Sinclair Broadcast Group, Inc. Class A Common Stock, also called Sinclair Broadcast Group, is a television broadcasting company, which engages in the provision of content on local television stations and digital and other platforms. Read More It operates through Broadcast segment. The Broadcast segment provides free over-the-air programming to television viewing audiences in the communities through local television stations. Its primary channels consists of network provided programs, locally-produced news, local sporting events, programming from program service arrangements, syndicated entertainment programs, and internally originated programming. The company was founded by Julian Sinclair Smith in 1986 and is headquartered in Hunt Valley, MD.