Early Career and Braintree Sale
Bryan Johnson started his career in sales and founded OS Fund in 2014 to back science-driven companies Forbes. He later launched Braintree, a mobile payment processor, and grew it into a major fintech platform. In 2013, PayPal acquired Braintree for about $800 million, with $300 million in cash and $500 million in PayPal stock Forbes. This acquisition created the core of his liquid net worth and gave him capital to invest and launch new ventures.
After the Braintree deal, Bryan Johnson used the proceeds to fund Kernel and OS Fund, focusing on neuroscience and deep-tech startups Forbes. He positioned himself as a longevity-focused investor and entrepreneur, aiming to apply hard science to aging and human performance.
Kernel, OS Fund, and Longevity Investments
Kernel and Neuroscience Technology
Bryan Johnson founded Kernel in 2016 to build noninvasive brain interfaces for research and potential commercial use Forbes. Kernel raised multiple funding rounds from venture firms and personal capital, with Johnson as the primary backer. The company targets brain data platforms and health applications, though it remains in a research and development phase rather than a high-revenue business.
OS Fund Portfolio and Returns
OS Fund, launched in 2014, invests in early-stage companies working on synthetic biology, advanced materials, and AI Forbes. Johnson has publicly shared some portfolio companies and emphasized data-driven decision making. Returns from OS Fund are not fully disclosed, but the fund has backed multiple startups that later raised larger rounds or were acquired.
Current Net Worth and Business Activities
Public Estimates of Bryan Johnson Wealth
Public estimates place Bryan Johnson's net worth in the hundreds of millions, largely tied to the PayPal acquisition proceeds and his equity in Kernel and OS Fund Forbes. He has also invested in real estate and other assets, though he is not among the top-ranked billionaires on major lists. His wealth remains mostly illiquid, tied to private company stakes.
Recent Projects and Public Profile
Bryan Johnson continues to promote longevity science, publishing books and speaking at conferences on aging and human optimization For