Aehr Test Systems (NASDAQ: AEHR), a small company in the semiconductor industry, has been indisputably one of the market’s best performers of 2026. During the year, AEHR is one of just five stocks in the Russell 3000 Index to deliver a return of more than 200%.
Understanding the scope of the Russell 3000 helps put this into perspective. The index measures the performance of the 3,000 largest U.S. stocks, representing around 98% of the investable U.S. equity market. Because of this, many consider the Russell 3000 to be the most comprehensive gauge of the U.S. stock market. This shows just how big a standout AEHR has been in 2026.
The company, which makes equipment to stress test the performance of semiconductors, has announced multiple deals throughout the year. And, despite posting mixed results in its latest earnings report, the stock surged by nearly 26% afterward. Let’s dive into what’s driving Aehr’s explosive gains and what investors should consider going forward.
