Anthropic Acquires Coefficient Bio for $400 Million

Anthropic, the AI research company behind the Claude models, has acquired Coefficient Bio, a stealth startup focused on artificial intelligence for biological research, in a stock deal valued at approximately $400 million. The transaction, reported on April 3, 2026, brings a team of fewer than 10 experts into Anthropic's healthcare and life sciences division, marking the company's most significant expansion into computational drug discovery to date.

Coefficient Bio was founded about eight months earlier by Samuel Stanton and Nathan C. Frey, both former researchers at Genentech's Prescient Design unit, which specializes in computational drug discovery. The team, drawn largely from that group, concentrated on developing AI models tailored to biology, including protein design, biomolecule modeling, and foundation models for scientific applications. According to internal materials reviewed by industry observers, the startup aimed to create tools that could automate high-impact research tasks, such as drafting drug development plans, managing clinical strategies, and identifying potential drug candidates. Despite operating without a public product or disclosed revenue, the company's...