X0306 4 2016-06-23 0 0000866121 ORBITAL ATK, INC. OA 0001106755 HANISEE ROBERT M C/O ORBITAL ATK, INC. 45101 WARP DRIVE DULLES VA 20166 1 0 0 0 Phantom Stock Units 2016-06-23 4 A 0 4.0781 87.48 A Common Stock 4.0781 1193 D These securities were acquired through the deemed reinvestment of dividend equivalents in the form of additional Phantom Stock Units credited to the reporting person's account under the Issuer's Deferred Fee Plan for Non-Employee Directors. The Phantom Stock Units are to be settled 100% in cash in annual installments starting on the first business day of the year after the reporting person ceases to be a director of the Issuer. 1-for-1 (each Phantom Stock Unit is the economic equivalent of one share of Common Stock). /s/ Richard N. Osborne, Attorney-in-Fact 2016-06-23