QuidelOrtho Corp

Evaluation of disclosure controls and procedures: We have performed an evaluation under the supervision and with the participation of our management, including our CEO and CFO, of the effectiveness of our disclosure controls and procedures, as defined in Exchange Act Rules 13a-15(e) and 15d-15(e). Based on that evaluation, our CEO and CFO concluded that our disclosure controls and procedures were not effective at a reasonable assurance level as of September 28, 2025 due to the material weaknesses in our internal control over financial reporting that was previously reported in the Company’s Annual Report.

Notwithstanding the material weakness, we have concluded that the Company’s unaudited Consolidated Financial Statements included in this report are fairly stated in all material respects in accordance with GAAP for each of the periods presented.

Ongoing remediation efforts to address the previously identified material weaknesses: With respect to the material weaknesses in our internal control over financial reporting that was previously reported in the Company’s Annual Report, management, under the oversight of the Audit Committee, is in the process of designing appropriate controls to address these material weaknesses. While we have taken steps to implement our remediation plan, the material weaknesses will not be considered remediated until the enhanced controls operate for a sufficient period of time and management has concluded, through testing, that the related controls are effective. The Company is monitoring the effectiveness of its remediation plan and refining its remediation plan as appropriate.

Implementation of ERP systems: In June 2025, we began migrating certain of our financial processing systems to a new instance of SAP. These system implementations are part of our ongoing global integration efforts and continued through the third quarter of 2025. We plan to continue implementing such systems throughout other parts of our businesses in phases over the next several years. In connection with these ERP implementations, we are updating and will continue to update our internal control over financial reporting, as necessary, to accommodate modifications to our business processes and accounting procedures. These system implementations resulted in changes that materially affected our internal control over financial reporting but did not have an adverse effect, nor do we expect will have an adverse effect, on our internal control over financial reporting. In connection with our system integration efforts and resulting business process changes, we continue to enhance the design and documentation of our internal control over financial reporting processes to maintain effective controls over our financial reporting. These business process changes have not materially affected, and we do not expect them to materially affect, our internal control over financial reporting.

Changes in internal control over financial reporting: Except with respect to the continued implementation of ERP systems, there were no changes in our internal control over financial reporting during the fiscal quarter ended September 28, 2025 that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting. We will continue to assess the impact on our internal control over financial reporting as we continue to implement our ERP solution.