OM Group Names David B. Knowles as President and Chief Operating Officer

   OM Group Names David B. Knowles as President and Chief Operating Officer

PR Newswire

CLEVELAND, March 21, 2013

CLEVELAND, March 21, 2013 /PRNewswire/ --OM Group, Inc. (NYSE: OMG) today
announced the appointment of David B. Knowles as president and chief operating
officer, effective April 8, 2013.

Mr. Knowles brings nearly 30 years of strategic and operational leadership and
will have responsibility for all of OM Group's global business operations.
Knowles most recently served as executive vice president and chief operating
officer of Myers Industries, a publicly-traded international diversified
manufacturer serving industrial, automotive, commercial and consumer markets.
Prior to Myers, Knowles was the president and chief executive officer of
Aristech Acrylics LLC, a specialty materials company. Before that, Mr. Knowles
held various senior management and operating leadership positions at
Honeywell, M.A. Hanna and other firms.

"I am pleased to have David join our leadership team. We identified David as
the ideal candidate following a methodical and comprehensive search process,"
said Joseph Scaminace, chairman and chief executive officer. "David is a
seasoned and trusted leader who consistently delivers results. His proven
track record of driving business growth, improving operational performance and
developing a strong team will be invaluable in executing our growth strategy.
David also has substantial experience in growth initiatives and he will be
working closely with our corporate development team as we further build out
our business platforms."

Knowles earned a bachelor of science in chemical engineering from the
University of Michigan and a master of management from the J. L. Kellogg
Graduate School of Management, Northwestern University.

ABOUT OM GROUP, INC.

OM Group is a technology-based industrial growth company serving attractive
global markets, including automotive systems, electronic devices, aerospace,
general 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
http://www.omgi.com.

SOURCE OM Group, Inc.

Website: http://www.omgi.com
Contact: Rob Pierce, vice president, finance, +1-216-263-7489
 
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