Seaport Entertainment Group Inc. (SEG) ownership: Top institutional holder: Pershing Square Capital Management, L.P. ($107.91M). Insider activity: Net Seller (5 buys, 15 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| Pershing Square Capital Management, L.P. | 5023780.00 | $107.91M | 2026-03-31 |
| KAHN BROTHERS GROUP INC | 893227.00 | $19.19M | 2026-03-31 |
| GATE CITY CAPITAL MANAGEMENT, LLC | 689447.00 | $14.81M | 2026-03-31 |
| Rubric Capital Management LP | 568530.00 | $12.21M | 2026-03-31 |
| BlackRock, Inc. | 505629.00 | $10.86M | 2026-03-31 |
| DIMENSIONAL FUND ADVISORS LP | 455147.00 | $9.78M | 2026-03-31 |
| VANGUARD GROUP INC | 454191.00 | $8.98M | 2025-12-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 327685.00 | $7.04M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-04-21 | |
| Sell | null | 2026-04-21 | |
| Sell | null | 2026-04-01 | |
| Buy | null | 2026-04-01 | |
| Sell | null | 2026-03-16 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.