Global M&A Roundup Sep 22, 2017 – Orbital ATK, Colonial Mutual Life Assurance Society Aerospace & Defense Financial Institutions Investment Banking Mergers & Acquisitions USA by Sara - September 25, 2017March 19, 20180 Our previous Canadian Mergers & Acquisitions roundups can be found here. Our previous global M&A roundups can be found here. Target: Orbital ATK, Inc. (NYSE:OA) Industry: Aerospace and Defense Acquirer: Northrop Grumman Corporation Target: Orbital ATK, Inc. Size: $9.3 billion Consideration: 100% Cash Source of Funds: Cash, Debt Sell Side Advisor: Citi Buy Side Advisor: