ABS-CBN Corporation is the largest entertainment and media conglomerate in the Philippines. It is one of the core businesses of the Lopez Holdings Corporation which are headed by an influential Filipino family. It was formed by the merger of Alto Broadcasting System (founded as Bolinao Electronics in 1946 by American electronics engineer James Lindenberg and Antonio Quirino) and the Chronicle Broadcasting Network (founded in 1952 by media tycoon Eugenio Lopez, Sr. and his brother, the then-Philippine Vice-President Fernando Lopez). It was incorporated as the ABS-CBN Broadcasting Corporation on February 1, 1967, shorted to simply ABS-CBN Corporation in 2010 to reflect the company's diversification. The common shares of ABS-CBN was first traded in the Philippine Stock Exchange in July 1992 under the ticker symbol ABS and as of August 2015 has a market capitalization of over 50 billion pesos.