Masimo (MASI) Institutional Ownership $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 Ownership Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Institutional Ownership Changes (13F Filings) for Masimo (NASDAQ:MASI)CurrentInstitutional OwnershipPercentage85.96%Number ofInstitutional Buyers(last 12 months)231TotalInstitutional Inflows(last 12 months)$2.22BNumber ofInstitutional Sellers(last 12 months)147TotalInstitutional Outflows(last 12 months)$1.36B Get MASI Insider Trade Alerts Want to know when executives and insiders are buying or selling Masimo stock? 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Email Address Skip Chart & View Institutional Buying and Selling Data MASI Institutional Buying and Selling by Quarter Masimo Major Shareholders & Ownership History Export to ExcelReporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails5/28/2025 Anderson Financial Strategies LLC295$49K0.0%N/A0.001% 5/28/2025 Strs Ohio40,135$6.69M0.0%N/A0.074% 5/20/2025 Intech Investment Management LLC32,494$5.41M0.1%+26.8%0.060% 5/19/2025 Jane Street Group LLC2,050$342K0.0%-94.8%0.004% 5/19/2025 UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC189,130$31.51M0.0%-0.6%0.349% 5/16/2025 Woodline Partners LP132,969$22.15M0.1%+159.8%0.245% 5/16/2025 Empowered Funds LLC2,864$477K0.0%-26.4%0.005% 5/16/2025 Logan Capital Management Inc.42,395$7.06M0.3%-11.3%0.078% 5/16/2025 United Services Automobile Association2,912$476K0.0%N/A0.005% 5/16/2025 Great Lakes Advisors LLC92,872$15.47M0.1%-3.0%0.171% 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. 5/16/2025 Fred Alger Management LLC8,772$1.46M0.0%-57.1%0.016% 5/16/2025 Goldman Sachs Group Inc.280,255$46.69M0.0%+38.6%0.517% 5/16/2025 Jones Financial Companies Lllp2,201$367K0.0%+1,267.1%0.004% 5/16/2025 Dynamic Technology Lab Private Ltd1,320$220K0.0%N/A0.002% 5/16/2025 PharVision Advisers LLC1,410$235K0.3%N/A0.003% 5/16/2025 MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.11,371$1.89M0.0%+0.6%0.021% 5/16/2025 Gotham Asset Management LLC144,590$24.09M0.2%+13.2%0.267% 5/16/2025 Bridger Management LLC39,300$6.55M3.3%N/A0.072% 5/16/2025 Alliancebernstein L.P.865,870$144.25M0.1%-8.6%1.597% 5/16/2025 AQR Capital Management LLC8,142$1.31M0.0%+136.5%0.015% 5/16/2025 Advisors Asset Management Inc.27,288$4.55M0.1%+18.8%0.050% 5/16/2025 Amundi41,167$6.27M0.0%-63.1%0.076% 5/16/2025 Alyeska Investment Group L.P.722,534$120.37M0.5%+24.9%1.333% 5/16/2025 4D Advisors LLC30,000$5.00M3.9%N/A0.055% 5/15/2025 Redmile Group LLC26,062$4.34M0.4%N/A0.048% 5/15/2025 Birchview Capital LP11,280$1.88M1.6%-26.2%0.021% 5/15/2025 Durable Capital Partners LP1,125,619$187.53M1.7%N/A2.076% 5/15/2025 Royal Bank of Canada43,884$7.31M0.0%+44.5%0.081% 5/15/2025 Alamea Verwaltungs GmbH1,963$327K0.3%N/A0.004% 5/15/2025 Quarry LP449$75K0.0%+253.5%0.001% 5/15/2025 Twin Tree Management LP175$29K0.0%N/A0.000% 5/15/2025 Baird Financial Group Inc.45,120$7.52M0.0%+31.9%0.083% 5/15/2025 Vident Advisory LLC2,798$466K0.0%N/A0.005% 5/15/2025 Canada Pension Plan Investment Board15,800$2.63M0.0%-1.9%0.029% 5/15/2025 Tema Etfs LLC4,543$757K0.2%-52.6%0.008% 5/15/2025 Landscape Capital Management L.L.C.4,998$833K0.1%-10.5%0.009% 5/14/2025 Cramer Rosenthal Mcglynn LLC151,664$25.27M1.8%-31.9%0.280% 5/14/2025 Corebridge Financial Inc.49,327$8.22M0.0%-2.4%0.091% 5/14/2025 Comerica Bank137,855$22.97M0.1%-2.5%0.254% 5/14/2025 MetLife Investment Management LLC25,640$4.27M0.0%-1.5%0.047% The Robotics Revolution has arrived … and one $7 stock could take off as a result. (Ad)Something big is brewing in Washington. According to my research, an executive order from President Trump could be just weeks away. And it holds the potential to trigger one of the most explosive