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MASI Insider Trading

Insider Ownership Percentage: 9.70%
Insider Buying (Last 12 Months): $452,975.00
Insider Selling (Last 12 Months): $1,632,800.00

Masimo Insider Trading History Chart

This chart shows the insider buying and selling history at Masimo by year and by quarter.

Skip ChartChart Data in Insider Trading History Table

Masimo Share Price & Price History

Current Price: $178.24
Price Change: ▼ Price Decrease of -0.46 (-0.26%)
As of 03/20/2026 05:00 PM ET

This chart shows the closing price history over time for MASI up to the past year.

Skip Chart and Table DataPrice Data in Insider Trading History Table
Days: 30 | 90 | 365

Masimo Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
8/12/2025Michelle BrennanChairmanBuy100$150.35$15,035.007,218View SEC Filing Icon  
8/11/2025William R JellisonDirectorBuy3,000$145.98$437,940.004,790View SEC Filing Icon  
5/12/2025Bilal MuhsinCOOSell10,000$163.28$1,632,800.0024,172View SEC Filing Icon  
3/14/2025Craig B. ReynoldsDirectorSell2,053$166.13$341,064.8916,581View SEC Filing Icon  
3/10/2025Bilal MuhsinCOOSell30,000$167.49$5,024,700.0024,172View SEC Filing Icon  
4/26/2024Craig B. ReynoldsDirectorSell40,000$136.17$5,446,800.007,406View SEC Filing Icon  
5/25/2023Joe E KianiCEOBuy6,365$157.16$1,000,323.40366,055View SEC Filing Icon  
See Full Table

SEC Filings (Institutional Ownership Changes) for Masimo (NASDAQ:MASI)

85.96% of Masimo stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at MASI by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

