(Exact name of registrant as specified in its charter) Maryland Securities registered pursuant to Section12(g) of the Act: None 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 whether the registrant (1)has filed all reports required to be filed by Section13 or 15(d) of the Securities Exchange Act of 1934during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2)has been subject to such filingrequirements for the 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 12months (or for such shorter period that the registrant was required to submit such files).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 the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growthcompany” in Rule 12b-2 of the Exchange Act. Large accelerated filer☒Accelerated filer☐Non–accelerated filer☐Smaller reporting company☐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 issuedits audit 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 received byany 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 voting and non-voting common stock held by non-affiliates of the registrant computed by reference to the last sales price ofsuch stock, as of the last business day of the registrant’s most recently completed second fiscal quarter, which was June27, 2025, was approximately$106.5billion. There were 230,080,240 shares of our common stock, $1 par value per share, outstanding as of January26, 2026. DOCUMENTS INCORPORATED BY REFERENCE Portions of Lockheed Martin Corporation’s 2026 Definitive Proxy Statement are incorporated by reference into Part III of this Form 10‑K. The 2026Definitive Proxy Statement will be filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year to which this reportrelates. Lockheed Martin Corporation Form 10-KFor the Year Ended December31, 2025 Table of Contents PART I ITEM1.BusinessITEM1A.Risk FactorsITEM1B.Unresolved Staff CommentsITEM1C.CybersecurityITEM2.PropertiesITEM3.Legal ProceedingsITEM4.Mine Safety DisclosuresInformation about our Executive Officers PART II ITEM5.Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of EquitySecurities27ITEM6.[Reserved]28ITEM7.Management’s Discussion and Analysis of Financial Condition and Results of Operations29ITEM7A.Quantitative and Qualitative Disclosures About Market Risk49ITEM8.Financial Statements and Supplementary Data50ITEM9.Changes in and Disagreements with Accountants on Accounting and Financial Disclosure93ITEM9A.Controls and Procedures93ITEM9B.Other Information95ITEM9C.Disclosure Regarding Foreign Jurisdictions that Prevent Inspections95 PART III ITEM10.Directors, Executive Officers and Corporate Governance95ITEM11.Executive Compensation95ITEM12.Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters96ITEM13.Certain Relationships and Related Transactions, and Director Independence96ITEM14.Principal Accounting Fees and Services96 PART IV ITEM15.Exhibits and Financial Statement Schedules97ITEM16.Form 10-K Summary101 SIGNATURES102 PART I ITEM1.Business General We are a global aerospace and defense technology company that builds and sustains the solutions America and its allies need todeter conflict and advance national security and scientific exploration objectives. Our four business areas – Aeronautics, Missiles andFire Con