X0306 4 2018-01-03 0 0000353569 QUIDEL CORP /DE/ QDEL 0001720077 BORKAR RATAN S 12544 HIGH BLUFF DRIVE SUITE 200 SAN DIEGO CA 92130 0 1 0 0 SVP, Intl Comm Operations Common Stock 2018-01-03 4 M 0 12611 15.19 A 20253 D Common Stock 2018-01-03 4 M 0 7679 22.21 A 27932 D Common Stock 2018-01-03 4 S 0 20290 45.00 D 7642 D Common Stock 2018-01-04 4 M 0 9590 22.21 A 17232 D Common Stock 2018-01-04 4 S 0 9590 45.48 D 7642 D Non-Qualified Stock Option 15.19 2018-01-03 4 M 0 12611 0.00 D 2016-03-02 2022-03-02 Common Stock 12611 0 D Non-Qualified Stock Option 22.21 2018-01-03 4 M 0 7679 0.00 D 2017-02-25 2023-02-25 Common Stock 7679 9590 D Non-Qualified Stock Option 22.21 2018-01-04 4 M 0 9590 0.00 D 2017-02-25 2023-02-25 Common Stock 9590 0 D All transactions reported herein were effected pursuant to a pre-established 10b5-1 trading plan. Robert J. Bujarski, attorney-in-fact for Ratan S. Borkar 2018-01-05