SEG

SEC source: 0001663789-26-000011 · form4-09222026_040901.xml · nonDerivative · entry 1

PARTRIDGE MATTHEW MORRIS · CIK 0001663789 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 109,267

F1 · kind: On September 18, 2026, Seaport Entertainment Group Inc. (the "Issuer") withheld 1,804 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.

SEC source: 0001848554-26-000011 · form4-09162026_040901.xml · nonDerivative · entry 1

Hirsh David Z. · CIK 0001848554 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,219

F1 · shares: The common stock was granted under the Seaport Entertainment Group Inc. 2024 Equity Incentive Plan, pursuant to the Seaport Entertainment Group Inc. Independent Director Compensation Program.

SEC source: 0001816348-26-000007 · form4-09162026_040903.xml · nonDerivative · entry 1

Crawford Michael Anthony · CIK 0001816348 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,219

F1 · shares: The common stock was granted under the Seaport Entertainment Group Inc. 2024 Equity Incentive Plan, pursuant to the Seaport Entertainment Group Inc. Independent Director Compensation Program.

SEC source: 0001753207-26-000008 · form4-09162026_040906.xml · nonDerivative · entry 1

Digilio Monica S · CIK 0001753207 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,219

F1 · shares: The common stock was granted under the Seaport Entertainment Group Inc. 2024 Equity Incentive Plan, pursuant to the Seaport Entertainment Group Inc. Independent Director Compensation Program.

SEC source: 0002081265-26-000007 · form4-08032026_040803.xml · nonDerivative · entry 1

Sachs Rebecca E. · CIK 0002081265 · Chief Administrative Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,390

F1 · kind: On July 31, 2026, Seaport Entertainment Group Inc. (the "Issuer") withheld 1,010 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.

SEC source: 0002027972-26-000005 · form4-08032026_040805.xml · nonDerivative · entry 1

Elaiwat Lenah · CIK 0002027972 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,713

F1 · kind: On July 31, 2026, Seaport Entertainment Group Inc. (the "Issuer") withheld 741 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.

SEC source: 0001663789-26-000009 · form4-08032026_040802.xml · nonDerivative · entry 1

PARTRIDGE MATTHEW MORRIS · CIK 0001663789 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 111,071

F1 · kind: 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.

SEC source: 0001848554-26-000004 · form4-06162026_050607.xml · nonDerivative · entry 1

Hirsh David Z. · CIK 0001848554 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,232

F1 · shares: The common stock was granted under the Seaport Entertainment Group Inc. 2024 Equity Incentive Plan, pursuant to the Seaport Entertainment Group Inc. Independent Director Compensation Program.

SEC source: 0001753207-26-000006 · form4-06162026_050604.xml · nonDerivative · entry 1

Digilio Monica S · CIK 0001753207 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,232

F1 · shares: The common stock was granted under the Seaport Entertainment Group Inc. 2024 Equity Incentive Plan, pursuant to the Seaport Entertainment Group Inc. Independent Director Compensation Program.

SEC source: 0001816348-26-000005 · form4-06162026_050601.xml · nonDerivative · entry 1

Crawford Michael Anthony · CIK 0001816348 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,232

F1 · shares: The common stock was granted under the Seaport Entertainment Group Inc. 2024 Equity Incentive Plan, pursuant to the Seaport Entertainment Group Inc. Independent Director Compensation Program.

SEC source: 0001140361-26-016488 · form4.xml · nonDerivative · entry 2

Pershing Square Capital Management, L.P. · CIK 0001336528 · Director · 10% owner

PERSHING SQUARE HOLDCO, L.P. · CIK 0002026053 · Director · 10% owner

Pershing Square Holdco GP, LLC · CIK 0002027508 · Director · 10% owner

Pershing Square Management, LLC · CIK 0002027456 · Director · 10% owner

ACKMAN WILLIAM A · CIK 0001056513 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 90,875

F1 · shares: Reflects a transfer of the Subject Securities (as defined below) from PSLP (as defined below) to PS Redemption, L.P. ("RedemptionCo"), which was formed for the purpose of giving effect to the special redemption of certain limited partner interests of PSLP in connection with a special redemption opportunity that was consummated on April 21, 2026.

