Friday's announcements follow agreements last Friday to lower exhibitors' costs by revising rules.
Six shows that spend $70 million will return to Chicago after moving elsewhere.
Three shows are coming for the first time, including Solar Power International.
"It's a big show. 27,000 people will come to Chicago in 2013 and 2015, and they wouldn't have come if we hadn't been able to make the kinds of agreements that we announced last week," said McCormick Place trustee Jim Reilly.
"It shows that if we all give a little, everybody understands that we all will win a lot, and the only people that won't win today will be Las Vegas and Orlando," said Emanuel. "And my thoughts and prayers are with 'em, cause I want Chicago to win, and that's what I care about."
Emanuel praised union leaders for compromising to bring more work to their members.