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Masimo (MASI) Institutional Ownership

Masimo logo
$178.81 0.00 (0.00%)
Closing price 05/22/2026 04:00 PM Eastern
Extended Trading
$178.64 -0.17 (-0.09%)
As of 05/22/2026 08:00 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
Compare

Institutional Ownership Changes (13F Filings) for Masimo (NASDAQ:MASI)

Current
Institutional Ownership
Percentage
85.96%
Number of
Institutional Buyers
(last 12 months)
257
Total
Institutional Inflows
(last 12 months)
$2.31B
Number of
Institutional Sellers
(last 12 months)
165
Total
Institutional Outflows
(last 12 months)
$1.38B
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Skip Chart & View Institutional Buying and Selling Data

MASI Institutional Buying and Selling by Quarter

Masimo Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
5/21/2026 Essential Partners LLC1,183$210K0.1%+33.4%0.002%
5/21/2026 Groupe la Francaise31,950$5.68M0.1%N/A0.061%
5/20/2026 Liontrust Investment Partners LLP20,138$3.58M0.1%-96.8%0.038%
5/19/2026 Western Wealth Management LLC250$44K0.0%N/A0.000%
5/19/2026 Bank of America Corp DE232,003$41.27M0.0%-18.5%0.443%
5/19/2026 Bull Harbor Capital LLC2,151$383K0.1%N/A0.004%
5/19/2026 South Dakota Investment Council17,568$3.13M0.1%-17.4%0.034%
5/18/2026 Amundi243,143$43.25M0.0%+454.4%0.464%
5/18/2026 EverSource Wealth Advisors LLC1,064$189K0.0%+9.0%0.002%
5/18/2026 California State Teachers Retirement System53,287$9.48M0.0%+21.6%0.102%
5/18/2026 Readystate Asset Management LP171,115$30.44M1.4%N/A0.327%
5/18/2026 Royal Bank of Canada2,748$489K0.0%-75.8%0.005%
5/18/2026 Empowered Funds LLC1,376$245K0.0%-14.2%0.003%
5/16/2026 The Manufacturers Life Insurance Company 23,637$4.20M0.0%-28.8%0.045%
5/16/2026 Quantinno Capital Management LP22,501$4.00M0.0%+69.8%0.043%
5/16/2026 Whitebox Advisors LLC270,001$48.03M0.6%N/A0.516%
5/16/2026 SummitTX Capital L.P.7,000$1.25M0.0%+336.7%0.013%
5/15/2026 Weiss Asset Management LP112,600$20.03M0.3%N/A0.215%
5/15/2026 Waverly Advisors LLC1,415$252K0.0%N/A0.003%
5/15/2026 Kryger Capital LLC100,589$17.89M1.3%N/A0.192%
5/14/2026 Healthcare of Ontario Pension Plan Trust Fund67,600$12.02M0.0%N/A0.129%
5/14/2026 Renaissance Technologies LLC239,500$42.60M0.1%+299.8%0.457%
5/14/2026 Gabelli Funds LLC126,082$22.43M0.2%+285.6%0.241%
5/14/2026 GABELLI & Co INVESTMENT ADVISERS INC.88,650$15.77M2.3%N/A0.169%
5/14/2026 Gamco Investors INC. ET AL92,000$16.36M0.2%+10.8%0.176%
5/14/2026 Public Employees Retirement System of Ohio13,446$2.39M0.0%-3.1%0.026%
5/14/2026 Arrowstreet Capital Limited Partnership172,588$30.70M0.0%N/A0.330%
5/14/2026 Caxton Associates LLP45,917$8.17M0.2%N/A0.088%
5/14/2026 Capula Management Ltd142,800$25.40M0.2%N/A0.273%
5/14/2026 Bank of Nova Scotia152,584$27.14M0.0%+2,808.0%0.291%
5/14/2026 Sei Investments Co.13,195$2.35M0.0%+71.0%0.025%
5/8/2026 PNC Financial Services Group Inc.5,107$908K0.0%-29.9%0.010%
5/7/2026 Dimensional Fund Advisors LP164,402$29.24M0.0%-5.5%0.315%
5/7/2026 Parallel Advisors LLC624$111K0.0%+119.7%0.001%
5/7/2026 Swiss National Bank90,300$16.06M0.0%-0.9%0.173%
5/6/2026 California Public Employees Retirement System77,397$13.77M0.0%+22.2%0.148%
5/6/2026 Assetmark Inc.2,068$368K0.0%+11.8%0.004%
5/6/2026 Bessemer Group Inc.1,857$331K0.0%+1,217.0%0.004%
5/5/2026 Bank of New York Mellon Corp306,400$54.50M0.0%-0.7%0.570%
5/5/2026 Illinois Municipal Retirement Fund7,626$1.36M0.0%-32.9%0.014%
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5/4/2026 ABC Arbitrage SA23,604$4.20M0.6%N/A0.044%
5/4/2026 Calamos Wealth Management LLC1,511$269K0.0%N/A0.003%
5/4/2026 Calamos Advisors LLC1,511$269K0.0%N/A0.003%
5/4/2026 State of Michigan Retirement System10,996$1.96M0.0%+1.9%0.020%
