UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported):  March 3, 2016

Orbital ATK, Inc.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code:  (703) 406-5000

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On March 3, 2016, Mark W. DeYoung notified Orbital ATK, Inc. (the “Company”) that he will not stand for re-election at the Company’s 2016 Annual Meeting of Stockholders, in order to devote more time to his role as Chairman and Chief Executive Officer of Vista Outdoor Inc.  Mr. DeYoung will continue to serve as a director until the date of the 2016 Annual Meeting.  Mr. DeYoung’s decision did not result from any disagreement with the Company on any matter related to the Company’s operations, policies or practices.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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