X0306 4 2020-05-14 0 0000353569 QUIDEL CORP /DE/ QDEL 0001021412 SCHULER JACK W 9975 SUMMERS RIDGE ROAD SAN DIEGO CA 92121 1 0 1 0 Common Stock 2020-05-14 4 M 0 2100 0.00 A 3103249 D Restricted Stock Units 2020-05-14 4 M 0 2100 0.00 D Common Stock 2100 0 D Reflects release of restricted stock units that were previously reported on Form 4. In addition to the shares reported on this Form 4 as directly owned by the Reporting Person, 65,000 shares are held indirectly by the Reporting Person's spouse and 1,105,263 shares are held indirectly by the Schuler Family Foundation. The Reporting Person disclaims all beneficial ownership of the shares held by his spouse and the Schuler Family Foundation, except to the extent of his pecuniary interest, if any. Restricted stock units convert into common stock on a one-for-one basis. On May 14, 2019, the reporting person was granted 2,100 restricted stock units vesting on the first anniversary of the grant date. Robert J. Bujarski, attorney-in-fact for Jack W. Schuler 2020-05-18