Elon Musk’s brain implant company, Neuralink, has reportedly raised $600 million in a new funding round that values the company at $9 billion pre-money, according to Semafor. The report, which cites anonymous sources, does not disclose the investors involved in this latest round.

This new funding follows a $43 million raise in November 2023 and a previous valuation of around $5 billion as of June 2023, according to earlier reports from Reuters. Bloomberg had previously reported in April that Neuralink was seeking to raise $500 million at an $8.5 billion valuation.

Neuralink, which is developing brain-computer interface technology, received “breakthrough device” designation from the U.S. Food and Drug Administration last year. So far, three people have received Neuralink’s brain implants. Most recently, a nonverbal patient shared a video showing how he uses the implant to edit and narrate YouTube videos using only his brain signals.

Neuralink has not publicly commented on the new funding round.