Complex sentence: Buy represented 62% of total revenues in 2011 and major clients include The Coca-Cola Company, Nestle S.A., The Procter & Gamble Company, and the Unilever Group.
Split into simpler sentences: Buy represented 62% of total revenues in 2011. Major Buy clients include The Coca-Cola Company, Nestle S.A., The Procter & Gamble Company, and the Unilever Group.