24. Riot Games Inc
Headquarters: Los Angeles
Bought By: Tencent Holdings Ltd
Headquarters: Shenzhen, China
Riot Games is best known as the creator of League of Legends, a multiplayer online battle extravaganza that pits users against each other. The game debuted in 2009 and gained a lot of traction, becoming the company’s best-known product. Although Tencent and Riot had been partners for many years, Tencent upped the ante in 2015.
The company bought the rest of the stakes that it didn’t own, making it Riot’s parent company and giving it full creative control. Prior to that, Tencent still owned 93% of the business, so it seemed like a natural progression. Riot Games is worth $6 billion.