Super Micro said fourth quarter revenue will be at the low end of its guidance of $11 billion to $12.5 billion. Wall Street was looking for $11.73 billion. Non-GAAP gross margins will be between 15% to 17%, which is well ahead of the 8.2% and 8.4% guidance. The company received new orders worth $60 billion in the fourth quarter.

Overall, the preliminary report is mixed, but 16% of the shares are sold short. With that many traders leaning the wrong way, shares surged 15% in after hours trading.