X0306 4 2019-02-04 0 0000353569 QUIDEL CORP /DE/ QDEL 0001406652 BRYANT DOUGLAS C 12544 HIGH BLUFF DRIVE, SUITE 200 SAN DIEGO CA 92130 1 1 0 0 President & CEO Common Stock 2019-02-05 4 A 0 3204 0.00 A 297517 D Common Stock 2019-02-05 4 F 0 1588 59.00 D 295929 D Non-Qualified Stock Options 59.12 2019-02-04 4 A 0 37440 0.00 A 2029-02-04 Common Stock 37440 37440 D Restricted Stock Units 2019-02-04 4 A 0 18720 0.00 A Common Stock 18720 18720 D Reflects release of restricted stock units that were previously reported on a Form 4. 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. 18,720 shares will vest on the second anniversary date of the grant date, February 4, 2021. 9,360 shares will vest on the third anniversary date of the grant date, February 4, 2022. 9,360 shares will vest on the fourth anniversary date of the grant date, February 4, 2023. Each restricted stock unit represents the right to receive one share of Quidel Corporation common stock. 18,720 shares will vest on the fourth anniversary date of the grant date, February 4, 2023. Robert J. Bujarski, attorney-in-fact for Douglas C. Bryant 2019-02-06