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Masimo (MASI) Institutional Ownership

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$147.78 -0.95 (-0.64%)
Closing price 10/24/2025 04:00 PM Eastern
Extended Trading
$147.80 +0.03 (+0.02%)
As of 10/24/2025 04:10 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 Polygon.io. Learn more.
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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)
246
Total
Institutional Inflows
(last 12 months)
$2.62B
Number of
Institutional Sellers
(last 12 months)
167
Total
Institutional Outflows
(last 12 months)
$1.31B
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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
10/24/2025Bayforest Capital Ltd3,559$525K0.2%-46.9%0.007%
10/23/2025 Cardinal Capital Management21,180$3.13M0.4%+4.7%0.039%
10/23/2025 SG Americas Securities LLC8,919$1.32M0.0%-39.6%0.016%
10/23/2025 KLP Kapitalforvaltning AS9,800$1.45M0.0%+4.3%0.018%
10/22/2025 Louisiana State Employees Retirement System12,900$1.90M0.0%+1.6%0.024%
10/21/2025 SteelPeak Wealth LLC5,292$781K0.0%+30.1%0.010%
10/21/2025 Silver Oak Securities Incorporated1,955$288K0.0%N/A0.004%
10/16/2025 180 Wealth Advisors LLC2,620$387K0.0%-3.5%0.005%
10/16/2025 Lockerman Financial Group Inc.11,800$1.74M2.2%-9.9%0.022%
10/15/2025 Pacer Advisors Inc.6,080$897K0.0%N/A0.011%
10/15/2025 Harbor Capital Advisors Inc.9,932$1.47M0.1%-62.4%0.018%
10/15/2025 Swedbank AB67,500$9.96M0.0%-8.5%0.124%
10/14/2025 Yousif Capital Management LLC14,884$2.20M0.0%-4.8%0.027%
10/14/2025 Farther Finance Advisors LLC1,074$158K0.0%+423.9%0.002%
10/14/2025 Exchange Traded Concepts LLC4,329$639K0.0%+29.7%0.008%
10/10/2025 Perpetual Ltd10,648$1.57M0.0%-49.7%0.020%
10/9/2025 Voya Investment Management LLC4,876$719K0.0%-75.1%0.009%
10/7/2025 Assenagon Asset Management S.A.2,457$363K0.0%-18.8%0.005%
10/2/2025 GAMMA Investing LLC504$74K0.0%-28.8%0.001%
9/26/2025Corient Private Wealth LLC330,414$55.58M0.1%-5.1%0.608%
9/24/2025Texas Permanent School Fund Corp34,437$5.79M0.1%-33.6%0.063%
9/4/2025Osaic Holdings Inc.813$137K0.0%-14.8%0.001%
8/27/2025Orion Porfolio Solutions LLC4,871$819K0.0%+2.2%0.009%
8/26/2025Thrivent Financial for Lutherans10,596$1.78M0.0%+1.7%0.020%
8/19/2025Liontrust Investment Partners LLP708,300$119.15M1.7%-5.2%1.304%
8/19/2025Pitcairn Co.1,320$222K0.0%-18.8%0.002%
8/15/2025CANADA LIFE ASSURANCE Co26,120$4.39M0.0%-1.8%0.048%
8/15/2025Tower Research Capital LLC TRC 1,516$255K0.0%+12.3%0.003%
8/15/2025Corient Private Wealth LLC330,414$55.58M0.1%-5.1%0.608%
8/15/2025Vident Advisory LLC1,749$294K0.0%-37.5%0.003%
8/15/2025Tidal Investments LLC106,198$17.87M0.1%-3.9%0.195%
8/15/2025Smartleaf Asset Management LLC170$29K0.0%-34.1%0.000%
8/15/2025Onex Canada Asset Management Inc.8,224$1.38M0.2%-52.9%0.015%
8/15/2025Orion Porfolio Solutions LLC4,871$819K0.0%+2.2%0.009%
