Bill Ackman.REUTERS/Shannon Stapleton Bill Ackman poked at Carl Icahn, called out the debt-ceiling chaos, and touted his Alphabet wager. The Pershing Square chief talked up his other bets, including Lowe's, Hilton, and Howard Hughes. Here are the highlights from Ackman's first-quarter investor call and tweet on Wednesday. Bill Ackman took aim at Carl Icahn, complained about the debt-ceiling debacle, and trumpeted his hedge fund's new Alphabet wager on Wednesday.The billionaire investor and Pershing Square chief also touted several of his firm's other holdings, including Lowe's, Hilton, and Howard Hughes.