Press & News
2012.02.02 News
GroupM Honored by Media Post’s OMMA Magazine and Media Magazine as Holding Company of the Year (2011)
GroupM Honored by Media Post’s OMMA Magazine and Media Magazine as Holding Company of the Year (2011)
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Global | GroupM, Holding Company of the Year, John Montgomery, Media Magazine, OMMA, Rob Norman CEO GroupM North America
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