Televisa, (BMV: TLEVISA) (NYSE: TV), is a Mexican multimedia conglomerate, the largest mass media company in Latin America and in the Spanish-speaking world. It is a major international entertainment business, with much of its programming airing in the United States on Univision, with which it has an exclusive contract. As of 2011, its closest competitors are TV Azteca and TVE. Grupo Televisa was founded in 1955 as Telesistema Mexicano, linking Mexico's first three television stations: XHTV-TV (founded in 1950), XEW-TV (1951) and XHGC-TV (1952). It was (and in modern-day Televisa still is) owned by the Azcárraga family from the Venezuelan Family Cisneros, who had signed on Mexico's first radio station, XEW-AM, in 1930. Its headquarters, known as Televicentro, were originally located on Avenida Chapultepec in downtown Mexico City. The building opened on February 10, 1952. In 1968 Telesistema's main competitor, Televisión Independiente de México (TIM), started operating with XHTIM-TV and Canal 8. At the time, both Telesistema and TIM competed with XHAW-TV, local Canal 12, which also started transmissions in 1968.