The four largest holding companies are now involved in US Federal ‘bid rigging’ probe with the biggest WPP confirming subpoena today

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BIG-4_NETWORKS.jpgAdWeek in New York reports that the US federal government’s investigation into allegations of antitrust practices at major ad agencies has expanded to include WPP, the world’s largest holding company.

WPP this morning released the following statement on its website: “WPP confirms that, similarly to Interpublic, Omnicom and Publicis, three of its subsidiaries have received subpoenas from the U.S. Department of Justice Antitrust Division concerning the Division’s ongoing investigation of video production and post-production practices in the advertising industry. WPP and its subsidiaries are fully cooperating with the enquiries.”

That means all four of the largest holding companies by revenue have been subpoenaed by the federal government as its investigation into reports of “bid rigging” continues.