The Ratanarak family have substantial holdings in a number of Thai-based companies including Bank of Ayudhya, Siam City Cement, Allianz Ayudhya Capital, Matching Maximize Studio, Medial Studio, Grand Canal Land and Eastern Star Real Estate as well as holding a majority stake in Bangkok Broadcasting & Television Company (BBTV), which operates Thailand's Channel 7.
[3] Chachchon’s father Krit Ratanarak is reported to be taking a lead in the development of Bangkok’s Rama III Riverside district in the central south west of the city.
[6] Today it is again regarded as an up-and-coming district of central Bangkok amid long-term moves to redevelop the area in the same fashion as London’s Canary Wharf.
[6][9][10] Rama III has been identified by the Bangkok Metropolitan Administration as part of a zone to be developed as a model of environmentally friendly mass transit system.
[12] Tonson Group’s first development in Rama III is an ultra-prime condominium project called The Sathu Residences.