X0609 4 2026-10-15 0 0001906324 QuidelOrtho Corp QDEL 0002040321 Siegrist Jonathan Philip false 9975 SUMMERS RIDGE ROAD SAN DIEGO CA 92121 0 1 0 0 EVP of R&D & CTO 0 Common Stock 2026-10-15 4 M 0 18657 0 A 32076 D Common Stock 2026-10-15 4 F 0 6695 13.91 D 25381 D Restricted Stock Units 2026-10-15 4 M 0 18657 0 D Common Stock 18657 18657 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. 18,656 shares vested on October 15, 2025; 18,657 shares vested on October 15, 2026; and the remaining 18,657 shares will vest on October 15, 2027. /s/ Euna Greene, attorney-in-fact for Jonathan P. Siegrist 2026-10-19