Carta Holdings, Inc. provides online advertising services in Japan and internationally. It operates through three segments: Partner Sales Business, Ad Platform Business, and Consumer Business. The Partner Sales Business segment offers advertising space and solutions through a media communication. The Ad Platform Business segment operates fluct, as media support service; PORTO; TELECY; and Zucks, an operational advertising platform. The Consumer Business segment owns media under the EC Navi and PeX names; and provides HR and EC related services. This segment also engages in publishing of smartphone games. The company was founded in 1996 and is based in Tokyo, Japan. Carta Holdings, Inc. is a subsidiary of Dentsu Group Inc.