Created when United Technologies merged its aerospace units Pratt & Whitney and Collins Aerospace with the Raytheon Company, in a deal valued at $86 billion, the new Raytheon Technologies enters the Fortune 500 six places higher than United Technologies alone last year. United spun off its Carrier HVAC and Otis elevator businesses in separate transactions. Greg Hayes, who was serving as United’s CEO, continues in that role at the newly merged company, which specializes in everything from aircraft to missile defense systems.