The wealth of Bill Ackman has logged a massive increase and has risen from $4.3 billion in 2024 to $9.2 billion in 2025, one of the biggest Wall Street turnarounds. Much of this growth stems from well-timed investments in established markets, but Ackman has also begun positioning his portfolio to benefit from emerging technologies, including artificial intelligence, hinting at his interest in the innovations shaping the future.
Who is Bill Ackman?
Bill Ackman is the founder and CEO of Pershing Square Capital Management, which is a hedge fund that specializes in activist investments. Pershing Square Capital Management holds around $20 billion in assets under management and was founded in 2004. Ackman is known as an activist investor; this type of investor takes an ownership stake in a company that is struggling to improve the company, and as a result, the stock price increases. He has had major success in this area and is well known in the activist investment field.
Ackman grew up in Chappaqua, New York, where he was surrounded by business and finance in his household. Lawrence Ackman, his father, led a real estate company and exposed Bill to the mechanics of investing and deal-making. After excelling in school, he went on to study Social Studies at Harvard, where he graduated in 1988. These foundational and formative years shaped him to become the confident and number-driven investor that the world knows today.
Key investments driving growth
His Pershing Square Capital Management hedge fund has earned a return of 25.3 percent this year—more than twice the S&P 500’s 11.7 percent rise—primarily because of savvy and well-timed bets. The enormous holdings came from his holdings in Fannie Mae and Freddie Mac. The two mortgage giants saw their share prices rise by over 300 percent in 2025, and Ackman’s 180 million shares in these firms are now worth an estimated $2.5 billion.
While these traditional investments account for a significant share of his recent gains, Ackman has also ventured into the world of emerging technologies. By mid-2025, about 45% of Pershing Square’s portfolio was tied up in companies at the forefront of artificial intelligence, including Alphabet, Amazon, and Uber. He acquired more than 5.8 million shares of Amazon alone—worth around $1.3 billion—along with sizable stakes in Alphabet and Uber, signaling that even as he capitalizes on established markets, he’s keeping a close eye on the innovations that could define the next decade.
