Billionaire investor Bill Ackman said Monday he was looking to raise $3B and commit at least $1B for a new blank-check investment vehicle, named Pershing Square Tontine Holdings. Ackman said he plans to go public with 150M units at $20 each of Pershing. Ackman’s hedge fund, Pershing Square Capital, will invest $1B in the company, while having the option to bring the total value to $6.45B.