Masimo Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
3/17/2026Rockefeller Capital Management L.P.86,411$11.24M0.0%-41.4%0.161%Search for SEC Filing on Google Icon
3/9/2026Corient Private Wealth LLC340,230$44.25M0.1%+1.2%0.633%Search for SEC Filing on Google Icon
3/3/2026Caitong International Asset Management Co. Ltd890$0.12M0.0%N/A0.002%Search for SEC Filing on Google Icon
2/24/2026Pacer Advisors Inc.7,360$0.96M0.0%+21.1%0.014%Search for SEC Filing on Google Icon
2/23/2026Virtu Financial LLC1,985$0.26M0.0%N/A0.004%Search for SEC Filing on Google Icon
2/19/2026T. Rowe Price Investment Management Inc.2,330,158$303.06M0.2%+9.6%4.338%Search for SEC Filing on Google Icon
2/19/2026Invesco Ltd.319,308$41.53M0.0%-0.6%0.595%Search for SEC Filing on Google Icon
2/19/2026Corient Private Wealth LLC341,730$44.45M0.0%+1.6%0.636%Search for SEC Filing on Google Icon
2/18/2026Mercer Global Advisors Inc. ADV10,862$1.41M0.0%N/A0.020%Search for SEC Filing on Google Icon
2/18/2026Naya Capital Management UK Ltd.1,560,697$202.98M15.3%N/A2.906%Search for SEC Filing on Google Icon
2/18/2026State of Tennessee Department of Treasury13,918$1.91M0.0%-4.1%0.026%Search for SEC Filing on Google Icon
2/18/2026Empowered Funds LLC1,603$0.21M0.0%-34.9%0.003%Search for SEC Filing on Google Icon
2/18/2026XTX Topco Ltd12,746$1.66M0.0%N/A0.024%Search for SEC Filing on Google Icon
2/18/2026nVerses Capital LLC2,067$0.27M0.6%N/A0.004%Search for SEC Filing on Google Icon
2/18/2026Voloridge Investment Management LLC39,557$5.15M0.0%+1,281.7%0.074%Search for SEC Filing on Google Icon
2/18/2026Wellington Management Group LLP7,832$1.02M0.0%+257.0%0.015%Search for SEC Filing on Google Icon
2/18/2026SummitTX Capital L.P.1,603$0.21M0.0%N/A0.003%Search for SEC Filing on Google Icon
2/18/2026Tudor Investment Corp ET AL16,242$2.11M0.0%-48.7%0.030%Search for SEC Filing on Google Icon
2/18/2026Polymer Capital Management US LLC9,523$1.24M0.1%+62.1%0.018%Search for SEC Filing on Google Icon
2/18/2026Occudo Quantitative Strategies LP9,663$1.26M0.1%+87.7%0.018%Search for SEC Filing on Google Icon
2/18/2026Millennium Management LLC187,965$24.45M0.0%+1,065.2%0.350%Search for SEC Filing on Google Icon
2/18/2026Man Group plc147,416$19.17M0.0%N/A0.274%Search for SEC Filing on Google Icon
2/18/2026Gotham Asset Management LLC342,194$44.51M0.2%+165.2%0.637%Search for SEC Filing on Google Icon
2/18/2026Engineers Gate Manager LP83,458$10.86M0.1%+171.2%0.155%Search for SEC Filing on Google Icon
2/18/2026Cinctive Capital Management LP5,681$0.74M0.0%N/A0.011%Search for SEC Filing on Google Icon
2/18/2026Bamco Inc. NY373,899$48.63M0.1%-3.8%0.696%Search for SEC Filing on Google Icon
2/17/2026Viking Global Investors LP514,340$66.90M0.2%-52.1%0.958%Search for SEC Filing on Google Icon
2/17/2026Schonfeld Strategic Advisors LLC265,036$34.47M0.2%+2,335.1%0.493%Search for SEC Filing on Google Icon
2/17/2026AQR Capital Management LLC1,091,326$141.94M0.1%+3,416.5%2.032%Search for SEC Filing on Google Icon
2/17/2026DF Dent & Co. Inc.142,626$18.55M0.3%+31.3%0.266%Search for SEC Filing on Google Icon
2/17/2026Laird Norton Wetherby Trust Company LLC4,778$0.62M0.0%N/A0.009%Search for SEC Filing on Google Icon
2/17/2026Trexquant Investment LP13,920$1.81M0.0%N/A0.026%Search for SEC Filing on Google Icon
2/17/2026Amundi43,860$5.70M0.0%-48.3%0.082%Search for SEC Filing on Google Icon
2/17/2026iSAM Funds UK Ltd1,762$0.23M0.1%+152.1%0.003%Search for SEC Filing on Google Icon
2/17/2026Jump Financial LLC12,953$1.69M0.0%N/A0.024%Search for SEC Filing on Google Icon
2/17/2026Price T Rowe Associates Inc. MD213,594$27.78M0.0%-58.5%0.398%Search for SEC Filing on Google Icon
2/17/2026T. Rowe Price Investment Management Inc.600,293$78.08M0.1%-71.8%1.118%Search for SEC Filing on Google Icon
2/17/2026Public Employees Retirement System of Ohio13,879$1.81M0.0%-3.6%0.026%Search for SEC Filing on Google Icon
2/17/2026California State Teachers Retirement System43,823$5.70M0.0%+1.1%0.082%Search for SEC Filing on Google Icon
2/17/2026Russell Investments Group Ltd.4,633$0.60M0.0%-5.2%0.009%Search for SEC Filing on Google Icon
2/17/2026State of Wisconsin Investment Board19,490$2.54M0.0%-10.3%0.036%Search for SEC Filing on Google Icon
2/17/2026Captrust Financial Advisors3,852$0.50M0.0%N/A0.007%Search for SEC Filing on Google Icon
2/17/2026ExodusPoint Capital Management LP9,385$1.22M0.0%N/A0.017%Search for SEC Filing on Google Icon
2/17/2026Royal Bank of Canada11,340$1.47M0.0%-91.1%0.021%Search for SEC Filing on Google Icon
2/17/2026Graham Capital Management L.P.6,017$0.78M0.0%+4.3%0.011%Search for SEC Filing on Google Icon
2/17/2026Magnetar Financial LLC5,455$0.71M0.0%N/A0.010%Search for SEC Filing on Google Icon
2/17/2026Rothschild Wealth LLC1,747$0.23M0.0%N/A0.003%Search for SEC Filing on Google Icon
2/17/2026Aster Capital Management DIFC Ltd216$28K0.0%N/A0.000%Search for SEC Filing on Google Icon
2/16/2026Sofinnova Investments Inc.46,201$6.01M0.2%N/A0.086%Search for SEC Filing on Google Icon
2/16/2026Squarepoint Ops LLC583,747$75.92M0.1%-6.0%1.087%Search for SEC Filing on Google Icon
