There seems to be multiple entities:

Raspberry Pi Ltd - No.08207441 (the one who received this "investment")

Raspberry Pi Foundation - No.06758215 (registered charity)

Raspberry Pi Foundation North America - (registered 501(c)(3))

https://www.raspberrypi.org/about/

Going by the 2022 accounts linked in another comment, the Raspberry Pi Foundation is the charitable part, and owns 91% of Raspberry Pi Ltd (the commercial entity that makes and sells SBCs, and the subject of the ARM press release) via another company ("Raspberry Pi MidCo Ltd").

[Edit: The link wasn't in another comment, was searched for: https://static.raspberrypi.org/files/about/RaspberryPiFounda... ]