X0306 4 2019-02-04 0 0000353569 QUIDEL CORP /DE/ QDEL 0001333458 Bujarski Robert Joseph 12544 HIGH BLUFF DRIVE, SUITE 200 SAN DIEGO CA 92130 0 1 0 0 SVP, Bus Dev & Gen Counsel Common Stock 2019-02-05 4 A 0 1201 0.00 A 42582 D Common Stock 2019-02-05 4 F 0 490 59.00 D 42092 D Non-Qualified Stock Option 59.12 2019-02-04 4 A 0 7246 0.00 A 2029-02-04 Common Stock 7246 7246 D Restricted Stock Units 2019-02-04 4 A 0 3623 0.00 A Common Stock 3623 3623 D Reflects vesting of prior restricted stock units, which 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. 3,623 shares will vest on the second anniversary date of the grant date, February 4, 2021. 1,812 shares will vest on the third anniversary date of the grant date, February 4, 2022. 1,811 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. 3,623 shares will vest on the fourth anniversary date of the grant date, February 4, 2023. Robert J. Bujarski 2019-02-06