No 3 Xiaomi, China

China's smart devices maker was founded in 2010, and its products include smartphones and home appliances. In 2014, Xiaomi was valued at $46 billion.

But according to Reuters, citing a source, the company will raise $100 billion after going public in the future.

The result is based on the company's good revenue and profit predictions this year. Reuters said the company's revenue will be $17 billion to $18 billion, and profits will be $1 billion in 2017. Next year, Xiaomi's profits will double to $2 billion.

Moreover, Xiaomi's subsidiary company Huami plans to launch an initial public offering on US stock markets to raise $300 million in 2018.