Surrozen director receives 5,550 stock options

Surrozen director Christopher Y. Chai received a grant of stock options covering 5,550 shares of common stock.

Rhea-AI Filing Summary

Surrozen director Christopher Y. Chai received a grant of stock options covering 5,550 shares of common stock. The options carry an exercise price of $30.14 per share and expire on May 12, 2036. They vest and become exercisable on the anniversary of the May 13, 2026 grant date, subject to his continuous service as a director. Following this compensation-related award, his directly held option position reported in this filing totals 5,550 options.

Insider Trade Summary

Grant/Award: 5,550 shares

Grant/Award 1 txn

Insider CHAI CHRISTOPHER Y

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Director Stock Option (right to buy)	5,550	$0.00	$0.00

Holdings After Transaction: Director Stock Option (right to buy) — 5,550 contracts (Direct)

Footnotes (1)

1. F1. The options vest and become exercisable on the anniversary of the grant date, subject to continuous service as a director.

Key Figures

Option grant size: 5,550 options Exercise price: $30.14 per share Expiration date: May 12, 2036 +2 more

5 metrics

Option grant size 5,550 options Director stock option grant on May 13, 2026

Exercise price $30.14 per share Exercise price of director stock options

Expiration date May 12, 2036 Option expiration for director grant

Underlying shares 5,550 shares Common stock underlying the options

Post‑grant option holdings 5,550 options Total options held following transaction

Key Terms

Director Stock Option, grant/award acquisition, exercise price, expiration date, +1 more

5 terms

Director Stock Option financial

"security_title: "Director Stock Option (right to buy)""

grant/award acquisition financial

"transaction_action: "grant/award acquisition""

exercise price financial

"conversion_or_exercise_price: "30.1400""

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

expiration date financial

"expiration_date: "2036-05-12T00:00:00.000Z""

The expiration date is the deadline after which a financial contract, such as an option or a futures agreement, is no longer valid or can be exercised. It matters to investors because it determines the timeframe during which they can take action or benefit from the contract, similar to how a coupon or a food item has a limited period of usefulness. Once the expiration date passes, the contract loses its value or ability to be used.

continuous service as a director financial

"The options vest and become exercisable on the anniversary of the grant date, subject to continuous service as a director."

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Surrozen (SRZN) director Christopher Y. Chai report on this Form 4?

Christopher Y. Chai reported receiving a grant of stock options for 5,550 shares of Surrozen common stock. The award is a compensation-related option grant, not an open-market stock purchase or sale, and represents his total reported option holdings in this filing.

What are the key terms of Christopher Chai’s Surrozen stock option grant?

The grant covers 5,550 options with an exercise price of $30.14 per share and an expiration date of May 12, 2036. These are director stock options linked to Surrozen common stock and are reported as directly owned by Mr. Chai.

When do Christopher Chai’s Surrozen director stock options vest?

The options vest and become exercisable on the anniversary of the May 13, 2026 grant date. Vesting is conditioned on Mr. Chai’s continuous service as a director through that anniversary, according to the footnote disclosure in the filing.

How many Surrozen options does Christopher Chai hold after this transaction?

After this transaction, Christopher Chai is reported as holding 5,550 director stock options. This figure matches the size of the option grant, indicating these options constitute his total reported derivative position in this particular Form 4 filing.

Is Christopher Chai’s Surrozen Form 4 transaction an open-market trade?

No, the Form 4 reflects a grant of director stock options classified as a grant, award, or other acquisition. The transaction is a compensation-related option award, not an open-market buy or sell of Surrozen common stock by Christopher Chai.

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

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Accepted by SEC EDGAR 05/14/2026 - 04:27 PM EDT Learn about SEC filing dates

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^*

CHAI CHRISTOPHER Y

(Last) (First) (Middle)

C/O SURROZEN, INC.

171 OYSTER POINT BLVD., SUITE 400

(Street)

SOUTH SAN FRANCISCO CALIFORNIA 94080

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/13/2026

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

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

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

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

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
Director Stock Option (right to buy)	$30.14	05/13/2026		A		5,550		05/13/2027(1)	05/12/2036	Common Stock	5,550	$0	5,550	D

Explanation of Responses:

1. The options vest and become exercisable on the anniversary of the grant date, subject to continuous service as a director.

	/s/ Charles Williams, Attorney-in-Fact for Christopher Y Chai	05/14/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)