Shares of Super Micro Computer (NASDAQ: SMCI) surged nearly 20% on July 22, 2026, closing at $30.56 after the AI server maker released a preliminary fourth-quarter update that blew past Wall Street's profitability expectations.
Trading volume reached 159.3 million shares — more than triple the stock's three-month average of 52.4 million — as investors reacted to two standout numbers in the update.
A record order backlog
Supermicro said its backlog of new orders has grown to record levels, with total new orders exceeding $60 billion during the fiscal fourth quarter. The company pointed to strong demand for its liquid-cooled AI server racks as the primary driver, as hyperscalers and enterprise customers continue to build out AI infrastructure.
A surprise margin beat
Alongside the order growth, Supermicro raised its gross margin guidance for the quarter ended June 30, 2026, to a range of 15% to 17% — nearly double its prior guidance of 8.2% to 8.4%. The company attributed the improvement to a more favorable mix of customers and products.
Revenue for the quarter came in at the low end of prior guidance, a detail some analysts flagged as a short-term concern. However, the scale of the margin improvement, combined with the record backlog, was enough to outweigh that caveat for most investors.
Ripple effects across the sector
The rally wasn't confined to Supermicro. Server and infrastructure peers Dell Technologies and Hewlett Packard Enterprise also gained on the news, up 9.32% and 3.02% respectively, reflecting broader investor enthusiasm for the ongoing AI infrastructure buildout.
What's next
Supermicro is expected to report confirmed fiscal Q4 results on August 11, 2026, when investors will get a clearer picture of order conversion rates and whether the improved margins hold. The company's earlier announcement of a $7 billion financing plan may also come back into focus as it looks to fund continued capacity expansion.