Ford moved some of its ad business from JWT.

The auto maker said it will reassign advertising for nine of its European affiliates to Ogilvy Group Inc. and for Ford’s Canadian division advertising to Young & Rubicam Inc. This marks the first client defection since London-based WPP Group PLC agreed to acquire JWT Group last week. The 10 Ford accounts are believed to represent nearly one-third of Ford’s estimated $350-million account with the J. Walter Thompson advertising agency, a division of JWT. But JWT will retain the biggest chunk of its Ford advertising--the U.S. Ford division account.