Comcast Corporation (NASDAQ: CMCSA) is an American telecommunications and media conglomerate and the world's largest entertainment company. In 2017, the company reported nearly $84.5 billion in revenue and boasted a market cap of $164.7 billion as of October 25, 2018.

In June 2018, Comcast announced a $65 billion cash offer for certain Twenty-First Century Fox (FOXA) assets, $13 billion higher than Walt Disney's (DIS) offer of $52 billion. On July 19, 2018, Comcast dropped out of the bidding war for Twenty-First Century Fox, setting the stage for Disney to acquire critical pieces of the media empire. Then in September 2018, the company emerged as the decisive victor over Disney for control of British-pay television company, Sky PLC, valued at $39 billion at the time of the acquisition.

Comcast released its Q3 2018 earnings on October 25, 2018. The media giant reported earnings of $22.14 billion, compared to $20.98 billion over the same quarter last year.

Here are the three largest companies that Comcast owns.

Comcast Cable Communications, LLC

Comcast Cable Communications, LLC, a wholly owned subsidiary of Comcast Corporation, operates a hybrid coaxial and fiber-optic data network through which it offers cable television, internet, voice communication, and home automation services primarily under the Xfinity brand. The company has two subsidiaries, Comcast Business and Comcast Wholesale, both of which offer specialized networking services targeted at business customers. Comcast Cable's number of customers increased by 3.4% Year-Over-Year to 30.1 million in Q3 2018, including 288,000 net additions in the third quarter.

NBCUniversal Media, LLC

NBCUniversal Media, LLC, is Comcast Corporation's media, content, and entertainment arm. The company owns and operates numerous media properties, including broadcast networks, cable networks, movie studios, and theme parks. It is a wholly owned subsidiary of Comcast Corporation.

NBCUniversal Media operates the broadcast networks NBC and Telemundo, both of which air in all 50 U.S. states. The company owns local affiliate NBC stations, including 38 NBC and Telemundo local television stations. NBCUniversal also owns and operates a variety of cable news, sports and entertainment networks, including MSNBC, CNBC, the Golf Channel, E! and USA Network. NBCUniversal Media has a 30% stake in the online video streaming service Hulu.

NBCUniversal Media's movie studio, Universal Studios, Inc., is one of the country's largest studios by revenue. The company produces, markets and distributes its own films and acquires distribution rights to films produced by other companies. Universal Pictures has several film production subsidiaries, including Focus Features and Illumination Entertainment. NBCUniversal Media's theme park business, Universal Parks and Resorts, operates theme parks in Orlando, Florida, and Hollywood, California.

Comcast Spectacor

Comcast Spectacor is a live sports and entertainment company based in Philadelphia, Pennsylvania, the same city where its parent company is headquartered. Spectacor owns the Philadelphia Flyers, an NHL team, along with the Philadelphia Fusion, a competitive video game team. Comcast Spectacor's subsidiary, Spectra, offers comprehensive venue management services to arenas, convention centers, performing arts venues, and other entertainment facilities across the U.S. and in other countries around the world.