Amazon CEO Jeff Bezos is officially the world’s richest person, but much of his obscene wealth — now standing at nearly $95 billion dollars according to the Bloomberg Billionaires Index — is tied up in his company’s stock. That means that, every once in a while, Bezos converts that stock to cash, noting the amount in a Form 4 filing with the US Securities and Exchange Commission.
https://www.theverge.com/2017/11/3/16604990/amazon-ceo-jeff-bezos-stock-sale-1-billion