ANDOVER, Mass., July 27, 2011 /PRNewswire/ -- MKS Instruments, Inc. (NASDAQ: MKSI), a global provider of technologies that enable advanced processes and improve productivity, announced today that its Board of Directors has approved a stock repurchase program of up to $200 million. "Over the past few years, we have demonstrated our ability to manage the business for operating leverage and positive cash flow," said Leo Berlinghieri, Chief Executive Officer and President. "Since the beginning of 2010, we have added $237 million to cash and investments, net of debt, primarily through positive cash flow from operations. During the 2009 downturn, which was the most severe on record, we managed the business to be cash neutral for the year. This program reaffirms our confidence in the long-term strength of the company and our commitment to provide meaningful cash returns to shareholders, in the form of cash dividends as well as share repurchases." Effective immediately, this program allows for the company to repurchase up to an aggregate of $200 million of shares of its common stock from time to time in open market purchases, privately negotiated transactions or through other appropriate means. The timing and quantity of any shares repurchased will depend upon a variety of factors, including business conditions, stock market conditions and business development activities, including, but not limited to, merger and acquisition opportunities. These repurchases may be commenced, suspended or discontinued at any time without prior notice. About MKS Instruments MKS Instruments, Inc. 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, and vacuum technology. Our primary served markets are manufacturers of capital equipment for semiconductor devices, and for other thin film applications including flat panel displays, solar cells, light emitting diodes, data storage media, and other advanced coatings. We also leverage our technology in other markets with advanced manufacturing applications including medical equipment, pharmaceutical manufacturing, energy generation, and environmental monitoring.