X0306 4 2020-10-12 0 0000353569 QUIDEL CORP /DE/ QDEL 0001187716 POLAN MARY LAKE PH D 9975 SUMMERS RIDGE ROAD SAN DIEGO CA 92121 1 0 0 0 Common Stock 2020-10-12 4 S 0 11743 275.8252 D 11141 D The weighted average sale price for these transactions was $275.8252 per share, with a range of $268.54 to $286.72. 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. All transactions reported herein were effected pursuant to a pre-established 10b5-1 trading plan. Robert J. Bujarski, attorney-in-fact for Mary Lake Polan 2020-10-14