William Ackman

Bill Ackman founded and runs Pershing Square Capital Management.Ackman married Nexi Oxman, a professor in MIT's Media Lab in January 2019, after finalizing his divorce from his longtime wife Karen.Ackman created Pershing Square in 2004 and rose to fame for his short of bond insurer MBIA and his rescue of mall operator General Growth.Coming out of the crisis, he at times topped Wall Street with activist wins on Canadian Pacific, Fortune Brands and Allergan.He hit hard times after trying to merge of Allergan and Valeant in 2014. He made over $1 billion on the former, but lost $3 billion on the latter.