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Masimo (MASI) Institutional Ownership

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$166.32 +0.91 (+0.55%)
Closing price 04:00 PM Eastern
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$166.38 +0.06 (+0.04%)
As of 04:20 PM Eastern
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Institutional Ownership Changes (13F Filings) for Masimo (NASDAQ:MASI)

Current
Institutional Ownership
Percentage
85.96%
Number of
Institutional Buyers
(last 12 months)
234
Total
Institutional Inflows
(last 12 months)
$2.24B
Number of
Institutional Sellers
(last 12 months)
150
Total
Institutional Outflows
(last 12 months)
$1.36B
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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
7/9/2025Harbor Capital Advisors Inc.26,412$4.44M0.2%N/A0.049%
7/9/2025Westmount Partners LLC25,866$4.35M1.2%-0.5%0.048%
7/8/2025 Parallel Advisors LLC297$50K0.0%-25.2%0.001%
7/1/2025 Harbor Investment Advisory LLC600$101K0.0%-38.1%0.001%
7/1/2025 Kera Capital Partners Inc.1,380$232K0.0%N/A0.003%
6/23/2025Swedbank AB75,900$12.65M0.0%N/A0.140%
6/18/2025Voya Investment Management LLC12,274$2.05M0.0%-2.3%0.023%
5/28/2025Anderson Financial Strategies LLC295$49K0.0%N/A0.001%
5/28/2025Strs Ohio40,135$6.69M0.0%N/A0.074%
5/20/2025Intech Investment Management LLC32,494$5.41M0.1%+26.8%0.060%
5/19/2025Jane Street Group LLC2,050$342K0.0%-94.8%0.004%
5/19/2025UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC189,130$31.51M0.0%-0.6%0.349%
5/16/2025Woodline Partners LP132,969$22.15M0.1%+159.8%0.245%
5/16/2025Empowered Funds LLC2,864$477K0.0%-26.4%0.005%
5/16/2025Logan Capital Management Inc.42,395$7.06M0.3%-11.3%0.078%
5/16/2025United Services Automobile Association2,912$476K0.0%N/A0.005%
5/16/2025Great Lakes Advisors LLC92,872$15.47M0.1%-3.0%0.171%
5/16/2025Fred Alger Management LLC8,772$1.46M0.0%-57.1%0.016%
5/16/2025Goldman Sachs Group Inc.280,255$46.69M0.0%+38.6%0.517%
5/16/2025Jones Financial Companies Lllp2,201$367K0.0%+1,267.1%0.004%
5/16/2025Dynamic Technology Lab Private Ltd1,320$220K0.0%N/A0.002%
5/16/2025PharVision Advisers LLC1,410$235K0.3%N/A0.003%
5/16/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.11,371$1.89M0.0%+0.6%0.021%
5/16/2025Gotham Asset Management LLC144,590$24.09M0.2%+13.2%0.267%
5/16/2025Bridger Management LLC39,300$6.55M3.3%N/A0.072%
5/16/2025Alliancebernstein L.P.865,870$144.25M0.1%-8.6%1.597%
5/16/2025AQR Capital Management LLC8,142$1.31M0.0%+136.5%0.015%
5/16/2025Advisors Asset Management Inc.27,288$4.55M0.1%+18.8%0.050%
5/16/2025Amundi41,167$6.27M0.0%-63.1%0.076%
5/16/2025Alyeska Investment Group L.P.722,534$120.37M0.5%+24.9%1.333%
5/16/20254D Advisors LLC30,000$5.00M3.9%N/A0.055%
5/15/2025Redmile Group LLC26,062$4.34M0.4%N/A0.048%
5/15/2025Birchview Capital LP11,280$1.88M1.6%-26.2%0.021%
5/15/2025Durable Capital Partners LP1,125,619$187.53M1.7%N/A2.076%
5/15/2025Royal Bank of Canada43,884$7.31M0.0%+44.5%0.081%
5/15/2025Alamea Verwaltungs GmbH1,963$327K0.3%N/A0.004%
5/15/2025Quarry LP449$75K0.0%+253.5%0.001%
5/15/2025Twin Tree Management LP175$29K0.0%N/A0.000%
5/15/2025Baird Financial Group Inc.45,120$7.52M0.0%+31.9%0.083%
5/15/2025Vident Advisory LLC2,798$466K0.0%N/A0.005%
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5/15/2025Canada Pension Plan Investment Board15,800$2.63M0.0%-1.9%0.029%
5/15/2025Tema Etfs LLC4,543$757K0.2%-52.6%0.008%
5/15/2025Landscape Capital Management L.L.C.4,998$833K0.1%-10.5%0.009%
5/14/2025Cramer Rosenthal Mcglynn LLC151,664$25.27M1.8%-31.9%0.280%
