Thrive Capital’s first investor letter shows how completely OpenAI has come to define it

This article was published on August 14, 2026 Joshua Kushner’s Thrive Capital has sent its first formal letter to investors, and the standout figure captures the AI era in miniature. One of its funds has swelled to about $3.7bn in value, driven overwhelmingly by early bets on OpenAI and SpaceX. The letter, reported by Bloomberg, reads as a victory lap and a quiet hedge at the same time. That Thrive is writing to its backers at all is notable in itself. Kushner has built one of the most secretive and sought-after firms in venture capital, so a formal letter, complete with hard marks and a candid line on concentration, is a departure that doubles as a statement of confidence. It also lands at a moment when the whole industry is arguing about whether AI valuations reflect real value or collective hope, which makes a firm this exposed to a single name showing its workings all the more striking. Thrive’s OpenAI position is practically a chronicle of the boom. The firm first backed the company in 2022 at a $29bn valuation, led a tender the following year at $86bn, and has since committed around a billion dollars more across rounds that valued OpenAI at $150bn and then $285bn. With the co