Shares of Ultra Clean Holdings Inc. (UCTT) tumbled 7.31% in after-hours trading on Tuesday following the release of its third-quarter 2025 financial results and fourth-quarter guidance. The semiconductor equipment maker reported a net loss and provided an outlook that may have fallen short of investor expectations.

For the third quarter, Ultra Clean posted revenue of $510 million, slightly above the analyst estimate of $505.2 million. However, the company reported a GAAP net loss of $10.9 million, or $8.1 million on an adjusted basis. The adjusted earnings per share came in at $0.28, but the market's reaction suggests this might have disappointed investors who were possibly looking for stronger profitability.

Adding to the bearish sentiment, Ultra Clean's fourth-quarter guidance appeared to be below market expectations. The company forecasts Q4 revenue between $480 million and $530 million, with adjusted earnings per share in the range of $0.11 to $0.31. The midpoint of the EPS guidance ($0.21) falls short of the consensus estimate of $0.24, potentially contributing to the stock's sharp decline. Investors seem to be concerned about the company's near-term growth prospects and profitability in the face of ongoing challenges in the semiconductor industry.