Microsoft recorded a $3.2 billion gain on its Anthropic investment during the fourth quarter of its fiscal year 2026, while simultaneously writing down its OpenAI stake by approximately $600 million, the company disclosed alongside its quarterly earnings report.
The figures emerged when Microsoft reported its fiscal fourth-quarter results for the period ending June 30, 2026. The Anthropic gain boosted diluted earnings per share by $0.33, while the OpenAI write-down reduced diluted EPS by about $0.07. Microsoft reported diluted EPS of $4.81 for the quarter.
Microsoft invested $5 billion in Anthropic in November 2025 as part of an agreement under which Anthropic also committed to purchasing $30 billion worth of Microsoft’s Azure cloud services. Unlike its OpenAI stake, Microsoft does not update the value of its Anthropic investment every quarter, making the disclosure notable.
Microsoft owns approximately 27% of OpenAI and also receives revenue-share payments from the company, though it does not publicly report the amount of those payments. Despite the quarterly decline, the OpenAI investment performed better over the full fiscal year, generating a $5 billion gain and adding $0.67 to EPS. Microsoft reported $17.95 EPS for the full fiscal year.
The quarterly Anthropic gain came close to matching the full-year OpenAI gain — a comparison Microsoft itself chose to highlight in its disclosure.
The investment figures were a footnote to an otherwise strong quarter for Microsoft. The company reported $90 billion in revenue and $35.8 billion in net income for the quarter. For the full fiscal year, Microsoft posted revenue of $331.8 billion and net income of $133.7 billion, making the $600 million OpenAI write-down a relatively minor impact on overall results.
Source: TechCrunch