Sinclair Broadcast Group is an American telecommunications company that is owned by the family of company founder Julian Sinclair Smith. Headquartered in Hunt Valley, Maryland, the company is the second-largest television station operator in the United States (behind Nexstar Media Group) by number of stations, and largest by total coverage; owning and/or operating a total of 173 stations across the country (233 after all currently proposed sales are approved) in over 100 markets (covering 40% of American households), many of which are located in the South and Midwest. Sinclair also owns three digital multicast networks (Comet, Charge! and TBD) and one cable network (Tennis Channel), and owns or operates four radio stations (all of which are located in the Pacific Northwest). Among other non-broadcast properties, Sinclair also owns the Ring of Honor (ROH) professional wrestling promotion.
Though Sinclair became a public company in 1995 and is currently traded on the NASDAQ under the symbol SBGI, the Smith family still retains a majority financial interest, and all four sons of Julian Smith serve as executives or directors – with David D. Smith currently heading the company as Executive Chairman. Source