Company overview. Tribune Company was an American multimedia company headquartered in Chicago, founded June 10, 1847, with the first edition of the Chicago Daily Tribune. It reincorporated in Delaware in 1968, went public in 1983, was taken private in a 2007 debt-funded buyout led by Sam Zell, filed Chapter 11 in December 2008 (the largest bankruptcy in US media history), and emerged in December 2012 under creditor ownership. It was renamed Tribune Media Company in August 2014 after spinning off its newspapers as Tribune Publishing. Tribune Media traded publicly (NYSE: TRCO; earlier OTC: TRBAA) and reported about 5,800 full- and part-time employees as of Dec. 31, 2018 (company filings, via Chicago Tribune). Nexstar Media Group acquired it for $4.1 billion ($7.2 billion including debt), closing Sept. 19, 2019; the standalone company no longer exists.
Products / operations. Tribune was an operating media company, not a non-practicing entity. Tribune Broadcasting operated roughly 42 owned or operated television stations (including WGN-TV Chicago, KTLA Los Angeles, WPIX New York), the WGN America cable network, WGN-AM radio, and a 31% stake in Food Network, plus digital/data units such as Gracenote (acquired 2014). Its former publishing division included the Chicago Tribune, Los Angeles Times, Baltimore Sun, Orlando Sentinel and Sun-Sentinel.
Patent-litigation posture. One tracked case, as a defendant, and zero as plaintiff — the profile of an operating company reacting to third-party patent assertions rather than an active litigant. The single matter is InternetAd Systems, LLC v. Turner Broadcasting System, Inc. et al., filed June 15, 2006 in the Northern District of Texas and closed April 8, 2008. N.D. Tex. was a frequent patent-plaintiff venue in that period.
Notable context. The plaintiff, InternetAd Systems, was a wholly owned subsidiary of Acacia Research Corporation's Acacia Technologies group, a patent-licensing/assertion entity. The asserted portfolio covered four patents (5,572,643; 5,737,619; 6,185,586; 6,457,025) on interstitial and pop-up internet advertising; Acacia announced in April 2008 that InternetAd had settled and licensed them to Time Warner, and it separately licensed Move, Inc. and Best Western in N.D. Tex. suits. Tribune's appearance reflects its role as an online publisher and broadcaster using web advertising, not any assertion activity of its own.