The decision ends a year-long hunt for an advertising agency to create a global platform for the flagship Coke product. The pitches were led by W&K's Amsterdam office and Sra. Rushmore United.
W&K will develop an overarching idea for the brand, which will then be adapted for local markets.
Other Coke roster agencies, including Ogilvy & Mather, Publicis, McCann Erickson and Mother, were involved in the pitch at an earlier stage. The appointment will not affect their respective handling of the local Coke accounts.
Earlier this month, W&K's Portland office walked off with the flagship $150 million Coca-Cola North American account. It swiped the account without a pitch from Berlin Cameron United.
W&K declined to comment on the story.
Separately, AKQA has won the £3 million global online account for Coca-Cola. It picked up the business following after a six-way pitch.
It will now act as the lead agency on Coca-Cola's iCoke initiative, which aims to attract teenagers to the brand.