(November 2, 2017, 9:12 AM EDT) -- ALEXANDRIA, Va. — Orbital ATK Inc. shareholders filed six different securities class action lawsuits between Oct. 11 and Oct. 25 in a Virginia federal court, seeking to halt a pending shareholder vote on a proposed merger deal that would see aerospace manufacturer Orbital ATK acquired by aerospace and defense technology company Northrop Grumman Corp. until shareholders receive certain information necessary to conduct a vote on the proposed deal. ...