MasimoMASI
13F holders, Q3 2024 (September 30)362holders +10
59new positions
48sold out
9famous investors
$133.21avg. 13F price*
At the end of Q3 2024, 362 institutions reported holding Masimo Corp. (MASI) in their 13F filings, up 10 from Q2 2024. 59 opened new positions and 48 sold out. The largest holders were BlackRock, Inc. ($1.2B), FMR LLC ($900.9M) and Politan Capital Management LP ($628.6M). 9 famous investors held it, including Joel Greenblatt (0.2% of Gotham Asset Management's portfolio), Ron Baron (0.1% of Baron Capital (BAMCO)'s portfolio) and Mario Gabelli (0.1% of GAMCO Investors's portfolio).
- Company
- Masimo Corp.
- CUSIP
- 574795100
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2024 → Q3 2024
| Institutions | Total Value | |
|---|---|---|
| New Positions | 59 | $101.0M |
| Exits | 48 | $211.6M |
All 13F filers, Q2 2024 → Q3 2024: 6,495,864 shares bought and 5,084,969 shares sold, net +1,410,895 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 362 holders
| BlackRock, Inc. | 0.02% | — | 8,822,269 | $1.2B |
| FMR LLC | 0.05% | Add +41.2% | 6,756,618 | $900.9M |
| Politan Capital Management LP | 35.50% | No change | 4,714,746 | $628.6M |
| Vanguard Group Inc. | 0.01% | Reduce -4.6% | 4,520,487 | $602.7M |
| T. Rowe Price Investment Management, Inc. | 0.12% | Add +32.2% | 1,526,488 | $203.5M |
| RTW Investments, LP | 2.82% | No change | 1,462,400 | $195.0M |
| State Street Corp. | 0.01% | Add +0.7% | 1,438,814 | $191.8M |
| Westfield Capital Management Co. LP | 0.84% | Add +23.2% | 1,394,056 | $185.9M |
| Capital Research Global Investors | 0.04% | Add +28.7% | 1,360,328 | $181.4M |
| Farallon Capital Management, L.L.C. | 0.93% | Add +12.4% | 1,258,563 | $167.8M |
| Ace Management Global Ltd. | 38.42% | Reduce -9.0% | 965,504 | $128.7M |
| Holocene Advisors, LP | 0.47% | Reduce -15.6% | 875,159 | $116.7M |
| Geode Capital Management, LLC | 0.01% | Add +1.5% | 792,886 | $105.7M |
| Massachusetts Financial Services Co. | 0.03% | Add +9.8% | 792,166 | $105.6M |
| Liontrust Investment Partners LLP | 1.45% | No change | 808,693 | $101.8M |
| Alyeska Investment Group, L.P. | 0.51% | Add +72.9% | 745,127 | $99.3M |
| Morgan Stanley | 0.01% | Add +54.9% | 736,856 | $98.2M |
| Schroder Investment Management Group | 0.10% | Add +38.6% | 732,621 | $97.6M |
| Dimensional Fund Advisors LP | 0.02% | Add +13.7% | 597,698 | $79.7M |
| Man Group plc | 0.16% | Add +37.1% | 399,945 | $53.3M |
| Sumitomo Mitsui Trust Group, Inc. | 0.03% | Reduce -4.8% | 372,183 | $49.6M |
| Charles Schwab Investment Management Inc. | 0.01% | Reduce -5.9% | 370,028 | $49.3M |
| Baron Capital (BAMCO) | 0.12% | No change | 347,200 | $46.3M |
| Two Sigma Investments, LP | 0.11% | Add +36.6% | 342,827 | $45.7M |
| Bank of New York Mellon Corp | 0.01% | Reduce -12.3% | 341,960 | $45.6M |
| Ensemble Capital Management, LLC | 3.85% | Reduce -16.4% | 340,355 | $45.4M |
| Goldman Sachs Group Inc. | 0.01% | Add +145.8% | 332,076 | $44.3M |
| Northern Trust Corp. | 0.01% | Reduce -5.1% | 301,041 | $40.1M |
| Norges Bank | 0.00% | Add +424.5% | 255,388 | $34.1M |
| Comerica Bank | 0.13% | Add +28.5% | 245,081 | $32.7M |
| ING Groep NV | 0.19% | Add +143.3% | 240,900 | $32.1M |
| Two Sigma Advisers, LP | 0.07% | Add +95.9% | 218,600 | $29.1M |
| Ameriprise Financial Inc. | 0.01% | Add +117.7% | 199,861 | $26.6M |
| Citadel Advisors | 0.03% | Reduce -16.7% | 189,549 | $25.3M |
| Cramer Rosenthal McGlynn LLC | 1.37% | Add +923.3% | 185,017 | $24.7M |
| Raymond James & Associates | 0.01% | Reduce -3.0% | 175,050 | $23.3M |
| Clearline Capital LP | 1.89% | New | 160,029 | $21.3M |
| JPMorgan Chase & Co. | 0.00% | Add +5.2% | 155,853 | $20.8M |
| Gotham Asset Management | 0.21% | Add +90.0% | 153,486 | $20.5M |
| Rockefeller Capital Management L.P. | 0.05% | Add +4.2% | 137,393 | $18.3M |
| National Bank of Canada | 0.02% | Add +195.6% | 132,500 | $17.7M |
| Rhumbline Advisers | 0.02% | Reduce -0.6% | 127,014 | $16.9M |
| Federated Hermes, Inc. | 0.03% | Reduce -11.7% | 118,615 | $15.8M |