8/15/2025Holocene Advisors LP1,243,607$209.20M0.5%-6.7%2.289%
8/15/2025Engineers Gate Manager LP6,873$1.16M0.0%-11.4%0.013%
8/15/2025BNP Paribas Financial Markets4,483$754K0.0%-93.7%0.008%
8/15/2025Brevan Howard Capital Management LP3,486$586K0.0%-78.2%0.006%
8/15/2025Bellevue Group AG89,673$15.09M0.3%+28.5%0.165%
8/15/2025Birchview Capital LP8,280$1.39M1.4%-26.6%0.015%
8/15/2025Bamco Inc. NY384,589$64.70M0.2%+21.2%0.708%
8/15/2025Bank of America Corp DE190,176$31.99M0.0%-39.9%0.350%
8/15/20254D Advisors LLC45,000$7.57M4.1%+50.0%0.083%
8/15/2025AQR Capital Management LLC50,256$8.45M0.0%+517.2%0.093%
8/15/2025Ameriprise Financial Inc.394,487$66.36M0.0%+86.3%0.726%
8/14/2025Alamea Verwaltungs GmbH2,566$432K0.3%+30.7%0.005%
8/14/2025Viking Global Investors LP767,426$129.10M0.4%N/A1.413%
8/14/2025Durable Capital Partners LP1,163,898$195.79M1.5%+3.4%2.142%
8/14/2025California State Teachers Retirement System43,353$7.29M0.0%+0.2%0.080%
8/14/2025Raymond James Financial Inc.200,229$33.68M0.0%-2.9%0.369%
8/14/2025Occudo Quantitative Strategies LP2,115$356K0.0%N/A0.004%
8/14/2025Quantinno Capital Management LP120,383$20.25M0.1%+88.9%0.222%
8/14/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.11,062$1.86M0.0%-2.7%0.020%
8/14/2025Alliancebernstein L.P.844,067$141.99M0.0%-2.5%1.554%
8/14/2025Treasurer of the State of North Carolina21,053$3.54M0.0%+6.0%0.039%
8/14/2025The Manufacturers Life Insurance Company 58,714$9.88M0.0%+8.9%0.108%
8/14/2025Squarepoint Ops LLC74,027$12.45M0.0%+344.1%0.136%
8/14/2025Sei Investments Co.30,506$5.13M0.0%-0.8%0.056%
8/14/2025State Street Corp1,486,394$250.04M0.0%+0.7%2.736%
8/14/2025WINTON GROUP Ltd5,617$945K0.0%N/A0.010%
8/14/2025Natixis45,648$7.68M0.0%N/A0.084%
8/14/2025Bank of Nova Scotia53,108$8.93M0.0%-43.0%0.098%
8/14/2025California Public Employees Retirement System72,807$12.25M0.0%+4.2%0.134%
8/14/2025Federated Hermes Inc.4,201$707K0.0%-91.8%0.008%
8/13/2025Gabelli Funds LLC32,700$5.50M0.0%-0.9%0.060%
8/13/2025Tema Etfs LLC3,949$664K0.2%-13.1%0.007%
8/13/2025Knollwood Investment Advisory LLC1,200$202K0.0%N/A0.002%
8/13/2025Amundi41,583$7.13M0.0%+1.0%0.077%
8/13/2025Marshall Wace LLP7,208$1.21M0.0%-34.3%0.013%
8/13/2025Alpha Wave Global LP102,068$17.17M1.9%N/A0.188%
8/13/2025Walleye Capital LLC43,232$7.27M0.0%-43.2%0.080%
8/13/2025Baird Financial Group Inc.40,720$6.85M0.0%-9.8%0.075%
8/13/2025First Trust Advisors LP99,612$16.76M0.0%-31.4%0.183%
8/13/2025Guggenheim Capital LLC5,673$954K0.0%-10.7%0.010%
8/13/2025Invesco Ltd.237,303$39.92M0.0%-9.2%0.437%
8/13/2025Quantbot Technologies LP509$86K0.0%N/A0.001%
8/13/2025M&T Bank Corp2,759$464K0.0%+26.3%0.005%
8/13/2025BLI Banque de Luxembourg Investments86,700$14.58M0.4%-14.3%0.160%
8/13/2025Schroder Investment Management Group448,501$75.45M0.1%+3.0%0.826%
8/13/2025Norges Bank39,053$6.57M0.0%N/A0.072%
8/13/2025Grantham Mayo Van Otterloo & Co. LLC240,563$40.47M0.1%N/A0.443%
