Ultra Clean Holdings (UCTT) reported fiscal Q1 adjusted earnings late Monday of $0.28 per diluted share, up from $0.27 a year earlier.

Four analysts polled by FactSet expected $0.39.

Revenue for the three months ended March 28 was $518.6 million, up from $477.7 million a year earlier. Four analysts expected $529.4 million.

For Q2, the company expects non-GAAP diluted EPS of $0.17 to $0.37 on revenue of $475 million to $525 million. Four analysts expect non-GAAP EPS of $0.39 on revenue of $529.4 million.

The company's shares were down 8% in recent after-market activity.