Northrop Grumman nears deal to purchase Orbital ATK: sourceSeptember 17, 2017 by quixnet Northrop Grumman nears deal to purchase Orbital ATK: sourceReutersNorthrop Nears Deal in $7.5 Billion Range for Orbital, WSJ SaysBloombergNorthrop Grumman nears $7bn Orbital dealFinancial TimesFull coverage