Orbital Sciences Corporation as an independent corporate entity no longer trades separately under its original name, but its legacy, advanced rocket programs, and spacecraft manufacturing operations remain fully active. The enterprise underwent a major corporate merger with Alliant Techsystems to form Orbital ATK, which was subsequently acquired by Northrop Grumman and integrated directly into its defense and space systems division. Today, the facilities, engineering teams, and product lines originally developed by Orbital Sciences continue to design and manufacture commercial launch vehicles, missile systems, and NASA resupply spacecraft under corporate ownership.