tech booms in US history. At the center of it all? Robots. Not the kind that clean your house or pour you coffee. But the kind that could reshape entire industries, add $1.2 trillion per year to the US economy, and affect 65 million American lives — just in the next year.This little-known company holds nearly 100 patents and trades for around $75/14/2025 Quantitative Investment Management LLC4,462$743K0.1%-9.7%0.008% 5/14/2025 Price T Rowe Associates Inc. MD282,637$47.09M0.0%+12.7%0.521% 5/14/2025 T. Rowe Price Investment Management Inc.1,673,252$278.76M0.2%+0.7%3.086% 5/14/2025 Erste Asset Management GmbH92,000$15.33M0.2%+11.3%0.170% 5/14/2025 EntryPoint Capital LLC5,368$894K0.4%N/A0.010% 5/14/2025 Wellington Management Group LLP1,297$216K0.0%N/A0.002% 5/13/2025 Northern Trust Corp383,356$63.87M0.0%-0.1%0.707% 5/13/2025 Versor Investments LP6,978$1.16M0.2%N/A0.013% 5/13/2025 Algert Global LLC7,310$1.22M0.0%N/A0.013% 5/13/2025 Corient IA LLC1,500$250K0.2%N/A0.003% 5/13/2025 Northwest & Ethical Investments L.P.2,100$349K0.0%+200.0%0.004% 5/13/2025 Raymond James Financial Inc.206,116$34.34M0.0%+1.1%0.380% 5/13/2025 State of New Jersey Common Pension Fund D15,867$2.64M0.0%-5.2%0.029% 5/13/2025 American Century Companies Inc.79,176$13.19M0.0%+525.5%0.146% 5/13/2025 Liontrust Investment Partners LLP747,498$124.53M1.9%-5.7%1.379% 5/13/2025 Dimensional Fund Advisors LP703,378$117.17M0.0%+8.6%1.297% 5/13/2025 Vestmark Advisory Solutions Inc.3,274$545K0.0%+6.1%0.006% 5/13/2025 Mitsubishi UFJ Asset Management UK Ltd.8,000$1.33M0.7%N/A0.015% 5/13/2025 Neuberger Berman Group LLC74,962$12.49M0.0%-45.7%0.138% 5/13/2025 Montanaro Asset Management Ltd32,300$5.38M1.6%-30.5%0.060% 5/13/2025 Russell Investments Group Ltd.34,747$5.79M0.0%+76.4%0.064% 5/13/2025 Informed Momentum Co LLC22,952$3.82M0.7%N/A0.042% 5/13/2025 HighTower Advisors LLC4,550$758K0.0%-33.2%0.008% 5/12/2025 Nuveen LLC155,045$25.83M0.0%N/A0.286% 5/12/2025 Aigen Investment Management LP1,627$271K0.0%N/A0.003% 5/12/2025 Entropy Technologies LP1,803$300K0.0%N/A0.003% 5/12/2025 Invesco Ltd.261,358$43.54M0.0%-6.0%0.482% 5/12/2025 Townsquare Capital LLC9,870$1.64M0.0%+21.5%0.018% 5/12/2025 NS Partners Ltd43,555$7.26M0.3%+2.1%0.080% 5/12/2025 Citigroup Inc.52,158$8.69M0.0%-43.1%0.096% 5/12/2025 Swiss National Bank88,200$14.69M0.0%-1.3%0.163% 5/12/2025 Mitsubishi UFJ Asset Management Co. Ltd.4,039$673K0.0%+2.9%0.007% 5/12/2025 Maryland State Retirement & Pension System2,028$338K0.0%-17.1%0.004% 5/9/2025 Deutsche Bank AG6,309$1.05M0.0%+1.5%0.012% 5/9/2025 Charles Schwab Investment Management Inc.377,070$62.82M0.0%-0.2%0.698% 5/9/2025 Vanguard Group Inc.4,583,276$763.57M0.0%-0.1%8.482% 5/9/2025 New Age Alpha Advisors LLC2,270$378K0.0%-42.8%0.004% 5/9/2025 Westfield Capital Management Co. LP671,479$111.87M0.5%-12.7%1.243% 5/9/2025 Bank of Nova Scotia93,203$15.53M0.0%N/A0.172% 5/9/2025 Malaga Cove Capital LLC2,906$484K0.2%-2.6%0.005% 5/9/2025 PNC Financial Services Group Inc.5,684$947K0.0%+21.3%0.011% 5/8/2025 Commerce Bank5,024$837K0.0%+2.5%0.009% 5/8/2025 Wealthquest Corp2,112$352K0.0%N/A0.004% 5/8/2025 North Star Asset Management Inc.1,910$318K0.0%-25.5%0.004% 5/8/2025 Vestcor Inc3,825$637K0.0%N/A0.007% 5/8/2025 Federated Hermes Inc.51,002$8.50M0.0%-3.3%0.094% 5/7/2025 Picton Mahoney Asset Management44,152$7.36M0.1%+3.6%0.082% 5/7/2025 TD Asset Management Inc88,668$14.77M0.0%+4.8%0.164% 5/7/2025 DE Burlo Group Inc.8,402$1.40M0.2%-1.8%0.016% 5/6/2025 Neo Ivy Capital Management10,248$1.71M0.5%N/A0.019% The Robotics Revolution has arrived … and one $7 stock could take off as a result. (Ad)The robotics revolution is here. And it's set to impact everything from how we manufacture goods to how we drive, deliver packages, and even