SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form10-K ☒ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the fiscal year endedDecember 28, 2024 OR Infinera Corporation (Exact name of registrant as specified in its charter) 6373 San Ignacio Avenue San Jose,CA95119 (Address of principal executive offices, including zip code) (408)572-5200 (Registrant’s telephone number, including area code)Securities registered pursuant to Section12(g) of the Act: None Trading SymbolINFN Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.Yes☐No☒Indicate by check mark if the registrant is not required to file reports pursuant to Section13 or 15(d) of the Act.Yes☐No☒ Indicate by check mark whether the registrant (1)has filed all reports required to be filed by Section13 or 15(d) of the Securities Exchange Act of 1934 duringthe preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2)has been subject to such filing requirements forthe past 90 days.Yes☒No☐ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 ofRegulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit suchfiles).Yes☒No☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or anemerging growth company. See definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one): Large accelerated filer☒Accelerated filer☐Non-acceleratedfiler☐Smallerreportingcompany☐Emerging growth company☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new orrevised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐ Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal controlover financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued itsaudit report.☒ If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filingreflect the correction of an error to previously issued financial statements.☐ Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation receivedby any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b).☐ Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).Yes☐No☒The aggregate market value of the registrant’s common stock, $0.001par value per share, held by non-affiliates of the registrant on June29, 2024, the lastbusiness day of the registrant’s most recently completed second fiscal quarter, was approximately $901,214,832(based on the closing sales price of the registrant’s common stock on that date). Shares of the registrant’s common stock held by each officer and director and each person who owns more than 10% ormore of the outstanding common stock of the registrant have been excluded in that such persons may be deemed to be affiliates. This determination of affiliatestatus is not necessarily a conclusive determination for other purposes. As of February21, 2025,237,991,137shares of the registrant’s common stock, $0.001parvalue per share, were issued and outstanding. INFINERA CORPORATIONANNUAL REPORT ON FORM 10-KFor the Fiscal Year Ended December28, 2024Table of Contents Part I Item1.BusinessItem1A.Risk FactorsItem1B.Unresolved Staff CommentsItem1C.CybersecurityItem2.PropertiesItem3.Legal ProceedingsItem4.Mine Safety Disclosures Part IIItem5.Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity SecuritiesItem6.[RESERVED]Item7.Management’s Discussion and Analysis of Financial Condition and Results of OperationsItem7A.Quantitative and Qualitative Disclosures About Market RiskItem8.Financial Statements and Supplementary DataReports of Independent Registered Public Accounting Firm(PCAOB ID: 42)CONSOLIDATED BALANCE SHEETSCONSOLIDATED STATEMENTS OF OPERATIONSCONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSSCONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITYCONSOLIDATED STATEMENTS OF CASH FLOWSNOTES TO CONSOLIDATED FINANCIAL STATEMENTSItem9.Changes in and Disagreements with Accountants on Accounting and Financial DisclosureItem9A.Controls and ProceduresItem9B.