MKS Instruments (MKSI) Stock Chart & Stock Price History $83.82 -1.07 (-1.26%) Closing price 04:00 PM EasternExtended Trading$81.78 -2.04 (-2.44%) As of 04:53 PM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more. Add Compare Share Share Chart Stock AnalysisAnalyst ForecastsChartCompetitorsDividendEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock MKS Instruments Stock Price Performance The MKS Instruments (MKSI) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has decreased 34.79%, with a year-to-date return of -19.70%. In the past month, the stock has increased 23.43%, reflecting recent market activity. As of the latest close, MKS Instruments traded at $84.89 with a market cap of $5.73 billion and volume of 724,639 shares. Five years ago, the stock traded at $99.54, representing a 15.79% decrease over that period. At the time, it had a market cap of $5.62 billion and a volume of 147,698 shares. Receive MKSI Stock News and Ratings via EmailSign-up to receive the latest news and ratings for MKS Instruments and its competitors with MarketBeat's FREE daily newsletter. Email Address 5 Day Performance-7.54%1 Month Performance+23.43%3 Month Performance-18.69%Year-To-Date Performance-19.70%1 Year Performance-34.79%5 Year Performance-15.79% MKSI Stock Chart for Friday, May, 23, 2025 MKSI Chart by TradingView MKS Instruments Stock Price History Daily Weekly Monthly Yearly Time Frame Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 3 Year 5 Year Time Frame * Start Date * End Date Export to Excel DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization05/22/2025$85.16$84.89-0.32%$86.64$84.13724,639 shs$5.73 billion05/21/2025$89.56$85.16-4.91%$88.88$84.281.05 million shs$5.74 billion05/20/2025$88.46$89.56+1.24%$89.62$87.73714,343 shs$6.04 billion05/19/2025$90.66$88.46-2.43%$88.81$87.26735,049 shs$5.97 billion05/16/2025$91.19$90.66-0.58%$91.24$89.23655,747 shs$6.11 billion05/15/2025$93.94$91.19-2.93%$93.32$90.241.13 million shs$6.15 billion05/14/2025$93.32$93.94+0.66%$94.53$91.95933,629 shs$6.34 billion05/13/2025$90.75$93.32+2.83%$93.77$90.611.30 million shs$6.29 billion05/12/2025$80.14$90.75+13.24%$91.00$86.862.50 million shs$6.12 billion05/09/2025$77.29$80.14+3.69%$80.70$78.621.58 million shs$5.41 billion Get the Latest News and Ratings for MKSI and Related StocksEnter your email address below to receive the latest news and analysts' ratings for MKS Instruments and its competitors with MarketBeat's FREE daily newsletter. 05/08/2025$74.55$77.29+3.67%$79.84$73.212.06 million shs$5.21 billion05/07/2025$72.73$74.55+2.51%$74.64$71.491.91 million shs$5.03 billion05/06/2025$74.47$72.73-2.34%$73.90$71.891.04 million shs$5.02 billion05/05/2025$75.83$74.47-1.79%$75.97$74.15953,683 shs$5.02 billion05/02/2025$71.63$75.83+5.86%$77.31$73.511.47 million shs$5.11 billion05/01/2025$70.14$71.63+2.12%$73.80$70.511.29 million shs$4.83 billion04/30/2025$71.44$70.14-1.82%$70.41$67.871.73 million shs$4.73 billion04/29/2025$73.98$71.44-3.43%$73.46$71.351.46 million shs$4.82 billion04/28/2025$74.08$73.98-0.13%$74.68$71.801.05 million shs$4.99 billion04/25/2025$74.13$74.08-0.07%$75.49$72.80933,661 shs$5.00 billion04/24/2025$67.91$74.13+9.16%$74.46$69.151.61 million shs$5.00 billion04/23/2025$62.86$67.91+8.03%$71.39$67.351.80 million shs$4.58 billion04/22/2025$60.33$62.86+4.19%$63.20$61.002.42 million shs$4.24 billion Related Companies ENTG Stock Price Chart ONTO Stock Price Chart AMKR Stock Price Chart AEIS Stock Price Chart FORM Stock Price Chart ACLS Stock Price Chart PLAB Stock Price Chart VECO Stock Price Chart UCTT Stock Price Chart COHU Stock Price Chart Receive MKSI Stock News and Ratings via EmailSign-up to receive the latest news and ratings for MKS Instruments and its competitors with MarketBeat's FREE daily newsletter. 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