Billionaire hedge fund manager Bill Ackman has filed for a US initial public offering for his Pershing Square vehicle on the New York Stock Exchange. The filing reveals plans to list shares in a new closed-end fund, Pershing Square USA (PSUS), which will offer investors exposure to Ackman's investment decisions and fee-generating management company.

The structure of the offering provides investors with dual benefits. Every 100 shares in PSUS entitles stockholders to 20 shares in the management company. The SEC filing shows shares in Pershing Square USA will be offered at $50 each, with Ackman having secured $2.8 billion in commitments from pensions, insurance companies, and other institutional investors.

This move represents a significant shift for Ackman's investment approach, allowing greater transparency and liquidity for his fund's investors. The IPO structure creates a unique hybrid investment vehicle that bridges traditional hedge fund strategies with public market accessibility, potentially attracting a broader range of institutional capital to Ackman's proven track record of value investing.