Omnicom's top 150 customers now make up 50% of its revenue, versus 350 clients accounting for that portion prior to its merger with Interpublic (Benoit Berthelot/Bloomberg)

Omnicom's top 150 customers now make up 50% of its revenue, versus 350 clients accounting for that portion prior to its merger with Interpublic (Benoit Berthelot/Bloomberg) — brisk.news