F2 · price: The closing price of the Issuer's Common Stock on April 21, 2026.

F3 · ownership.nature: In addition to Pershing Square Capital Management, L.P., a Delaware limited partnership ("PSCM"), this Form 4 is being filed jointly by Pershing Square Holdco, L.P., a Delaware limited partnership ("PS Holdco"), Pershing Square Holdco GP, LLC, a Delaware limited liability company ("PS Holdco GP"), Pershing Square Management, LLC, a Delaware limited liability company ("ManagementCo"), and William A. Ackman, a citizen of the United States of America (collectively, the "Reporting Persons"), each of whom has the same business address as PSCM and may be deemed to beneficially own the securities reported on this Form 4 (the "Subject Securities").

F4 · ownership.nature: PSCM advises the accounts of Pershing Square, L.P., a Delaware limited partnership ("PSLP"), Pershing Square International, Ltd., a Cayman Islands exempted company ("PSI"), and Pershing Square Holdings, Ltd., a limited liability company incorporated in Guernsey ("PSH" and together with PSLP and PSI, the "Pershing Square Affiliated Funds") and RedemptionCo.

F5 · ownership.nature: (A) PSCM, as the investment adviser to the Pershing Square Affiliated Funds and RedemptionCo, (B) PS Holdco, as the indirect 100% holding company of PSCM, (C) PS Holdco GP, as the sole general partner of PS Holdco and (D) ManagementCo, as the sole member of PS Holdco GP, may each be deemed to be the beneficial owner of the Subject Securities for purposes of Rule 16a-1(a) under the Securities Exchange Act of 1934 (the "Exchange Act"). By virtue of Mr. Ackman's position as (i) the Chief Executive Officer of PSCM, (ii) a director of PS Holdco GP and (iii) a member of ManagementCo, Mr. Ackman may be deemed to be the beneficial owner of the Subject Securities for purposes of Rule 16a-1(a) under the Exchange Act. Each of the Reporting Persons disclaims any beneficial ownership of any of the Subject Securities, except to the extent of any pecuniary interest therein.

F6 · ownership.nature: Anthony F. Massaro, a member of the board of directors of the Issuer of the Subject Securities, was appointed to that board as a representative of PSCM, the other Reporting Persons and the Pershing Square Affiliated Funds. As a result, each of those persons are directors by deputization for purposes of Section 16 of the Exchange Act.

F8 · ownership.nature: These Subject Securities are held by RedemptionCo.

SEC source: 0001140361-26-016488 · form4.xml · nonDerivative · entry 1

Pershing Square Capital Management, L.P. · CIK 0001336528 · Director · 10% owner

PERSHING SQUARE HOLDCO, L.P. · CIK 0002026053 · Director · 10% owner

Pershing Square Holdco GP, LLC · CIK 0002027508 · Director · 10% owner

Pershing Square Management, LLC · CIK 0002027456 · Director · 10% owner

ACKMAN WILLIAM A · CIK 0001056513 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 4,932,905

F1 · shares: Reflects a transfer of the Subject Securities (as defined below) from PSLP (as defined below) to PS Redemption, L.P. ("RedemptionCo"), which was formed for the purpose of giving effect to the special redemption of certain limited partner interests of PSLP in connection with a special redemption opportunity that was consummated on April 21, 2026.

F2 · price: The closing price of the Issuer's Common Stock on April 21, 2026.

F3 · ownership.nature: In addition to Pershing Square Capital Management, L.P., a Delaware limited partnership ("PSCM"), this Form 4 is being filed jointly by Pershing Square Holdco, L.P., a Delaware limited partnership ("PS Holdco"), Pershing Square Holdco GP, LLC, a Delaware limited liability company ("PS Holdco GP"), Pershing Square Management, LLC, a Delaware limited liability company ("ManagementCo"), and William A. Ackman, a citizen of the United States of America (collectively, the "Reporting Persons"), each of whom has the same business address as PSCM and may be deemed to beneficially own the securities reported on this Form 4 (the "Subject Securities").

F4 · ownership.nature: PSCM advises the accounts of Pershing Square, L.P., a Delaware limited partnership ("PSLP"), Pershing Square International, Ltd., a Cayman Islands exempted company ("PSI"), and Pershing Square Holdings, Ltd., a limited liability company incorporated in Guernsey ("PSH" and together with PSLP and PSI, the "Pershing Square Affiliated Funds") and RedemptionCo.

