 NEW YORK--BUSINESS WIRE--Pershing Square Tontine Holdings, Ltd. NYSE:PSTH CEO Bill Ackman today issued the following letter. August 19, 2021 Dear Pershing Square Tontine Holdings, Ltd. Shareholder, A purported shareholder filed a lawsuit on August 17th claiming that PSTH has been operating as an illegal investment company because, among other claims, PSTH invested its IPO proceeds in securities short-term Treasurys and money market funds that own short-term Treasurys. This is of course so 