DULLES, Va.--(BUSINESS WIRE)--Orbital ATK, Inc. (NYSE: OA), a global leader in aerospace and defense technologies, today announced that it will release second quarter 2015 financial results prior to the opening of the market on Thursday, August 6, 2015. Orbital ATK will conduct a conference call with financial analysts the same morning to discuss the results and company outlook. The call will begin at 9:00 a.m. (EDT) and will be hosted by: Mr. David W. Thompson, President and Chief Executive Of