5/14/2025Corebridge Financial Inc.49,327$8.22M0.0%-2.4%0.091%
5/14/2025Comerica Bank137,855$22.97M0.1%-2.5%0.254%
5/14/2025MetLife Investment Management LLC25,640$4.27M0.0%-1.5%0.047%
5/14/2025Quantitative Investment Management LLC4,462$743K0.1%-9.7%0.008%
5/14/2025Price T Rowe Associates Inc. MD282,637$47.09M0.0%+12.7%0.521%
5/14/2025T. Rowe Price Investment Management Inc.1,673,252$278.76M0.2%+0.7%3.086%
5/14/2025Erste Asset Management GmbH92,000$15.33M0.2%+11.3%0.170%
5/14/2025EntryPoint Capital LLC5,368$894K0.4%N/A0.010%
5/14/2025Wellington Management Group LLP1,297$216K0.0%N/A0.002%
5/13/2025Northern Trust Corp383,356$63.87M0.0%-0.1%0.707%
5/13/2025Versor Investments LP6,978$1.16M0.2%N/A0.013%
5/13/2025Algert Global LLC7,310$1.22M0.0%N/A0.013%
5/13/2025Corient IA LLC1,500$250K0.2%N/A0.003%
5/13/2025Northwest & Ethical Investments L.P.2,100$349K0.0%+200.0%0.004%
5/13/2025Raymond James Financial Inc.206,116$34.34M0.0%+1.1%0.380%
5/13/2025State of New Jersey Common Pension Fund D15,867$2.64M0.0%-5.2%0.029%
5/13/2025American Century Companies Inc.79,176$13.19M0.0%+525.5%0.146%
5/13/2025Liontrust Investment Partners LLP747,498$124.53M1.9%-5.7%1.379%
5/13/2025Dimensional Fund Advisors LP703,378$117.17M0.0%+8.6%1.297%
5/13/2025Vestmark Advisory Solutions Inc.3,274$545K0.0%+6.1%0.006%
5/13/2025Mitsubishi UFJ Asset Management UK Ltd.8,000$1.33M0.7%N/A0.015%
5/13/2025Neuberger Berman Group LLC74,962$12.49M0.0%-45.7%0.138%
5/13/2025Montanaro Asset Management Ltd32,300$5.38M1.6%-30.5%0.060%
5/13/2025Russell Investments Group Ltd.34,747$5.79M0.0%+76.4%0.064%
5/13/2025Informed Momentum Co LLC22,952$3.82M0.7%N/A0.042%
5/13/2025HighTower Advisors LLC4,550$758K0.0%-33.2%0.008%
5/12/2025Nuveen LLC155,045$25.83M0.0%N/A0.286%
5/12/2025Aigen Investment Management LP1,627$271K0.0%N/A0.003%
5/12/2025Entropy Technologies LP1,803$300K0.0%N/A0.003%
5/12/2025Invesco Ltd.261,358$43.54M0.0%-6.0%0.482%
5/12/2025Townsquare Capital LLC9,870$1.64M0.0%+21.5%0.018%
5/12/2025NS Partners Ltd43,555$7.26M0.3%+2.1%0.080%
5/12/2025Citigroup Inc.52,158$8.69M0.0%-43.1%0.096%
5/12/2025Swiss National Bank88,200$14.69M0.0%-1.3%0.163%
5/12/2025Mitsubishi UFJ Asset Management Co. Ltd.4,039$673K0.0%+2.9%0.007%
5/12/2025Maryland State Retirement & Pension System2,028$338K0.0%-17.1%0.004%
5/9/2025Deutsche Bank AG6,309$1.05M0.0%+1.5%0.012%
5/9/2025Charles Schwab Investment Management Inc.377,070$62.82M0.0%-0.2%0.698%
5/9/2025Vanguard Group Inc.4,583,276$763.57M0.0%-0.1%8.482%
5/9/2025New Age Alpha Advisors LLC2,270$378K0.0%-42.8%0.004%
5/9/2025Westfield Capital Management Co. LP671,479$111.87M0.5%-12.7%1.243%
5/9/2025Bank of Nova Scotia93,203$15.53M0.0%N/A0.172%
5/9/2025Malaga Cove Capital LLC2,906$484K0.2%-2.6%0.005%
5/9/2025PNC Financial Services Group Inc.5,684$947K0.0%+21.3%0.011%
5/8/2025Commerce Bank5,024$837K0.0%+2.5%0.009%
5/8/2025Wealthquest Corp2,112$352K0.0%N/A0.004%
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5/8/2025North Star Asset Management Inc.1,910$318K0.0%-25.5%0.004%
5/8/2025Vestcor Inc3,825$637K0.0%N/A0.007%
5/8/2025Federated Hermes Inc.51,002$8.50M0.0%-3.3%0.094%
5/7/2025Picton Mahoney Asset Management44,152$7.36M0.1%+3.6%0.082%
5/7/2025TD Asset Management Inc88,668$14.77M0.0%+4.8%0.164%
5/7/2025DE Burlo Group Inc.8,402$1.40M0.2%-1.8%0.016%
5/6/2025Neo Ivy Capital Management10,248$1.71M0.5%N/A0.019%
5/6/2025Assetmark Inc.1,466$244K0.0%+25.7%0.003%
5/6/2025Cetera Investment Advisers1,600$267K0.0%-13.3%0.003%
5/6/2025Legato Capital Management LLC5,245$874K0.1%N/A0.010%
(Data available from 1/1/2016 forward)

