QuidelOrtho Corporation

Item 1.01 Entry into a Material Definitive Agreement. On September 23, 2026, QuidelOrtho Corporation (the “Company”) entered into Amendment No. 1 (the “Amendment”) to its existing credit agreement, dated as of August 21, 2025 (as amended by the Amendment, 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) $1.15 billion senior secured term loan A facility (the “Term Loan A”), (ii) a $100.0 million senior secured delayed draw term loan A facility (the “DDTL Term Loan A”; together with the Term Loan A, the “Term Loan A Facilities”), (iii) a $1.45 billion senior secured term loan B facility (the “Term Loan B”) and (iv) a $700.0 million revolving credit facility (the “Revolving Credit Facility” and with the Term Loan A, the DDTL Term Loan A and the Term Loan B, the “Financing”). The Amendment, among other matters, resets the Company’s financial covenant levels through the fiscal quarter ending September 30, 2029 (such period, the “Covenant Relief Period”), to provide for a maximum Consolidated Leverage Ratio and a minimum Consolidated Interest Coverage Ratio (each as defined in the Credit Agreement) for each measurement period as follows: Fiscal Quarters Ending Minimum Consolidated Interest Coverage Ratio Maximum Consolidated Leverage Ratio On or prior to July 2, 2028 2.25 to 1.00 5.50 to 1.00 On October 1, 2028 or December 31, 2028 2.50 to 1.00 5.00 to 1.00 On April 1, 2029 or July 1, 2029 2.75 to 1.00 4.50 to 1.00 On or after September 30, 2029 3.00 to 1.00 4.25 to 1.00 ────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── During the Covenant Relief Period, the initial applicable rate for the Term Loan A Facilities and the Revolving Credit Facility from the Amendment effective date until the first business day after the compliance certificate for the fiscal quarter ending September 28, 2026 is received by the Administrative Agent will be 1.50% per annum for base rate loans and 2.50% per annum for Term SOFR rate loans, and thereafter will be determined in accordance with a pricing grid based on the Company’s Consolidated Leverage Ratio (as defined in the Credit Agreement) ranging from 1.75% to 3.00% per annum for Term SOFR rate loans and from 0.75% to 2.00% per annum for base rate loans. In addition, during the Covenant Relief Period, the Company will pay a commitment fee on the unused portion of the Credit Agreement based on the Company’s Consolidated Leverage Ratio ranging from 0.20% to 0.40% per annum. The interest payable on the Term Loan B remains unchanged by the Amendment. The Financing remains guaranteed by certain material domestic subsidiaries of the Company (the “Guarantors”) and secured by liens on substantially all of the assets of the Company and the Guarantors, excluding real property and certain other types of excluded assets. The Credit Agreement contains affirmative and negative covenants that are customary for credit agreements of this nature. The negative covenants include, among other things, limitations on asset sales, mergers, indebtedness, liens, investments, restricted payments, certain debt prepayments and transactions with affiliates. In connection with the Amendment, certain additional restrictions have been added to the financial covenants during the Covenant Relief Period. The foregoing description of the Amendment does not purport to be complete and is qualified in its entirety by reference to the full text of the Amendment, a copy of which is attached hereto as Exhibit 10.1 to this Current Report on Form 8-K (“Form 8-K”), which is incorporated herein by reference.