/ James Evangelista, Attorney-in-Fact	01/20/2026
	/s/ The Column Group Opportunity III, LP /s/ James Evangelista, Attorney-in-Fact	01/20/2026
	/s/ The Column Group Opportunity III GP, LP. by /s/ James Evangelista, Attorney-in-Fact	01/20/2026
	/s/ TCG Opportunity III GP, LLC by /s/ James Evangelista, Attorney-in-Fact	01/20/2026
	/s/James Evangelista, as attorney-in-fact for Peter Svennilson	01/20/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What insider activity did Surrozen (SRZN) disclose in this Form 4?

The filing shows that investment funds affiliated with The Column Group, each a 10% owner, reported open‑market purchases of Surrozen common stock on January 15, 16 and 20, 2026.

Which entities bought Surrozen (SRZN) shares and in what amounts?

The Column Group III, LP reported purchases including 5,590 shares at $19.889, 1,204 shares at $20, and 8,484 shares at $19.5999. The Column Group III-A, LP reported purchases including 6,303 shares at $19.889, 1,358 shares at $20, and 9,568 shares at $19.5999.

How many Surrozen shares did the Column Group funds report owning after these transactions?

After the reported trades, The Column Group III, LP reported 900,292 shares beneficially owned, The Column Group III-A, LP reported 1,016,658 shares, and The Column Group Opportunity III, LP reported holding 344,827 shares of Surrozen common stock.

Were these Surrozen (SRZN) insider transactions direct or indirect holdings?

All reported Surrozen common stock positions in this Form 4 are held indirectly through Column Group limited partnerships, as indicated by the ownership form marked "I" and descriptions such as "By The Column Group III, LP" and related entities.

What do the footnotes say about beneficial ownership in these Surrozen shares?

The footnotes explain that the Surrozen shares are directly held by Column Group funds, while their general partners and managing partners may be deemed to share voting and investment power but disclaim beneficial ownership except to the extent of their respective pecuniary interests.

Did The Column Group Opportunity III, LP trade Surrozen (SRZN) shares in this Form 4?

The Column Group Opportunity III, LP is shown holding 344,827 Surrozen shares indirectly, but the table entry reflects a holding rather than a new purchase or sale in this specific Form 4.