The Grayling Group has acquired Profile Corporate Communications and merged it into its London lobbying shop, Westminster Strategy.
The deal, for an undisclosed sum, sees five Profile employees join WS, bringing that agency's staff count to 35.
Profile MD Susan Eastoe will join the WS board but the Profile name will remain in place for some time within the Grayling Group in the context of corporate social responsibility work.
Diageo, Sainsbury's and Aventis Pharma are among the clients Profile adds to the WS roster. It also brings fees of almost pounds 1m.
Profile has had a varied ownership record. Launched in 1981, it was bought by the then Broadstreet Group ten years later, before being taken over by ad agency BDDP. Eastoe, who had been at Profile since 1998, led a management buy-out in 1993.
The agency now joins Grayling, which has itself been taken over by Lopex and then Havas in the last three years.
Eastoe, who will now report to Grayling Political Strategy MD Leighton Andrews, said: 'There is a natural fit between our client base and Grayling's.'
Profile's other clients include the Falkland Islands government and the Corporate Responsibility Group.