Bill Ackman

William Albert Ackman is an American billionaire hedge fund manager, recognized as the founder and chief executive of Pershing Square Capital Management. Known for his activist investing approach, Ackman has made significant contributions to the financial landscape, advocating for changes in corporate governance and management practices. His investment philosophy often emphasizes thorough research and long-term value creation, with a focus on identifying undervalued companies poised for growth. Pershing Square Capital Management, under Ackman's leadership, employs a concentrated investment strategy, typically focusing on a limited number of high-conviction positions across various sectors. The firm has made notable investments in companies such as Microsoft, Alphabet, and Hilton Worldwide, reflecting a diverse portfolio that spans consumer cyclical, communication services, and real estate sectors. Ackman's approach often involves both equity investments and strategic engagement with company management. The disclosed trading record for Ackman reveals a dynamic strategy characterized by 200 total disclosures between October 2020 and May 2026. His record shows a pattern of position increases, with 90 instances of adding to existing holdings, alongside 52 reductions and 27 exits. Notably, one of the largest moves involved a significant action on Uber Technologies, amounting to approximately $2.2 billion. This activity highlights Ackman's active management style and his responsiveness to market conditions.