Bill Ackman
SEG icon

Bill Ackman’s Seaport Entertainment Group SEG Stock Holding History

Bill Ackman’s Portfolio SEG Stock Details SEG Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$134M Hold
5,023,780
– – 0.69% 13
2026
Q1 		$108M Hold
5,023,780
– – 0.79% 8
2025
Q4 		$99.3M Hold
5,023,780
– – 0.64% 10
2025
Q3 		$115M Hold
5,023,780
– – 0.79% 10
2025
Q2 		$93.7M Hold
5,023,780
– – 0.68% 11
2025
Q1 		$108M Hold
5,023,780
– – 0.9% 10
2024
Q4 		$140M Buy
5,023,780
+2,929,107
+140% +$84.4M 1.11% 10
2024
Q3 		$57.4M Buy
+2,094,673
New +$59.6M 0.44% 10

Other funds holding SEG

Kahn Brothers Group
Kahn Brothers Group New York $633M AUM 39.01% 1-Year Est. Return
GCCM
Gate City Capital Management Chicago, Illinois $386M AUM 142.77% 1-Year Est. Return
Rubric Capital Management (New York)
Rubric Capital Management (New York) New York $10.9B AUM 70.31% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Cerity Partners
Cerity Partners New York $82.7B AUM 28.53% 1-Year Est. Return
SCM
Solas Capital Management Darien, Connecticut $187M AUM 12.91% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Bill Ackman's SEG Position: Q2 2026 in Review

Bill Ackman held its Seaport Entertainment Group (SEG) position steady in Q2 2026 at 5,023,780 shares worth $134M. The position accounts for 0.69% of the portfolio, ranked #13.

Bill Ackman first reported a position in SEG in Q3 2024 and has held it in 8 quarters since. The position peaked at $140M in Q4 2024. 116 funds tracked by Wall St. Rank hold SEG as of Q2 2026.

  • Bill Ackman held 5,023,780 shares of Seaport Entertainment Group worth $134M as of Q2 2026.
  • Bill Ackman left its Seaport Entertainment Group share count unchanged in Q2 2026.
  • Seaport Entertainment Group made up 0.69% of Bill Ackman's portfolio in Q2 2026, its #13 holding.
  • Bill Ackman first reported a position in Seaport Entertainment Group in Q3 2024 and has held it in 8 quarters since.
  • Bill Ackman's Seaport Entertainment Group position peaked at $140M in Q4 2024.
  • 116 funds tracked by Wall St. Rank held Seaport Entertainment Group as of Q2 2026.

Based on Pershing Square Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.