2/16/2026Vanguard Personalized Indexing Management LLC7,523$0.98M0.0%+10.7%0.014%Search for SEC Filing on Google Icon
2/16/2026Verition Fund Management LLC53,020$6.90M0.0%+463.9%0.099%Search for SEC Filing on Google Icon
2/16/2026Mariner LLC21,449$2.79M0.0%N/A0.040%Search for SEC Filing on Google Icon
2/16/2026DE Burlo Group Inc.7,952$1.03M0.1%-1.2%0.015%Search for SEC Filing on Google Icon
2/16/2026Barclays PLC58,358$7.59M0.0%-25.0%0.109%Search for SEC Filing on Google Icon
2/16/2026Brown Advisory Inc.14,854$1.93M0.0%-4.4%0.028%Search for SEC Filing on Google Icon
2/16/2026Aigen Investment Management LP2,018$0.26M0.1%N/A0.004%Search for SEC Filing on Google Icon
2/13/2026FORA Capital LLC5,174$0.67M0.1%+42.8%0.010%Search for SEC Filing on Google Icon
2/13/2026Marshall Wace LLP219,312$28.52M0.0%+63.5%0.408%Search for SEC Filing on Google Icon
2/13/2026The Manufacturers Life Insurance Company 33,184$4.32M0.0%-3.0%0.062%Search for SEC Filing on Google Icon
2/13/2026CANADA LIFE ASSURANCE Co26,610$3.46M0.0%-1.9%0.050%Search for SEC Filing on Google Icon
2/13/2026Alpha Wave Global LP75,552$9.83M1.2%-22.2%0.141%Search for SEC Filing on Google Icon
2/13/2026Walleye Capital LLC42,049$5.47M0.0%-52.9%0.078%Search for SEC Filing on Google Icon
2/13/2026Onex Canada Asset Management Inc.25,805$3.36M0.5%-7.6%0.048%Search for SEC Filing on Google Icon
2/13/2026Bridgewater Associates LP1,619$0.21M0.0%-5.5%0.003%Search for SEC Filing on Google Icon
2/13/2026UMB Bank n.a.465$60K0.0%+94.6%0.001%Search for SEC Filing on Google Icon
2/13/2026Stifel Financial Corp4,526$0.59M0.0%-3.7%0.008%Search for SEC Filing on Google Icon
2/13/2026Commerce Bank17,876$2.33M0.0%-5.4%0.033%Search for SEC Filing on Google Icon
2/13/2026Bank of Nova Scotia5,247$0.68M0.0%N/A0.010%Search for SEC Filing on Google Icon
2/13/2026Morgan Stanley920,735$119.75M0.0%+33.3%1.714%Search for SEC Filing on Google Icon
2/13/2026Schroder Investment Management Group475,504$62.32M0.0%+41.2%0.885%Search for SEC Filing on Google Icon
2/13/2026First Trust Advisors LP2,341$0.30M0.0%-96.2%0.004%Search for SEC Filing on Google Icon
2/13/2026Headlands Technologies LLC2,350$0.31M0.0%N/A0.004%Search for SEC Filing on Google Icon
2/13/2026Alyeska Investment Group L.P.1,259,307$163.79M0.5%-8.8%2.345%Search for SEC Filing on Google Icon
2/13/2026Charles Schwab Investment Management Inc.361,896$47.07M0.0%-0.7%0.674%Search for SEC Filing on Google Icon
2/13/2026Police & Firemen s Retirement System of New Jersey19,484$2.53M0.0%-2.6%0.036%Search for SEC Filing on Google Icon
2/13/2026State Street Corp1,415,196$184.06M0.0%-4.7%2.635%Search for SEC Filing on Google Icon
2/13/2026Vontobel Holding Ltd.1,549$0.20M0.0%N/A0.003%Search for SEC Filing on Google Icon
2/13/2026Dynamic Technology Lab Private Ltd9,480$1.23M0.3%N/A0.018%Search for SEC Filing on Google Icon
2/13/2026Caitong International Asset Management Co. Ltd290$38K0.1%N/A0.001%Search for SEC Filing on Google Icon
2/13/2026UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC118,964$15.47M0.0%+9.0%0.221%Search for SEC Filing on Google Icon
2/13/2026Wells Fargo & Company MN18,697$2.43M0.0%+8.2%0.035%Search for SEC Filing on Google Icon
2/13/2026Quadrant Capital Group LLC3,746$0.49M0.0%-23.3%0.007%Search for SEC Filing on Google Icon
2/12/2026Advisors Asset Management Inc.19,858$2.58M0.0%-17.9%0.037%Search for SEC Filing on Google Icon
2/12/2026Federation des caisses Desjardins du Quebec3,657$0.48M0.0%+18.2%0.007%Search for SEC Filing on Google Icon
2/12/2026HRT Financial LP92,776$12.07M0.0%N/A0.173%Search for SEC Filing on Google Icon
2/12/2026MetLife Investment Management LLC24,472$3.18M0.0%-5.3%0.046%Search for SEC Filing on Google Icon
2/12/2026State Board of Administration of Florida Retirement System39,749$5.17M0.0%-3.2%0.074%Search for SEC Filing on Google Icon
2/12/2026Renaissance Technologies LLC59,900$7.79M0.0%N/A0.112%Search for SEC Filing on Google Icon
2/12/2026Dimensional Fund Advisors LP173,950$22.63M0.0%-33.0%0.324%Search for SEC Filing on Google Icon
2/12/2026Federated Hermes Inc.3,672$0.48M0.0%-28.2%0.007%Search for SEC Filing on Google Icon
2/12/2026Ensign Peak Advisors Inc2,711$0.35M0.0%-90.1%0.005%Search for SEC Filing on Google Icon
2/12/2026Campbell & CO Investment Adviser LLC27,783$3.61M0.2%N/A0.052%Search for SEC Filing on Google Icon
2/12/2026Wilmington Savings Fund Society FSB8,024$1.04M0.0%-9.8%0.015%Search for SEC Filing on Google Icon
2/12/2026South Dakota Investment Council21,268$2.77M0.1%-7.8%0.040%Search for SEC Filing on Google Icon
2/12/2026Swiss National Bank91,100$11.85M0.0%+2.0%0.170%Search for SEC Filing on Google Icon
2/12/2026Logan Capital Management Inc.26,505$3.45M0.1%+5.6%0.049%Search for SEC Filing on Google Icon
2/12/2026Nuveen LLC224,068$29.14M0.0%-0.7%0.417%Search for SEC Filing on Google Icon
2/12/2026Xponance LLC8,738$1.14M0.0%-7.3%0.016%Search for SEC Filing on Google Icon
2/11/2026Picton Mahoney Asset Management10,500$1.37M0.0%-12.3%0.020%Search for SEC Filing on Google Icon
Data available starting January 2016

