Carol Moore - Nov 5, 2021 Form 4 Insider Report for CERUS CORP (CERS)

Role: SVP Reg. & Quality
Signature: Carol Moore by Chrystal Menard, attorney-in-fact
Stock symbol: CERS
Transactions as of: Nov 5, 2021
Transactions value $: -$460,691
Form type: 4
Date filed: 11/9/2021, 07:38 PM
Next filing: Jan 5, 2022

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CERS	Common Stock	Options Exercise	$413K	+110K	+61.26%	$3.75	290K	Nov 5, 2021	Direct	F1
transaction	CERS	Common Stock	Sale	-$873K	-110K	-37.76%	$7.94	181K	Nov 5, 2021	Direct	F1, F2, F3

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		-110K	-100%		0	Nov 5, 2021	Common Stock	110K	$3.75	Direct	F4, F5

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

Explanation of Responses:

Id	Content
F1	This transaction was executed pursuant to a 10b5-1 plan.
F2	The reported price in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $7.81 to $8.05 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.
F3	Includes 1,721 shares purchased under Issuer's Employee Stock Purchase Plan on 08/31/21.
F4	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 each month thereafter.
F5	Not applicable.