Mabuhay Broadcasting System, Inc. (MBSI) is a Philippine radio network majority owned by the Ragasa family, heirs of founder Quirino De Guzman. Its corporate office is located at the 17th Floor, The Centerpoint, Julia Vargas Ave., Ortigas Center, Pasig, and its main studio is located at the 40th Floor Summit One Tower, Shaw Boulevard, Mandaluyong, Metro Manila. MBSI derives most of its income by selling airtime to blocktimers. MBSI's stations nationwide are operated by ZimZam Management of Manuelito "Manny" F. Luzon under the Win Radio brand.[2]
Background
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.[3] It was registered with the Securities and Exchange Commission (SEC) on December 13, 1973.
MBSI was granted a 25-year legislative franchise on April 13, 1992, under Republic Act (R.A.) 7395