Cohu's stock experienced a sharp decline of 24.73% in the after-hours session following the release of its fourth-quarter financial results.

The semiconductor equipment company reported a GAAP net loss of $22.5 million for Q4 2025. A key driver of the sell-off was its adjusted earnings per share, which came in at a loss of $0.15, significantly missing the analyst consensus estimate for a profit of $0.06 per share.

While quarterly sales of $122.2 million slightly exceeded expectations and represented a year-over-year increase, the substantial bottom-line miss and reported net loss overshadowed the revenue performance, leading to negative investor sentiment after the market close.