Lee John Tseng-chung Files MKS Instruments (MKSI) Form 4 - October 31, 2025

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About MKS Instruments Inc.

MKS Instruments Inc. designs and manufactures instruments, subsystems, and process control solutions for advanced manufacturing processes. The company's primary function is to provide essential technologies for manufacturers of semiconductors, industrial technologies, life and health sciences, and other advanced products. MKS Instruments focuses on critical areas like vacuum and gas technologies, photonics, and laser solutions, enabling precise measurement, control, and analysis crucial for product quality and efficiency. MKS Instruments plays a vital role in the semiconductor industry by offering products that ensure the precision and accuracy required for advanced fabrication processes. The company's innovative technologies are also significant in areas such as aerospace, defense, and research sectors, where precision and reliability are paramount. With a legacy dating back to 1961, MKS Instruments has cemented its position in the financial markets as a trusted provider of advanced technology solutions. Its contributions are pivotal in supporting the development of next-generation technologies, making it a key player in driving technological advancement and efficiency across multiple industries.