CLEVELAND, June 3, 2013 /PRNewswire/ — OM Group, Inc. (NYSE: OMG) today announced that it has completed the previously-announced divestiture of its Ultra Pure Chemicals (UPC) business to KMG Chemicals, Inc. (NYSE: KMG). The UPC business was included in the Company’s Specialty Chemicals segment. OM Group received net cash consideration of approximately $63 million, including an amount for working capital, upon the closing of the transaction and used these proceeds to continue to pay down its outstanding debt.

ABOUT OM GROUP

OM Group is a technology-based industrial growth company serving attractive global markets, including automotive systems, electronic devices, aerospace, industrial and renewable energy. Its business platforms use innovative technologies and expertise to address customers’ complex applications and demanding requirements. For more information, visit the Company’s website at www.omgi.com.

FORWARD-LOOKING STATEMENTS

The foregoing discussion may include forward-looking statements for purposes of the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Such forward-looking statements are based upon specific assumptions and are subject to uncertainties and factors relating to the company’s operations and business environment, all of which are difficult to predict and many of which are beyond the control of the company. These uncertainties and factors could cause actual results of the company to differ materially from those expressed or implied in the forward-looking statements contained in the foregoing discussion. Such uncertainties and factors include: risks arising from uncertainty in worldwide economic conditions; extended business interruption at our facilities; fluctuations in the price and uncertainties in the supply of rare earth materials and other raw materials; our ability to identify, complete and integrate acquisitions aligned with our strategy; changes in effective tax rates or adverse outcomes resulting from examination of our income tax returns; the majority of our operations are outside the United States, which subjects us to risks that may adversely affect our operating results; level of returns on pension plan assets and changes in the actuarial assumptions; the majority of our cash is generated and held outside the United States; the timing and amount of common share repurchases, if any; fluctuations in foreign exchange rates; unanticipated costs or liabilities for compliance with environmental regulation; changes in environmental, health and safety regulatory requirements; technological changes in our industry or in our customers’ products; our ability to adequately protect or enforce our intellectual property rights; disruption of our relationship with key customers or any material adverse change in their businesses; successful execution of the GTL supply agreement signed in connection with the Advanced Materials sale; and the Risk Factors set forth in Part I, Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2012.

SOURCE OM Group, Inc.