Edward K. Russell - Jan 16, 2022 Form 4 Insider Report for QUIDEL CORP /DE/ (QDEL)

Role: SVP, Business Development
Signature: Robert J. Bujarski, attorney-in-fact for Edward K. Russell
Stock symbol: QDEL
Transactions as of: Jan 16, 2022
Transactions value $: -$190,931
Form type: 4
Date filed: 1/19/2022, 07:14 PM

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	QDEL	Common Stock	Award	$0	+4.61K	+17.63%	$0.00	30.7K	Jan 16, 2022	Direct	F1
transaction	QDEL	Common Stock	Tax liability	-$191K	-1.66K	-5.41%	$114.88^*	29.1K	Jan 16, 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	Options Exercise	$0	-4.61K	-100%	$0.00^*	0	Jan 16, 2022	Common Stock	4.61K		Direct	F3

* 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.