Bill Ackman Net Worth

Bill Ackman has an estimated net worth of $11.9 billion, according to Forbes Real-Time Billionaires, Bill Ackman profile (figures as of October 20, 2026). That is up from $1.1 billion in 2019.

Bill Ackman is an American investor who founded and leads Pershing Square Capital Management. He is best known for running a focused hedge fund and taking big, public positions in a small group of companies. Pershing Square started in 2004. Forbes places him in Finance & Investments and says he is self-made. The firm manages $20 billion in assets and keeps a concentrated stock portfolio with 10 companies, including Chipotle, Uber and Amazon.

He first built his reputation through sharp, high-stakes calls. Forbes notes that he became widely known for his short against MBIA and for backing General Growth Properties during its turnaround. Before Pershing Square, he co-founded Gotham Partners in 1992. Over time, he also pushed for change at companies such as Canadian Pacific Railway, J. C. Penney and ADP. Those campaigns, along with long-held investments, helped make him one of the best-known names in hedge funds.

How Bill Ackman makes money

Ackman’s wealth comes from hedge funds. His main business is Pershing Square Capital Management, the investment firm he launched in 2004 with $54 million from his own funds and from Leucadia National. The firm invests in a tight list of holdings instead of spreading money across many stocks. Forbes says Pershing Square’s public equity portfolio is concentrated in 10 companies. That kind of structure ties Ackman’s fortune closely to the market value of a relatively small set of investments.

His career gained momentum through a mix of shorts, activist campaigns and long-term positions. He researched MBIA in 2002 and later profited from credit default swaps tied to the company during the 2008 financial crisis. He also drew attention for helping rescue General Growth Properties. In later years, Pershing Square built major stakes in businesses including Chipotle and Universal Music Group. Ackman also served on boards, including Universal in 2022 and Howard Hughes Holdings again in 2025.

What Forbes says about his fortune

Forbes tracked a long rise in Ackman’s wealth across the past several years. Its World's Billionaires List estimated $1.1 billion in 2019, $1.4 billion in 2020, and $2.8 billion in 2021. The estimate then moved to $3 billion in 2022 and $3.4 billion in 2023. Those changes match a period when Pershing Square kept making concentrated bets in public companies and remained centered on a relatively small number of large positions.

The Forbes estimate climbed further to $4.3 billion in 2024, then jumped to $9.2 billion in 2025. In 2026, Forbes put him at $9.1 billion on the annual list and $11.9 billion on its real-time tracker in October 2026. That latest figure sits alongside a larger Pershing Square platform and several important holdings. Forbes also notes that the firm runs $20 billion in assets under management, showing how central Pershing Square remains to Ackman’s wealth.