MasimoMASI
13F holders, Q1 2025 (March 31)394holders +29
70new positions
45sold out
9famous investors
$166.56avg. 13F price*
At the end of Q1 2025, 394 institutions reported holding Masimo Corp. (MASI) in their 13F filings, up 29 from Q4 2024. 70 opened new positions and 45 sold out. The largest holders were BlackRock, Inc. ($1.6B), FMR LLC ($1.4B) and Politan Capital Management LP ($785.5M). 9 famous investors held it, including Joel Greenblatt (0.2% of Gotham Asset Management's portfolio), Ron Baron (0.2% of Baron Capital (BAMCO)'s portfolio) and Mario Gabelli (0.2% of GAMCO Investors's portfolio).
- Company
- Masimo Corp.
- CUSIP
- 574795100
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2024 → Q1 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 70 | $338.7M |
| Exits | 45 | $127.4M |
All 13F filers, Q4 2024 → Q1 2025: 5,751,191 shares bought and 2,974,582 shares sold, net +2,776,609 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 394 holders
| BlackRock, Inc. | 0.03% | Add +13.5% | 9,871,428 | $1.6B |
| FMR LLC | 0.09% | Add +1.0% | 8,178,763 | $1.4B |
| Politan Capital Management LP | 53.37% | No change | 4,714,746 | $785.5M |
| Vanguard Group Inc. | 0.01% | Reduce -0.1% | 4,583,276 | $763.6M |
| Capital Research Global Investors | 0.07% | Reduce -16.3% | 2,056,095 | $342.5M |
| Massachusetts Financial Services Co. | 0.11% | Add +13.4% | 1,967,838 | $327.8M |
| T. Rowe Price Investment Management, Inc. | 0.18% | Add +0.7% | 1,673,252 | $278.8M |
| State Street Corp. | 0.01% | Add +0.9% | 1,475,991 | $245.9M |
| Holocene Advisors, LP | 0.66% | Add +59.5% | 1,333,296 | $222.1M |
| Durable Capital Partners LP | 1.68% | New | 1,125,619 | $187.5M |
| Alliancebernstein L.P. | 0.05% | Reduce -8.6% | 865,870 | $144.3M |
| Geode Capital Management, LLC | 0.01% | Add +5.4% | 844,318 | $140.7M |
| Liontrust Investment Partners LLP | 1.94% | Reduce -5.7% | 747,498 | $124.5M |
| Morgan Stanley | 0.01% | Reduce -0.3% | 735,782 | $122.6M |
| Alyeska Investment Group, L.P. | 0.48% | Add +24.9% | 722,534 | $120.4M |
| Dimensional Fund Advisors LP | 0.03% | Add +8.6% | 703,378 | $117.2M |
| RTW Investments, LP | 1.74% | No change | 683,294 | $113.8M |
| Westfield Capital Management Co. LP | 0.54% | Reduce -12.7% | 671,479 | $111.9M |
| Schroder Investment Management Group | 0.07% | Reduce -23.1% | 435,548 | $71.2M |
| Northern Trust Corp. | 0.01% | Reduce -0.1% | 383,356 | $63.9M |
| Charles Schwab Investment Management Inc. | 0.01% | Reduce -0.2% | 377,070 | $62.8M |
| Sumitomo Mitsui Trust Group, Inc. | 0.04% | Reduce -0.2% | 372,978 | $62.1M |
| Corient Private Wealth LP | 0.09% | Add +0.1% | 348,038 | $58.0M |
| Bank of New York Mellon Corp | 0.01% | Reduce -1.5% | 332,108 | $55.3M |
| Baron Capital (BAMCO) | 0.16% | Add +3.3% | 317,282 | $52.9M |
| Bank of America Corp. | 0.00% | Add +195.1% | 316,643 | $52.8M |
| Point72 Asset Management | 0.15% | Add +26.9% | 315,422 | $52.5M |
| Artisan Partners Limited Partnership | 0.08% | New | 299,023 | $49.8M |
| T. Rowe Price Associates Inc. | 0.01% | Add +12.7% | 282,637 | $47.1M |
| Goldman Sachs Group Inc. | 0.01% | Add +38.6% | 280,255 | $46.7M |
| Invesco Ltd. | 0.01% | Reduce -6.0% | 261,358 | $43.5M |
| JPMorgan Chase & Co. | 0.00% | Add +91.6% | 246,489 | $41.1M |
| Ameriprise Financial Inc. | 0.01% | Reduce -1.9% | 211,786 | $35.3M |
| Raymond James Financial Inc. | 0.01% | Add +1.1% | 206,116 | $34.3M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.01% | Reduce -0.6% | 189,130 | $31.5M |
| UBS Group AG | 0.01% | Add +6.3% | 170,177 | $28.4M |
| FIL Ltd | 0.03% | Add +53.9% | 169,788 | $28.3M |
| Nuveen, LLC | 0.01% | — | 155,045 | $25.8M |
| Cramer Rosenthal McGlynn LLC | 1.82% | Reduce -31.9% | 151,664 | $25.3M |
| First Trust Advisors LP | 0.02% | Add +206.7% | 145,164 | $24.2M |
| Gotham Asset Management | 0.20% | Add +13.2% | 144,590 | $24.1M |
| Verition Fund Management LLC | 0.14% | Add +1821.7% | 143,759 | $24.0M |
| Comerica Bank | 0.10% | Reduce -2.5% | 137,855 | $23.0M |
