[shmapf]

Can someone explain the maths to me?

His original plan was to donate 99% of his wealth to philanthropy. The problem was that would involve selling the majority of his fb shares, and he would no longer have control of the company. To solve this he would split the stock into voting and non voting rights which would allow him to sell the non voting ones and maintain control.

Now the claim is that the stock has increased so much this is no longer necessary. If I understand this correctly, that would mean that the excess shares he has over 50%, comprise 99% of his wealth, which can't be true because that excess is strictly less than 50%.

Or perhaps he's just conceded that he will actually give away control, it will just take 20 years to do so.

[artemisyna]

If I had to guess, Zuck is still planning on selling 99% of his shares over his lifetime. As part of that, he wants CZI to be funded for the next 20 years. The part of his shares over 50% (which by definition, is less than 99% of his wealth) can do that, so he is going to fund CZI from that in the immediate term.

[sigmar]

Looking at how the current share structure works[1], it seems possible that he knows some Class B will be sold to someone new and his % of vote control will go up. At least that's my speculation.

Following this to a crazy extreme (to make the mental math easy), if Zuck owned only class B shares and he was the only one with class B shares, he could sell until his equity was 9.1% of FB and would still maintain majority control.

For more realistic math- is there any place that tracks how many class b shares exist?

[1] http://www.slate.com/articles/business/moneybox/2012/02/face...