Blackstone’s Stephen Schwarzman among billionaires with major stakes in facility where management seeks further cuts to union workers, retirees Blackstone Group CEO Stephen Schwarzman is interviewed in 2014 by Maria Bartiromo during her “Opening Bell with Maria Bartiromo” program, on the Fox Business Network, in New York. President-elect Donald Trump on Dec. 2 announced the formation of an advisory group, led by Schwarzman, of more than a dozen CEOs and business leaders who will offer input on how to create jobs and speed economic growth.