X0306 4 2019-02-25 0 0000353569 QUIDEL CORP /DE/ QDEL 0001277462 GIBSON KAREN 12544 HIGH BLUFF DRIVE, SUITE 200 SAN DIEJO CA 92130 0 1 0 0 SVP, IS & Bus. Transformation Common Stock 2019-02-25 4 M 0 2449 15.40 A 7545 D Common Stock 2019-02-25 4 S 0 2449 68.436 D 5096 D Common Stock 2019-02-27 4 M 0 13551 15.40 A 18647 D Common Stock 2019-02-27 4 S 0 13551 66.2282 D 5191 D Non-Qualified Stock Options 15.40 2019-02-25 4 M 0 2449 0.00 D 2026-02-10 Common Stock 2449 19057 D Non-Qualified Stock Options 15.40 2019-02-27 4 M 0 13551 0.00 D 2026-02-10 Common Stock 13551 5506 D The weighted average sale price for these transactions was $68.436 per share, with a range of $68.22 to $68.78. 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 weighted average sale price for these transactions was $66.2282 per share, with a range of $66.00 to $66.50. 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 prior to this transaction included an additional 95 shares due to the Reporting Person's purchase of shares pursuant to the Issuer's Employee Stock Purchase Plan. 10,754 shares vested on 02/10/2018; 5,376 shares vested on 02/10/2019; 5,375 shares will vest on 02/10/2020. Robert J. Bujarski, attorney-in-fact for Karen C. Gibson 2019-02-27