Results of Operations and Financial Condition. On August 6, 2026, QuidelOrtho Corporation (“QuidelOrtho”) issued a press release announcing the financial results for its second quarter ended June 28, 2026 and will hold an earnings conference call at 2:00 p.m., Pacific Time, on August 6, 2026 to discuss such results. A copy of the press release is furnished with this Current Report on Form 8-K (“Form 8-K”) as Exhibit 99.1. The information in this Form 8-K, including Exhibit 99.1, is being furn…

Chief Financial Officer — Micah Young: Micah Young was hired as the new Chief Financial Officer to succeed Joseph M. Busky, who is retiring.

Results of Operations and Financial Condition. On May 5, 2026, QuidelOrtho Corporation (“QuidelOrtho”) issued a press release announcing the financial results for its first quarter ended March 29, 2026 and will hold an earnings conference call at 2:00 p.m., Pacific Time, on May 5, 2026 to discuss such results. A copy of the press release is furnished with this Current Report on Form 8-K (“Form 8-K”) as Exhibit 99.1. The information in this Form 8-K, including Exhibit 99.1, is being furnished…

Results of Operations and Financial Condition. On April 15, 2026, QuidelOrtho Corporation (“QuidelOrtho”) issued a press release announcing its preliminary unaudited revenue for its first quarter of 2026, ended March 29, 2026. A copy of the press release is furnished with this Current Report on Form 8-K (“Form 8-K”) as Exhibit 99.1. The information in this Form 8-K, including Exhibit 99.1, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange…

Chief Legal Officer and Corporate Secretary — Michelle A. Hodges: Michelle A. Hodges is retiring from her roles with a named successor in place.

Chief Financial Officer — Joseph M. Busky: Mr. Busky plans to retire for personal reasons.

Results of Operations and Financial Condition. On February 11, 2026, QuidelOrtho Corporation (“QuidelOrtho”) issued a press release announcing the financial results for its fourth quarter and full year ended December 28, 2025 and will hold an earnings conference call at 2:00 p.m., Pacific Time, on February 11, 2026 to discuss such results. A copy of the press release is furnished with this Current Report on Form 8-K (“Form 8-K”) as Exhibit 99.1. The information in this Form 8-K, including Exh…

Director — Matthew W. Strobeck: Dr. Strobeck decided not to stand for re-election due to other professional commitments.

Results of Operations and Financial Condition. On November 5, 2025, QuidelOrtho Corporation (“QuidelOrtho”) issued a press release announcing the financial results for its third quarter ended September 28, 2025 and will hold an earnings conference call at 2:00 p.m., Pacific Time, on November 5, 2025 to discuss such results. A copy of the press release is furnished with this Current Report on Form 8-K (“Form 8-K”) as Exhibit 99.1. The information in this Form 8-K, including Exhibit 99.1, is be…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. As discussed in

Entry into a Material Definitive Agreement. On August 21, 2025 (the “Closing Date”), QuidelOrtho Corporation (the “Company”) entered into a Credit Agreement (the “Credit Agreement”) by and among the Company, as borrower, Bank of America, N.A., as administrative agent and swing line lender (“Bank of America”), and the other lenders and L/C issuers party thereto (together with Bank of America, the “Lenders”). Pursuant to the Credit Agreement, the Lenders provided the Company with (i) a $1.15 bi…

Results of Operations and Financial Condition. On August 5, 2025, QuidelOrtho Corporation (“QuidelOrtho”) issued a press release announcing the financial results for its second quarter ended June 29, 2025 and will hold an earnings conference call at 2:00 p.m., Pacific Time, on August 5, 2025 to discuss such results. A copy of the press release is furnished with this Current Report on Form 8-K (“Form 8-K”) as Exhibit 99.1. The information in this Form 8-K, including Exhibit 99.1, is being furn…

The filing discloses the approval of an equity incentive plan amendment, which is a compensatory arrangement rather than a change in management personnel.

