Carat won the consolidated Disney account in 2010 after a closed pitch against ZenithOptimedia.
In 2008, Disney split its account, then estimated to be worth £120 million, between Carat and ZenithOptimedia after a pan-European pitch. The company awarded
Disney Studios and Home Entertainment to Carat, while ZenithOptimedia was handed Disneyland Paris.
A Disney spokeswoman said: "The Walt Disney Company EMEA is conducting a strategic review of media agencies in the marketplace.
"This is not a reflection of the performance of Carat, with which we have a long-standing and successful relationship."