Advanced Energy Industries Inc. Common Stock (AEIS) : juste valeur

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Advanced Energy Industries makes precision power conversion and control products, including the RF and DC power supplies that semiconductor etch and deposition tools depend on, so its revenue tracks wafer fab capital spending more closely than the broader industrial category it sits in suggests. Its moat is in the engineering: qualification on chamber platforms is slow and sticky, and customers rarely switch suppliers once a power source is designed into a tool. The near-term driver is the AI-related buildout of advanced logic and memory capacity, which is pulling forward demand for the power and thermal subsystems AEIS ships into that equipment. Revenue growth of 30.0% is running well ahead of what most of the group is delivering, with a 40.0% gross margin and a 17.0% operating margin showing the mix is holding up. On a trailing P/E of 46.7 the stock looks expensive, but the forward P/E of 19.7 suggests earnings are expected to grow into the multiple, so the question for the deeper work is how durable that step-up is once semiconductor capex normalises.