| Millennium Management | 0.02% | Reduce -67.0% | 134,806 | $22.5M |
| Woodline Partners LP | 0.14% | Add +159.8% | 132,969 | $22.2M |
| Rhumbline Advisers | 0.02% | Reduce -1.3% | 122,811 | $20.5M |
| Rockefeller Capital Management L.P. | 0.05% | Add +29.1% | 117,326 | $19.5M |
| Tidal Investments LLC | 0.16% | Add +27.4% | 110,486 | $18.4M |
| Principal Financial Group Inc. | 0.01% | Add +0.0% | 102,661 | $17.1M |
| Legal & General Group Plc | 0.00% | Add +2.4% | 99,542 | $16.6M |
| BLI - Banque de Luxembourg Investments | 0.50% | No change | 101,200 | $16.5M |
| Bank of Nova Scotia | 0.04% | New | 93,203 | $15.5M |
| Great Lakes Advisors, LLC | 0.14% | Reduce -3.0% | 92,872 | $15.5M |
| Erste Asset Management GmbH | 0.20% | Add +11.3% | 92,000 | $15.3M |
| TD Asset Management Inc | 0.01% | Add +4.8% | 88,668 | $14.8M |
| Swiss National Bank | 0.01% | Reduce -1.3% | 88,200 | $14.7M |
| GAMCO Investors | 0.16% | No change | 84,500 | $14.1M |
| American Century Companies Inc. | 0.01% | Add +525.5% | 79,176 | $13.2M |
| Walleye Capital LLC | 0.16% | Add +39.0% | 76,370 | $12.7M |
| Swedbank AB | 0.02% | New | 75,900 | $12.6M |
| Neuberger Berman Group LLC | 0.01% | Reduce -45.7% | 74,962 | $12.5M |
| BNP Paribas Financial Markets | 0.01% | Add +907.5% | 70,723 | $11.8M |
| California Public Employees Retirement System | 0.01% | Reduce -0.5% | 69,875 | $11.6M |
| Bellevue Group AG | 0.26% | Add +188.9% | 69,808 | $11.6M |
| Quantinno Capital Management LP | 0.07% | Add +1497.5% | 63,739 | $10.6M |
| ExodusPoint Capital Management, LP | 0.13% | Add +135.2% | 59,792 | $10.0M |
| Retirement Systems of Alabama | 0.04% | Add +0.1% | 54,087 | $9.0M |
| Manufacturers Life Insurance Company, The | 0.01% | Add +4.8% | 53,900 | $9.0M |
| Citigroup Inc. | 0.01% | Reduce -43.1% | 52,158 | $8.7M |
| Federated Hermes, Inc. | 0.02% | Reduce -3.3% | 51,002 | $8.5M |
| Citadel Advisors | 0.01% | Reduce -88.8% | 49,482 | $8.2M |
| Sei Investments Co. | 0.01% | Add +85.6% | 49,365 | $8.2M |
| Corebridge Financial, Inc. | 0.05% | Reduce -2.4% | 49,327 | $8.2M |
| Baird Financial Group, Inc. | 0.01% | Add +31.9% | 45,120 | $7.5M |
| Integral Health Asset Management, LLC | 0.83% | New | 45,000 | $7.5M |
| Picton Mahoney Asset Management | 0.25% | Add +3.6% | 44,152 | $7.4M |
| Royal Bank of Canada | 0.00% | Add +44.5% | 43,884 | $7.3M |
| NS Partners Ltd | 0.32% | Add +2.1% | 43,555 | $7.3M |
| California State Teachers Retirement System | 0.01% | Add +2.0% | 43,252 | $7.2M |
| State Board of Administration of Florida Retirement System | 0.01% | Reduce -0.2% | 42,771 | $7.1M |
| Logan Capital Management Inc. | 0.32% | Reduce -11.3% | 42,395 | $7.1M |
| Point72 (DIFC) Ltd | 0.67% | Reduce -28.7% | 41,639 | $6.9M |
| STRS Ohio | 0.03% | Add +160.6% | 40,135 | $6.7M |
| New York State Teachers Retirement System | 0.02% | Reduce -11.5% | 40,048 | $6.7M |
| Barclays PLC | 0.00% | Reduce -25.1% | 39,853 | $6.6M |
| Norges Bank | 0.00% | Add +18.0% | 39,414 | $6.6M |
| Bridger Management, LLC | 3.26% | New | 39,300 | $6.5M |
| Allspring Global Investments Holdings, LLC | 0.01% | Reduce -21.4% | 38,302 | $6.4M |
| Amundi | 0.00% | Reduce -63.1% | 41,167 | $6.3M |
| Russell Investments Group, Ltd. | 0.01% | Add +76.3% | 34,747 | $5.8M |
| Gabelli Funds LLC | 0.04% | No change | 33,000 | $5.5M |
| Intech Investment Management LLC | 0.06% | Add +26.8% | 32,494 | $5.4M |
| Montanaro Asset Management Ltd | 1.58% | Reduce -30.5% | 32,300 | $5.4M |
| Envestnet Asset Management Inc. | 0.00% | Add +2.2% | 31,788 | $5.3M |
| Lisanti Capital Growth, LLC | 1.51% | New | 30,485 | $5.1M |
| Perpetual Ltd | 0.06% | New | 30,209 | $5.0M |
| 4D Advisors, LLC | 3.88% | New | 30,000 | $5.0M |
| Zacks Investment Management | 0.04% | Add +2.1% | 27,807 | $4.6M |
| Advisors Asset Management, Inc. | 0.09% | Add +18.8% | 27,288 | $4.5M |
| CANADA LIFE ASSURANCE Co | 0.01% | Reduce -29.1% | 26,612 | $4.4M |
"% of holder's portfolio" is MASI's weight in each manager's 13F, not the share of Masimo Corp. the manager owns.