Inhibitor181 (aka Cosmin) is the first bug bounty hunter to earn more than $2,000,000 in bounty awards through the vulnerability coordination and bug bounty program HackerOne. The first millionaire hacker, 19-year-old Argentinian Santiago Lopez, was announced by HackerOne in March 2019. HackerOne says that, so far, only 9 bug bounty hunters have earned $1 million on the platform, with Jon Colston being the ninth hacker to reach this goal after reporting over 170 vulnerabilities in government and enterprise organizations.
Source: https://www.bleepingcomputer.com/news/security/hacker-earns-2-million-in-bug-bounties-on-hackerone/