Four agencies have emerged as contenders in the CVS media review. In the hunt are two WPP entries: Mindshare and MediaCom; Omnicom’s OMD; and Interpublic Group’s Universal McCann, according to sources.

CVS spent more than $90 million in domestic measured media in each of the past two years, per Nielsen.

via CVS Eyes 4 Shops for $90 Mil. Media.