F5 · ownership.nature: (A) PSCM, as the investment adviser to the Pershing Square Affiliated Funds and RedemptionCo, (B) PS Holdco, as the indirect 100% holding company of PSCM, (C) PS Holdco GP, as the sole general partner of PS Holdco and (D) ManagementCo, as the sole member of PS Holdco GP, may each be deemed to be the beneficial owner of the Subject Securities for purposes of Rule 16a-1(a) under the Securities Exchange Act of 1934 (the "Exchange Act"). By virtue of Mr. Ackman's position as (i) the Chief Executive Officer of PSCM, (ii) a director of PS Holdco GP and (iii) a member of ManagementCo, Mr. Ackman may be deemed to be the beneficial owner of the Subject Securities for purposes of Rule 16a-1(a) under the Exchange Act. Each of the Reporting Persons disclaims any beneficial ownership of any of the Subject Securities, except to the extent of any pecuniary interest therein.

F6 · ownership.nature: Anthony F. Massaro, a member of the board of directors of the Issuer of the Subject Securities, was appointed to that board as a representative of PSCM, the other Reporting Persons and the Pershing Square Affiliated Funds. As a result, each of those persons are directors by deputization for purposes of Section 16 of the Exchange Act.

F7 · ownership.nature: These Subject Securities are held by the Pershing Square Affiliated Funds.

SEC source: 0001663789-26-000007 · form4-04032026_040401.xml · nonDerivative · entry 1

PARTRIDGE MATTHEW MORRIS · CIK 0001663789 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 115,615

F1 · kind: On April 1, 2026, Seaport Entertainment Group Inc. (the "Issuer") withheld 4,918 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.

SEC source: 0001816348-26-000003 · form4-03172026_040308.xml · nonDerivative · entry 1

Crawford Michael Anthony · CIK 0001816348 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,218

F1 · shares: The common stock was granted under the Seaport Entertainment Group Inc. 2024 Equity Incentive Plan, pursuant to the Seaport Entertainment Group Inc. Independent Director Compensation Program.

SEC source: 0001753207-26-000002 · form4-03172026_040306.xml · nonDerivative · entry 1

Digilio Monica S · CIK 0001753207 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,218

F1 · shares: The common stock was granted under the Seaport Entertainment Group Inc. 2024 Equity Incentive Plan, pursuant to the Seaport Entertainment Group Inc. Independent Director Compensation Program.

SEC source: 0001848554-26-000002 · form4-03172026_040304.xml · nonDerivative · entry 1

Hirsh David Z. · CIK 0001848554 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,218

F1 · shares: The common stock was granted under the Seaport Entertainment Group Inc. 2024 Equity Incentive Plan, pursuant to the Seaport Entertainment Group Inc. Independent Director Compensation Program.

SEC source: 0002081265-26-000005 · form4-03092026_040311.xml · nonDerivative · entry 1

Sachs Rebecca E. · CIK 0002081265 · Chief People Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,400

F1 · kind: On March 6, 2026, Seaport Entertainment Group Inc. (the "Issuer") withheld 684 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.

SEC source: 0001663789-26-000005 · form4-03092026_040309.xml · nonDerivative · entry 1

PARTRIDGE MATTHEW MORRIS · CIK 0001663789 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 120,533

F1 · kind: On March 6, 2026, Seaport Entertainment Group Inc. (the "Issuer") withheld 2,726 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.

SEC source: 0001615708-26-000006 · form4-03092026_040307.xml · nonDerivative · entry 1

Fato Luciana · CIK 0001615708 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,212

F1 · kind: On March 6, 2026, Seaport Entertainment Group Inc. (the "Issuer") withheld 728 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.

SEC source: 0002081265-26-000003 · form4-03022026_040319.xml · nonDerivative · entry 2

Sachs Rebecca E. · CIK 0002081265 · Chief People Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,084

F2 · kind: On February 27, 2026, the Issuer withheld 987 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 Plan.

SEC source: 0002027972-26-000003 · form4-03022026_040317.xml · nonDerivative · entry 2

Elaiwat Lenah · CIK 0002027972 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,454

F2 · kind: On February 27, 2026, the Issuer withheld 914 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 Plan.

