BBDO Worldwide was the clear winner on the agency network rankings, with 1,236 points versus second-placed Ogilvy & Mather's 1,027 points.
Elsewhere, Starcom MediaVest Group Chicago was named top media agency, with PHD Mumbai in second place. 360i New York was top digital agency, with R/GA New York in second.
Among holding companies, WPP (4,008 points) was ranked number one, ahead of Omnicom Group (3,943) Publicis Groupe (2,552) and Interpublic Group (2,535).
On the creative agency rankings, Lowe Lintas Mumbai was number one, scoring 213 points, with AMV BBDO second on 191 points and Colenso BBDO third on 148 points. Ogilvy & Mather New York was the top-ranked US creative agency, in fourth place on 136 points.
The Warc 100 is an annual list of the world's best campaigns, agencies and brands, based on their performance in effectiveness and strategy competitions in the previous calendar year. To compile this year's rankings, Warc tracked more than 2,200 winning campaigns from 87 different competitions.
You can read full 2015 results from the Warc 100 on our microsite. Warc subscribers can also read the full case studies for the winning campaigns, including 'Kan Khajura Tesan', which was ranked number one campaign of the year.
Data sourced from Warc