OM Group Significantly Expands Its Portfolio of Advanced Energy Materials and Technology With Planned Acquisition of Vacuumschmelze for euro 700 Million — Magnetic Engineering Company Represents OMG’s Most Significant Step in Diversifying Business — — OMG Continues to Push Closer to End Users in Fast-Growing End Markets — PR Newswire CLEVELAND, July 5, 2011 CLEVELAND , July 5, 2011 /PRNewswire/ — OM Group, Inc. (NYSE: OMG) today announced that it has signed a definitive agreement to purchase Vacuumschmelze GmbH & Co. KG (VAC) of Hanau, Germany , a global market leader in advanced materials and specialty magnetics, for approximately euro 700 million , including $50 million in common stock equity. […]