X0306 4 2018-01-16 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 Non-Qualified Stock Options 46.41 2018-01-16 4 A 0 27637 0.00 A 2028-01-16 Common Stock 27637 27637 D Restricted Stock Units 2018-01-16 4 A 0 13819 0.00 A Common Stock 13819 13819 D 13,891 shares will vest on the second anniversary date of the grant date, January 16, 2020. 6,909 shares will vest on the third anniversary date of the grant date, January 16, 2021. 6,909 shares will vest on the fourth anniversary date of the grant date, January 16, 2022. Each restricted stock unit represents the right to receive one share of Quidel Corporation common stock. 13,819 shares will vest on the fourth anniversary date of the grant date, January 16, 2022. This Form 4 relates to annual management awards and is being filed non-timely due to an administrative error. Robert J. Bujarski, attorney-in-fact for Douglas C. Bryant 2018-01-23