Space is turning into the financial frontier.

A Silicon Valley startup that sent its first successful rocket to the International Space Station and is pioneering the commercialization of the solar system, SpaceX, is soaring in valuation, a new report suggests.

The company, founded by Elon Musk, is now worth $4.8 billion, double its value from April, according to a research report from PrivCo., expected to be released today.

The rocket-like success is the afterglow of the first commercial transit to the space station last month, and SpaceX’s lucrative NASA contracts.

The PrivCo. report finds shares in SpaceX are listed in private market auctions at an asking price of $18.50.

The research firm valued the shares at $20.

SpaceX said it is cash flow positive, and the company’s revenue was forecast to jump from more than $400 million this year to about $1.3 billion in 2015.