| Bank of America Corp. | 0.00% | Add +2.5% | 117,845 | $15.7M |
| Retirement Systems of Alabama | 0.06% | Reduce -20.8% | 114,260 | $15.2M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -6.9% | 112,471 | $15.0M |
| FIL Ltd | 0.01% | Add +38.8% | 105,708 | $14.1M |
| Canada Pension Plan Investment Board | 0.01% | New | 104,300 | $13.9M |
| Principal Financial Group Inc. | 0.01% | Reduce -31.0% | 102,507 | $13.7M |
| Twin Tree Management, LP | 0.29% | New | 94,416 | $12.6M |
| Legal & General Group Plc | 0.00% | Add +1.0% | 94,065 | $12.5M |
| Swiss National Bank | 0.01% | Reduce -0.2% | 88,300 | $11.8M |
| Invesco Ltd. | 0.00% | Add +2.5% | 85,158 | $11.4M |
| GAMCO Investors | 0.12% | No change | 84,500 | $11.3M |
| Nuveen Asset Management, LLC | 0.00% | Reduce -27.6% | 83,727 | $11.2M |
| California Public Employees Retirement System | 0.01% | Reduce -1.9% | 73,313 | $9.8M |
| T. Rowe Price Associates Inc. | 0.00% | Add +2.1% | 69,716 | $9.3M |
| Alliancebernstein L.P. | 0.00% | Add +11.1% | 68,804 | $9.2M |
| Citigroup Inc. | 0.01% | Add +38.8% | 62,088 | $8.3M |
| Montanaro Asset Management Ltd | 1.32% | Add +3.7% | 55,700 | $7.4M |
| Erste Asset Management GmbH | 0.09% | Reduce -35.3% | 55,000 | $7.3M |
| UBS Group AG | 0.00% | Add +24.7% | 54,682 | $7.3M |
| Capital Fund Management S.A. | 0.08% | Add +128.2% | 53,726 | $7.2M |
| Squarepoint Ops LLC | 0.02% | Add +449.5% | 53,226 | $7.1M |
| Corebridge Financial, Inc. | 0.04% | Reduce -7.4% | 52,466 | $7.0M |
| Wells Fargo & Company | 0.00% | Add +3.3% | 51,598 | $6.9M |
| Logan Capital Management Inc. | 0.28% | Reduce -1.4% | 50,352 | $6.7M |
| Wilmington Savings Fund Society, FSB | 0.12% | Reduce -0.5% | 49,064 | $6.5M |
| HRT Financial LP | 0.03% | Add +105.5% | 48,009 | $6.4M |
| Nomura Holdings Inc. | 0.05% | New | 47,584 | $6.3M |
| TD Asset Management Inc | 0.01% | Add +36.8% | 46,308 | $6.2M |
| New York State Teachers Retirement System | 0.01% | Reduce -7.3% | 45,448 | $6.1M |
| Walleye Capital LLC | 0.07% | Add +5947.8% | 44,875 | $6.0M |
| NS Partners Ltd | 0.24% | Add +2.3% | 43,037 | $5.7M |
| State Board of Administration of Florida Retirement System | 0.01% | No change | 42,901 | $5.7M |
| California State Teachers Retirement System | 0.01% | Reduce -2.6% | 42,612 | $5.7M |
| Sterling Capital Management LLC | 0.07% | — | 40,939 | $5.5M |
| Barclays PLC | 0.00% | Add +152.6% | 39,957 | $5.3M |
| PEAK6 Investments LLC | 0.26% | Add +22.2% | 39,515 | $5.3M |
| CANADA LIFE ASSURANCE Co | 0.01% | Add +37.0% | 37,560 | $5.0M |
| Manufacturers Life Insurance Company, The | 0.00% | Reduce -3.2% | 36,526 | $4.9M |
| Bank of Nova Scotia | 0.01% | New | 35,438 | $4.7M |
| Roubaix Capital, LLC | 2.50% | Add +37.0% | 34,041 | $4.5M |
| Susquehanna Portfolio Strategies, LLC | 0.31% | Reduce -52.6% | 33,995 | $4.5M |
| Gabelli Funds LLC | 0.03% | No change | 33,000 | $4.4M |
| Healthcare of Ontario Pension Plan Trust Fund | 0.01% | New | 30,900 | $4.1M |
| South Dakota Investment Council | 0.08% | No change | 30,611 | $4.1M |
| Millennium Management | 0.00% | Reduce -96.1% | 29,253 | $3.9M |
| SG Americas Securities, LLC | 0.01% | New | 28,967 | $3.9M |
| Sei Investments Co. | 0.00% | Add +19.0% | 28,082 | $3.7M |
| Zacks Investment Management | 0.03% | Reduce -1.1% | 26,558 | $3.5M |
| Envestnet Asset Management Inc. | 0.00% | Add +18.9% | 26,528 | $3.5M |
| New York State Common Retirement Fund | 0.00% | Reduce -30.7% | 26,163 | $3.5M |
| Westmount Partners, LLC | 1.04% | No change | 25,991 | $3.5M |
| Amundi | 0.00% | New | 24,035 | $3.4M |
| State of Wisconsin Investment Board | 0.01% | Add +36.2% | 25,141 | $3.4M |
| Troluce Capital Advisors LLC | 0.60% | New | 25,000 | $3.3M |
| Jane Street Group, LLC | 0.01% | Reduce -16.6% | 24,680 | $3.3M |
| D. E. Shaw & Co. | 0.00% | New | 24,358 | $3.2M |
| Mutual of America Capital Management LLC | 0.03% | Reduce -6.5% | 23,865 | $3.2M |
"% of holder's portfolio" is MASI's weight in each manager's 13F, not the share of Masimo Corp. the manager owns.