Inside Anthropic’s $65B Series H: The World’s Most Valuable AI Startup

Anthropic, the San Francisco-based AI safety company behind Claude, has closed a monumental $65 billion Series H funding round, vaulting its post-money valuation to $965 billion and officially making it the world’s most valuable private AI startup. Announced on May 28, 2026, the round was led by Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital, with co-leads including Capital Group, Coatue, D1 Capital Partners, GIC, ICONIQ, and XN . The sheer scale cements Anthropic’s sprint from high-stakes research lab to a potential trillion-dollar public company, all in the span of a single quarter.

The Series H Round: Key Investors and Structure

Anthropic’s Series H attracted a broad coalition of lead and participating investors. Alongside the four lead firms—Altimeter, Dragoneer, Greenoaks, and Sequoia—the round’s co-lead investors included Capital Group, Coatue, D1 Capital Partners, Singapore’ sovereign wealth fund GIC, ICONIQ, and XN . A substantial list of additional backers joined the round: Blackstone, DST Global, Brookfield, Baillie Gifford, Fidelity Management & Research Company, General Catalyst, Insight Partners, Jane Street, and Lightspeed Venture Partners, among others . Infrastructure partners Samsung, SK Hynix, and Micron also participated, signaling the deep hardware alliances required for AI compute at this scale .

Notably, the round included $15 billion in previously committed hyperscaler investments, with $5 billion from Amazon specifically. Amazon had earlier outlined plans to invest up to $25 billion total, as Anthropic commits to spending more than $100 billion over the next decade on its cloud infrastructure .

From $380B to $965B in Three Months

Anthropic’s valuation trajectory is unprecedented. Just three months prior, in February 2026, the company closed its Series G round: $30 billion raised at a $380 billion post-money valuation, which was then the largest VC deal of 2026 and the second-largest private tech financing in history . That round was led by GIC and Coatue, with co-leads D.E. Shaw Ventures, Dragoneer, Founders Fund, ICONIQ, and MGX .

The jump from $380 billion to $965 billion represents a valuation more than doubling in roughly 90 days. It also means the Series H alone is larger than any single funding round in startup history, underscoring the capital intensity of frontier AI development .

The Financial Milestone: Projecting a First-Ever Profit

During investor discussions for this round, Anthropic shared internal financial projections that fundamentally shifted the narrative around AI startup economics. For the quarter ending June 2026, the company expects revenue of $10.9 billion, more than doubling the $4.8 billion it recorded in Q1 2026 . On that revenue, Anthrophic projects its first-ever quarterly operating profit of approximately $559 million—a milestone it had previously not expected to reach until 2028 .

The numbers imply an annualized revenue run rate of roughly $44 billion, placing Anthropic among the fastest-growing technology companies in history . However, the company itself has cautioned investors that it may not sustain profitability throughout the full year, given the massive and lumpy compute costs it has already committed to, including a heavy bill from its infrastructure agreements .

The Road to an IPO

Multiple outlets, including TechCrunch, report that this Series H is expected to be Anthropic’s final private fundraising before a public debut . If the company proceeds as anticipated, an IPO could arrive as early as Q4 2026. The rapid valuation climb and the freshly demonstrated path to operating profit create a compelling story for public-market investors, though the enormous capital requirements and the competitive pressure from rivals like OpenAI and xAI will keep the stakes high.

How Anthropic Compares to OpenAI

For the better part of the AI boom, OpenAI has been the benchmark for private AI valuations. That changed with this round. Anthropic’s $965 billion post-money valuation surpasses OpenAI’s reported $852 billion, making the Claude maker the most valuable private AI startup for the first time . The shift reflects not just Anthropic’s revenue acceleration but also the market’s bet on the safety-oriented, enterprise-focused approach Anthropic has championed since its founding.