SEC source: 0002081265-26-000003 · form4-03022026_040319.xml · nonDerivative · entry 1

Sachs Rebecca E. · CIK 0002081265 · Chief People Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,071

F1 · shares: Represents restricted stock units ("RSUs") granted to the Reporting Person pursuant to Seaport Entertainment Group Inc.'s (the "Issuer") 2024 Equity Incentive Plan (the "Plan"). Each RSU represents a contingent right to receive one share of the Issuer's common stock. 1,009 RSUs vest on February 27, 2027 and 6,849 RSUs vest in three substantially equal annual installments beginning on February 27, 2027, subject to the Reporting Person's continued service with the Issuer or its subsidiaries through such date.

SEC source: 0002027972-26-000003 · form4-03022026_040317.xml · nonDerivative · entry 1

Elaiwat Lenah · CIK 0002027972 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,368

F1 · shares: Represents restricted stock units ("RSUs") granted to the Reporting Person pursuant to Seaport Entertainment Group Inc.'s (the "Issuer") 2024 Equity Incentive Plan (the "Plan"). Each RSU represents a contingent right to receive one share of the Issuer's common stock. 1,996 RSUs vest on February 27, 2027 and 7,770 RSUs vest in three substantially equal annual installments beginning on February 27, 2027, subject to the Reporting Person's continued service with the Issuer or its subsidiaries through such date.

SEC source: 0001663789-26-000003 · form4-03022026_040322.xml · derivative · entry 2

PARTRIDGE MATTHEW MORRIS · CIK 0001663789 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,148

Underlying: Common Stock · 55,148 shares

Expires 2036-02-26

F2 · derivative.exercise_date: The options vest in four substantially equal annual installments beginning on February 26, 2027, subject to the Reporting Person's continued service with the Issuer or its subsidiaries through such date.

SEC source: 0001663789-26-000003 · form4-03022026_040322.xml · nonDerivative · entry 1

PARTRIDGE MATTHEW MORRIS · CIK 0001663789 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 123,259

F1 · shares: Represents restricted stock units ("RSUs") granted to the Reporting Person pursuant to Seaport Entertainment Group Inc.'s (the "Issuer") 2024 Equity Incentive Plan (the "Plan"). Each RSU represents a contingent right to receive one share of the Issuer's common stock. The RSUs vest in three substantially equal annual installments beginning on February 27, 2027, subject to the Reporting Person's continued service with the Issuer or its subsidiaries through such date.

SEC source: 0001615708-26-000004 · form4-03022026_040321.xml · nonDerivative · entry 1

Fato Luciana · CIK 0001615708 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,940

F1 · shares: Represents restricted stock units ("RSUs") granted to the Reporting Person pursuant to Seaport Entertainment Group Inc.'s (the "Issuer") 2024 Equity Incentive Plan (the "Plan"). Each RSU represents a contingent right to receive one share of the Issuer's common stock. 1,897 RSUs vest on February 27, 2027 and 6,230 RSUs vest in three substantially equal annual installments beginning on February 27, 2027, subject to the Reporting Person's continued service with the Issuer or its subsidiaries through such date.

SEC source: 0001816348-25-000005 · form4-12172025_041206.xml · nonDerivative · entry 1

Crawford Michael Anthony · CIK 0001816348 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,043

F1 · shares: The common stock was granted under the Seaport Entertainment Group Inc. 2024 Equity Incentive Plan, pursuant to the Seaport Entertainment Group Inc. Independent Director Compensation Program.

SEC source: 0001753207-25-000006 · form4-12172025_041204.xml · nonDerivative · entry 1

Digilio Monica S · CIK 0001753207 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,043

F1 · shares: The common stock was granted under the Seaport Entertainment Group Inc. 2024 Equity Incentive Plan, pursuant to the Seaport Entertainment Group Inc. Independent Director Compensation Program.

SEC source: 0001848554-25-000006 · form4-12172025_041201.xml · nonDerivative · entry 1

Hirsh David Z. · CIK 0001848554 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,043

F1 · shares: The common stock was granted under the Seaport Entertainment Group Inc. 2024 Equity Incentive Plan, pursuant to the Seaport Entertainment Group Inc. Independent Director Compensation Program.

