Werner Kroll - Jan 31, 2022 Form 4 Insider Report for QUIDEL CORP /DE/ (QDEL)

Role: SVP, R&D
Signature: Robert J. Bujarski, attorney-in-fact for Werner Kroll
Stock symbol: QDEL
Transactions as of: Jan 31, 2022
Transactions value $: -$66,610
Form type: 4
Date filed: 2/2/2022, 08:57 PM
Previous filing: Jan 19, 2022
Next filing: Feb 8, 2022

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	QDEL	Common Stock	Award	$0	+1.31K	+10.14%	$0.00	14.2K	Feb 1, 2022	Direct	F1
transaction	QDEL	Common Stock	Tax liability	-$66.6K	-651	-4.57%	$102.32^*	13.6K	Feb 1, 2022	Direct	F2

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	QDEL	Restricted Stock Units	Award	$0	+10.6K		$0.00	10.6K	Jan 31, 2022	Common Stock	10.6K		Direct	F3, F4
transaction	QDEL	Restricted Stock Units	Award	$0	+7.26K		$0.00	7.26K	Jan 31, 2022	Common Stock	7.26K		Direct	F3, F5
transaction	QDEL	Restricted Stock Units	Options Exercise	$0	-1.31K	-33.32%	$0.00	2.63K	Feb 1, 2022	Common Stock	1.31K		Direct	F3, F6

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

Explanation of Responses:

Id	Content
F1	Reflects release of restricted stock units that were previously reported on a Form 4.
F2	Disposition of shares, as set forth above, was in connection with the Issuer's withholding of common shares to satisfy tax withholding obligations related to the issuance of common shares upon release of restricted stock units.
F3	Each restricted stock unit represents the right to receive one (1) share of Quidel Corporation common stock.
F4	3,547 shares vest on the first anniversary date of the grant date, January 31, 2023; 3,547 shares vest on the second anniversary date of the grant date, January 31, 2024; and 3,548 shares vest on the third anniversary date of the grant date, January 31, 2025.
F5	3,628 shares vest on the second anniversary date of the grant date, January 31, 2024; 1,814 shares vest on the third anniversary date of the grant date, January 31, 2025; and 1,814 shares vest on the fourth anniversary date of the grant date, January 31, 2026.
F6	One-third of the shares subject to the original grant vest annually over a three-year period, commencing on the first anniversary date of the grant date.