Advertising giant WPP's wholly-owned operating company, Brand Union, has taken a 60% stake in Brazilian services provider Epigram.The firm's unaudited revenues for 2013 totalled in the region of R$8.4m, with gross assets of around $1.5m at the year-end.It employs 60 people and offers a range of services that includes graphic design and packaging, architecture and retail space design."This investment continues WPP's strategy of investing in fast growing markets and its commitment to developing its strategic networks throughout the dynamic Brazilian market," the FTSE 100-listed group said.The group was founded by Martin Sorrell in 1985.