Cerus (CERS) COO sells 16,667 shares in planned 10b5-1 trade

Rhea-AI Filing Summary

CERUS CORP Chief Operating Officer Vivek K. Jayaraman reported an open-market sale of company stock. On May 1, 2026, he sold 16,667 shares of Cerus common stock at $3.00 per share. After this transaction, he directly holds 1,673,374 common shares. The filing notes the sale was executed pursuant to a Rule 10b5-1 trading plan, indicating it was carried out under a pre-arranged instruction rather than as a discretionary trade.

Insider Trade Summary 10b5-1

Net Seller: 16,667 shares ($50,001)

Net Sell 1 txn

Insider Jayaraman Vivek K

Role Chief Operating Officer

Sold 16,667 shs ($50K)

Type	Security	Shares	Price	Value
Sale	Common Stock	16,667	$3.00	$50K

Holdings After Transaction: Common Stock — 1,673,374 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares sold: 16,667 shares Sale price: $3.00 per share Shares held after sale: 1,673,374 shares +1 more

4 metrics

Shares sold 16,667 shares Open-market sale of Cerus common stock on May 1, 2026

Sale price $3.00 per share Price for the 16,667 common shares sold

Shares held after sale 1,673,374 shares Direct common stock holdings following the transaction

Transaction code S Form 4 code indicating a sale in open market or private transaction

Key Terms

Rule 10b5-1 plan, open-market sale, Form 4

3 terms

Rule 10b5-1 plan regulatory

"This transaction was executed pursuant to a 10b5-1 plan."

A Rule 10b5-1 plan is a prearranged, written schedule that lets corporate insiders buy or sell company stock at set times or amounts, even if they later learn material nonpublic information. Think of it like setting an automatic thermostat for trades: it creates a clear record that trades were planned in advance, reducing the risk of insider-trading accusations and helping investors trust that insider transactions are routine rather than based on secret information.

open-market sale financial

"transaction_action: open-market sale of common stock at $3.00 per share"

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.

Form 4 regulatory

"The transaction was reported on a Form 4 insider filing."

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

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 CALIFORNIA 94520

(City) (State) (Zip)

UNITED STATES

(Country)

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

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		S		16,667(1)	D	$3	1,673,374	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. This transaction was executed pursuant to a 10b5-1 plan.

	Vivek K. Jayaraman, by Chrystal N. Jensen, attorney-in-fact	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)

FAQ

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

Cerus disclosed that COO Vivek K. Jayaraman sold 16,667 shares of common stock in an open-market transaction at $3.00 per share. The sale was reported on a Form 4 insider filing and classified as a non-derivative transaction in common stock.

When did the Cerus (CERS) COO sell his shares and at what price?

The Cerus COO sold his shares on May 1, 2026, at a price of $3.00 per share. The transaction involved 16,667 shares of common stock and was reported as an open-market sale in the Form 4 insider filing.

How many Cerus (CERS) shares does the COO hold after the reported sale?

After the reported sale, the Cerus COO directly holds 1,673,374 shares of common stock. This post-transaction holding figure comes directly from the Form 4, which lists total shares following the transaction for the reporting person.

Was the Cerus (CERS) COO’s stock sale made under a Rule 10b5-1 plan?

Yes, the Form 4 footnote states the transaction was executed pursuant to a Rule 10b5-1 plan. Such plans are pre-arranged trading programs that allow insiders to sell shares according to predetermined instructions, reducing the role of discretionary timing.

What type of security did the Cerus (CERS) insider sell in this Form 4 filing?

The insider sold Cerus common stock, classified as a non-derivative security in the Form 4. The filing reports an open-market sale of 16,667 common shares at $3.00 per share, with no associated options or other derivative instruments listed.