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 →
Biggest winner since filing
GOOGALPHABET INC
+212.9%
+$1.43B
Biggest loser since filing
CMGCHIPOTLE MEXICAN GRILL INC
-51.2%
−$794.3M
Investment strategy
Bill Ackman is a large fund with a concentrated portfolio. Top 3 positions are 49% of the equity book.
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<iframe src="https://openstocks.me/embed/stock/UBER" width="100%" height="480" frameborder="0" loading="lazy" title="UBER chart by OpenStocks" style="border:0;border-radius:12px;background:transparent"></iframe>Holdings
6 sectors11 positions
Top 3 = 49% of book · UBER, BN, QSR
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Performance
vs SPY40 quarters tracked
Mark-to-market portfolio growth vs SPY benchmark, with AUM and concentration history.
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Options & derivatives
No options
Bill Ackman has no PUT or CALL positions disclosed for this quarter.
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Activity & trades
Quarter-by-quarterLast move 2025Q4
ADD BN — and 4 more recent moves.
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Recent transactions
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SOLD
CHIPOTLE MEXICAN GRILL INC
−21,541,177
~$39.19 · 2025Q4
2026-02-17