$AEHR and $ONTO: Contrasting Paths in the AI Semiconductor Equipment Space AEHR is a smaller, higher-growth semiconductor test and burn-in specialist that has surged sharply in recent months on AI-related demand, trading at a premium valuation. ONTO is a larger, profitable process-control leader with a record backlog and stronger, more diversified revenue base. Both stocks benefit from AI, advanced packaging, and high-bandwidth memory (HBM) trends, but they occupy different positions in the semiconductor equipment value chain. AEHR is a turnaround story pivoting toward AI processors and silicon photonics; ONTO is a more established compounder with demonstrated profitability and cash generation.