Gonca KarakasGonca Karakas

Burson-Marsteller has acquired a majority stake in Istanbul-based Effect PR, its affiliate for the past four years.

On closing of the deal, the newly branded Effect Burson-Marsteller will focus on a market B-M sees as critical for its global growth. CEO Don Baer called Effect "one of the country's leading agencies."

Effect has 80 staffers and posted 2015 revenues of $2.5M.

Gonca Karakas, CEO of Effect, founded the firm in 1995. Clients include Microsoft and General Electric.

B-M is owned by WPP Group.