X0609 4 2026-05-29 0 0001906324 QuidelOrtho Corp QDEL 0001377832 Strobeck Matthew false 9975 SUMMERS RIDGE ROAD SAN DIEGO CA 92121 1 0 0 0 0 Common Stock 2026-05-29 4 A 0 6829 0 A 34604 D Common Stock 16630 I UGMA Account Common Stock 38145 I Birchview Restricted Stock Units (Equity Grant) 2026-05-29 4 M 0 6829 0 D Common Stock 6829 0 D Reflects release of restricted stock units that were previously reported on a Form 4. The Reporting Person is custodian under the Uniform Gift to Minor Act of 16,630 shares held by four of the Reporting Person's children. The Reporting Person disclaims beneficial ownership of these shares, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or for any other purpose. The Reporting Person has sole voting and dispositive power with respect to shares held by Birchview Fund, LLC in his capacity as the Managing Partner of such entity. The Reporting Person disclaims beneficial ownership of the shares held by Birchview Fund, LLC except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or for any other purpose. Each restricted stock unit represents the right to receive one share of QuidelOrtho Corporation common stock. The restricted stock units vested on May 29, 2026. /s/ Phillip S. Askim, attorney-in-fact for Matthew W. Strobeck 2026-06-02