X0306 4 2017-02-24 0 0000353569 QUIDEL CORP /DE/ QDEL 0001406652 BRYANT DOUGLAS C 12544 HIGH BLUFF DRIVE, SUITE 200 SAN DIEGO CA 92130 1 1 0 0 President & CEO Common Stock 2017-02-24 4 M 0 44000 8.50 A 322958 D Common Stock 2017-02-24 4 S 0 44000 21.1065 D 278958 D Common Stock 2017-02-24 4 A 0 1061 0.00 A 280019 D Common Stock 2017-02-24 4 F 0 398 21.15 D 279621 D Common Stock 2017-02-25 4 A 0 1097 0.00 A 280718 D Common Stock 2017-02-25 4 F 0 412 21.15 D 280306 D Common Stock 2017-02-27 4 M 0 17212 8.50 A 297518 D Common Stock 2017-02-27 4 M 0 18788 12.36 A 316306 D Common Stock 2017-02-27 4 S 0 36000 21.815 D 280306 D Common Stock 2017-02-28 4 M 0 26920 12.36 A 307226 D Common Stock 2017-02-28 4 S 0 26920 21.296 D 280306 D Non-Qualified Stock Options 8.50 2017-02-24 4 M 0 44000 0.00 D 2013-04-10 2019-04-10 Common Stock 44000 17212 D Non-Qualified Stock Options 8.50 2017-02-27 4 M 0 17212 0.00 D 2013-04-10 2019-04-10 Common Stock 17212 0 D Non-Qualified Stock Options 12.36 2017-02-27 4 M 0 18788 0.00 D 2013-02-02 2019-02-02 Common Stock 18788 681212 D Non-Qualified Stock Options 12.36 2017-02-28 4 M 0 26920 0.00 D 2013-02-02 2019-02-02 Common Stock 26920 654292 D This transaction was effected pursuant to a pre-established 10b5-1 trading plan. The amount of securities beneficially owned following this transaction include an additional 1,113 shares due to the Reporting Person's purchase of shares pursuant to the Issuer's Employee Stock Purchase Plan. The weighted average sale price for these transactions was $21.1065 per share, with a range of $20.80 to $21.47 per share. 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. Reflects release of restricted stock units that were previously reported on Form 4. Disposition of shares, as set forth above, was in connection with the Issuer's withholding of common shares to satisfy tax withholding obligations related to the issuance of common shares upon release of restricted stock units. The weighted average sale price for these transactions was $21.815 per share, with a range of $21.24 to $22.14 per share. 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 $21.296 per share, with a range of $20.96 to $21.77 per share. 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 Douglas C. Bryant 2017-02-28