Seaport Entertainment Group Inc.
Ownership
Ownership Structure
Who owns Seaport Entertainment Group Inc. (SEG)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 57.8% of the shares are freely tradable; institutional investors hold 84.8%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Pershing Square Capital Management, L.P. | 39.22 | 5,023,780 | +0.0 | 03/31/2026 |
| Pershing Square Inc | 39.22 | 5,023,780 | +0.0 | 06/30/2026 |
| Kahn Brothers & CO Inc /DE/ | 7.16 | 917,005 | +2.7 | 06/30/2026 |
| Gate City Capital Management, LLC | 5.65 | 723,248 | +4.9 | 06/30/2026 |
| Rubric Capital Management LP | 4.44 | 568,530 | +0.0 | 06/30/2026 |
| BlackRock Inc | 4.32 | 553,120 | +9.4 | 06/30/2026 |
| Dimensional Fund Advisors, Inc. | 3.10 | 396,566 | -12.9 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 3.00 | 384,200 | +792.2 | 06/30/2026 |
| Vanguard Capital Management, LLC | 2.68 | 343,549 | +4.8 | 06/30/2026 |
| HPM Partners LLC | 2.46 | 314,955 | -1.2 | 06/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Partridge Matthew Morris | Chief Executive Officer | 109,267 | 2,458,508 $ | Sep 18, 2026 | direct |
| Elaiwat Lenah | Chief Financial Officer | 30,713 | 691,043 $ | Jul 31, 2026 | direct |
| Sachs Rebecca E. | Chief Administrative Officer | 22,390 | 503,775 $ | Jul 31, 2026 | direct |
| Hirsh David Z. | Director | 9,219 | 207,428 $ | Sep 15, 2026 | direct |
| Crawford Michael Anthony | Director | 9,219 | 207,428 $ | Sep 15, 2026 | direct |
| Digilio Monica S | Director | 9,219 | 207,428 $ | Sep 15, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 18, 2026 | Partridge Matthew Morris | Chief Executive Officer | Other | 1,804 | 24.14 | 43,549 |
| Sep 15, 2026 | Hirsh David Z. | Director | Other | 987 | 0.00 | – |
| Sep 15, 2026 | Crawford Michael Anthony | Director | Other | 987 | 0.00 | – |
| Sep 15, 2026 | Digilio Monica S | Director | Other | 987 | 0.00 | – |
| Jul 31, 2026 | Sachs Rebecca E. | Chief Administrative Officer | Other | 1,010 | 26.23 | 26,492 |
| Jul 31, 2026 | Elaiwat Lenah | Chief Financial Officer | Other | 741 | 26.23 | 19,436 |
| Jul 31, 2026 | Partridge Matthew Morris | Chief Executive Officer | Other | 4,544 | 26.23 | 119,189 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: October 30, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.