Microsoft reports fiscal Q3 results after Wednesday's close. The print's most consequential disclosure is unlikely to be the Azure growth rate. It will be the company's next update to its remaining performance obligations number — the contracted backlog Microsoft has booked but not yet delivered — and the share of that backlog that depends on a single counterparty: OpenAI. [1]

On the January call, Microsoft disclosed that 45% of its $625 billion remaining performance obligations was expected from OpenAI. [2] That figure, taken at face value, is roughly $281 billion of contracted future revenue tied to one customer's ability to pay over multiple years. The disclosure was new in January; Wednesday's number is the first refresh.

The accounting context has changed. Cerebras's S-1 refile, described in the paper Tuesday, names OpenAI as customer, lender, and prospective ten-percent shareholder under one corporate name. If Microsoft's Wednesday RPO number shows OpenAI's share rising, two AI vendors will be publicly tying multi-year revenue to the same counterparty — at IPO scale and at hyperscaler scale on the same week.

The framing question for analysts is what counts as concentration risk. Microsoft itself does not disclose concentration unless a single customer exceeds 10% of total revenue. RPO is forward-revenue language, which makes the OpenAI figure a procurement disclosure, not a concentration filing. [3] Wednesday's number will determine whether a credit committee, not a Wall Street analyst, is the right reader for Microsoft's next earnings deck.

-- DAVID CHEN, Beijing