Mabuhay Broadcasting System, Inc. (MBSI) is a Philippine radio network majority owned by the Ragasa family, heirs of founder Quirino De Guzman.
[2] In November 1973, during the martial law in the Philippines, Quirino De Guzman Sr. and Arcadio M. Carandang decided form a joint venture and organize a corporation known as Mabuhay Broadcasting Systems, Inc. (MBSI).
Carandang contributed his technical expertise and new equipment while De Guzman pooled financial resources and needed franchise to the company.
MBSI was granted a 25-year legislative franchise on April 13, 1992, under Republic Act (R.A.) 7395[4] to construct, install, operate and maintain commercial radio broadcasting stations in the island of Luzon.
Based on recent SEC filing, MBSI is majority owned by the Ragasa Family, heirs of Quirino de Guzman Sr. with 64% share.