This is the maiden flight of the OmegA rocket developed by Northrop Grumman. This launch also carries small geostationary satellites called NationSat for Saturn Satellite Networks.
OmegA is a launch vehicle in development by Northrop Grumman as an NSSL replacement program intended for national security and commercial satellites.
Northrup Grumman Innovation Systems designs, builds and delivers space, defence and aviation-related systems to customers around the world. They aquired Orbital ATK in 2018 along with its launchers and ongoing missions. Antares launches from Wallops in Virginia. Minotaur has many launch sites, with the most active now being Cape Canaveral and Vandenberg. Pegasus is an air launched vehicle from an aircraft and so has many launch locations.INFO WIKI