Anthropic completed a $65 billion Series H funding round on May 28, 2026, bringing its post-money valuation to $965 billion and surpassing OpenAI as the highest-valued AI company in Silicon Valley. The round was led by Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital. The funding follows Anthropic's achievement of $47 billion in annualized recurring revenue (ARR) in early May 2026, driven by growing global enterprise adoption of its Claude AI assistant since the company's Series G round in February. This milestone positions Anthropic ahead of OpenAI, which reached an $852 billion valuation after a record $122 billion funding round in late March 2026.
Anthropic Secures $65 Billion Series H Led by Four Major Investors
According to Anthropic's official announcement on May 28, the Series H round was led by Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital. Additional investors include D.E. Shaw Group, Blackstone, and Temasek. The funding also incorporates $15 billion in previously committed investments from hyperscale cloud service providers, including $5 billion from Amazon. Memory chip manufacturers Micron, Samsung, and SK Hynix participated in the round as well.
Company Reports $47 Billion ARR and Plans Research and Compute Expansion
Anthropic's annualized recurring revenue surpassed $47 billion in early May 2026, reflecting continued growth in enterprise client adoption since the company's Series G round in February. Chief Financial Officer Krishna Rao stated: "Claude is becoming increasingly indispensable to our growing global customer community. This funding will help us meet the unprecedented market demand we're seeing today, stay at the forefront of research, and bring Claude to even more work scenarios."
The company plans to use the new capital to advance safety and interpretability research, expand compute capacity to meet rising demand for its core Claude product, and scale products and partnerships that customers rely on.
Anthropic Launches Claude Opus 4.8 on May 28
On the same day as the funding announcement, Anthropic released Claude Opus 4.8, its new flagship large language model. According to the company, the model demonstrates improved capabilities in agentic tasks, advanced coding, and "honesty and self-correction." Anthropic also plans to more broadly release models with performance comparable to Mythos, its powerful cybersecurity model that has been available only in limited release due to potential security concerns.
Brad Gerstner, founder and CEO of Altimeter Capital, commented: "The latest advancements in Claude are driving large-scale adoption within the world's most demanding organizations. This momentum positions Anthropic to lead the next phase of AI innovation and capture the tremendous opportunity ahead."
Anthropic and OpenAI Both Prepare for Public Listings
Anthropic was founded in 2021 and has been in direct competition with OpenAI for funding and user growth. Both companies are currently preparing for initial public offerings. Foreign media reports indicate that OpenAI may list as early as September 2026. Anthropic has been active since February 2026, launching Claude Cowork to automate common business processes and experiencing a public conflict with the U.S. government after being placed on a Pentagon blacklist.
FAQ
What valuation did Anthropic reach after its Series H funding round?
Anthropic's post-money valuation reached $965 billion following the completion of its $65 billion Series H funding round on May 28, 2026, surpassing OpenAI's $852 billion valuation from March 2026.
Who led Anthropic's $65 billion Series H funding round?
The Series H round was led by Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital, with additional participation from D.E. Shaw Group, Blackstone, Temasek, hyperscale cloud providers (including a $5 billion commitment from Amazon), and memory chip makers Micron, Samsung, and SK Hynix.
What is Anthropic's annualized recurring revenue as of May 2026?
Anthropic's annualized recurring revenue (ARR) surpassed $47 billion in early May 2026, driven by growing global enterprise adoption of its Claude AI assistant.
