Key Highlights

  • Super Micro Computer (NASDAQ:SMCI) traded at USD 35.99 on October 21, 2026, up 10.84%, after closing at USD 32.47 on October 20, with a market value of USD 23.336 billion, a P/E of 9.86 and a PEG of 0.11.
  • After the October 20 close the company raised preliminary revenue guidance for the quarter ended September 30 to USD 18.5 billion to USD 19.5 billion, from USD 14.5 billion to USD 15.5 billion.
  • Gross margin guidance rose to 12.0% to 12.5% from 10.4% to 10.8%; at the USD 19.0 billion midpoint that implies about USD 2.33 billion of gross profit, simple arithmetic.
  • Full fiscal first quarter results are due on November 3, 2026, and consensus is Hold, with an average target of USD 43.07, about 32.6% above the October 20 close, simple arithmetic.

What Changed Before the Open

After the close on October 20, 2026, Super Micro Computer (NASDAQ:SMCI) issued preliminary, unaudited figures for its fiscal first quarter. The revenue midpoint of USD 19.0 billion is about 26.7% above the earlier USD 15.0 billion midpoint, simple arithmetic. The stock closed at USD 32.47, traded near USD 37.54 in extended hours and was quoted about 12% to 13% higher before the open. Other AI server makers also rose, which suggests investors read the update as a sign of broad server demand. Early-session volume was 29.745 million shares against a 3-month average of 44.812 million, so turnover was still building. The quote of USD 35.99 is the intraday board price and sits below the premarket peak.

What the Valuation Figures Show

A P/E of 9.86 means investors pay about USD 9.86 for each USD 1 of trailing earnings, and a PEG of 0.11 implies a very large growth input, simple arithmetic. Both ratios use past earnings and forecasts made before the raise, so they can shift quickly once analysts update their models and the market reprices the stock. Management attributed the wider margin range to a favorable mix of customers and products. A server builder buys GPUs and other parts before customers pay, so faster growth can absorb cash. Fiscal 2026 revenue was about USD 39.1 billion, yet operating cash flow was negative by roughly USD 6.8 billion, and one customer was 28.1% of revenue.

Risks and What to Watch

The figures are preliminary and may change when audited results arrive on November 3. Mark Long was named finance chief on October 15 and the board added a director on October 20 as the governance reset continues. The chief executive sold 100,000 shares on October 10. Even after the jump, the stock is about 35% below the 52-week high of USD 55.35 and well above the low of USD 19.48, simple arithmetic. Investors should watch whether margins hold, how much cash the build-out consumes and whether the largest customer drove the raise. Insiders sold about USD 16.4 million of stock over three months with no purchases, which adds to the caution around the rally.

Where Things Stand

Super Micro Computer (NASDAQ:SMCI) is higher because it raised quarterly revenue guidance by about 27% at the midpoint and widened its gross margin range, which investors took as fresh evidence that AI server demand is strong. The low P/E and PEG reflect trailing earnings, not the raised outlook. The update is preliminary, cash flow has been negative and one customer is 28.1% of sales. The next catalyst is the November 3 report. This is not investment advice.