Orbital ATK to Report First Quarter 2018 Financial Results on May 3

Orbital ATK, Inc. (NYSE: OA), a global leader in aerospace and defense technologies, today announced that it will report its first quarter 2018 financial results on Thursday, May 3, 2018, prior to the opening of the market. The company will not conduct a conference call to discuss the quarterly results due to the pending acquisition of Orbital ATK by Northrop Grumman.

About Orbital ATK

Orbital ATK is a global leader in aerospace and defense technologies. The company designs, builds and delivers space, defense and aviation systems for customers around the world, both as a prime contractor and merchant supplier. Its main products include launch vehicles and related propulsion systems; missile products, subsystems and defense electronics; precision weapons, armament systems and ammunition; satellites and associated space components and services; and advanced aerospace structures. Headquartered in Dulles, Virginia, Orbital ATK employs approximately 14,000 people across the U.S. and in several international locations. For more information, visit www.orbitalatk.com.