X0306 4 2018-08-17 0 0000353569 QUIDEL CORP /DE/ QDEL 0001631320 Abney Michael Donald Jr. 12544 HIGH BLUFF DRIVE, SUITE 200 SAN DIEGO CA 92130 0 1 0 0 SVP - Distribution Common Stock 2018-08-17 4 M 0 17596 15.40 A 26153 D Common Stock 2018-08-17 4 S 0 17596 70.4027 D 8721 D Non-Qualified Stock Options 15.40 2018-08-17 4 M 0 17596 0.00 D 2026-02-10 Common Stock 17596 17596 D The weighted average sale price for these transactions was $70.40272 per share, with a range of $70.01 to $71.01. 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. The amount of securities beneficially owned following this transaction include an additional 164 shares due to the Reporting Person's purchase of shares pursuant to the Issuer's Employee Stock Purchase Plan. 17,596 shares vested on 2/10/2018; 8,798 shares will vest on 2/10/2019; 8,798 shares will vest on 2/10/2020. All transactions reported herein were effected pursuant to a 10b5-1 trading plan. Robert J. Bujarski, attorney-in-fact for Michael D. Abney, Jr. 2018-08-21