Anthropic shares surging on secondary markets with $25M minimum buy-in

The most coveted asset in private markets right now is not a late-stage tech unicorn or a buzzy fintech. It is a piece of Anthropic, and getting it will cost you at least $25 million just to sit at the table. Secondary market demand for Anthropic shares has reached levels that are genuinely difficult to describe without resorting to superlatives. According to pre-IPO market sources cited by Fortune, buyer demand is running at roughly five interested parties for every two investors seeking OpenAI shares on certain trading platforms. A valuation trajectory that rewrites the record books Anthropic closed a $65 billion Series H funding round in May 2026, setting a primary post-money valuation of $965 billion. By early July 2026, implied valuations on platforms like Caplight and Rainmaker Securities had climbed to $1.2 trillion, with some transactions reportedly suggesting a ceiling closer to $1.5 trillion. To put that in perspective, $1.5 trillion would place Anthropic above OpenAI’s secondary-market valuation of roughly $908 billion. The year-over-year move represents a roughly 550% increase. The catch is that most retail investors cannot participate. Minimum investments in special pu...