Investor Relations

MKS Instruments is a global provider of instruments, subsystems, and process control solutions that measure, control, power, monitor, and analyze critical parameters of advanced manufacturing processes to improve process performance and productivity.  Our products are derived from our core competencies in pressure measurement and control, materials delivery, gas composition analysis, control and information technology, power and reactive gas generation, vacuum technology, photonics, lasers, optics and motion control. 

Our primary served markets include semiconductor capital equipment, industrial manufacturing, environmental, medical, life sciences and scientific research. 

Please direct questions concerning transfer of shares, lost certificates or related inquiries to:

American Stock Transfer & Trust Company
59 Maiden Lane
New York, New York 10038
Phone: 800-937-5449 (weekdays from 9:00 am to 5:00 pm Eastern time)
Fax: 718-236-2641
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