His 500,000 class a shares were a part of the ipo offering, so they were directly sold with the ipo. He still has 4.1 million class b shares which have greater voting rights than class a shares. So the people in this thread saying he’s sold all of his stock aren’t correct, though he did sell all of his class a shares that are being traded in the public market for the ipo. It’s all in sec filings as part of the ipo. You can see here who sold as part of the ipo and how much, and where all the ipo shares are coming from. Some were created to raise money for the company, others were already existing shares being sold by those who already held shares before the ipo. They wouldn’t be able to sell after the market actually opened, that’s where lockup periods come in, and it’s 180 days in this case. The sale price of these shares was negotiated as part of the ipo before it was trading on the exchange. Now any still held are locked up for that period.