[steve1977]

> Here's the Handelsregisterauszug for Proton, which shows ownership

It doesn‘t. It’s a joint-stock corporation and while the shareholders are registered, the register is not public.

[InsideOutSanta]

Proton discloses shareholder information here: https://proton.me/support/who-owns-protonmail

But I guess they could be lying.

[ddtaylor]

Them providing information isn't the same as publicly verifiable information.