"on 6 June 2018, the acquisition was completed, and Orbital ATK became Northrop Grumman Innovation Systems.As of 1 January 2020, the name was changed to Space Systems under a large restructuring and rebranding initiative. " https://en.wikipedia.org/wiki/Orbital_Sciences_Corporation

See https://www.northropgrumman.com/who-we-are/business-sectors/space-systems