Anthropic has acquired Coefficient Bio, a six-person stealth startup co-founded by former Genentech machine learning researchers, in an approximately $400 million stock deal. The company, barely eight months old at the time of purchase, will join Anthropic's health and life sciences team — an effort that began with the October 2025 launch of Claude Life Sciences for biopharma professionals. The acquisition marks Anthropic's first move to own biotech AI capabilities internally rather than serve the sector purely through API access, as reported by TechCrunch and FierceBiotech.