William M. Greenman - Feb 25, 2022 Form 4 Insider Report for CERUS CORP (CERS)

Role: President and CEO, Director
Signature: William M. Greenman, by Chrystal Menard, attorney-in-fact
Stock symbol: CERS
Transactions as of: Feb 25, 2022
Transactions value $: -$332,043
Form type: 4
Date filed: 3/1/2022, 08:18 PM
Previous filing: Oct 22, 2021
Next filing: May 31, 2022

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CERS	Common Stock	Options Exercise	$1.43M	+380K	+24.96%	$3.75	1.9M	Feb 25, 2022	Direct	F1
transaction	CERS	Common Stock	Sale	-$1.22M	-215K	-11.32%	$5.69	1.69M	Feb 25, 2022	Direct	F2, F3
transaction	CERS	Common Stock	Sale	-$533K	-93K	-5.51%	$5.73	1.59M	Feb 25, 2022	Direct	F2, F4
transaction	CERS	Common Stock	Award	$0	+218K	+13.64%	$0.00	1.81M	Mar 1, 2022	Direct	F5

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		-380K	-100%		0	Feb 25, 2022	Common Stock	380K	$3.75	Direct	F6, F7
transaction	CERS	Option (Right to Buy)	Award		+435K			435K	Mar 1, 2022	Common Stock	435K	$5.76	Direct	F7, F8

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

Explanation of Responses:

Id	Content
F1	Includes 1,445 and 2,164 shares purchased under Issuer's Employee Stock Purchase Plan on 08/31/21 and 02/28/22.
F2	Represents shares sold to cover the exercise price, the statutory tax withholding obligations and corresponding brokerage fee in connection with the exercise of the option listed in Table II prior to expiration.
F3	The reported price in column 4 is a weighted average price ranging from $5.56 to $5.77 per share. 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.
F4	The reported price in column 4 is a weighted average price ranging from $5.665 to $5.79 per share. 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.
F5	Represents the number of shares underlying RSUs. Each RSU represents a contingent right to receive one share of common stock of the Issuer. The RSUs vests in three equal annual installments beginning on March 12, 2023, subject to the Reporting Person's continuous service to the Issuer through such vesting date.
F6	One eighth (1/8) of the shares subject to the Option shall vest six (6) months after the transaction date and one forty-eighth (1/48th) of the shares subject to the Option shall vest monthly thereafter.
F7	Not applicable.
F8	One forth (1/4) of the shares subject to the Option shall vest on the first anniversary of the grant date, and one forty-eighth (1/48th) of the shares subject to the Option vest monthly thereafter.