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Ken Griffin's Seaport Entertainment Group Inc. (SEG) position

Yes: as of Q1 2026, Ken Griffin holds 26K shares of SEG worth an amount we cannot price (0.0% of the disclosed portfolio). Last quarter the position was reduced by 67.7%. First disclosed Q3 2024.
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Current value
an amount we cannot price
Shares held
26K
% of portfolio
0.0%
Quarter-end price
No quarter-end price available

Average buy price is hidden here because at least one covered purchase quarter has no usable local mean price.

SEG price vs Griffin's position

Dates
$25.5$26$26.5$27← Earlier —4 purchases, 2 sells
Average closing price · filing quarter
Price range · filing quarter

Every quarterly change

Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Q1 2026 Reduced −54K −67.7% 26K May 15, 2026
Q4 2025 New +80K 80K Feb 17, 2026
Q2 2025 Reduced −10K −20.0% 41K Aug 14, 2025
Q1 2025 Added +34K +197.6% 51K May 15, 2025
Q4 2024 Added +7K +71.0% 17K Feb 14, 2025
Q3 2024 New +10K 10K Nov 14, 2024
Data through Q1 2026 · filed May 15, 2026
6 grouped rows from 6 quarters

Who else owns SEG

Pershing Square Capital Management, L.P.

View investor →
owns 39.2% of shares outstanding
Shares: 5.0M

Kahn Brothers Group Inc

owns 7.0% of shares outstanding
Shares: 893K

Gate City Capital Management, LLC

owns 5.4% of shares outstanding
Shares: 689K

Rubric Capital Management LP

owns 4.4% of shares outstanding
Shares: 569K

See all owners of SEG →

More Griffin positions

Common questions

Does Ken Griffin own SEG?

Yes. As of Q1 2026, Ken Griffin disclosed 26K shares of SEG, worth an amount we cannot price. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Ken Griffin buy SEG?

Ken Griffin first disclosed a SEG position in Q3 2024; every quarterly buy and sell since is in the table above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

Did Ken Griffin sell SEG?

The quarter-by-quarter table above shows each sale and reduction Ken Griffin disclosed in SEG. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How many shares of SEG does Ken Griffin own?

Ken Griffin disclosed 26K shares of SEG as of Q1 2026. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

What price did Ken Griffin pay for SEG?

Ken Griffin began building the SEG position before our 13F history starts, so an exact average buy price cannot be estimated without understating it. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How are the estimated trade prices calculated?

13F filings disclose quarter-end holdings, not trade dates or execution prices. These estimates use each covered quarter's average market price; the add average excludes the opening position and quarters without price data. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.