Sega Corporation

Sega Corporation was the legal successor to Sega Enterprises which came into being on 1st November, 2000. It was then when the company established the system of having ten different subsidiaries each with their own brand. These were WOW Entertainment, Sega AM2, Hitmaker, Amusement Vision, Sega Rosso, Smilebit, Overworks, Sonic Team, United Game Artists and Wave Master. Sega Corporation then took care of production and marketing work. This structure was disbanded in July of 2004. In the 1st of April 2015, it was split into Sega Games and Sega Interactive.

Source : IGDB