Slim Fast is talking to agencies about taking on creative responsibilities for the weight-management company's products.
The brand spent more than $17 million on measured media advertising in 2013, according to Kantar Media.
A representative at private equity player Kainos Capital, Slim Fast's new owner, declined to comment on the search.
Dallas-based Kainos has invested more than $2 billion of equity in more than 40 transactions in the food and consumer sector. At the time of the sale, Unilever said it would retain a minority stake in Slim Fast.
The Bull-White House, which works on Unilever’s I Can’t Believe It’s Not Butter, picked up the Slim Fast business in 2012 from Protagonist without a review. The account moved largely because of Matthew Bull, the agency’s South African creative founder, who had a 15-year history with Unilever at his previous agency, Lowe.