5/4/2026 Principal Financial Group Inc.102,718$18.27M0.0%+5.0%0.191%
5/1/2026 180 Wealth Advisors LLC2,728$485K0.1%+2.5%0.005%
5/1/2026 Commonwealth of Pennsylvania Public School Empls Retrmt SYS18,940$3.37M0.0%+65.8%0.035%
5/1/2026 Fifth Third Bancorp11,736$2.09M0.0%+1,934.0%0.022%
4/30/2026 Hsbc Holdings PLC473,434$84.27M0.0%N/A0.881%
4/30/2026 Oregon Public Employees Retirement Fund9,374$1.67M0.0%+3.3%0.017%
4/29/2026 R Squared Ltd1,289$229K0.1%N/A0.002%
4/29/2026 Credit Industriel ET Commercial23,050$4.10M0.3%N/A0.043%
4/29/2026 Canvas Wealth Advisors LLC3,191$568K0.1%N/A0.006%
4/28/2026 Hardy Reed LLC2,381$424K0.0%+9.6%0.004%
4/28/2026 Praxis Investment Management Inc.1,773$315K0.0%N/A0.003%
4/27/2026 HB Wealth Management LLC2,704$481K0.0%+15.7%0.005%
4/27/2026 New York State Teachers Retirement System38,569$6.86M0.0%-3.7%0.072%
4/25/2026 Strs Ohio37,213$6.62M0.0%+0.8%0.069%
4/24/2026 Root Financial Partners LLC457$81K0.0%+7,516.7%0.001%
4/24/2026 Capricorn Fund Managers Ltd22,811$4.06M0.6%N/A0.042%
4/22/2026 Pictet Asset Management Holding SA7,020$1.25M0.0%+7.3%0.013%
4/22/2026 Sterling Capital Management LLC322$57K0.0%-97.0%0.001%
4/22/2026 Ground Swell Capital LLC1,319$235K0.5%N/A0.002%
4/21/2026 Pinnacle Wealth Management Advisory Group LLC1,324$236K0.0%N/A0.002%
4/21/2026 Louisiana State Employees Retirement System13,200$2.35M0.0%N/A0.025%
4/21/2026 Silver Oak Securities Incorporated1,755$312K0.0%-10.2%0.003%
4/20/2026 Blue Trust Inc.232$41K0.0%-24.2%0.000%
4/20/2026 Fifth Third Wealth Advisors LLC1,528$272K0.0%N/A0.003%
4/17/2026 Krilogy Financial LLC1,879$335K0.0%-44.1%0.003%
4/17/2026 Andina Capital Management LLC1,420$253K0.2%N/A0.003%
4/16/2026 SG Americas Securities LLC522,824$93.00M0.1%+3,082.3%0.973%
4/16/2026 Evolve Private Wealth LLC1,713$305K0.0%N/A0.003%
4/16/2026 Diversified Trust Co4,685$833K0.0%N/A0.009%
3/17/2026 Rockefeller Capital Management L.P.86,411$11.24M0.0%-41.4%0.161%
3/9/2026 Corient Private Wealth LLC340,230$44.25M0.1%+1.2%0.633%
3/3/2026 Caitong International Asset Management Co. Ltd890$116K0.0%N/A0.002%
2/24/2026 Pacer Advisors Inc.7,360$957K0.0%+21.1%0.014%
2/23/2026 Virtu Financial LLC1,985$258K0.0%N/A0.004%
2/19/2026 T. Rowe Price Investment Management Inc.2,330,158$303.06M0.2%+9.6%4.338%
2/19/2026 Invesco Ltd.319,308$41.53M0.0%-0.6%0.595%
2/19/2026 Corient Private Wealth LLC341,730$44.45M0.0%+1.6%0.636%
2/18/2026 Mercer Global Advisors Inc. ADV10,862$1.41M0.0%N/A0.020%
2/18/2026 Naya Capital Management UK Ltd.1,560,697$202.98M15.3%N/A2.906%
2/18/2026 State of Tennessee Department of Treasury13,918$1.91M0.0%-4.1%0.026%
2/18/2026 Empowered Funds LLC1,603$208K0.0%-34.9%0.003%
2/18/2026 XTX Topco Ltd12,746$1.66M0.0%N/A0.024%
2/18/2026 nVerses Capital LLC2,067$269K0.6%N/A0.004%
2/18/2026 Voloridge Investment Management LLC39,557$5.15M0.0%+1,281.7%0.074%
2/18/2026 Wellington Management Group LLP7,832$1.02M0.0%+257.0%0.015%
2/18/2026 SummitTX Capital L.P.1,603$208K0.0%N/A0.003%
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2/18/2026 Tudor Investment Corp ET AL16,242$2.11M0.0%-48.7%0.030%
2/18/2026 Polymer Capital Management US LLC9,523$1.24M0.1%+62.1%0.018%
2/18/2026 Occudo Quantitative Strategies LP9,663$1.26M0.1%+87.7%0.018%
2/18/2026 Millennium Management LLC187,965$24.45M0.0%+1,065.2%0.350%
2/18/2026 Man Group plc147,416$19.17M0.0%N/A0.274%
2/18/2026 Gotham Asset Management LLC342,194$44.51M0.2%+165.2%0.637%
2/18/2026 Engineers Gate Manager LP83,458$10.86M0.1%+171.2%0.155%
2/18/2026 Cinctive Capital Management LP5,681$739K0.0%N/A0.011%
2/18/2026 Bamco Inc. NY373,899$48.63M0.1%-3.8%0.696%
2/17/2026 Viking Global Investors LP514,340$66.90M0.2%-52.1%0.958%


