Al-Humaidhi has led Boubyan Capital as CEO since 2022, overseeing $3.4 billion in assets under management in 2025. That year, Boubyan Capital executed approximately $550 million in private placement transactions and launched a venture capital arm with investments in three regional fintech startups, including Kuwait's first buy-now-pay-later ‘deema’ provider. Al-Humaidhi previously worked with NBK Wealth (formerly NBK Capital).