Developers Square and Enix are merging to become one complete company with Enix having the majority.
Square and Enix announced they will be merging into a new company called Square Enix in Japan on April 1, 2003......The purpose of the amalgamation is to use the centripetal force to the creator and the content property to maximize and reinforce the earnings base. In the amalgamation ratio, Square is 0.81 and Enix is 1.0, therefore Square will become the dissolution company while Enix will take charge of Square Enix
Source The Magic Box.