John Krystynak

About John Krystynak

John Krystynak cofounded AppLovin, which makes mobile games and provides marketing services to app developers.

He served as AppLovin's chief technology officer until 2020 but left the company a year before its IPO in 2021.

Forbes estimates that Krystynak has sold off nearly four-fifths of his 8% pre-IPO stake for more than $1 billion (pre-tax) since AppLovin went public.

He is one of eight billionaires from AppLovin, which has seen its market capitalization more than triple since going public at a $25 billion valuation.