Anthropic has reached a $1.2 trillion implied valuation on secondary markets, overtaking rival OpenAI and setting what trading platform Caplight calls the most intense investor demand it has ever tracked in the venture secondary market.

Secondary trades in Anthropic shares are clearing at the $1.2 trillion level, according to Caplight CEO Javier Avalos, who described Anthropic as “the most sought-after company the venture secondary market has ever seen.” Rainmaker Securities CEO Glen Anderson confirmed transactions at the same price point but noted that completed deals are rare: demand outstrips supply so heavily that it’s difficult to get a trade done because almost no shareholders are willing to sell.

The figure marks a 550% increase from Anthropic’s secondary market valuation a year ago, and it sits 24% above the company’s own last primary round pricing. In late May 2026, Anthropic closed a $65 billion Series H at a $965 billion post-money valuation, disclosing that its annualized revenue run rate had crossed $47 billion, up from $9 billion at the end of 2025.

OpenAI Has Lost the Lead

OpenAI, which commanded a higher market valuation than Anthropic for most of the past two years, now trades at around $908 billion on secondary markets according to Caplight data. That reversal reflects a meaningful shift in enterprise contract flow.

Demand between the two companies has diverged. Avalos put the ratio at approximately five prospective Anthropic buyers for every two looking at OpenAI, a ratio that tells its own story about which direction enterprise adoption is moving.

Why Secondary Prices Are Running Above the Primary Round

Secondary markets normally price private companies at a discount to their last fundraise, reflecting illiquidity and uncertainty. Anthropic is an exception, with secondary prices above its own stated $965 billion valuation.

The explanation is straightforward: Anthropic filed a confidential IPO prospectus with the SEC in early June 2026, a move that points toward one of the largest public listings in history if the valuation holds through a roadshow. Existing shareholders who might otherwise sell into the secondary market are now sitting on shares that could be worth more in a public exit months away, so almost no one is selling.

The result is a market where buyers compete intensely for the small number of shares that do come available, which pushes the implied price higher than the primary round itself.

What This Means for Business

For business leaders choosing which AI platform to build on, secondary market prices are a reflection of where real enterprise contracts are flowing, not a cause of that flow.

Claude’s practical advantages in agentic workflows, its widely adopted Model Context Protocol, and its consistent reliability in high-stakes production settings are the underlying reasons contracts are going Anthropic’s way. Businesses that built on Claude’s API in 2025 have expanded usage throughout 2026 as those workflows proved durable. That embedded usage is what makes the revenue run rate grow, and what makes investors unwilling to sell at any price.

The $1.2 trillion figure says something specific: the AI market has a new leader in investor confidence, and the gap between Anthropic and OpenAI is widening in Anthropic’s favor. For any company that has been tracking the AI vendor landscape passively, this is a useful moment to look more carefully at what Claude is actually being deployed to do inside the enterprises that are driving that adoption.

The tools that power those deployments are the same tools any business can access today.