WPP reported record revenues in 2016 with £14.4bn ($20bn), an increase of 17.6 per cent from the previous year, and a record profit before tax of £2bn ($2.6bn), up 26.7 per cent. However, CEO Martin Sorrell warned of a slowdown in growth in 2017 due to political uncertainties and a slow start to the year, sending shares in the FTSE 100 group down 7.6 per cent on the morning of the earnings release. Market Intelligence WPP biggest in 2016, Interpublic is growing fastest