David B. Knowles

OM Group, Inc. is a technology-based industrial growth company. It engages in developing, producing and marketing chemicals, advanced materials and electrochemical energy storage products worldwide. The company operates through the following segments: Magnetic Technologies, Advanced Materials, Specialty Chemicals and Battery Technologies. The Magnetic Technologies segment is engaged in the development, manufacturing and distribution of industrial-use magnetic products and systems for electronic equipment markets, including the renewable energy, automotive systems, construction & mining and industrial sectors. The Advanced Materials segment manufactured inorganic products using unrefined cobalt and other metals and served the mobile energy storage, renewable energy, automotive systems, construction and mining and industrial end markets. The Specialty Chemicals segment develops, produces and supplies chemicals for electronic applications, industrial applications including coatings, composites and tire; and photomasks used by customers to produce semiconductors and related products. The Battery Technologies segment provides advanced batteries, battery management systems, battery-related research and energetic devices for defense, space and medical markets. The company was founded in 1991 and is headquartered in Cleveland, OH.

Part of Techmer PM LLC, ACCEL Corp produces colors and additives. The company is based in Naperville, IL. ACCEL was acquired by Techmer PM LLC from Cookson Group Plc on March 31, 2008.

VACUUMSCHMELZE GmbH & Co. KG designs, manufactures and markets magnetic materials, systems, parts and related products. The company was founded in 1914 is headquartered in Hanau, Germany.

Aristech Acrylics LLC manufactures and distributes cast acrylic and solid surface sheets. It also distributes solid surfaces for counter tops and wall panels, bath/shower and hot tub shells, and indoor and outdoor signage applications worldwide. The company was founded in 1969 and is headquartered in Florence, KY.

Vectra Corp. is a technology driven specialty materials and chemicals company. It serves different markets such as automotive systems, electronic devices, aerospace and defense, industrial and medical. The company is headquartered in Clayton, MO.