Er, that's not how splits work. After the 3:1 split you have described, he would still own exactly the same percentage of Facebook, and any sale would change hi

Er, that's not how splits work. After the 3:1 split you have described, he would still own exactly the same percentage of Facebook, and any sale would change his percentage of control. Extra ownership is not created from thin air in a split. It's exactly the same proportion of ownership as before, there are just more (quantity of) shares. Two-thirds of post-split shares is identical in value to two-thirds of pre-split shares. To be clear I'm responding to what you've described, which is not what I understand the announcement to propose (it instead proposes a new voting class).