The vlaue of billionaire entrepreneur Elon Musk's SpaceX has risen to $33.3 billion, people familiar with the company’s recent fundraising told CNBC.

In an amendment of its April fundraising effort, a filing last week from SpaceX showed the company’s latest round brought in $536 million at a price of $204 a share, CNBC said. 

SpaceX’s valuation has risen steadily as the company has raised funding rockets, spacecraft and more over the past decade.

SpaceX has raised more than $1 billion in financing in the last six months as it aims to roll out an ambitious high-speed internet service by using a constellation of satellites to beam signals from space, Reuters has reported.

The company raised $486.2 million in an equity offering, starting December, and another $535.7 million in an offering that began in April, its regulatory filings last week showed.

The rocket company recently launched the first batch of 60 small satellites into low-Earth orbit for Musk's new Starlink internet service.

Musk sees the Starlink venture as an important new revenue stream for his California-based company, whose launch service income he expects to top out at around $3 billion a year.

At least 12 launches carrying similar payloads are needed to achieve constant internet coverage of most of the world, Musk said. For now, Starlink is only authorized for U.S. operations.

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