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MASI Insider Trading

Insider Ownership Percentage: 16.90%
Insider Buying (Last 12 Months): $452,975.00
Insider Selling (Last 12 Months): $6,998,564.89

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: $139.13
Price Change: ▲ Price Increase of +0.71 (0.51%)
As of 02/3/2026 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
2/3/2026Swedbank AB59,500$7.74M0.0%-11.9%0.111%Search for SEC Filing on Google Icon
2/3/2026Mitsubishi UFJ Asset Management Co. Ltd.3,502$0.45M0.0%-15.7%0.007%Search for SEC Filing on Google Icon
2/3/2026Wilson Asset Management International PTY Ltd.39,437$5.13M1.3%+44.8%0.073%Search for SEC Filing on Google Icon
2/2/2026Oppenheimer Asset Management Inc.2,503$0.33M0.0%-10.5%0.005%Search for SEC Filing on Google Icon
1/30/2026Cardinal Capital Management21,462$2.79M0.4%+1.3%0.040%Search for SEC Filing on Google Icon
1/30/2026Kohmann Bosshard Financial Services LLC342$44K0.0%N/A0.001%Search for SEC Filing on Google Icon
1/30/2026Torren Management LLC269$35K0.0%N/A0.001%Search for SEC Filing on Google Icon
1/30/2026M&T Bank Corp3,324$0.43M0.0%+10.5%0.006%Search for SEC Filing on Google Icon
1/29/2026Comerica Bank12,233$1.59M0.0%-94.8%0.023%Search for SEC Filing on Google Icon
1/29/2026Pictet Asset Management Holding SA6,540$0.85M0.0%-4.4%0.012%Search for SEC Filing on Google Icon
1/29/2026State of Michigan Retirement System10,796$1.40M0.0%-1.8%0.020%Search for SEC Filing on Google Icon
1/29/2026UBS Group AG599,274$77.94M0.0%+252.9%1.116%Search for SEC Filing on Google Icon
1/29/2026Sanctuary Advisors LLC1,672$0.22M0.0%N/A0.003%Search for SEC Filing on Google Icon
1/29/2026Vanguard Group Inc.4,348,786$565.60M0.0%-9.6%8.097%Search for SEC Filing on Google Icon
1/28/2026Arizona State Retirement System12,818$1.67M0.0%-5.8%0.024%Search for SEC Filing on Google Icon
1/28/2026HB Wealth Management LLC2,337$0.30M0.0%N/A0.004%Search for SEC Filing on Google Icon
1/28/2026M&T Bank Corp9,585$1.25M0.0%+218.8%0.018%Search for SEC Filing on Google Icon
1/27/2026Zurcher Kantonalbank Zurich Cantonalbank 9,698$1.26M0.0%+5.5%0.018%Search for SEC Filing on Google Icon
1/27/2026Krilogy Financial LLC3,362$0.47M0.0%N/A0.006%Search for SEC Filing on Google Icon
1/27/2026Bayforest Capital Ltd464$60K0.0%-87.0%0.001%Search for SEC Filing on Google Icon
1/27/2026Lecap Asset Management Ltd.13,196$1.72M0.7%N/A0.025%Search for SEC Filing on Google Icon
1/26/2026Merit Financial Group LLC2,981$0.39M0.0%N/A0.006%Search for SEC Filing on Google Icon
1/26/2026CWM LLC18,535$2.41M0.0%+2,045.3%0.035%Search for SEC Filing on Google Icon
1/23/2026Farther Finance Advisors LLC2,144$0.28M0.0%+99.6%0.004%Search for SEC Filing on Google Icon
1/23/2026Assetmark Inc.1,850$0.24M0.0%+5.5%0.003%Search for SEC Filing on Google Icon
1/23/2026State of Alaska Department of Revenue4,602$0.60M0.0%-8.8%0.009%Search for SEC Filing on Google Icon
1/23/2026Sumitomo Mitsui Trust Group Inc.14,572$1.90M0.0%-96.3%0.027%Search for SEC Filing on Google Icon
1/22/2026Massachusetts Financial Services Co. MA2,663,875$346.46M0.1%+1.7%4.960%Search for SEC Filing on Google Icon
1/21/2026Yousif Capital Management LLC14,528$2.07M0.0%-2.4%0.027%Search for SEC Filing on Google Icon
1/20/2026Harbor Capital Advisors Inc.9,599$1.25M0.1%-3.4%0.018%Search for SEC Filing on Google Icon
1/16/2026Tema Etfs LLC4,342$0.57M0.0%-3.1%0.008%Search for SEC Filing on Google Icon
1/15/2026Westmount Partners LLC24,232$3.15M0.8%-6.3%0.045%Search for SEC Filing on Google Icon
1/15/2026Retirement Systems of Alabama54,795$7.13M0.0%-1.9%0.102%Search for SEC Filing on Google Icon
1/14/2026Exchange Traded Concepts LLC5,101$0.66M0.0%+17.8%0.009%Search for SEC Filing on Google Icon
1/12/2026Orser Capital Management LLC2,450$0.32M0.2%N/A0.005%Search for SEC Filing on Google Icon
1/9/2026SG Americas Securities LLC16,429$2.14M0.0%+84.2%0.031%Search for SEC Filing on Google Icon
1/9/2026Assenagon Asset Management S.A.53,525$6.96M0.0%+2,078.5%0.100%Search for SEC Filing on Google Icon
1/8/2026Wealth Enhancement Advisory Services LLC11,371$1.56M0.0%+483.7%0.021%Search for SEC Filing on Google Icon
1/8/2026NorthCrest Asset Manangement LLC3,133$0.42M0.0%N/A0.006%Search for SEC Filing on Google Icon
1/8/2026Nordea Investment Management AB28,319$3.69M0.0%-12.9%0.053%Search for SEC Filing on Google Icon
1/7/2026Harbor Investment Advisory LLC624$81K0.0%-37.5%0.001%Search for SEC Filing on Google Icon
1/5/2026GAMMA Investing LLC283$37K0.0%-43.8%0.001%Search for SEC Filing on Google Icon
1/1/2026JPMorgan Chase & Co.107,941$15.93M0.0%-21.8%0.201%Search for SEC Filing on Google Icon
1/1/2026Tudor Investment Corp ET AL31,641$4.67M0.0%N/A0.059%Search for SEC Filing on Google Icon
12/9/2025Tudor Investment Corp ET AL31,641$4.67M0.0%N/A0.059%Search for SEC Filing on Google Icon
12/2/2025Allworth Financial LP905$0.13M0.0%+133.9%0.002%Search for SEC Filing on Google Icon
12/2/2025Swiss Life Asset Management Ltd2,173$0.32M0.0%+78.8%0.004%Search for SEC Filing on Google Icon
11/20/2025Wilmington Savings Fund Society FSB8,899$1.31M0.0%-10.6%0.017%Search for SEC Filing on Google Icon
11/19/2025Coldstream Capital Management Inc.2,668$0.39M0.0%+17.2%0.005%Search for SEC Filing on Google Icon
