The proposed mega-merger of two of the world's leading advertising holding companies -- Omnicom Group of New York and Publicis Groupe of Paris -- has collapsed.
Late Thursday, the two companies announced the termination of their proposed marriage, which had been announced with great fanfare in July.
The companies said the breakup was mutual. They blamed "difficulties in completing the transaction within a reasonable timeframe" as the reason for their decision to call it quits.
The companies reportedly encountered resistance from foreign regulators over tax issues and antitrust concerns. The market value of the combined behemoth was expected to...