BRIEF-Omnicom Group CEO John Wren 2015 total compensation of $23.6 mln vs $24 mln in 2014 By: Reuters: Company News April 14, 2016 at 17:06 PM EDT * CEO John D. Wren 2015 total compensation of $23.6 million versus $24 million in 2014- sec filing Read More >> Related Stocks: Omnicom Group