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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
Politan Capital Management LP8.76%4,589,648$819.11MInsider
Joe E. Kiani6.16%3,226,230$575.79MInsider
Vanguard Capital Management LLC3.91%2,050,045$365.87MInstitution
Vanguard Portfolio Management LLC3.83%2,006,861$358.16MInstitution
Edward L. Cahill1.23%642,270$114.63MInsider
Citigroup Inc1.02%533,388$95.19MInstitution
Bradley Langdale1.01%531,330$94.83MInsider
Sg Americas Securities LLC1.00%522,824$93.31MInstitution
Hsbc Holdings PLC0.90%473,434$84.49MInstitution
Ubs Group Ag0.89%468,257$83.57MInstitution

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MASI vs Medical Device Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
MASI19.50%19.36%Net BuyingNet Selling
PODD35.47%25.43%Net SellingNet Buying
GKOS30.09%50.00%Net BuyingNet Selling
GMED28.44%22.90%Net BuyingNet Buying
ALGN35.24%16.35%Net SellingNet Selling
View Top Medical Device Stocks

Masimo Stock Ownership FAQ

Who owns Masimo?

Masimo (NASDAQ: MASI) is owned by 19.50% institutional shareholders, 19.36% Masimo insiders, and 61.14% 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 $819.11M.

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