Glasshouse Partnership founder James Thellusson will become the practice head, supported by previous head and fellow corporate director Lynda Redington.
The acquisition was finalised this week. The terms were not revealed.
Before founding the agency in 2004, Thellusson was UK chairman & MD of Europe for Cohn & Wolfe, joint MD of Cohn & Wolfe UK and CEO of Edelman UK.
Glasshouse Partnership employs five people, all of whom will join Lexis to create a £1.5m fee income division. Glasshouse currently generates around £600,000 in annual fees.
Margot Raggett, Lexis CEO said: ‘The acquisition is part of our strategy to grow as a multidisciplinary agency and capitalise on opportunities within the market. James will significantly add to the leadership of the agency and the range and depth of our consulting capability. The deal will enhance Lexis’ scale and add to our business development options.’
The Glasshouse Partnership name will remain as a specialist division for CSR and sustainability strategy work, but corporate operations will be under the Lexis banner.
Thellusson commented: ‘Our goal is to build a market leading corporate offer which will be top of mind with businesses looking for high quality corporate communications strategy and campaigning.’