Seaport Entertainment's three largest insider shareholders as of September 09, 2026 are Square Capital Management, L.P. Pershing (Director, 5.02Mn shares), Square Capital Management, L.P. Pershing (Director, 5.02Mn shares), Anton D. Nikodemus (Chief Executive Officer, 200.81K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Anton D. Nikodemus | Chief Executive Officer | 200,814 | 0 | 200,814 | 40.3% | 16 Sep, 2024 |
| 2 | Matthew Morris Partridge | Chief Executive Officer | 111,071 | 0 | 111,071 | 22.3% | 03 Aug, 2026 |
| 3 | Square Capital Management, L.P. Pershing | Director, TenPercentOwner | 0 | 90,875 | 90,875 | 18.2% | 23 Apr, 2026 |
| 4 | Lenah Elaiwat | Chief Financial Officer | 30,713 | 0 | 30,713 | 6.2% | 03 Aug, 2026 |
| 5 | Rebecca E. Sachs | Chief People Officer | 23,400 | 0 | 23,400 | 4.7% | 09 Mar, 2026 |
| 6 | Luciana Fato | General Counsel | 19,212 | 0 | 19,212 | 3.9% | 09 Mar, 2026 |
| 7 | Monica S Digilio | Director | 8,232 | 0 | 8,232 | 1.7% | 15 Jun, 2026 |
| 8 | David Z. Hirsh | Director | 7,218 | 0 | 7,218 | 1.4% | 17 Mar, 2026 |
| 9 | Michael Anthony Crawford | Director | 7,218 | 0 | 7,218 | 1.4% | 17 Mar, 2026 |
| 10 | Anthony F Massaro | Director | 33 | 0 | 33 | 0.0% | 22 Oct, 2024 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 31 Jul, 2026 | Lenah Elaiwat | Chief Financial Officer | Disposed F | 741 | $26.23 | $19.44K | 30,713 | Direct |
| 31 Jul, 2026 | Matthew Morris Partridge | Chief Executive Officer | Disposed F | 4,544 | $26.23 | $119.19K | 111,071 | Direct |
| 15 Jun, 2026 | Monica S Digilio | Director | Acquired A | 1,014 | $0.00 | $0 | 8,232 | Direct |
| 21 Apr, 2026 | Square Capital Management, L.P. Pershing | Director, TenPercentOwner | Disposed J | 90,875 | $22.25 | $2.02Mn | 4,932,905 | Indirect |
| 21 Apr, 2026 | Square Capital Management, L.P. Pershing | Director, TenPercentOwner | Acquired J | 90,875 | $22.25 | $2.02Mn | 90,875 | Indirect |
| 01 Apr, 2026 | Matthew Morris Partridge | Chief Executive Officer | Disposed F | 4,918 | $21.46 | $105.54K | 115,615 | Direct |
| 16 Mar, 2026 | David Z. Hirsh | Director | Acquired A | 1,175 | $0.00 | $0 | 7,218 | Direct |
| 16 Mar, 2026 | Michael Anthony Crawford | Director | Acquired A | 1,175 | $0.00 | $0 | 7,218 | Direct |
| 16 Mar, 2026 | Monica S Digilio | Director | Acquired A | 1,175 | $0.00 | $0 | 7,218 | Direct |
| 06 Mar, 2026 | Matthew Morris Partridge | Chief Executive Officer | Disposed F | 2,726 | $21.64 | $58.99K | 120,533 | Direct |
| 06 Mar, 2026 | Luciana Fato | General Counsel | Disposed F | 728 | $21.64 | $15.75K | 19,212 | Direct |
| 06 Mar, 2026 | Rebecca E. Sachs | Chief People Officer | Disposed F | 684 | $21.64 | $14.80K | 23,400 | Direct |
| 26 Feb, 2026 | Matthew Morris Partridge | Chief Executive Officer | Acquired A | 27,625 | $0.00 | $0 | 123,259 | Direct |
| 26 Feb, 2026 | Lenah Elaiwat | Chief Financial Officer | Acquired A | 9,766 | $0.00 | $0 | 32,368 | Direct |
| 26 Feb, 2026 | Rebecca E. Sachs | Chief People Officer | Acquired A | 7,858 | $0.00 | $0 | 25,071 | Direct |
| 26 Feb, 2026 | Luciana Fato | General Counsel | Acquired A | 8,127 | $0.00 | $0 | 19,940 | Direct |
| 27 Feb, 2026 | Lenah Elaiwat | Chief Financial Officer | Disposed F | 914 | $23.36 | $21.35K | 31,454 | Direct |
| 26 Feb, 2026 | Matthew Morris Partridge | Chief Executive Officer | Acquired A | 55,148 | $0.00 | $0 | 55,148 | Direct |
| 27 Feb, 2026 | Rebecca E. Sachs | Chief People Officer | Disposed F | 987 | $23.36 | $23.06K | 24,084 | Direct |
| 15 Dec, 2025 | Monica S Digilio | Director | Acquired A | 1,146 | $0.00 | $0 | 6,043 | Direct |