It's an interesting question... Let's assume for purpose of shareholders, I believe Zuckerburg (famously) has majority interest in voting shares. In practice

It's an interesting question... Let's assume for purpose of shareholders, I believe Zuckerburg (famously) has majority interest in voting shares. In practice that should mean he controls who is on the board should they not vote in alignment with his preferences; however, certainly there could be other agreements/contracts the guarantee board seats here and there, that should all be available as a public company I just haven't looked. At minimum, one would "assume" Facebook required board approval of a $1B+ acquisition.