Falls Church, VA. & Dulles, VA. • Northrop Grumman Corporation, a leading global security company, and Orbital ATK, Inc., a global leader in aerospace and defense technologies, today announced they have entered into a definitive agreement under which Northrop Grumman will acquire Orbital ATK for approximately $7.8 billion in cash, plus the assumption of $1.4 billion in net debt. Orbital ATK shareholders will receive all-cash consideration of $134.50 per share. The agreement has been approved unanimously by the Boards of Directors of both companies. The transaction is expected to close in the first half of 2018 and is subject to customary closing conditions, including regulatory and Orbital ATK shareholder approval.