Activist · CIK 0001336528
Bill Ackman
Pershing Square
Bill Ackman runs Pershing Square, an activist overseeing $15.53B in disclosed equity holdings (SEC CIK 0001336528). The latest portfolio (2025Q4) discloses 11 positions across 6 sectors, with the largest positions in BN, UBER and AMZN. On a mark-to-market basis the tracked portfolio has returned 115.0% since 2016Q1. OpenStocks tracks 40 consecutive quarterly snapshots for this manager — every position change, new entry, and exit is logged below.
Portfolio
$15.53B
Positions
11
Quarter
2025Q4
Filings tracked
40
5Y+23.5%Full performance →
Holdings
Sorted by value · 2023Q3
8 positions
Number of shares
953,608 sh
Holdings current value
$1.75B
Avg closing price
$71.95
-51.2%
Last action
Exited
2025Q4
Current $35.08
Number of shares
23,348,135 sh
Holdings current value
$1.56B
Avg closing price
$44.61
+74.0%
Last action
Trimmed 0.2%
2025Q4
Current $77.61
Number of shares
10,305,500 sh
Holdings current value
$1.55B
Avg closing price
$80.29
+311.5%
Last action
Trimmed 0.0%
2025Q4
Current $330.38
Number of shares
7,066,623 sh
Holdings current value
$1.47B
Avg closing price
$94.47
Last action
Exited
2024Q1
Current —
Number of shares
16,806,908 sh
Holdings current value
$1.25B
Avg closing price
$75.37
Last action
New holding
2025Q1
Current —
Number of shares
9,377,195 sh
Holdings current value
$1.24B
Avg closing price
$106.37
+212.9%
Last action
Trimmed 1.7%
2025Q4
Current $332.77
Number of shares
15,095,528 sh
Holdings current value
$1.12B
Avg closing price
$80.77
-0.8%
Last action
Exited
2025Q2
Current $80.14
Number of shares
4,354,824 sh
Holdings current value
$569.87M
Avg closing price
$130.57
+157.4%
Last action
Trimmed 48.9%
2025Q4
Current $336.02
Portfolio heatmap
Box size = % of portfolio · color = return since filing
Sector exposure
Share of dollar value across the latest reported portfolio. Unclassified positions excluded.
- Consumer Cyclical4 pos$6.32B60.2%
- Communication Services2 pos$1.81B17.2%
- Real Estate1 pos$1.25B11.9%
- Industrials1 pos$1.12B10.7%