SEC source: 0002027972-25-000004 · form4-12032025_041201.xml · nonDerivative · entry 1

Elaiwat Lenah · CIK 0002027972 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,602

F1 · shares: Represents restricted stock units ("RSUs") granted to the Reporting Person under the Issuer's 2024 Equity Incentive Plan. Each RSU represents a contingent right to receive one share of the Issuer's common stock. The RSUs vest in three substantially equal annual installments beginning on December 1, 2026, subject to the Reporting Person's continued service with the Issuer or its subsidiaries through such date.

SEC source: 0001663789-25-000004 · form4-09192025_040901.xml · derivative · entry 2

PARTRIDGE MATTHEW MORRIS · CIK 0001663789 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,189

Underlying: Common Stock · 22,189 shares

Expires 2035-09-18

F2 · derivative.exercise_date: The options vest in four substantially equal annual installments beginning on September 18, 2026, subject to the Reporting Person's continued service with the Issuer or its subsidiaries through such date.

SEC source: 0001663789-25-000004 · form4-09192025_040901.xml · nonDerivative · entry 1

PARTRIDGE MATTHEW MORRIS · CIK 0001663789 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 95,634

F1 · shares: Represents restricted stock units ("RSUs") granted to the Reporting Person under the Issuer's 2024 Equity Incentive Plan. Each RSU represents a contingent right to receive one share of the Issuer's common stock. The RSUs vest in three substantially equal annual installments beginning on September 18, 2026, subject to the Reporting Person's continued service with the Issuer or its subsidiaries through such date.

SEC source: 0001816348-25-000003 · form4-09172025_040905.xml · nonDerivative · entry 1

Crawford Michael Anthony · CIK 0001816348 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,897

F1 · shares: The common stock was granted under the Seaport Entertainment Group Inc. 2024 Equity Incentive Plan, pursuant to the Seaport Entertainment Group Inc. Independent Director Compensation Program.

SEC source: 0001753207-25-000004 · form4-09172025_040903.xml · nonDerivative · entry 1

Digilio Monica S · CIK 0001753207 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,897

F1 · shares: The common stock was granted under the Seaport Entertainment Group Inc. 2024 Equity Incentive Plan, pursuant to the Seaport Entertainment Group Inc. Independent Director Compensation Program.

SEC source: 0001848554-25-000004 · form4-09172025_040901.xml · nonDerivative · entry 1

Hirsh David Z. · CIK 0001848554 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,897

F1 · shares: The common stock was granted under the Seaport Entertainment Group Inc. 2024 Equity Incentive Plan, pursuant to the Seaport Entertainment Group Inc. Independent Director Compensation Program.

SEC source: 0001415889-25-020965 · form4-08042025_040801.xml · nonDerivative · entry 1

Elaiwat Lenah · CIK 0002027972 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,337

F1 · kind: On August 1, 2025, Seaport Entertainment Group Inc. (the "Issuer") withheld 1,152 shares of common stock ("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.

SEC source: 0001415889-25-020967 · form4-08042025_040806.xml · nonDerivative · entry 1

Fato Luciana · CIK 0001615708 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,813

F1 · kind: On August 1, 2025, Seaport Entertainment Group Inc. (the "Issuer") withheld 1,073 shares of common stock ("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.

SEC source: 0001415889-25-020966 · form4-08042025_040804.xml · nonDerivative · entry 1

PARTRIDGE MATTHEW MORRIS · CIK 0001663789 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 82,079

F1 · kind: On August 1, 2025, Seaport Entertainment Group Inc. (the "Issuer") withheld 5,429 shares of common stock ("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.

SEC source: 0001415889-25-018391 · form4-06272025_040619.xml · nonDerivative · entry 1

Hirsh David Z. · CIK 0001848554 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,899

F1 · shares: The common stock was granted under the Seaport Entertainment Group Inc. 2024 Equity Incentive Plan, pursuant to the Seaport Entertainment Group Inc. Independent Director Compensation Program.

