Sinclair Broadcast Group, Inc. operates as a diversified television media company in the United States. The company operates in two segments, Local News and Marketing Services; and Sports. It owns or provides various programming, operating, sales, and other non-programming operating services to television stations. The company broadcasts free over-the-air programming, such as network provided programs, locally-produced news, local sporting events, programming from program service arrangements, syndicated entertainment programs, and internally originated programming to television viewing audiences in the communities through its local television stations. As of December 31, 2019, it owned, operated, and/or provided services to 191 stations in 89 markets, which broadcast 629 channels. The company also owns and operates various networks carried on distribution platforms; and Tennis Channel, a cable network that includes coverage of various tennis' top tournaments and original professional sport, and tennis lifestyle shows. In addition, it owns regional sports network, which has the exclusive rights to air games of 45 professional sports teams and other sporting events. Further, the company offers digital agency services; and provides broadcast related technical services to the broadcast industry, as well as designs and manufactures broadcast systems, including transmitters and antennas. Additionally, it owns various non-media related investments, including private equity, mezzanine financing, and real estate investments. It also offers Tennis Magazine; and operates Tennis.com, an online tennis platform. Sinclair Broadcast Group, Inc. was founded in 1986 and is headquartered in Hunt Valley, Maryland.