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 117.4% since 2016Q1. OpenStocks tracks 40 consecutive quarterly snapshots for this manager — every position change, new entry, and exit is logged below.
Methodology: TWR tiles chain-link quarterly mark-to-market across consecutive filings (GIPS-compliant) · actual tiles use a real 13F snapshot marked to today · backtest tiles re-price the current book to historical prices.
We mark Bill Ackman (Pershing Square)'s disclosed portfolio to current market prices and compare its growth against the S&P 500 (SPY). Bill’s portfolio is 36.8% over the last 12 months · 117.4% since 2016Q1.