I think Txiki is the man on the ground so to speak, but it goes al the way up to Khaldoon. We know from All or Nothing too that there's a committee of sorts.Is it not Omar Berrada ?
I imagine Ferran and even Khaldoon would get involved in certain deals.
The Athletic article on Grealish said that Khaldoon was the one that led the negotiations, going above their CEO's head straight to their owner.