Latest Period
Q1 2026
Security Snapshot
Seaport Entertainment Group Inc. - Common Stock (SEG) Institutional Ownership
CUSIP: 812215200
13F Institutional Holders and Ownership History from Q3 2024 to Q1 2026
Institutions Reporting
116
Shares (Excl. Options)
10,718,450
Price
$21.48
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- Security type / class
- Equity / Common Stock
- Symbol
- SEG on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 10,718,450
- Total 13F value
- $230,214,511
- Portfolio coverage rank
- 0%
- Share change
- +412,404
- Value change
- +$9,160,189
- Number of holders
- 116
- Shares outstanding
- 12,767,537
- SEC-reported price per share
- $24.50
- Insider filing price
- $24.50
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- SEG - Seaport Entertainment Group Inc. - Common Stock is tracked under CUSIP 812215200.
- 116 institutions reported positions in Q1 2026.
- 5 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 112 to 116 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $205,620,897 to $230,214,511.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 116 institutions filings for Q1 2026.
Security key
812215200
Latest holder period
Q1 2026
13F holders
116
13D/G owners
5
CIK / CUSIP context first
Open Q1 2026 holders
SEG full holder history
Seaport Entertainment Group Inc. SEC filings
Seaport Entertainment Group Inc. company facts
Seaport Entertainment Group Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 812215200:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
5
Security
SEG
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| KAHN BROTHERS GROUP INC | 7% | $19,838,572 | 893,227 | KAHN BROTHERS GROUP INC | 08 May 2026 | |||
| GATE CITY CAPITAL MANAGEMENT, LLC | 5.4% | $15,312,618 | 689,447 | Gate City Capital Management, LLC | 31 Mar 2026 | |||
| Rubric Capital Management LP | 4.5% | $11,118,381 | 573,408 | Rubric Capital Management LP | 31 Dec 2024 | |||
| Beryl Capital Management LLC | 2.7% | $6,527,217 | 336,628 | Beryl Capital Management LLC | 31 Dec 2024 | |||
| BlackRock, Inc. | 2.6% | $6,326,879 | 326,296 | BlackRock, Inc. | 31 Dec 2024 |
As of 31 Mar 2026, 116 institutional investors reported holding 10,718,450 shares of Seaport Entertainment Group Inc. - Common Stock (SEG). This represents 84% of the company’s total 12,767,537 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
80%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| Pershing Square Capital Management, L.P. | 39% | 5,023,780 | 0% | 0.79% | $107,910,794 |
| KAHN BROTHERS GROUP INC | 7% | 893,227 | +52% | 3.4% | $19,186,515 |
| GATE CITY CAPITAL MANAGEMENT, LLC | 5.4% | 689,447 | +79% | 5.8% | $14,809,322 |
| Rubric Capital Management LP | 4.5% | 568,530 | 0% | 0.15% | $12,212,024 |
| BlackRock, Inc. | 4% | 505,629 | -1.6% | 0% | $10,860,910 |
| DIMENSIONAL FUND ADVISORS LP | 3.6% | 455,147 | -12% | 0% | $9,776,403 |
| VANGUARD CAPITAL MANAGEMENT LLC | 2.6% | 327,685 | 0% | 0% | $7,038,674 |
| Cerity Partners LLC | 2.5% | 318,919 | +24% | 0.01% | $6,850,380 |
| Solas Capital Management, LLC | 1.7% | 222,918 | -2% | 2.8% | $4,788,279 |
| GEODE CAPITAL MANAGEMENT, LLC | 1.4% | 185,020 | +3.5% | 0% | $3,975,103 |
| STATE STREET CORP | 1.4% | 177,981 | +0.55% | 0% | $3,823,032 |
| Rangeley Capital, LLC | 1.2% | 153,517 | 0% | 3.6% | $3,297,545 |
| GOLDMAN SACHS GROUP INC | 0.82% | 104,196 | +31% | 0% | $2,238,130 |
| Peapod Lane Capital LLC | 0.72% | 92,506 | 1.6% | $1,971,300 | |
| RENAISSANCE TECHNOLOGIES LLC | 0.64% | 82,300 | +124% | 0% | $1,767,804 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.49% | 62,006 | -3.1% | 0% | $1,331,889 |
| NORTHERN TRUST CORP | 0.45% | 57,153 | +7.1% | 0% | $1,227,646 |
| LPL Financial LLC | 0.41% | 52,766 | +46% | 0% | $1,133,414 |
| HORIZON KINETICS ASSET MANAGEMENT LLC | 0.41% | 52,440 | -0.16% | 0.01% | $1,126,411 |
| VANGUARD FIDUCIARY TRUST CO | 0.38% | 48,264 | 0% | 0% | $1,036,711 |
| O'Keefe Stevens Advisory, Inc. | 0.37% | 47,670 | +236% | 0.25% | $1,023,952 |
| LAZARD ASSET MANAGEMENT LLC | 0.37% | 47,468 | +1.8% | 0% | $1,019,613 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 0.34% | 43,062 | 0% | 0% | $924,972 |
| Marnell Management LLC | 0.25% | 32,300 | 0% | 0.46% | $693,804 |
| Gem Investment Advisors, LLC | 0.23% | 29,738 | -23% | 0.63% | $638,772 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
7
Latest
Q1 2026
Rows shown
1-7 of 7
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 10,718,450 | $230,214,511 | +$9,160,189 | $21.48 | 116 |
| 2025 Q4 | 10,388,592 | $205,620,897 | +$7,398,793 | $19.77 | 112 |
| 2025 Q3 | 9,909,150 | $227,119,371 | +$24,961,266 | $22.92 | 99 |
| 2025 Q2 | 8,849,340 | $165,114,567 | -$2,296,937 | $18.65 | 100 |
| 2025 Q1 | 8,934,543 | $191,750,000 | -$18,617,325 | $21.47 | 119 |
| 2024 Q4 | 9,614,168 | $268,653,405 | +$127,098,218 | $27.95 | 124 |
| 2024 Q3 | 4,906,532 | $134,536,957 | +$130,283,123 | $27.42 | 115 |