Shares of Alpha & Omega Semiconductor (AOSL) plummeted 21.75% in after-hours trading following the release of its fiscal third-quarter 2026 financial results.

The power semiconductor supplier reported a net loss that widened to $13.8 million, or $0.46 per diluted share, compared to a loss of $10.8 million a year earlier. Revenue dipped 0.5% year-over-year to $163.8 million, while the gross margin contracted. The company's adjusted loss per share came in at $0.28, which was worse than the prior quarter and the year-ago period. For the upcoming fourth quarter, the company provided a revenue forecast of approximately $168 million, plus or minus $10 million.

Management cited strength in advanced computing segments, including AI and servers, but noted ongoing weakness in consumer applications and seasonal softness in the PC market. Analyst sentiment remains cautious, with a median price target significantly below the stock's pre-earnings closing price.