The WBU can be yours for £850k - it is up for sale because the TV networks aren't allowing those fights anymore.
It's fairly easy to find out who the presidents are (Sulimain-WBC, Muhammed - IBF) but I guess there probably owned but lots of shareholders, not one person, so who knows.
They are all "independent" aren't they? If the OP wants to know, he can look this stuff up and report back to us here. Not many here care because we see the results and don't care about them.