11/19/2025Danske Bank A S400$59K0.0%N/A0.001%Search for SEC Filing on Google Icon
11/18/2025Advisory Services Network LLC315$46K0.0%N/A0.001%Search for SEC Filing on Google Icon
11/17/2025CANADA LIFE ASSURANCE Co27,120$3.87M0.0%+3.8%0.050%Search for SEC Filing on Google Icon
11/17/2025Dark Forest Capital Management LP10,009$1.48M0.0%N/A0.019%Search for SEC Filing on Google Icon
11/17/2025PharVision Advisers LLC3,909$0.58M0.3%N/A0.007%Search for SEC Filing on Google Icon
11/17/2025Alyeska Investment Group L.P.1,381,085$203.78M0.6%+21.7%2.571%Search for SEC Filing on Google Icon
11/17/2025Verition Fund Management LLC9,403$1.39M0.0%-48.7%0.018%Search for SEC Filing on Google Icon
11/17/2025Tidal Investments LLC132,557$19.56M0.0%+24.8%0.247%Search for SEC Filing on Google Icon
11/17/2025Sherbrooke Park Advisers LLC5,905$0.87M0.4%N/A0.011%Search for SEC Filing on Google Icon
11/17/2025Politan Capital Management LP4,589,648$677.20M61.5%-2.7%8.545%Search for SEC Filing on Google Icon
11/17/2025Polymer Capital Management US LLC5,876$0.87M0.1%N/A0.011%Search for SEC Filing on Google Icon
11/17/2025Quarry LP649$96K0.0%N/A0.001%Search for SEC Filing on Google Icon
11/17/2025Northern Trust Corp392,142$57.86M0.0%+0.9%0.730%Search for SEC Filing on Google Icon
11/17/2025Millennium Management LLC16,131$2.38M0.0%+312.9%0.030%Search for SEC Filing on Google Icon
11/17/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.12,859$1.90M0.0%+16.2%0.024%Search for SEC Filing on Google Icon
11/17/2025Gotham Asset Management LLC129,026$19.04M0.1%-22.0%0.240%Search for SEC Filing on Google Icon
11/17/2025Brevan Howard Capital Management LP2,893$0.43M0.0%-17.0%0.005%Search for SEC Filing on Google Icon
11/17/2025Bamco Inc. NY388,747$57.36M0.2%+1.1%0.724%Search for SEC Filing on Google Icon
11/17/2025California Public Employees Retirement System78,460$11.58M0.0%+7.8%0.146%Search for SEC Filing on Google Icon
11/17/2025Bank of America Corp DE405,061$59.77M0.0%+113.0%0.754%Search for SEC Filing on Google Icon
11/17/2025Alliancebernstein L.P.53,561$7.90M0.0%-93.7%0.100%Search for SEC Filing on Google Icon
11/17/2025Ameriprise Financial Inc.460,951$68.01M0.0%+16.8%0.858%Search for SEC Filing on Google Icon
11/14/2025Schonfeld Strategic Advisors LLC10,884$1.61M0.0%-23.6%0.020%Search for SEC Filing on Google Icon
11/14/2025Creative Planning11,034$1.63M0.0%-1.2%0.021%Search for SEC Filing on Google Icon
11/14/2025Viking Global Investors LP1,073,433$158.39M0.4%+39.9%1.998%Search for SEC Filing on Google Icon
11/14/2025Durable Capital Partners LP620,619$91.57M0.7%-46.7%1.155%Search for SEC Filing on Google Icon
11/14/2025Raymond James Financial Inc.196,021$28.92M0.0%-2.1%0.365%Search for SEC Filing on Google Icon
11/14/2025Bellevue Group AG96,968$14.31M0.3%+8.1%0.181%Search for SEC Filing on Google Icon
11/14/2025Amundi84,894$12.58M0.0%+104.2%0.158%Search for SEC Filing on Google Icon
11/14/2025Occudo Quantitative Strategies LP5,148$0.76M0.1%+143.4%0.010%Search for SEC Filing on Google Icon
11/14/2025Logan Capital Management Inc.25,105$3.70M0.2%-19.9%0.047%Search for SEC Filing on Google Icon
11/14/2025ADAR1 Capital Management LLC15,000$2.21M0.2%N/A0.028%Search for SEC Filing on Google Icon
11/14/2025Zurcher Kantonalbank Zurich Cantonalbank 9,190$1.36M0.0%+3.8%0.017%Search for SEC Filing on Google Icon
11/14/2025DF Dent & Co. Inc.108,653$16.03M0.2%N/A0.202%Search for SEC Filing on Google Icon
11/14/2025Fiduciary Trust Co2,035$0.30M0.0%N/A0.004%Search for SEC Filing on Google Icon
11/14/2025UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC109,110$16.10M0.0%-47.9%0.203%Search for SEC Filing on Google Icon
11/14/2025Squarepoint Ops LLC620,932$91.62M0.1%+738.8%1.156%Search for SEC Filing on Google Icon
11/14/2025iSAM Funds UK Ltd699$0.10M0.0%N/A0.001%Search for SEC Filing on Google Icon
11/14/2025Comerica Bank233,427$34.44M0.1%+23.0%0.435%Search for SEC Filing on Google Icon
11/14/2025Onex Canada Asset Management Inc.27,923$4.12M0.5%+239.5%0.052%Search for SEC Filing on Google Icon
11/14/2025Alpha Wave Global LP97,102$14.33M1.5%-4.9%0.181%Search for SEC Filing on Google Icon
11/14/2025FORA Capital LLC3,622$0.53M0.1%N/A0.007%Search for SEC Filing on Google Icon
11/13/2025Marshall Wace LLP134,122$19.79M0.0%+1,760.7%0.250%Search for SEC Filing on Google Icon
11/13/2025Entropy Technologies LP16,809$2.48M0.2%+110.1%0.031%Search for SEC Filing on Google Icon
11/13/2025Landscape Capital Management L.L.C.15,292$2.26M0.1%+117.6%0.028%Search for SEC Filing on Google Icon
11/13/2025Quantitative Investment Management LLC12,025$1.77M0.2%N/A0.022%Search for SEC Filing on Google Icon
11/13/2025Invesco Ltd.321,363$47.42M0.0%+35.4%0.598%Search for SEC Filing on Google Icon
11/13/2025Sei Investments Co.21,655$3.20M0.0%-29.0%0.040%Search for SEC Filing on Google Icon
11/13/2025UBS Group AG169,800$25.05M0.0%+19.4%0.316%Search for SEC Filing on Google Icon
11/13/2025Capital Fund Management S.A.34,424$5.08M0.0%N/A0.064%Search for SEC Filing on Google Icon
11/13/2025BNP Paribas Financial Markets14,507$2.14M0.0%+223.6%0.027%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: $139.13
Low: $136.80
High: $141.75

