Cerus (CERS) Chief Legal Officer reports 55,000-share stock sale

Rhea-AI Filing Summary

Cerus Corporation (CERS) reported an insider stock transaction by its Chief Legal Officer. On 11/24/2025, the officer sold 55,000 shares of Cerus common stock in an open market transaction coded as "S" at a price of $1.70 per share. Following this sale, the officer beneficially owns 728,294 shares of Cerus common stock, held in direct ownership.

Insider Trade Summary

Net Seller: 55,000 shares ($93,500)

Net Sell 1 txn

Insider Jensen Chrystal

Role Chief Legal Officer

Sold 55,000 shs ($94K)

Type	Security	Shares	Price	Value
Sale	Common Stock	55,000	$1.70	$94K

Holdings After Transaction: Common Stock — 728,294 shares (Direct)

Footnotes (1)

Form 4 Insider Transactions: What Each Field Means →

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).

X

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^*

Jensen Chrystal

(Last) (First) (Middle)

C/O CERUS CORPORATION

1220 CONCORD AVE SUITE 600

(Street)

CONCORD CA 94520

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
CERUS CORP [ CERS ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
11/24/2025

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

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

X	Form filed by One Reporting Person
	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	11/24/2025		S		55,000	D	$1.7	728,294	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

Explanation of Responses:

	Chrystal N. Jensen	11/26/2025
	** 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.

FAQ

What insider transaction did Cerus (CERS) report in this Form 4?

The filing reports that Cerus Corporation's Chief Legal Officer sold 55,000 shares of common stock on 11/24/2025 in a transaction coded as a sale ("S").

At what price were the Cerus (CERS) shares sold in the reported transaction?

The 55,000 Cerus common shares were sold at a price of $1.70 per share.

How many Cerus (CERS) shares does the insider own after this transaction?

After the reported sale, the Chief Legal Officer beneficially owns 728,294 shares of Cerus common stock.

What is the role of the reporting person in Cerus (CERS)?

The reporting person is an officer of Cerus Corporation, serving as the company's Chief Legal Officer.

Is this Cerus (CERS) Form 4 filed by one or multiple reporting persons?

The Form 4 is indicated as being filed by one reporting person.

What type of security was involved in the Cerus (CERS) insider transaction?

The transaction involved Cerus Corporation common stock, reported in Table I for non-derivative securities.