Moskovitz owns about 53% of the company's outstanding shares, between his Class A and Class B holdings. He has substantially increased his ownership since the company's public market debut in 2020.
In 2023, following a dip across the tech sector, Moskovitz told CNBC that "It's been a wild two years in the market and there have been some interesting buying opportunities."
He has a total net worth of more than $16 billion, according to Forbes, mostly because of his early Facebook stake.
Moskovitz said in his Monday retirement statement that he plans to focus more on his philanthropic endeavors, such as Good Ventures and Open Philanthropy, which cites "potential risks from advanced AI" among its various focus areas. In 2010, Moskovitz signed the Giving Pledge, a promise by some of the wealthiest people in the world to donate most of their fortunes to charity.