SpaceX Corp. disclosed in a regulatory filing today that it has raised $337.4 million in equity financing.

The company, whose backers include Fidelity Investments and Google LLC parent firm Alphabet Inc., saw its value reach $100 billion in October following a secondary share sale. Prior to that, it raised about $1.16 billion in April through another equity funding round.

SpaceX, which is owned and led by the billionaire Elon Musk, competes with former Amazon.com Inc. Chief Executive Jeff Bezos’ space venture firm Blue Origin LLC, as well as Richard Branson’s Virgin Galactic LLC in the commercial rocket venture space.

The three companies are aiming to make money through the idea of space tourism and each has successfully launched civilians into space. SpaceX is also planning a private mission with Axiom Space to fly four passengers to the International Space Station for eight days early next year. It has been reported that the passengers will pay $55 million for the trip.

Space tourism is expensive, and Morgan Stanley forecasts that the space economy could be worth as much as $1 trillion a year by 2040.

Musk, who owns other high-profile companies, including the electric car maker Tesla Inc., brain interface tech firm Neuralink Corp. and infrastructure services company Boring Co., has also claimed SpaceX intends to land its Starship rockets on Mars before the end of the decade.

SpaceX earns revenue by carrying cargo payloads and astronauts to the ISS on behalf of the National Aeronautics and Space Administration. It also operates a burgeoning satellite constellation service, providing fast internet connectivity to remote areas of the world. It currently has around 1,700 satellites in orbit and ultimately intends to get more than 30,000 up into the skies.

Photo: Official SpaceX Photos/Flickr