Based on its acquisition of digital independent AKQA, WPP is now has the biggest digital advertising agency organization in the U.S., according to an update of estimates released this morning by RECMA. The RECMA update estimates that when the 600 U.S.-based AKQA staffers are added to WPP's roster, the holding company now has a U.S.-based digital agency organization of 8,328, pushing it ahead of Publicis' 7,864 to become the dominant player in the U.S. digital agency marketplace. Based on its updated rankings, WPP now commands a 21.7% share of the market of U.S. digital agencies, comprised of six agency holding companies and various independent agencies. USA- Digital market shares July 2012Rank2012DIGITALSTAFF7 Group owners and 61 agenciesDigital shares18 328WPP USA (8 agencies) 21.7%27 864Publicis Groupe USA (7 agencies) 20.5%36 672Interpublic USA (12 agencies) 17.4%44 698Omnicom Group USA (7 agencies) 12.3%51 370Aegis Media USA (3 agencies) 3.6%61 099Havas USA (1 agency) 2.9%7825Dentsu America (1 agency) 2.2%///7 436Independents USA (23 agencies) 19.4%-38 292Top 112 USA digital agencies100% Source: RECMA USA Digital Guide