SEC source: 0001415889-25-018390 · form4-06272025_040617.xml · nonDerivative · entry 1

Digilio Monica S · CIK 0001753207 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,899

F1 · shares: The common stock was granted under the Seaport Entertainment Group Inc. 2024 Equity Incentive Plan, pursuant to the Seaport Entertainment Group Inc. Independent Director Compensation Program.

SEC source: 0001415889-25-018389 · form4-06272025_040616.xml · nonDerivative · entry 1

Crawford Michael Anthony · CIK 0001816348 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,899

F1 · shares: The common stock was granted under the Seaport Entertainment Group Inc. 2024 Equity Incentive Plan, pursuant to the Seaport Entertainment Group Inc. Independent Director Compensation Program.

SEC source: 0001415889-25-019851 · form4-07162025_040701.xml · nonDerivative · entry 1

PARTRIDGE MATTHEW MORRIS · CIK 0001663789 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 87,508

F1 · kind: On April 1, 2025, Seaport Entertainment Group Inc. (the "Issuer") withheld 4,440 shares of common stock ("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.

SEC source: 0001415889-25-008595 · form4-03192025_050305.xml · nonDerivative · entry 1

Digilio Monica S · CIK 0001753207 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,620

F1 · shares: The common stock was granted under the Seaport Entertainment Group Inc. 2024 Equity Incentive Plan, pursuant to the Seaport Entertainment Group Inc. Independent Director Compensation Program.

SEC source: 0001415889-25-008594 · form4-03192025_050303.xml · nonDerivative · entry 1

Crawford Michael Anthony · CIK 0001816348 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,620

F1 · shares: The common stock was granted under the Seaport Entertainment Group Inc. 2024 Equity Incentive Plan, pursuant to the Seaport Entertainment Group Inc. Independent Director Compensation Program.

SEC source: 0001415889-25-008596 · form4-03192025_050308.xml · nonDerivative · entry 1

Hirsh David Z. · CIK 0001848554 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,620

F1 · shares: The common stock was granted under the Seaport Entertainment Group Inc. 2024 Equity Incentive Plan, pursuant to the Seaport Entertainment Group Inc. Independent Director Compensation Program.

SEC source: 0001415889-25-007672 · form4-03112025_040305.xml · nonDerivative · entry 1

PARTRIDGE MATTHEW MORRIS · CIK 0001663789 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 91,948

F1 · shares: Represents restricted stock units ("RSUs") granted to the Reporting Person. Each RSU represents a contingent right to receive one share of the Issuer's common stock. The RSUs vest in three substantially equal installments beginning on March 7, 2026, subject to the Reporting Person's continued service with the Issuer or its subsidiaries through such date.

SEC source: 0001415889-25-007671 · form4-03112025_040302.xml · nonDerivative · entry 1

Fato Luciana · CIK 0001615708 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,886

F1 · shares: Represents restricted stock units ("RSUs") granted to the Reporting Person. Each RSU represents a contingent right to receive one share of the Issuer's common stock. The RSUs vest in three substantially equal installments beginning on March 7, 2026, subject to the Reporting Person's continued service with the Issuer or its subsidiaries through such date.

SEC source: 0001415889-25-006498 · form4-03042025_090318.xml · nonDerivative · entry 1

Elaiwat Lenah · CIK 0002027972 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,489

F1 · shares: Represents restricted stock units ("RSUs") granted to the Reporting Person pursuant to the Issuer's 2024 Equity Incentive Plan (the "Plan"). Each RSU represents a contingent right to receive one share of the Issuer's common stock. The RSUs vest in three substantially equal installments beginning on February 27, 2026, subject to the Reporting Person's continued service with the Issuer or its subsidiaries through such date.

SEC source: 0001415889-25-019852 · form4-07162025_040703.xml · nonDerivative · entry 1

Nikodemus Anton D. · CIK 0001996902 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 191,879

F1 · kind: On December 29, 2024, Seaport Entertainment Group Inc. (the "Issuer") withheld 8,935 shares of common stock ("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.

SEC source: 0001415889-24-029981 · form4-12202024_051203.xml · nonDerivative · entry 1

Crawford Michael Anthony · CIK 0001816348 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,410

F1 · shares: The common stock was granted under the Seaport Entertainment Group Inc. 2024 Equity Incentive Plan, pursuant to the Seaport Entertainment Group Inc. Independent Director Compensation Program.