AI music generation startup Suno announced a $400 million Series D round on Wednesday, more than doubling its valuation from $2.45 billion just seven months ago to $5.4 billion. The round was led by Bond Capital, alongside IVP, Forerunner, Union Square Ventures, Alkeon, and Quiet, with existing investors Matrix, Lightspeed, and Menlo Ventures also participating.

The raise comes despite significant legal headwinds. Universal Music Group and Sony are actively suing Suno over copyright infringement, recently expanding their complaint to allege over 61,000 additional copyrighted works were used in training without permission. Warner Music Group settled and reached a licensing deal with Suno last November.

Investors appear undeterred by the litigation. Users generate over 7 million songs daily on the platform, which consistently remains highly ranked on App Store charts in the music category globally.

Suno CEO Mikey Shulman said the funding will accelerate music creation tools for both professionals and first-time creators, and teased an upcoming music model developed in partnership with the industry.