MKS Instruments Q3 2026: Record Revenue and a Bold Q4 Outlook

MKS Instruments posted adjusted non-GAAP EPS of $4.18 for Q3 2026, beating the consensus estimate of $3.63. Revenue of $1.41 billion rose 43% year over year, with management describing the results as records across revenue, GAAP net income, adjusted EBITDA, and non-GAAP EPS.

Semiconductors drove the quarter, with revenue reaching $638 million, up 54% from $415 million a year earlier. AI-driven demand for chip stacking, scaling, and advanced packaging is generating robust orders and new design wins, and CEO John T.C. Lee said those fundamentals are becoming more integral to the AI era rather than less. Electronics and Packaging revenue also grew 43% year over year, meaning every end market came in at or above the high end of management's own guidance.

Profitability improved alongside the top line. Gross margin widened to 47.7% from 46.6%, and free cash flow more than doubled to $243 million from $147 million a year ago. That cash generation underpins a new board-approved share repurchase program of up to $500 million, replacing an older program that had roughly $28 million remaining.

The forward guidance is what draws the most attention. MKS guided Q4 2026 revenue to $1.49 billion and non-GAAP EPS to $5.00, a step up from the $4.18 just reported. That trajectory means the company is pointing to sequential acceleration even after a record quarter, which is an unusually confident signal heading into year-end.

A few risks are worth keeping in mind. The company carries $1.4 billion of convertible notes that are now convertible and classified as short-term debt, and its guidance reflects current U.S. import tariffs and retaliatory trade actions rather than a benign trade environment. MKS also has a pending sale of its Ophir Optics business that is excluded from the Q4 guidance, adding another variable to watch as the quarter unfolds.