Bill Ackman's Pershing Square (NYSE: PS) Launches Largest U.S. Closed-End Fund IPO

Font: Financial Modeling Prep  • May 06, 2026

• Pershing Square (NYSE: PS) launched the largest U.S. closed-end fund IPO, successfully raising $5 billion.
• Despite its successful fundraising, the fund experienced a challenging market debut, with its share price falling 18% on the first day.
• Billionaire investor Bill Ackman aims to model the fund after Berkshire Hathaway, focusing on long-term growth and accessibility for investors.

Pershing Square (NYSE: PS) has launched a new closed-end fund, led by billionaire investor Bill Ackman. A closed-end fund is an investment company that offers a fixed number of shares in an initial public offering (IPO). After the IPO, these shares trade on a stock exchange, and their price is determined by market demand.

The company priced its IPO at $50.00 per share. In the public offering, Pershing Square raised $5 billion by selling 100 million shares. As highlighted by Barron's, this marks the largest amount ever raised for a U.S. closed-end fund and the first major launch of its kind in several years, attracting significant attention in the financial markets.

Despite the successful fundraising, the fund had a difficult start on the market. As highlighted by the New York Post, the stock’s price fell 18% on its first day. After being priced at $50, shares of Pershing Square opened for trading at $42 and ended the day at $40.90. This initial share price performance reflects early market sentiment.

Bill Ackman stated to CNBC that he wants to model the fund on Warren Buffett’s Berkshire Hathaway. The goal is to create a vehicle for long-term growth. Ackman noted that this structure allows an investor with as little as $50 to become a long-term shareholder in the company, promoting broad equity investment.

Currently, shares of Pershing Square are trading at $32.97. The stock's price has ranged between a low of $22.01 and a high of $38.27 over the past year. The company has a market capitalization of about $13.19 billion. Market capitalization is the total market value of a company's outstanding shares, a key metric for evaluating an investment fund.