See Full Table
Masimo logo
Masimo Corporation develops, manufactures, and markets various patient monitoring technologies, and automation and connectivity solutions worldwide. The company offers masimo signal extraction technology (SET) pulse oximetry with measure-through motion and low perfusion pulse oximetry monitoring to address the primary limitations of conventional pulse oximetry; Masimo rainbow SET platform, including rainbow SET Pulse CO-Oximetry products that allows noninvasive monitoring of carboxyhemoglobin, methemoglobin, hemoglobin concentration, fractional arterial oxygen saturation, oxygen content, pleth variability index, rainbow pleth variability index, respiration rate from the pleth, and oxygen reserve index, as well as acoustic respiration monitoring, SedLine brain function monitoring, NomoLine capnography and gas monitoring, and regional oximetry. It also provides brain function and hemodynamic monitoring solutions; patient position and activity tracking, and neuromodulation technology solutions; and Masimo Hospital Automation platform, including hospital automation solutions, including Patient SafetyNet, Patient SafetyNet Surveillance, SafetyNet, Replica, Iris, MyView, UniView, Uniview: 60, Masimo Sleep, Centroid, and Bridg; and nasal high-flow ventilation, neuromodulation therapeutics, and telehealth solutions. In addition, the company provides its products through direct sales force, distributors, and original equipment manufacturers partners to hospitals, emergency medical service and home care providers, long-term care facilities, physician offices, veterinarians, and consumers; and home wellness products through e-commerce internet sites, such as masimopersonalhealth.com, amazon.com, and shopify.com. Masimo Corporation was incorporated in 1989 and is headquartered in Irvine, California.
Read More on Masimo

