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, the space exploration company led by tech billionaire Elon Musk, said in Tuesday that it has raised another $1.9 billion in funding.

The latest capital infusion follows a string of recent successes at the Hawthorne, California-based company. It is also SpaceX’s largest-ever funding and brings its total raised to date to $5.4 billion, according to ¸½½üÉÏÃÅ data.

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The company has not disclosed who the investors are in its latest round, which was by .Ìý

cited sources familiar with the deal when it that SpaceX was raising new capital and that the company had increased the size of the offering due to strong investor demand.Ìý

The latest round brings SpaceX’s equity value to $46 billion, Bloomberg reported. That ranks SpaceX among the U.S.’ most valuable venture-backed companies, according to ¸½½üÉÏÃÅ data.Ìý

It’s not clear who all of the investors are in the funding, although Bloomberg reported that existing investor is among the largest participants. Fidelity declined to comment to the publication.

Other previous investors in SpaceX include , parent , Peter Thiel’s , and , according to ¸½½üÉÏÃÅ data.

SpaceX has notched several recent successes, a fact that likely drew investor interest as it embarks on further capital-intensive endeavours.Ìý

Earlier this month, its Dragon 2 reusable spacecraft returned two astronauts to Earth following the end of a two-month trip to the International Space Station—marking the completion of the first-ever human spaceflight mission by a private company launched from the U.S., as well as the first trip for American astronauts to the ISS since 2011.

On Tuesday, SpaceX . Its ultimate goal is to create a constellation of thousands of the broadband internet-beaming satellites in low orbit.Ìý

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