OpenAI generated $24.1 billion of Microsoft's $331.8 billion in FY2026 revenue, roughly 7.26% of the company's total, according to disclosures in Microsoft's most recent earnings. Bloomberg's analysis, extrapolating from Microsoft's reported 123% AI growth rate in March, puts OpenAI's share at approximately 70% of Microsoft's total AI revenue for the fiscal year ending June 2026. Microsoft also carried $6.0 billion in accounts receivable from OpenAI as of June 30, 2026.
Microsoft has spent $261.3 billion in capital expenditures since the start of 2022, the bulk of it building infrastructure that disproportionately serves one client. That single-client concentration is the real story here, not the revenue numbers. The piece details exactly how Bloomberg reverse-engineered Microsoft's AI totals from partial disclosures, which is worth reading to understand how opaque these figures actually are.
Four years into the AI investment cycle, Microsoft's broader AI portfolio has not produced diversified revenue growth to match its infrastructure spend. The original piece connects this disclosure to a wider argument about OpenAI and Anthropic dominating AI revenues across Microsoft, Google, and Amazon combined. Read it to understand what happens when that concentration unwinds.
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