X0306 4 2019-05-14 0 0000353569 QUIDEL CORP /DE/ QDEL 0001021412 SCHULER JACK W 12544 HIGH BLUFF DRIVE, SUITE 200 SAN DIEGO CA 92130 1 0 1 0 Common Stock 2019-05-15 4 M 0 1661 0.00 A 3101149 D Restricted Stock Units (Converted) 2019-05-14 4 A 0 875 0.00 A Common Stock 875 875 D Restricted Stock Units (Premium) 2019-05-14 4 A 0 262 0.00 A Common Stock 262 262 D Restricted Stock Units (Equity Grant) 2019-05-14 4 A 0 2100 0.00 A Common Stock 2100 2100 D Reflects release of restricted stock units that were previously reported on Form 4. In addition to the shares reported on this Form 4 as directly owned by the Reporting Person, 65,000 shares are held indirectly by the Reporting Person's spouse and 1,105,263 shares are held indirectly by the Schuler Family Foundation. The Reporting Person disclaims all beneficial ownership of the shares owned by his spouse and the Schuler Family Foundation, except to the extent of his pecuniary interest, if any. Each restricted stock unit represents the right to receive one share of Quidel Corporation common stock. The restricted stock units were received in lieu of cash payments to the reporting person for certain retainer and Board of Director service-related fees under a deferred compensation program applicable to participating non-employee directors. Vested restricted stock units may be deferred, in which case, payment will occur according to the elected deferral schedule. The restricted stock units vest on the date of the grant, May 14, 2019. The restricted stock units vest on May 14, 2020. Robert J. Bujarski, attorney-in-fact for Jack W. Schuler 2019-05-16