OM Group, Inc. is a diversified specialty chemicals and materials company serving global markets, including mobile energy storage, electronic devices, renewable energy and automotive systems. The Company develops, produces and distributes chemicals, materials, products and technologies. The Company serves a variety of sectors, including rechargeable batteries, electronic devices, cutting tools, petrochemical catalysts, electronics manufacturing, industrial coatings, defense, aerospace, and medical devices. In August 2011, the Company acquired Vacuumschmelze GmbH & Co. KG. On December 22, 2011, the Company acquired Rahu Catalytics Limited. On August 2, 2011, the Company completed the acquisition of the interests in VAC Holding GmbH (VAC). As of December 31, 2011, the Company operates in four segments: Magnetic Technologies segment, Advanced Materials segment, Specialty Chemicals segment and Battery Technologies segment.