Early Career and Braintree
Bryan Johnson first gained significant wealth by founding Braintree, a payment processing company. He started the company in 2007 and grew it into a major platform. In 2013, he sold Braintree to PayPal for approximately $800 million, providing the capital that launched his later ventures.
Kernel and Neuroscience Investments
After the PayPal acquisition, Johnson founded Kernel, a company developing advanced brain-computer interfaces. He also established OS Fund, a venture capital firm investing in early-stage science and technology companies. These ventures focus on high-risk, high-reward sectors like neuroscience and artificial intelligence.
Current Ventures and Public Profile
Johnson remains active in tech and finance through his investment firm and public advocacy for longevity science. He is known for sharing detailed personal health data and promoting radical life extension research. His public profile continues to attract attention from investors and the scientific community.
