The Coca-Cola Company unseated Unilever from the top spot of the "most effective global marketer" category in the 2015 Effie Effectiveness Index. Coca-Cola also retained the No. 1 ranking in the index's "most effective brands category" for the third straight year.

Now in its fifth year, the Effie Effectiveness Index recognizes the companies, brands and agencies behind the world’s most effective marketing ideas. Rankings are determined by success in more than 40 national and regional Effie Award competitions.

The 2015 Effie Effectiveness Index was compiled from more than 3,000 finalists and winning entries from national and regional Effie Award competitions in 2014.

"Effie Worldwide's annual Effie Index recognizes the exceptional ideas that delivered results and made a difference for businesses globally,” explains Carolyn Everson, chair of the Board of Directors, Effie Worldwide and VP, global marketing solutions at Facebook. “The Index is distinctively comprehensive in that it shines a light on the incredible ideas that worked around the globe, from local to international campaigns, and from both multi-nationals and independent brands. This year's honorees have set the bar higher for the industry and proven that great creative combined with thoughtful strategy equates to successful marketing initiatives.”