X0609 4 2026-05-15 0 0001906324 QuidelOrtho Corp QDEL 0001492289 Blaser Brian J. false 9975 SUMMERS RIDGE ROAD SAN DIEGO CA 92121 0 1 0 0 President and CEO 0 Common Stock 2026-05-15 4 A 0 20759 0 A 45901 D Common Stock 2026-05-15 4 F 0 10252 10.32 D 35649 D Common Stock 40073 I By Trust Restricted Stock Units 2026-05-15 4 M 0 20759 0 D Common Stock 20759 20759 D Reflects release of restricted stock units that were previously reported on a Form 3. 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. Each restricted stock unit represents the right to receive one share of QuidelOrtho Corporation common stock. 20,759 shares vested on each of May 15, 2025 and May 15, 2026; the remaining 20,759 shares will vest on May 15, 2027. /s/ Euna Greene, attorney-in-fact for Brian J. Blaser 2026-05-19