A mos Hostetter Jr. is an American businessman who was a seminal figure in the creation of the modern cable television industry. A graduate of Amherst College and Harvard Business School, Hostetter co-founded Continental Cablevision in 1963 with his college fraternity brother, H. Irving Grousbeck. They started with a cable franchise for two small towns in Ohio and built the company into a cable powerhouse over the next three decades.

Hostetter was known for his long-term vision and a decentralized management style that empowered local system managers. He grew Continental Cablevision into the third-largest cable company in the United States. In 1996, he sold the company to US West for a massive $11 billion. However, he remained involved in the industry, later buying back the company's assets and renaming it MediaOne, which he then sold to AT&T in 2000 for an even larger sum. Today, he manages his fortune through his private investment firm, Pilot House Associates, and is a noted philanthropist in the Boston area.