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NASDAQ: MASI
Masimo Corp Stock Ownership - Who owns Masimo?

OverviewForecastEarningsRevenueDividendOwnership

Insider buying vs selling

Have Masimo Corp insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Micah W. YoungEVP Chief Financial Officer2026-03-11471$175.47
$82.65kSell
Catherine M. SzymanCEO2026-03-111,069$175.47
$187.58kSell
Micah W. YoungEVP Chief Financial Officer2026-02-278,093$175.35
$1.42MSell
Micah W. YoungEVP Chief Financial Officer2026-02-261,123$175.22
$196.77kSell
Catherine M. SzymanCEO2026-02-1211,141$132.96
$1.48MBuy
Anand SampathEVP Ops Clinical Research2026-01-2811,924$136.56
$1.63MSell
Anand SampathEVP Ops Clinical Research2026-01-2830,000$37.84
$1.14MBuy
Anand SampathEVP Ops Clinical Research2026-01-286,560$137.22
$900.16kSell
Anand SampathEVP Ops Clinical Research2026-01-28196$138.09
$27.07kSell
Omar AhmedCTIO EVP of Engineering2025-11-132,474$152.43
$377.11kBuy

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Net Insider Buy/Sell (L12M) Ownership

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MASI Shareholders

What type of owners hold Masimo Corp stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Blackrock Inc16.97%8,855,619$1.58BInstitution
Fmr LLC15.07%7,864,164$1.40BInstitution
Politan Capital Management LP8.79%4,589,648$817.37MInsider
Politan Capital Management LP8.79%4,589,648$817.37MInstitution
Vanguard Group Inc8.33%4,348,786$774.48MInstitution
Joe E. Kiani6.18%3,226,230$574.56MInsider
Massachusetts Financial Services Co5.10%2,663,875$474.41MInstitution
T Rowe Price Investment Management Inc4.46%2,330,158$414.98MInstitution
Naya Capital Management Uk Ltd2.99%1,560,697$277.94MInstitution
Westfield Capital Management Co LP2.92%1,522,049$271.06MInstitution

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MASI vs Medical Device Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
MASI84.60%15.40%Net BuyingNet Buying
BIO23.66%76.34%Net Selling
GMED78.15%21.85%Net BuyingNet Selling
GKOS66.07%33.93%Net BuyingNet Buying
ALGN84.98%15.02%Net SellingNet Selling
View Top Medical Device Stocks

Masimo Stock Ownership FAQ

Who owns Masimo?

Masimo (NASDAQ: MASI) is owned by 106.64% institutional shareholders, 19.42% Masimo insiders, and 0.00% retail investors. Politan Capital Management LP is the largest individual Masimo shareholder, owning 4.59M shares representing 8.79% of the company. Politan Capital Management LP's Masimo shares are currently valued at $811.86M.

If you're new to stock investing, here's how to buy Masimo stock.
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