8/13/2025State Board of Administration of Florida Retirement System43,319$7.29M0.0%+1.3%0.080%
8/13/2025Quadrant Capital Group LLC4,981$838K0.0%+23.0%0.009%
8/13/2025Choreo LLC1,835$309K0.0%+28.1%0.003%
8/13/2025Russell Investments Group Ltd.10,935$1.84M0.0%-68.5%0.020%
8/12/2025Advisors Asset Management Inc.24,383$4.10M0.1%-10.6%0.045%
8/12/2025XTX Topco Ltd10,837$1.82M0.1%N/A0.020%
8/12/2025Prudential Financial Inc.3,872$651K0.0%+21.4%0.007%
8/12/2025American Century Companies Inc.152,228$25.61M0.0%+92.3%0.280%
8/12/2025Rhumbline Advisers127,496$21.45M0.0%+3.8%0.235%
8/12/2025Franklin Resources Inc.4,902$825K0.0%-60.1%0.009%
8/12/2025Legal & General Group Plc104,364$17.56M0.0%+4.8%0.192%
8/12/2025MAI Capital Management202$34K0.0%+176.7%0.000%
8/12/2025JPMorgan Chase & Co.138,090$23.23M0.0%-44.0%0.254%
8/12/2025Entropy Technologies LP8,000$1.35M0.1%+343.7%0.015%
8/12/2025Swiss National Bank87,700$14.75M0.0%-0.6%0.161%
8/12/2025Handelsbanken Fonder AB12,330$2.07M0.0%-4.6%0.023%
8/12/2025Westfield Capital Management Co. LP1,181,203$198.70M0.8%+75.9%2.174%
8/12/2025Ensign Peak Advisors Inc15,976$2.69M0.0%+5.6%0.029%
8/11/2025Bridger Management LLC33,641$5.66M3.3%-14.4%0.062%
(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, 400 institutional investors and hedge funds held shares of Masimo. The most heavily invested institutionals were FMR LLC ($1.34B), Vanguard Group Inc. ($763.57M), Massachusetts Financial Services Co. MA ($415.57M), Capital Research Global Investors ($405.81M), T. Rowe Price Investment Management Inc. ($278.76M), State Street Corp ($250.04M), and Holocene Advisors LP ($209.20M).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 319 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: Massachusetts Financial Services Co. MA ($3.36M), FMR LLC ($3.31M), Capital Research Global Investors ($1.23M), Durable Capital Partners LP ($1.16M), Eminence Capital LP ($1.04M), Westfield Capital Management Co. LP ($986.89K), and Alliancebernstein L.P. ($878.59K).

How much institutional buying is happening at Masimo?

Institutional investors have bought a total of 16,361,416 shares in the last 24 months. This purchase volume represents approximately $2.62B in transactions.

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

Of the 167 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: Thrivent Financial for Lutherans ($1.21M), Ace Management Global Ltd. ($1.01M), Farallon Capital Management LLC ($861.56K), RTW Investments LP ($779.11K), JPMorgan Chase & Co. ($409.91K), 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 8,219,162 shares in the last 24 months. This volume of shares sold represents approximately $1.31B in transactions.


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This page (NASDAQ:MASI) was last updated on 10/26/2025 by MarketBeat.com Staff
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