JPMorgan Chase Unit Launches $400 Million U.S. Media Review

Zenith Media handles business

JPMorgan Chase & Co.'s Chase unit is reviewing its U.S. media planning and buying handled by Zenith Media, said to be worth $400 million, according to sources.

The business is thought to include U.S. media buying for Chase retail, credit card and asset management businesses, which the Publicis Groupe media unit won in 2005.

A ZenithOptimedia rep declined comment.