No 7 SpaceX, US

The spaceflight company was set up by new energy vehicle maker Tesla's founder Elon Musk, and it is focused on designing, manufacturing and launching rockets and spacecraft.

The company has completed its 18th launch this year, and will increase its launches in the next year. Its clients will include commercial satellite operators, military organizations and NASA.

Launching recyclable spacecraft is the company's advantage as it can reduce costs and help attract more clients. SpaceX initially recycled the Falcon 9's first rocket in Dec 21, 2015.

Currently, the company's value is $21.5 billion.