Seaport Entertainment Group Inc.
Seaport Entertainment Group Inc. (SEG) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · SEG · as of Sep 30, 2025
Ownership Breakdown
103
Institutional Holders
▼ 3 vs Q2
$227.12M
Total Inst. Value
▲ $61.98M vs Q2
12.80M
Shares Outstanding
freeFloat 96.98%
9.91M
13F Shares Held
▲ 1.06M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
SEG largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
PERSHING SQUARE CAPITAL MANAGEMENT, L.P. services-miscellaneous amusement & recreation | 5.02M | 39.57% | 39.57% | $115.15B | Nov 14, 2025 | — held |
KAHN BROTHERS GROUP INC services-miscellaneous amusement & recreation | 583.4K | 4.60% | 4.60% | $13.37B | Nov 12, 2025 | NEW |
DIMENSIONAL FUND ADVISORS LP services-miscellaneous amusement & recreation | 579.3K | 4.56% | 4.56% | $13.28B | Nov 12, 2025 | ▼ 4.0K |
RUBRIC CAPITAL MANAGEMENT LP services-miscellaneous amusement & recreation | 568.5K | 4.48% | 4.48% | $13.03B | Nov 14, 2025 | — held |
BLACKROCK, INC. services-miscellaneous amusement & recreation | 523.5K | 4.12% | 4.12% | $12.00B | Nov 12, 2025 | ▲ 6.6K |
VANGUARD GROUP INC services-miscellaneous amusement & recreation | 460.5K | 3.63% | 3.63% | $10.56B | Nov 7, 2025 | ▼ 8.6K |
CERITY PARTNERS LLC services-miscellaneous amusement & recreation | 259.9K | 2.05% | 2.05% | $5.96B | Oct 22, 2025 | NEW |
SOLAS CAPITAL MANAGEMENT, LLC services-miscellaneous amusement & recreation | 232.2K | 1.83% | 1.83% | $5.32B | Nov 14, 2025 | NEW |
GEODE CAPITAL MANAGEMENT, LLC services-miscellaneous amusement & recreation | 184.1K | 1.45% | 1.45% | $4.22B | Nov 12, 2025 | ▼ 1.9K |
STATE STREET CORP services-miscellaneous amusement & recreation | 179.4K | 1.41% | 1.41% | $4.11B | Nov 14, 2025 | ▲ 11.8K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
15
Increased
+171.0K shares6
New Positions
first time holders22
Decreased
−121.3K shares0
Sold Out
fully exitedNet shares change (top 50)
+49.7K
+171.0K / −121.3K
Net new holders
-1
6 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
SEG insider trading · insider activity
Source: SEC Form 4
1
Buy transactions
2
Sell transactions
0.50
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Pershing Square Capital Management, L.P.
| Apr 21, 2026 | J-Other | 90,875 | $22.25 | $2.02M | 4.93M | Form 4 ↗ |
Pershing Square Capital Management, L.P.
| Apr 21, 2026 | J-Other | 90,875 | $22.25 | $2.02M | 90.9K | Form 4 ↗ |
PARTRIDGE MATTHEW MORRIS Chief Executive Officer | Apr 1, 2026 | Tax Withhold | 4,918 | $21.46 | $105.5K | 115.6K | Form 4 ↗ |
Crawford Michael Anthony director | Mar 16, 2026 | Award | 1,175 | — | — | 7.2K | Form 4 ↗ |
Digilio Monica S director | Mar 16, 2026 | Award | 1,175 | — | — | 7.2K | Form 4 ↗ |
Hirsh David Z. director | Mar 16, 2026 | Award | 1,175 | — | — | 7.2K | Form 4 ↗ |
Sachs Rebecca E. Chief People Officer | Mar 6, 2026 | Tax Withhold | 684 | $21.64 | $14.8K | 23.4K | Form 4 ↗ |
PARTRIDGE MATTHEW MORRIS Chief Executive Officer | Mar 6, 2026 | Tax Withhold | 2,726 | $21.64 | $59.0K | 120.5K | Form 4 ↗ |
Fato Luciana General Counsel | Mar 6, 2026 | Tax Withhold | 728 | $21.64 | $15.8K | 19.2K | Form 4 ↗ |
PARTRIDGE MATTHEW MORRIS Chief Executive Officer | Feb 26, 2026 | Award | 27,625 | — | — | 123.3K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Seaport Entertainment Group Inc. (SEG) is primarily owned by institutional investors, who hold approximately 77.4% of total shares outstanding. Company insiders own approximately 3.02%, while retail and public investors account for the remaining 19.57%.
The largest institutional shareholder of Seaport Entertainment Group Inc. is PERSHING SQUARE CAPITAL MANAGEMENT, L.P., holding approximately 5.02 million shares — equal to 39.57% of outstanding shares — as of September 30, 2025.
A total of 103 institutional investors currently hold SEG stock, with a combined institutional value of approximately $227,119,417 as of the most recent 13F filing period.
Frequently asked questions
SEG ownershipSeaport Entertainment Group Inc. (SEG) is primarily owned by institutional investors, who hold approximately 77.4% of shares. The largest shareholder is PERSHING SQUARE CAPITAL MANAGEMENT, L.P. with a 39.57% stake. Company insiders hold 3.02%. Data sourced from SEC Form 13F as of September 30, 2025.