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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
Elisabeth A. HellmannChief Human Resources Officer2026-04-21121$178.43
$21.59kSell
Catherine M. SzymanCEO2026-03-111,069$175.47
$187.58kSell
Micah W. YoungEVP Chief Financial Officer2026-03-11471$175.47
$82.65kSell
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 Research2026-01-286,560$137.22
$900.16kSell
Anand SampathEVP Ops Clinical Research2026-01-2830,000$37.84
$1.14MBuy
Anand SampathEVP Ops Clinical Research2026-01-2811,924$136.56
$1.63MSell
Anand SampathEVP Ops Clinical Research2026-01-28196$138.09
$27.07kSell

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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 Inc16.91%8,855,619$1.58BInstitution
Fmr LLC15.02%7,864,164$1.40BInstitution
Politan Capital Management LP8.76%4,589,648$819.25MInstitution
Politan Capital Management LP8.76%4,589,648$819.25MInsider
Vanguard Group Inc8.30%4,348,786$776.26MInstitution
Joe E. Kiani6.16%3,226,230$575.88MInsider
Massachusetts Financial Services Co5.09%2,663,875$475.50MInstitution
T Rowe Price Investment Management Inc4.45%2,330,158$415.93MInstitution
Naya Capital Management Uk Ltd2.98%1,560,697$278.58MInstitution
Westfield Capital Management Co LP2.91%1,522,049$271.69MInstitution

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MASI vs Medical Device Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
MASI84.59%15.41%Net BuyingNet Selling
GMED78.15%21.85%Net BuyingNet Buying
GKOS66.04%33.96%Net BuyingNet Selling
PODD80.00%20.00%Net SellingNet 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 106.29% institutional shareholders, 19.36% Masimo insiders, and 0.00% retail investors. Politan Capital Management LP is the largest individual Masimo shareholder, owning 4.59M shares representing 8.76% of the company. Politan Capital Management LP's Masimo shares are currently valued at $819.48M.

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