Masimo (MASI) Stock Chart & Stock Price History $146.15 -1.97 (-1.33%) As of 02:13 PM Eastern This is a fair market value 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 26.97%, with a year-to-date return of -11.67%. In the past month, the stock has increased 0.88%, reflecting recent market activity. As of the latest close, Masimo traded at $148.12 with a market cap of $8.05 billion and volume of 357,227 shares. Five years ago, the stock traded at $215.15, representing a 32.14% decrease over that period. At the time, it had a market cap of $11.82 billion and a volume of 343,047 shares. 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Read our full terms of service and privacy policy. 5 Day Performance-0.81%1 Month Performance+0.88%3 Month Performance-13.11%Year-To-Date Performance-11.67%1 Year Performance+26.97%5 Year Performance-32.14% MASI Stock Chart for Wednesday, September, 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 Capitalization09/09/2025$148.79$148.12-0.45%$149.46$147.17357,227 shs$8.05 billion09/08/2025$147.19$148.79+1.09%$149.95$145.92740,286 shs$8.08 billion09/05/2025$143.01$147.19+2.92%$148.08$142.07693,981 shs$8.00 billion09/04/2025$136.77$143.01+4.56%$143.34$136.35709,748 shs$7.77 billion09/03/2025$137.74$136.77-0.70%$138.50$135.73536,772 shs$7.43 billion09/02/2025$139.71$137.74-1.41%$138.20$135.34681,882 shs$7.48 billion09/01/2025$139.71$139.71$141.93$138.77459,927 shs$7.59 billion08/29/2025$140.95$139.71-0.88%$141.93$138.77459,927 shs$7.59 billion08/28/2025$142.49$140.95-1.08%$142.75$139.44668,122 shs$7.66 billion08/27/2025$143.25$142.49-0.53%$144.08$141.17777,553 shs$7.74 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. 08/26/2025$145.15$143.25-1.31%$145.79$142.86575,690 shs$7.78 billion08/25/2025$148.63$145.15-2.34%$147.67$144.66467,394 shs$7.89 billion08/22/2025$144.24$148.63+3.04%$149.59$144.29429,976 shs$8.08 billion08/21/2025$145.65$144.24-0.97%$146.16$143.11721,423 shs$7.84 billion08/20/2025$146.76$145.65-0.76%$147.11$144.02667,784 shs$7.91 billion08/19/2025$153.93$146.76-4.66%$154.70$146.491.02 million shs$7.97 billion08/18/2025$153.87$153.93+0.04%$155.88$153.45528,907 shs$8.36 billion08/15/2025$151.87$153.87+1.32%$158.30$152.92440,965 shs$8.36 billion08/14/2025$155.96$151.87-2.62%$152.02$147.21970,159 shs$8.25 billion08/13/2025$150.13$155.96+3.88%$156.71$151.71904,099 shs$8.47 billion08/12/2025$147.37$150.13+1.87%$151.54$147.47652,678 shs$8.16 billion08/11/2025$144.73$147.37+1.82%$149.66$144.27871,180 shs$8.01 billion Related Companies AMN Healthcare Services Stock Price Chart Veeva Systems Stock Price Chart DexCom Stock Price Chart STERIS Stock Price Chart Insulet Stock Price Chart Hologic Stock Price Chart Baxter International Stock Price Chart Globus Medical Stock Price Chart Teleflex Stock Price Chart Integer 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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