Today's Range

Now: $178.24
Low: $178.00
High: $178.83

50 Day Range

MA: $155.79
Low: $129.83
High: $178.70

52 Week Range

Now: $178.24
Low: $125.94
High: $178.87

Volume

2,366,559 shs

Average Volume

2,191,837 shs

Market Capitalization

$9.57 billion

P/E Ratio

N/A

Dividend Yield

N/A

Beta

1.21

Who are the company insiders with the largest holdings of Masimo?

Masimo's top insider shareholders include:
  1. Bilal Muhsin (COO)
  2. Craig B Reynolds (Director)
  3. Michelle Brennan (Chairman)
  4. William R Jellison (Director)
Learn More about top insider investors at Masimo.

Who are the major institutional investors of Masimo?

Masimo's top institutional investors include:
  1. Vanguard Group Inc. — 8.10%
  2. Massachusetts Financial Services Co. MA — 4.96%
  3. T. Rowe Price Investment Management Inc. — 4.34%
  4. Naya Capital Management UK Ltd. — 2.91%
  5. Westfield Capital Management Co. LP — 2.83%
  6. State Street Corp — 2.63%
Learn More about top institutional investors of Masimo stock.

Which major investors are selling Masimo stock?

During the last quarter, MASI stock was sold by these institutional investors:
  1. T. Rowe Price Investment Management Inc.
  2. Capital Research Global Investors
  3. Viking Global Investors LP
  4. Vanguard Group Inc.
  5. Sumitomo Mitsui Trust Group Inc.
  6. Price T Rowe Associates Inc. MD
  7. Comerica Bank
  8. Alyeska Investment Group L.P.

Which major investors are buying Masimo stock?

During the previous quarter, MASI stock was bought by institutional investors including:
  1. Naya Capital Management UK Ltd.
  2. AQR Capital Management LLC
  3. UBS Group AG
  4. Norges Bank
  5. Schonfeld Strategic Advisors LLC
  6. Morgan Stanley
  7. Gotham Asset Management LLC
  8. T. Rowe Price Investment Management Inc.
In the previous year, these company insiders have bought Masimo stock:
  1. Bilal Muhsin (COO)
  2. Craig B Reynolds (Director)
Learn More investors buying Masimo stock.