River Islands has been envisioned and created by River Islands Development, a subsidiary of The Cambay Group, which is wholly owned by British Isles-based Somerston Holdings. The Cambay Group team has hundreds of years of combined experience in real estate investment, development and finance, with projects representing master planned community development, office, retail, telecom and data centers. In Northern California, Cambay is best known as the developer of Windemere in San Ramon, one of the largest master planned communities in the San Francisco Bay Area.