Management Change/Compensation (Form 8-K)

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On January 30, 2026, Matthew W. Strobeck, a member of the board of directors (the "Board") of QuidelOrtho Corporation (the "Company"), provided notice to the Board of his decision not to stand for re-electionat the Company's 2026 annual stockholders meeting (the "Annual Meeting"). Dr. Strobeck will continue to serve as a Board member until the Annual Meeting, at which point a reduction in the size of the Board from eleven to ten directors will be effective. Dr. Strobeck's decision not to stand for re-electionwas due to other professional commitments and was not the result of any dispute or disagreement with the Company, the Board or management on any matter relating to the Company's operations, policies or practices. The Company and the Board extend their gratitude to Dr. Strobeck for his eight years of service on the Board and for his contributions during his tenure as a director.