Kylie Jenner — Kylie Cosmetics ($900 Million)

Kylie Jenner's business acumen is undeniable despite the self-made debate, as she achieved a $600 million exit before age 23 with a team of just seven people. Forbes controversially named her the youngest self-made billionaire at 21 after Kylie Lip Kits sold out in 30 seconds, generating $360 million in annual revenue within 18 months. Even after Forbes revised her billionaire status downward due to inflated financials, her execution outperforms the average startup exitby 10x.