He owns a different type of share from the common stock which gives him extra voting power. Each share he owns gives him 10 votes, and each share that you can buy gives you 1 vote.
He set it up that way to give him control of the company forever.
> The Facebook shares that you and I, along with big investors like mutual funds, can buy are Class A shares, of which there are roughly 2.4 billion in the market. We get one vote for each share. But Zuckerberg and a select group of others own Class B shares, which afford them 10 votes per share. There are roughly 440 million Class B shares.
>Zuckerberg personally owns nearly 360 million Class B shares, and through agreements with other Class B shareholders, controls the vote of another 32 million. That gives him control of some 392 million Class B Shares, some 90% of the total.
Multiple classes of share with different voting rights, so while he doesn't own 50.1% of the company he does have overall voting control of the company.
He set it up that way to give him control of the company forever.
Source: https://www.morningstar.com/articles/1061237/how-facebook-si...
> The Facebook shares that you and I, along with big investors like mutual funds, can buy are Class A shares, of which there are roughly 2.4 billion in the market. We get one vote for each share. But Zuckerberg and a select group of others own Class B shares, which afford them 10 votes per share. There are roughly 440 million Class B shares.
>Zuckerberg personally owns nearly 360 million Class B shares, and through agreements with other Class B shareholders, controls the vote of another 32 million. That gives him control of some 392 million Class B Shares, some 90% of the total.