MKS Instruments Shares Slide Despite Earnings Beat and Strong Q1 Outlook

Core Insights - MKS Instruments Inc. reported fourth-quarter results that exceeded analyst expectations, but shares declined over 10% in after-hours trading [1] - The company posted adjusted earnings of $2.47 per share, surpassing the consensus estimate of $2.30, and revenue reached $1.03 billion, beating expectations of $995.32 million, marking a 10.5% year-over-year increase [1] Segment Performance - The Semiconductor segment led performance with revenue of $435 million, reflecting an 8.8% year-over-year increase [2] - Electronics & Packaging revenue rose 19.3% to $303 million, while Specialty Industrial revenue increased by 5% to $295 million [2] Future Guidance - For the first quarter of 2026, MKS guided revenue of $1.04 billion, plus or minus $40 million, above the consensus estimate of $1.01 billion [2] - The company forecast adjusted earnings of $2.00 per share, plus or minus $0.28, exceeding expectations of $1.87 per share [2]