50 Day Range

MA: $137.71
Low: $127.40
High: $146.21

52 Week Range

Now: $139.13
Low: $125.94
High: $194.88

Volume

715,523 shs

Average Volume

726,987 shs

Market Capitalization

$7.47 billion

P/E Ratio

N/A

Dividend Yield

N/A

Beta

1.26

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. UBS Group AG — 1.12%
  4. Retirement Systems of Alabama — 0.10%
  5. Assenagon Asset Management S.A. — 0.10%
  6. Nordea Investment Management AB — 0.05%
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. Vanguard Group Inc.
  2. Sumitomo Mitsui Trust Group Inc.
  3. Comerica Bank
  4. Nordea Investment Management AB
  5. Bayforest Capital Ltd
  6. Westmount Partners LLC
  7. Retirement Systems of Alabama
  8. Arizona State Retirement System
Within the last year, company insiders that have sold Masimo company stock include:
  1. Bilal Muhsin (COO)
  2. Craig B Reynolds (Director)
Learn More investors selling Masimo stock.

Which major investors are buying Masimo stock?

In the previous quarter, MASI stock was acquired by institutional investors including:
  1. UBS Group AG
  2. Assenagon Asset Management S.A.
  3. Massachusetts Financial Services Co. MA
  4. CWM LLC
  5. Lecap Asset Management Ltd.
  6. Wealth Enhancement Advisory Services LLC
  7. SG Americas Securities LLC
  8. M&T Bank Corp
Within 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.