X0609 4 2026-07-31 0002009684 Seaport Entertainment Group Inc. SEG 0001663789 PARTRIDGE MATTHEW MORRIS false 199 WATER STREET 28TH FLOOR NEW YORK NY 10038 true true false false Chief Executive Officer 0 Common Stock 2026-07-31 4 F 0 4544 26.23 D 111071 D On July 31, 2026, Seaport Entertainment Group Inc. (the "Issuer") withheld 4,544 shares of common stock of the Issuer from the Reporting Person for payment of the tax liability incident to the vesting of shares of common stock granted by the Issuer pursuant to the terms of the Issuer's 2024 Equity Incentive Plan. /s/ Lenah Elaiwat, Attorney-in-Fact 2026-08-03