MASI Institutional Ownership - Frequently Asked Questions

During the previous two years, 437 institutional investors and hedge funds held shares of Masimo. The most heavily invested institutionals were FMR LLC ($1.34B), Politan Capital Management LP ($677.20M), Vanguard Group Inc. ($565.60M), Massachusetts Financial Services Co. MA ($346.46M), T. Rowe Price Investment Management Inc. ($303.06M), Holocene Advisors LP ($209.20M), and Naya Capital Management UK Ltd. ($202.98M).Learn more on Masimo's institutional investors.

85.96% of Masimo's stock is owned by institutional investors. Learn more on MASI's institutional investor holdings.

Of the 379 institutional investors that purchased Masimo's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: FMR LLC ($3.31M), Massachusetts Financial Services Co. MA ($1.94M), Naya Capital Management UK Ltd. ($1.56M), Durable Capital Partners LP ($1.16M), Westfield Capital Management Co. LP ($1.11M), AQR Capital Management LLC ($1.11M), and Capital Research Global Investors ($1.09M).

Institutional investors have bought a total of 15,265,127 shares in the last 24 months. This purchase volume represents approximately $2.31B in transactions.

Of the 165 institutional investors that sold Masimo's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: T. Rowe Price Investment Management Inc. ($1.53M), Capital Research Global Investors ($1.22M), Alliancebernstein L.P. ($812.31K), Liontrust Investment Partners LLP ($646.86K), Viking Global Investors LP ($559.09K), Durable Capital Partners LP ($543.28K), and Vanguard Group Inc. ($461.23K).

Institutional investors have sold a total of 9,714,543 shares in the last 24 months. This volume of shares sold represents approximately $1.38B in transactions.


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This page (NASDAQ:MASI) was last updated on 5/25/2026 by MarketBeat.com Staff.
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