Cerus (CERS) COO share sale covers taxes on RSU vesting

Rhea-AI Filing Summary

Cerus Corp Chief Operating Officer Vivek K. Jayaraman reported an open‑market sale of 165,200 shares of common stock on March 12, 2026 at a weighted average price of $1.6572 per share. According to the filing, the sale was executed under an instruction intended to comply with Rule 10b5‑1 and was made to cover statutory tax withholding obligations and related brokerage fees arising from the vesting of restricted stock units, rather than as a discretionary sale. After this transaction, he directly holds 1,747,674 shares of Cerus common stock.

Insider Trade Summary 10b5-1

Net Seller: 165,200 shares ($273,769)

Net Sell 1 txn

Insider Jayaraman Vivek K

Role Chief Operating Officer

Sold 165,200 shs ($274K)

Type	Security	Shares	Price	Value
Sale	Common Stock	165,200	$1.6572	$274K

Holdings After Transaction: Common Stock — 1,747,674 shares (Direct)

Footnotes (1)

1. Represents shares sold pursuant to an instruction intended to comply with the requirement of Rule 10b5-1 that was elected by the Reporting Person on the date of grant to cover statutory tax withholding obligations and corresponding brokerage fees in connection with the vesting of certain restricted stock units and does not represent a discretionary sale by the reporting person. Represents a weighted average sales price. These shares were sold in multiple transactions at prices ranging from $1.62 to $1.73 per share, 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 aforementioned range set forth.

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^*

Jayaraman Vivek K

(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 Operating Officer

3. Date of Earliest Transaction (Month/Day/Year)
03/12/2026

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	03/12/2026		S		165,200(1)	D	$1.6572(2)	1,747,674	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:

1. Represents shares sold pursuant to an instruction intended to comply with the requirement of Rule 10b5-1 that was elected by the Reporting Person on the date of grant to cover statutory tax withholding obligations and corresponding brokerage fees in connection with the vesting of certain restricted stock units and does not represent a discretionary sale by the reporting person.

2. Represents a weighted average sales price. These shares were sold in multiple transactions at prices ranging from $1.62 to $1.73 per share, 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 aforementioned range set forth.

	Vivek K. Jayaraman, by Chrystal N. Jensen, attorney-in-fact	03/16/2026
	** 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.

FAQ

What insider transaction did Cerus (CERS) report for COO Vivek K. Jayaraman?

Cerus reported that COO Vivek K. Jayaraman sold 165,200 shares of common stock. The shares were sold at a weighted average price of $1.6572 per share in a single reported transaction on March 12, 2026.

Was the Cerus (CERS) COO’s Form 4 share sale a discretionary transaction?

No, the Form 4 states the shares were sold under a Rule 10b5‑1 instruction. The sale was intended to cover statutory tax withholding obligations and related brokerage fees from restricted stock unit vesting, and is described as not a discretionary sale.

At what prices were the Cerus (CERS) COO’s shares sold in the March 12, 2026 transaction?

The filing reports a weighted average sales price of $1.6572 per share. It notes that multiple trades occurred in a price range between $1.62 and $1.73 per share, inclusive, on the transaction date.

How many Cerus (CERS) shares does COO Vivek K. Jayaraman hold after the reported sale?

After the reported sale, Vivek K. Jayaraman directly holds 1,747,674 shares of Cerus common stock. This figure is disclosed as the total number of shares beneficially owned following completion of the March 12, 2026 transaction.

Why did the Cerus (CERS) COO sell 165,200 shares according to the Form 4 footnotes?

The footnotes explain that the sale was made to cover statutory tax withholding obligations and related brokerage fees. These obligations arose from the vesting of certain restricted stock units, and the transaction was executed under a Rule 10b5‑1 instruction.

What does the Rule 10b5-1 reference mean in the Cerus (CERS) COO’s Form 4 filing?

The filing states the sale followed an instruction intended to comply with Rule 10b5‑1 requirements. This indicates a pre‑established trading instruction, emphasizing that the sale was structured to handle tax obligations from RSU vesting rather than being timed at the insider’s discretion.