For most of 2026, Microsoft was a cautionary tale. By June, shares had tumbled to around $349, a drop of roughly 25% from their prior highs, as investors grew increasingly impatient with the company’s enormous bets on AI infrastructure.
A single day that rewrote the record books
On July 30, 2026, Microsoft reported fiscal Q4 results for the quarter ending June 30. Revenue came in at $90 billion, an 18% jump year-over-year. Azure, the company’s cloud platform, grew 43% in the quarter and crossed $100 billion in annual revenue for the first time. The commercial backlog hit a record $678 billion.
Microsoft shares surged 15.51% on July 30, the largest single-day percentage gain in the company’s history. That move added approximately $450 billion to Microsoft’s market capitalization in a single session.
What the $678 billion backlog number actually signals is worth pausing on. A commercial backlog of that size means enterprises have already committed to paying Microsoft for services they haven’t yet received. It’s closer to a reservation list than a revenue forecast.
