*Effective as of June 17, 2025, the QuidelOrtho Board of Directors approved amendments to the Code of Business Ethics and Conduct. These amendments include a new message from the Chief Executive Officer reflecting the company’s core behaviors, enhanced guidance on managerial responsibilities, and clarified procedures for employee disclosures of conflict of interest. The amendments also strengthen policies related to gifts and entertainment, protection and appropriate use of company assets, compliance with antitrust laws, and forced child labor.