LAURENCE M. CORASH - 17 Dec 2021 Form 4 Insider Report for CERUS CORP (CERS)

Role: Chief Scientific Officer
Signature: Laurence M. Corash by Chrystal Menard, attorney-in-fact
Issuer symbol: CERS
Transactions as of: 17 Dec 2021
Net transactions value: +$18,750
Form type: 4
Filing time: 21 Dec 2021, 16:29:42 UTC
Previous filing: 15 Dec 2021
Next filing: 03 Mar 2022
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CERS	Common Stock	Options Exercise	$18,750	+5,000	+0.25%	$3.75	2,027,586	17 Dec 2021	Direct

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	CERS	Option (Right to Buy)	Options Exercise		-5,000	-100%		0	17 Dec 2021	Common Stock	5,000	$3.75	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	One eighth (1/8th) of the shares subject to the Option vested six (6) months after the grant date, and one forty-eighth (1/48th) of the shares subject to the Option vested on the first day of each month thereafter.
F2	Not applicable.