Aehr Test Systems: Still Some Worry About The Blue-Sky Bull Case

Aehr Test Systems, Inc. has shifted its narrative from an EV supplier to a diversified AI-driven growth story. FY27 guidance projects 160–200% revenue growth, driven by AI accelerators, CPUs, and network processors, but customer concentration remains a risk. AEHR stock's valuation is high at ~18x FY27 revenue and ~45x gross profit, yet comparable to other AI winners if growth persists. Key concerns include reliance on a lead customer and uncertainty whether wafer-level test and burn-in, or WLTBI, becomes an industry standard. I've been far too conservative on Aehr Test Systems, Inc. (AEHR) stock, passing on shares twice only to see the stock more than triple since my original piece a year ago.