It is not a requirement in North America, but in the EU privately held companies are required to publish annual revenue data and balance sheets provided they meet certain minimum criteria (over 50 employees, I think).
Yes, there was a bit of a musical chairs, it looks like, with Dominic Williams being the only constant presence. The latest change makes him, as far as I can tell, a sole signatory, but I am not sure what that means and if something is lost in translation.
I don’t think it is the most pressing issue either, but I find Dfinity’s reluctance to release relevant data instructive (and this involves not just the present thread but its history since mainnet launch). I have started to think of the IC as being controlled by a secretive organisation headed by an erratic leader invested with extraordinary power. However, great the tech, this is not the recipe for a successful decentralised public blockchain. I suspect that as the months and years roll on, the importance of transparency will rise from a 6 to an 8 or 9.