MASI Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of MASI shares?

During the previous two years, 429 institutional investors and hedge funds held shares of Masimo. The most heavily invested institutionals were FMR LLC ($1.34B), BlackRock Inc. ($1.01B), Politan Capital Management LP ($775.61M), Vanguard Group Inc. ($763.57M), Capital Research Global Investors ($405.81M), Massachusetts Financial Services Co. MA ($327.84M), and T. Rowe Price Investment Management Inc. ($278.76M).Learn more on Masimo's institutional investors.

What percentage of Masimo's stock is owned by institutional investors?

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

Which institutional investors have been buying Masimo's stock?

Of the 332 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 ($2.85M), Capital Research Global Investors ($1.23M), Durable Capital Partners LP ($1.13M), Eminence Capital LP ($1.04M), Alliancebernstein L.P. ($878.59K), and Westfield Capital Management Co. LP ($477.17K).

How much institutional buying is happening at Masimo?

Institutional investors have bought a total of 14,385,776 shares in the last 24 months. This purchase volume represents approximately $2.24B in transactions.

Which of Masimo's major shareholders have been selling company stock?

Of the 151 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: Farallon Capital Management LLC ($1.23M), Thrivent Financial for Lutherans ($1.21M), Ace Management Global Ltd. ($1.01M), Massachusetts Financial Services Co. MA ($1.00M), RTW Investments LP ($779.11K), Man Group plc ($335.06K), and Two Sigma Investments LP ($302.94K).

How much institutional selling is happening at Masimo?

Institutional investors have sold a total of 8,964,188 shares in the last 24 months. This volume of shares sold represents approximately $1.36B in transactions.


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This page (NASDAQ:MASI) was last updated on 7/10/2025 by MarketBeat.com Staff
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