Surrozen COO sells shares to cover RSU taxes

Surrozen (SRZN) Chief Operating Officer Charles O. Williams reported routine equity compensation activity and related tax sales.

Rhea-AI Filing Summary

Surrozen (SRZN) Chief Operating Officer Charles O. Williams reported routine equity compensation activity and related tax sales. On May 1, 2026, he exercised 5,625 Restricted Stock Units (RSUs) at $0.00 per share, receiving the same number of common shares. On May 4, 2026, 2,036 common shares were sold at a weighted average price of about $33.33 per share to cover withholding taxes, in transactions initiated by the company on his behalf. After these transactions, he directly holds 16,571 common shares. The filing also notes RSUs scheduled to vest in two equal installments on May 1, 2026 and May 1, 2027.

Insider Trade Summary

Exercise and sale activity reported; no spread calculated

Exercise and Sale 3 txns

Insider Williams Charles O

Role Chief Operating Officer

Sold 2,036 shs ($68K)

Approx. gross sale proceeds $68K

Approx. exercise cost $0.00

Type	Security	Shares	Price	Value
Sale	Common Stock	2,036	$33.3328	$68K
Exercise	Restricted Stock Unit	5,625	$0.00	$0.00
Exercise	Common Stock	5,625	$0.00	$0.00

Holdings After Transaction: Restricted Stock Unit — 5,625 contracts (Direct); Common Stock — 16,571 shares (Direct)

Footnotes (3)

1. F1. Each restricted stock unit, or RSU, represents a contingent right to receive one share of the Issuer's common stock.
2. F2. The shares were sold to cover withholding taxes upon vesting of RSUs in transactions that were initiated by the Issuer on the reporting person's behalf. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.04 to $33.63, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.
3. F3. These RSUs vest in two equal installments on May 1, 2026 and May 1, 2027.

Key Figures

Shares sold: 2,036 shares Weighted average sale price: $33.3328 per share RSUs exercised: 5,625 units +3 more

6 metrics

Shares sold 2,036 shares Common stock sold on May 4, 2026 to cover taxes

Weighted average sale price $33.3328 per share Tax-related sale of 2,036 shares in multiple trades

RSUs exercised 5,625 units RSUs converted to common stock on May 1, 2026

Exercise price $0.00 per share Conversion of 5,625 RSUs into common stock

Shares held after transactions 16,571 shares Direct Surrozen common stock ownership post-transactions

Sale price range $33.04–$33.63 per share Price range for multiple tax-cover sales on May 4, 2026

Key Terms

Restricted Stock Unit, weighted average price, withholding taxes, derivative exercise/conversion, +1 more

5 terms

Restricted Stock Unit financial

"Each restricted stock unit, or RSU, represents a contingent right to receive one share"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

weighted average price financial

"The price reported in Column 4 is a weighted average price"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

withholding taxes financial

"The shares were sold to cover withholding taxes upon vesting of RSUs"

Withholding taxes are amounts a payer or government takes out of payments — such as wages, interest, or dividends — before the recipient gets the money, functioning like a cashier keeping part of a bill to pay taxes on your behalf. For investors this matters because it reduces the cash they actually receive, affects net returns and yield calculations, and may require additional paperwork or treaty claims to recover or offset the withheld amount against final tax bills.

derivative exercise/conversion financial

"transaction_action": "derivative exercise/conversion""

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

FAQ

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

What insider transactions did SRZN COO Charles O. Williams report?

Williams reported exercising 5,625 Restricted Stock Units for common shares and selling 2,036 Surrozen (SRZN) shares. The sale was used to cover tax withholding obligations tied to RSU vesting and was initiated by the company on his behalf.

At what prices were Charles O. Williams’ SRZN shares sold?

The reported sale price is a weighted average of $33.3328 per share. Footnotes state the 2,036 Surrozen (SRZN) shares were sold in multiple transactions at prices ranging from $33.04 to $33.63 per share, all to cover withholding taxes.

How many Surrozen (SRZN) shares does the COO hold after these transactions?

Following the reported transactions, Chief Operating Officer Charles O. Williams directly holds 16,571 shares of Surrozen common stock. This reflects his position after exercising 5,625 RSUs and selling 2,036 shares to satisfy related tax withholding obligations.

Were the SRZN share sales by the COO discretionary market trades?

The filing states the 2,036 Surrozen (SRZN) shares were sold to cover withholding taxes upon RSU vesting. These transactions were initiated by the issuer on Williams’ behalf, indicating they were tax-related rather than discretionary open-market sales for investment reasons.

What do the reported RSUs for SRZN’s COO represent?

Each Restricted Stock Unit (RSU) represents a contingent right to receive one Surrozen common share. The filing notes RSUs that vest in two equal installments on May 1, 2026 and May 1, 2027, reflecting time-based equity compensation for the Chief Operating Officer.

How many RSUs did Charles O. Williams exercise in this SRZN filing?

Williams exercised 5,625 Restricted Stock Units, receiving 5,625 shares of Surrozen common stock at an exercise price of $0.00 per share. This conversion from RSUs into shares increased his direct share holdings before the related tax withholding sale.

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

Form 4 Insider Transactions: What Each Field Means →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Accepted by SEC EDGAR 05/05/2026 - 04:54 PM 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^*

Williams Charles O

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/01/2026

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
Common Stock	05/01/2026		M		5,625	A	(1)	18,607	D
Common Stock	05/04/2026		S		2,036	D	$33.3328(2)	16,571	D

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
Restricted Stock Unit	(1)	05/01/2026		M			5,625	(3)	(3)	Common Stock	5,625	$0	5,625	D

Explanation of Responses:

1. Each restricted stock unit, or RSU, represents a contingent right to receive one share of the Issuer's common stock.

2. The shares were sold to cover withholding taxes upon vesting of RSUs in transactions that were initiated by the Issuer on the reporting person's behalf. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.04 to $33.63, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

3. These RSUs vest in two equal installments on May 1, 2026 and May 1, 2027.

	/s/ Charles Williams	05/05/2026
	** 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)