As far as I know there is no excat unicode value for where to place my foundry logo in the font.
The Private use Area
Why do you even need to do that?
U+F8FF seems to be semi-traditional for branding, logos and the like.
That’s what I’ve always done.
Just to clarify: U+F8FF is a particular codepoint in the private use area.
As is U+F000 where a gnawed apple may sometimes be found.