Pershing Square Tontine Holdings (NYSE: PSTH.U) filed for an IPO Monday, June 22.

The company is offering 150 shares for $20, to raise a total of $3 billion.

This is a new blank-check company a la Bill Ackman, the hedge fund manager who effectively told CNBCthe world was ending in March before shorting the market and turning $27 million into $2 billion.