OM Group
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OM Group Incorporated is a metal-based chemistry firm based in Cleveland, Ohio, United States. It was ranked #992 on the 2009 Fortune 1000.
As 08/10/2007, OM Group Incorporated acquired the Electronics business of Rockwood Holdings Inc. The Rockwood Electronics businesses consist of Printed Circuit Board (PCB) Chemicals, Ultra Pure Chemicals (UPC) and Photomasks.
OM Group employs approximately 2000 people and have locations in the United States, the United Kingdom, France, Taiwan, Singapore and China.