X0306 4 2018-06-12 0 0000353569 QUIDEL CORP /DE/ QDEL 0001609320 Kroll Werner 12544 HIGH BLUFF DRIVE, SUITE 200 SAN DIEGO CA 92130 0 1 0 0 SVP, R&D Common Stock 2018-06-12 4 S 0 2500 66.1568 D 16005 D The weighted average sale price for these transactions was $66.1568 per share, with a range of $66.15 to $66.18. 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. Robert J. Bujarski, attorney-in-fact for Werner Kroll 2018-06-13