
Seaport Entertainment GroupInc. (Exact name of registrant as specified in its charter) 199 Water Street,28th FloorNew York, NY(Address of Principal Executive Offices) (212) 732-8257(Registrant’s telephone number, including area code) Securities registered pursuant to Section12(b)of the Act: Securities registered pursuant to Section 12(g) of the Act: NoneIndicate 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 Section 13 or Section 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 during the preceding 12months (or for such shorter period that the registrant was required to file such reports), and (2)has been subject to such filing requirements for the past Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule405 of RegulationS-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 an emerging growthcompany. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule12b-2 of the ExchangeAct. Largeacceleratedfiler☐Acceleratedfiler☒Non-accelerated filer☐Smallerreportingcompany☐Emerginggrowthcompany☒ 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 or revised financialaccounting standards provided pursuant to Section13(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 control over financialreporting 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 its 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 filing reflect thecorrection 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 by any of theregistrant’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 Act).Yes☐No☒ On June 30, 2025, the last business day of the Registrant’s most recently completed second fiscal quarter, the aggregate market value of the Registrant’s common stock held bynon-affiliates of the Registrant was $142,445,101based on the closing sales price of the Registrant’s common stock on such date as reported on the New York Stock Exchange.For purposes of this computation, all officers, directors and 10% beneficial owners of the Registrant’s common stock of which the Registrant is aware are deemed to beaffiliates. Such determination should not be deemed to be an admission that such officers, directors or 10% beneficial owners are, in fact, affiliates of the Registrant As of March 3, 2026, there were 12,796,250 shares of the registrant’s common stock outstanding. DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant’s Proxy Statement for its 2026 Annual Meeting of Stockholders are incorporated by reference in Part III of this Annual Report on Form 10-K.The registrant intends to file its Proxy Statement with the Securities and Exchange Commission no later than 120 days after the end of its fiscal year ended December 31, 2025. TABLE OF CONTENTS Part I Item 1.BusinessItem 1A.Risk FactorsItem 1B.Unresolved Staff CommentsItem 1C.CybersecurityItem 2.PropertiesItem 3.Legal ProceedingsItem 4.Mine Safety Disclosure Part II52Item 5.Market for Registrant’s Common Equity, Related Stockholders Matters and IssuerPurchases of Equity Securities52Item 6.[Reserved]54Item 7.Management’s Discussion and Analysis of Financial Condition and Results ofOperations54Item 7A.Quantitative and Qualitative Disclosures about Market Risk73Item 8.Financial Statements and Supplementary Data75Item 9.Changes in and Disagreements with Accountants on Accounting and FinancialDisclosure118Item 9A.Controls and Procedures118Item 9B.Other Information119Item 9C.Disclosure Regarding Foreign Jurisdictions that Prevent Inspections119 Item 10Directors, Executive Officers and Corporate Governance119Item 11Executive Compensation119Item 12.Security Ownership of Certai