6 September 2026

IBM sold Watson Health cancer AI division for $1 billion loss

• IBM invested nearly $4 billion building Watson Health, an AI system meant to help doctors treat cancer patients worldwide, after Watson won Jeopardy in 2011.
• The system failed in real hospitals, giving wrong or unsafe treatment suggestions and only matching doctor decisions 33% of the time in Danish testing.
• IBM sold Watson Health to Francisco Partners in 2022 for roughly $1 billion, losing about three-quarters of its original investment.

How it was covered

MindstreamAdam Biddlecombe

IBM spent nearly $4 billion acquiring companies to build Watson Health, an AI system intended to make oncology accessible worldwide after Watson won Jeopardy in 2011. However, the system proved unreliable in real clinical settings, struggling with complex patient cases, recommending incorrect or dangerous treatments, and achieving only 33% agreement with Danish doctors. IBM sold the division to Francisco Partners for roughly $1 billion in 2022, representing a quarter of its initial investment.