perform surgeries. According to Forbes, this could unlock a massive $24 trillion opportunity for investors. And I've zeroed in on 6 robotics stocks at the center of it all.Here's how to get access to all 4 reports now5/6/2025 Assetmark Inc.1,466$244K0.0%+25.7%0.003% 5/6/2025 Cetera Investment Advisers1,600$267K0.0%-13.3%0.003% 5/6/2025 Legato Capital Management LLC5,245$874K0.1%N/A0.010% 5/6/2025 KLP Kapitalforvaltning AS8,900$1.48M0.0%-5.3%0.016% 5/6/2025 Universal Beteiligungs und Servicegesellschaft mbH6,405$1.07M0.0%N/A0.012% 5/6/2025 Choreo LLC1,433$239K0.0%N/A0.003% 5/5/2025 South Dakota Investment Council24,768$4.13M0.1%-19.1%0.046% 5/5/2025 Kestra Private Wealth Services LLC2,892$482K0.0%N/A0.005% 5/2/2025 Victory Capital Management Inc.26,367$4.39M0.0%+192.8%0.049% 5/2/2025 Massachusetts Financial Services Co. MA1,967,838$327.84M0.1%+13.4%3.642% (Data available from 1/1/2016 forward) MASI Institutional Ownership - Frequently Asked Questions Who are the largest shareholders of MASI shares? During the previous two years, 426 institutional investors and hedge funds held shares of Masimo. The most heavily invested institutionals were FMR LLC ($1.34B), BlackRock Inc. ($1.01B), Politan Capital Management LP ($775.61M), Vanguard Group Inc. ($763.57M), Capital Research Global Investors ($405.81M), Massachusetts Financial Services Co. MA ($327.84M), and T. Rowe Price Investment Management Inc. ($278.76M).Learn more on MASI's institutional investors. What percentage of Masimo stock is owned by institutional investors? 85.96% of Masimo stock is owned by institutional investors. Learn more on MASI's institutional investor holdings. Which institutional investors have been buying Masimo stock? Of the 331 institutional investors that purchased Masimo stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: FMR LLC ($3.31M), Massachusetts Financial Services Co. MA ($2.85M), Capital Research Global Investors ($1.23M), Durable Capital Partners LP ($1.13M), Eminence Capital LP ($1.04M), Alliancebernstein L.P. ($878.59K), and Westfield Capital Management Co. LP ($477.17K). How much institutional buying is happening at Masimo? Institutional investors have bought a total of 20,597,622 shares in the last 24 months. This purchase volume represents approximately $2.91B in transactions. Which Masimo major shareholders have been selling company stock? Of the 231 institutional investors that sold Masimo stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: FMR LLC ($1.91M), Farallon Capital Management LLC ($1.23M), Thrivent Financial for Lutherans ($1.21M), Ace Management Global Ltd. ($1.01M), Massachusetts Financial Services Co. MA ($1.00M), RTW Investments LP ($818.20K), and Westfield Capital Management Co. LP ($579.87K). How much institutional selling is happening at Masimo? Institutional investors have sold a total of 15,695,494 shares in the last 24 months. This volume of shares sold represents approximately $2.13B in transactions. Related Companies ResMed Major Shareholders DexCom Major Shareholders STERIS Major Shareholders Insulet Major Shareholders Baxter International Major Shareholders Hologic Major Shareholders Globus Medical Major Shareholders Teleflex Major Shareholders Integer Major Shareholders Alphatec Major Shareholders This page (NASDAQ:MASI) was last updated on 6/10/2025 by MarketBeat.com Staff From Our PartnersThe Trump Dump is starting; Get out of stocks now?The first 365 days of the Trump presidency… Will be the best time to get rich in American history.Paradigm Press | SponsoredBanks aren’t ready for this altcoin—are you?While everyone's distracted by Bitcoin's moves, a stealth revolution is underway. 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