MKS Instruments reported strong second quarter 2026 results with revenue of $1.248 billion, up 28% year-over-year. Non-GAAP diluted EPS reached $3.30, an 86% increase from $1.77 in Q2 2025, beating the consensus estimate of around $2.95-$2.96. Despite these performances, shares fell nearly 5% after hours as investors expressed concern over third quarter gross margin guidance of 47.0% versus 47.6% in Q2. CEO John T.C. Lee cited AI-driven investments as the primary engine behind growing order volumes in semiconductors and advanced packaging.
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