Microsoft Books $3.2B Gain From Anthropic Investment as OpenAI Delivers Mixed Results

Microsoft reported a $3.2 billion gain from its investment in Anthropic as part of its fourth-quarter fiscal 2026 earnings (period ending June 30). Its stake in rival AI lab OpenAI delivered mixed financial results in the same period. The disclosure offers the clearest picture yet of how Microsoft's bets on the two leading AI labs are performing.