X0306 4 2020-08-03 0 0000353569 QUIDEL CORP /DE/ QDEL 0001067586 STEWARD RANDALL J 9975 SUMMERS RIDGE ROAD SAN DIEGO CA 92121 0 1 0 0 Chief Financial Officer Common Stock 2020-08-03 4 M 0 9775 15.40 A 12623 D Common Stock 2020-08-03 4 M 0 11391 21.08 A 24014 D Common Stock 2020-08-03 4 S 0 21166 286.3142 D 2848 D Non-Qualified Options 15.40 2020-08-03 4 M 0 9775 0.00 D 2026-02-10 Common Stock 9775 0 D Non-Qualified Stock Options 21.08 2020-08-03 4 M 0 11391 0.00 D 2027-02-15 Common Stock 11391 3796 D The weighted average sale price for these transactions was $286.3142 per share, with a range of $284.15 to $288.98. Upon request, the Reporting Person hereby undertakes to provide to staff of the U.S. Securities and Exchange Commission, the Issuer, or a security holder, the full information regarding the number of shares sold at each separate price. 19,552 shares vested on the second anniversary date of the grant date, February 10, 2018. 9,776 vested on the third anniversary date of the grant date, February 10, 2019. 9,775 shares vested on the fourth anniversary date of the grant date, February 10, 2020. 7,594 shares vested on the second anniversary date of the grant date, February 15, 2019. 3,797 shares vested on the third anniversary date of the grant date, February 15, 2020. 3,796 shares will vest on the fourth anniversary date of the grant date, February 15, 2021. Robert J. Bujarski, attorney-in-fact for Randall J. Steward 2020-08-05