MKS Instruments, Inc. Q3 2026 Earnings Recap

The stock fell 9.3% despite Q3 revenue and EPS coming in above the high end of guidance. The transcript points to a likely concern that the results and outlook were not enough to offset high expectations: management offered upbeat demand commentary, but the provided remarks contain no consolidated Q4 revenue or EPS outlook to quantify the “very strong finish” it described.

Key Takeaways

• Semiconductor revenue rose 15% sequentially and 54% year over year, at the high end of guidance; management said Q4 points to accelerating year-over-year growth.
• Electronics and Packaging revenue increased 9% sequentially and 43% year over year, well above guidance, with chemistry revenue up 26% year over year excluding FX and palladium pass-through.
• Chemistry equipment sales grew more than 75% year over year in Q3; MKS expects more than $300 million for the full year, and current capacity is sold out through 2027.
• Management said AI-related demand is expanding: AI is expected to represent about 25% of full-year E&P revenue and roughly one-third at the midpoint of Q4 guidance.
• Operating margins expanded by approximately 700 basis points year over year, while management plans capacity expansion and said it aims to keep capex intensity within its 3%–5% target.