The world's top media companies are conglomerates that have a significant presence in various forms of media, including television, film, publishing, and digital platforms. These companies have a global reach and influence in shaping the entertainment and information landscape. Here are some of the top media companies:

1. Comcast Corporation: Comcast is a leading media and technology company based in the United States. It owns NBCUniversal, which includes major television networks like NBC, CNBC, MSNBC, and the Universal Pictures film studio. Comcast also owns the popular streaming service Peacock.

2. The Walt Disney Company: Disney is one of the largest and most recognizable media companies globally. It owns the ABC television network, ESPN, Pixar Animation Studios, Marvel Studios, Lucasfilm (Star Wars franchise), and 20th Century Studios. Disney also operates the successful streaming service Disney+.

3. AT&T Inc.: AT&T is a telecommunications and media conglomerate in the United States. Through its subsidiary WarnerMedia, AT&T owns Warner Bros. Entertainment, HBO, CNN, and Turner Broadcasting System. WarnerMedia also launched the streaming service HBO Max.

4. ViacomCBS Inc.: ViacomCBS is a global media company that owns various television networks, including CBS, MTV, Nickelodeon, BET, and Showtime. The company also has a significant presence in film production and distribution.

5. Sony Corporation: Sony is a Japanese conglomerate with a strong presence in the media and entertainment industry. It owns Sony Pictures Entertainment, which produces and distributes films and television shows globally. Sony also operates the music label Sony Music Entertainment.

6. Netflix Inc.: Netflix is a leading streaming service that has transformed the media industry. It offers a vast library of films, TV series, and documentaries. Netflix also produces its original content, including highly acclaimed shows like "Stranger Things" and "The Crown."

7. Amazon.com Inc.: Amazon is primarily known as an e-commerce giant, but it has also become a significant player in the media industry. Through its subsidiary Amazon Studios, the company produces and distributes films and TV series. It also operates the streaming service Prime Video.

8. News Corporation: News Corp is a media conglomerate founded by Rupert Murdoch. It owns several major newspapers worldwide, including The Wall Street Journal, The Times (UK), and The Australian. News Corp also has a significant presence in book publishing and owns HarperCollins.

These companies are constantly evolving and expanding their reach through acquisitions, partnerships, and investments. It is worth noting that this list is not exhaustive, and there are other influential media companies globally, such as Comcast-owned Sky, Bertelsmann, and Tencent, among others.

References:

- Comcast Corporation: https://corporate.comcast.com/

- The Walt Disney Company: https://thewaltdisneycompany.com/

- AT&T Inc.: https://www.att.com/

- ViacomCBS Inc.: https://www.viacbs.com/

- Sony Corporation: https://www.sony.com/

- Netflix Inc.: https://www.netflix.com/

- Amazon.com Inc.: https://www.amazon.com/

- News Corporation: https://newscorp.com/