Yet again Havas chairman Vincent Bolloré has upped his personal stake in London-headquartered global media and research specialist Aegis Group.

A further nineteen million shares in Aegis have been acquired by the French corporate raider, it was revealed Tuesday, lifting his holding from 17.4% to 19.1%.

Within the past two weeks, Bolloré's holding has increased from 11% to almost twenty per cent and few believe it will end there.

Reportedly, the Frenchman does not seek a seat on the Aegis board and it seems clear he is hunting bigger game than a voice in Aegis' boardroom.

Another contender has just thrown a hat into the ring: UBS, the Swiss-headquartered global investment bank and asset management giant. On Monday it acquired a 1.3% slice of Aegis - and seemingly has further ambitions.

Data sourced from; additional content by WARC staff