The U.S. SEC filing has torn apart the facade of Microsoft's AI empire. For the fiscal year ending June 2026, OpenAI alone is expected to contribute $24.1 billion in revenue to Microsoft, accounting for as much as 70% of its AI income. The $37 billion annualized AI revenue that Microsoft CEO Satya Nadella keeps touting turns out to be propped up by a single customer. The timing of this 'first disclosure' is quite interesting—OpenAI is about to IPO, and Microsoft seems to be giving its ally a financial endorsement. But KeyBanc analysts aren't buying it: Is this genuine cloud service revenue, or just equity-for-investment-like returns? Microsoft's 'AI platform' narrative is starting to show structural cracks.