Pershing Square Capital Management, L.P.

Background

Bill Ackman founded Pershing Square Capital Management in 2004, and it has since become one of the more closely watched activist hedge fund operations in the US. The firm's approach is deliberately concentrated — typically holding fewer than a dozen names at meaningful weights — and Ackman has a documented history of taking loud public positions on companies he believes are either undervalued or operationally improvable. Past campaigns have included high-profile bets on and against names across consumer, real estate, and financial sectors. The firm manages substantial assets, qualifies as a mega-manager under institutional classification standards, and its 13F filings are followed as much for what they signal about conviction as for the specific positions themselves.

Current Portfolio Signal

Pershing Square's current portfolio is a study in concentration. Eleven disclosed positions account for the entire book, with the top four — BN (17.6%), AMZN (17.4%), UBER (15.7%), and MSFT (15.3%) — collectively representing over 65% of reported holdings. That is a fundamentally different risk profile than anything index-weighted. QSR at 12.2% and META at 11.1% push the top six names past 89% of the portfolio. The remaining positions — HHH at 8.7%, SEG at 0.8%, GOOG at…