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Head-to-head comparison

Bill Ackman vs Seth Klarman

Pershing Square Capital

Q8/10

"Concentrated bets on high-quality businesses with activist catalysts."

8 positionsSince 2004

Baupost Group

Q9/10

"Margin of safety. Cash is a position. Patience pays."

6 positionsSince 1982

Recent moves — Q4 2025

Latest quarter activity for each manager.

Bill Ackman

UBERADD +35%
Heavy add on the autonomous vehicle optionality.
NKEADD +20%
Doubling down on the Nike turnaround thesis.
BNADD +10%
Building Brookfield position.
HHHREDUCE -4%
Small trim on Howard Hughes.

Seth Klarman

GOOGADD +40%
Building out new Alphabet position.
VSTADD +25%
Aggressive Vistra add — AI data center demand thesis.
WBDREDUCE -12%
Continued Warner Bros. profit-taking.

Data sourced from 13F filings with the SEC. Overlap in top positions is a concrete consensus signal, not investment advice.