Results of Operations and Financial Condition. On May 7, 2025, QuidelOrtho Corporation (“QuidelOrtho”) issued a press release announcing the financial results for its first quarter ended March 30, 2025 and will hold an earnings conference call at 2:00 p.m., Pacific Time, on May 7, 2025 to discuss such results. A copy of the press release is furnished with this Current Report on Form 8-K (“Form 8-K”) as Exhibit 99.1. The information in this Form 8-K, including Exhibit 99.1, is being furnished…

Changes in Registrant's Certifying Accountant. Under the supervision of the Audit Committee (the “Audit Committee”) of the Board of Directors of QuidelOrtho Corporation (the “Company”), management recently conducted a competitive selection process to determine the Company’s independent registered public accounting firm for the fiscal year ending December 28, 2025. The Company invited several public accounting firms to participate in this process, including Ernst & Young LLP (“EY”), the Compan…

Results of Operations and Financial Condition. On February 12, 2025, QuidelOrtho Corporation (“QuidelOrtho”) issued a press release announcing the financial results for its fourth quarter and full year ended December 29, 2024 and will hold an earnings conference call at 2:00 p.m., Pacific Time, on February 12, 2025 to discuss such results. A copy of the press release is furnished with this Current Report on Form 8-K (“Form 8-K”) as Exhibit 99.1. The information in this Form 8-K, including Exh…

Results of Operations and Financial Condition. On January 13, 2025, QuidelOrtho Corporation (“QuidelOrtho”) issued a press release announcing its preliminary unaudited revenue results for its fourth quarter ended December 29, 2024. A copy of the press release is furnished with this Current Report on Form 8-K (“Form 8-K”) as Exhibit 99.1. The information in this Form 8-K, including Exhibit 99.1, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exc…

Director — John R. Chiminski, R. Scott Huennekens: The filing discloses the appointment of two new independent directors, which is a routine board composition change rather than an executive departure.

Director — James R. Prutow: Two directors resigned in connection with a major shareholder's exit, but the filing explicitly states there were no disputes or disagreements, indicating an orderly departure rather than a negative shock.

CFO — Joseph M. Busky: The filing discloses that the CFO is assuming additional responsibilities for the IT function and receiving a salary increase, which constitutes a role expansion rather than a departure.

COO — Philip McLellan: The filing is an amendment to disclose the compensation terms for an existing COO appointment, not a departure or new hire.

Chief Operating Officer — Robert J. Bujarski: The company terminated the employment of two senior executives, including the Chief Operating Officer, as part of a leadership reorganization.

Results of Operations and Financial Condition. On November 7, 2024, QuidelOrtho Corporation (“QuidelOrtho”) issued a press release announcing the financial results for its third quarter ended September 29, 2024 and will hold an earnings conference call at 2:00 p.m., Pacific Time, on November 7, 2024 to discuss such results. A copy of the press release is furnished with this Current Report on Form 8-K (“Form 8-K”) as Exhibit 99.1. The information in this Form 8-K, including Exhibit 99.1, is be…

Results of Operations and Financial Condition. On July 31, 2024, QuidelOrtho Corporation (“QuidelOrtho”) issued a press release announcing the financial results for its second quarter ended June 30, 2024 and will hold an earnings conference call at 2:00 p.m., Pacific Time, on July 31, 2024 to discuss such results. A copy of the press release is furnished with this Current Report on Form 8-K (“Form 8-K”) as Exhibit 99.1. The information in this Form 8-K, including Exhibit 99.1, is being furnis…

Results of Operations and Financial Condition. On May 8, 2024, QuidelOrtho Corporation (“QuidelOrtho”) issued a press release announcing the financial results for its first quarter ended March 31, 2024 and will hold an earnings conference call at 2:00 p.m., Pacific Time, on May 8, 2024 to discuss such results. A copy of the press release is furnished with this Current Report on Form 8-K (“Form 8-K”) as Exhibit 99.1. The information in this Form 8-K, including Exhibit 99.1, is being furnished…