Masimo (MASI) Stock Chart & Stock Price History $168.03 -3.85 (-2.24%) Closing price 04:00 PM EasternExtended Trading$168.00 -0.03 (-0.02%) As of 04:31 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 ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Masimo Stock Price Performance The Masimo (MASI) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 32.14%, with a year-to-date return of 1.65%. In the past month, the stock has increased 6.90%, reflecting recent market activity. As of the latest close, Masimo traded at $171.88 with a market cap of $9.32 billion and volume of 787,546 shares. Five years ago, the stock traded at $225.69, representing a 25.55% decrease over that period. At the time, it had a market cap of $11.97 billion and a volume of 633,497 shares. Receive MASI Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Masimo and its competitors with MarketBeat's FREE daily newsletter. Email Address 5 Day Performance+2.01%1 Month Performance+6.90%3 Month Performance+1.56%Year-To-Date Performance+1.65%1 Year Performance+32.14%5 Year Performance-25.55% MASI Stock Chart for Tuesday, June, 10, 2025 MASI Chart by TradingView Masimo 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 Capitalization06/09/2025$171.97$171.88-0.05%$173.40$169.54787,546 shs$9.32 billion06/06/2025$164.72$171.97+4.40%$173.37$165.60910,113 shs$9.32 billion06/05/2025$162.96$164.72+1.08%$165.44$161.86825,259 shs$8.93 billion06/04/2025$163.83$162.96-0.53%$164.37$160.23439,871 shs$8.84 billion06/03/2025$165.03$163.83-0.73%$167.45$163.69531,719 shs$8.88 billion06/02/2025$161.36$165.03+2.27%$165.15$159.76881,295 shs$8.95 billion05/30/2025$156.97$161.36+2.80%$163.08$154.381.09 million shs$8.75 billion05/29/2025$155.01$156.97+1.26%$157.21$152.41728,606 shs$8.51 billion05/28/2025$157.25$155.01-1.42%$157.06$154.98569,387 shs$8.40 billion05/27/2025$150.13$157.25+4.74%$157.82$150.78690,633 shs$8.53 billion Get the Latest News and Ratings for MASI and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Masimo and its competitors with MarketBeat's FREE daily newsletter. 05/26/2025$150.13$150.13$150.88$146.98311,070 shs$8.14 billion05/23/2025$149.91$150.13+0.15%$150.88$146.98311,070 shs$8.14 billion05/22/2025$149.39$149.91+0.35%$151.00$147.66506,566 shs$8.13 billion05/21/2025$156.17$149.39-4.34%$155.60$148.59811,181 shs$8.10 billion05/20/2025$155.13$156.17+0.67%$156.41$153.67524,522 shs$8.47 billion05/19/2025$155.62$155.13-0.31%$155.20$152.84447,229 shs$8.41 billion05/16/2025$154.39$155.62+0.80%$156.14$152.97537,620 shs$8.44 billion05/15/2025$153.15$154.39+0.81%$155.17$151.39745,264 shs$8.37 billion05/14/2025$161.56$153.15-5.21%$161.33$151.131.05 million shs$8.30 billion05/13/2025$163.56$161.56-1.22%$165.27$161.37536,884 shs$8.76 billion05/12/2025$157.18$163.56+4.06%$165.28$161.72614,506 shs$8.87 billion05/09/2025$153.77$157.18+2.22%$159.18$154.461.59 million shs$8.49 billion Related Companies ResMed Stock Price Chart DexCom Stock Price Chart STERIS Stock Price Chart Insulet Stock Price Chart Baxter International Stock Price Chart Hologic Stock Price Chart Globus Medical Stock Price Chart Teleflex Stock Price Chart Integer Stock Price Chart Alphatec Stock Price Chart Receive MASI Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Masimo and its competitors with MarketBeat's FREE daily newsletter. 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