Werner Kroll - May 27, 2021 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: May 27, 2021
Transactions value $: -$273,132
Form type: 4
Date filed: 6/1/2021, 07:56 PM
Next filing: Jul 2, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	QDEL	Common Stock	Options Exercise	$0	+4.38K	+53.9%	$0.00	12.5K	May 27, 2021	Direct	F1
transaction	QDEL	Common Stock	Tax liability	-$273K	-2.25K	-17.99%	$121.50^*	10.2K	May 27, 2021	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	-4.38K	-50%	$0.00	4.38K	May 27, 2021	Common Stock	4.38K		Direct	F3, F4

* 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 share upon release of restricted stock units.
F3	Restricted stock units convert into common stock on a one-for-one basis.
F4	Award of time-based restricted stock with the following vesting: 4,377 shares vested on the fifth anniversary date of the grant date, May 27, 2019; 4,376 shares vested on the sixth anniversary date of the grant date, May 27, 2020; 4,376 shares vested on the seventh anniversary date of the grant date, May 27, 2021; 4,376 shares will vest on the eighth anniversary date of the grant date, May 27, 2022.