MasimoMASI
13F holders, Q2 2025 (June 30)378holders −16
41new positions
57sold out
11famous investors
$168.22avg. 13F price*
At the end of Q2 2025, 378 institutions reported holding Masimo Corp. (MASI) in their 13F filings, down 16 from Q1 2025. 41 opened new positions and 57 sold out. The largest holders were BlackRock, Inc. ($1.8B), FMR LLC ($1.4B) and Politan Capital Management LP ($793.4M). 11 famous investors held it, including Andreas Halvorsen (0.4% of Viking Global Investors's portfolio), Ron Baron (0.2% of Baron Capital (BAMCO)'s portfolio) and Joel Greenblatt (0.2% of Gotham Asset Management's portfolio).
- Company
- Masimo Corp.
- CUSIP
- 574795100
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2025 → Q2 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 41 | $273.7M |
| Exits | 57 | $112.9M |
All 13F filers, Q1 2025 → Q2 2025: 6,133,910 shares bought and 2,865,369 shares sold, net +3,268,541 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 378 holders
| BlackRock, Inc. | 0.03% | Add +6.4% | 10,507,326 | $1.8B |
| FMR LLC | 0.08% | Add +0.0% | 8,181,372 | $1.4B |
| Politan Capital Management LP | 56.98% | Add +0.0% | 4,716,536 | $793.4M |
| Vanguard Group Inc. | 0.01% | Add +1.2% | 4,638,135 | $780.2M |
| T. Rowe Price Investment Management, Inc. | 0.27% | Add +49.4% | 2,500,144 | $420.6M |
| Massachusetts Financial Services Co. | 0.13% | Add +25.5% | 2,470,393 | $415.6M |
| Capital Research Global Investors | 0.06% | Reduce -9.8% | 1,855,670 | $312.2M |
| State Street Corp. | 0.01% | Add +0.7% | 1,486,394 | $250.0M |
| Holocene Advisors, LP | 0.52% | Reduce -6.7% | 1,243,607 | $209.2M |
| Westfield Capital Management Co. LP | 0.83% | Add +75.9% | 1,181,203 | $198.7M |
| Durable Capital Partners LP | 1.48% | Add +3.4% | 1,163,898 | $195.8M |
| Alyeska Investment Group, L.P. | 0.68% | Add +57.0% | 1,134,490 | $190.8M |
| Geode Capital Management, LLC | 0.01% | Add +6.2% | 896,418 | $150.8M |
| Alliancebernstein L.P. | 0.05% | Reduce -2.5% | 844,067 | $142.0M |
| Viking Global Investors | 0.37% | New | 767,426 | $129.1M |
| Morgan Stanley | 0.01% | Add +4.3% | 767,375 | $129.1M |
| Liontrust Investment Partners LLP | 1.71% | Reduce -5.2% | 708,300 | $119.2M |
| RTW Investments, LP | 1.64% | No change | 683,294 | $114.9M |
| Dimensional Fund Advisors LP | 0.02% | Reduce -25.6% | 523,226 | $88.0M |
| Goldman Sachs Group Inc. | 0.01% | Add +68.3% | 471,525 | $79.3M |
| Sumitomo Mitsui Trust Group, Inc. | 0.05% | Add +26.3% | 471,041 | $79.2M |
| Schroder Investment Management Group | 0.06% | Add +3.0% | 448,501 | $75.4M |
| T. Rowe Price Associates Inc. | 0.01% | Add +43.5% | 405,460 | $68.2M |
| Ameriprise Financial Inc. | 0.02% | Add +86.3% | 394,487 | $66.4M |
| Northern Trust Corp. | 0.01% | Add +1.4% | 388,542 | $65.4M |
| Baron Capital (BAMCO) | 0.18% | Add +21.2% | 384,589 | $64.7M |
| Charles Schwab Investment Management Inc. | 0.01% | Reduce -1.7% | 370,734 | $62.4M |
| Corient Private Wealth LP | 0.07% | Reduce -5.1% | 330,414 | $55.6M |
| Bank of New York Mellon Corp | 0.01% | Reduce -4.4% | 317,593 | $53.4M |
| GMO | 0.12% | New | 240,563 | $40.5M |
| Invesco Ltd. | 0.01% | Reduce -9.2% | 237,303 | $39.9M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.01% | Add +10.8% | 209,563 | $35.3M |
| Raymond James Financial Inc. | 0.01% | Reduce -2.9% | 200,229 | $33.7M |
| Bank of America Corp. | 0.00% | Reduce -39.9% | 190,176 | $32.0M |
| Comerica Bank | 0.12% | Add +37.7% | 189,822 | $31.9M |
| Woodline Partners LP | 0.16% | Add +37.4% | 182,709 | $30.7M |
| TD Asset Management Inc | 0.02% | Add +88.5% | 167,176 | $28.1M |
| Gotham Asset Management | 0.17% | Add +14.4% | 165,356 | $27.8M |
| American Century Companies Inc. | 0.01% | Add +92.3% | 152,228 | $25.6M |
| Nuveen, LLC | 0.01% | Reduce -3.5% | 149,658 | $25.2M |
| Hawk Ridge Capital Management LP | 1.04% | New | 148,685 | $25.0M |
| UBS Group AG | 0.01% | Reduce -16.5% | 142,164 | $23.9M |
| JPMorgan Chase & Co. | 0.00% | Reduce -44.0% | 138,090 | $23.2M |
| Rhumbline Advisers | 0.02% | Add +3.8% | 127,496 | $21.4M |
| Quantinno Capital Management LP | 0.09% | Add +88.9% | 120,383 | $20.3M |
| Rockefeller Capital Management L.P. | 0.04% | Reduce -1.4% | 115,626 | $19.5M |
| Royal Bank of Canada | 0.00% | Add +149.9% | 109,690 | $18.5M |
| Tidal Investments LLC | 0.12% | Reduce -3.9% | 106,198 | $17.9M |
| Legal & General Group Plc | 0.00% | Add +4.8% | 104,364 | $17.6M |
| Principal Financial Group Inc. | 0.01% | Reduce -0.2% | 102,467 | $17.2M |
| Alpha Wave Global, LP | 1.85% | New | 102,068 | $17.2M |
| First Trust Advisors LP | 0.01% | Reduce -31.4% | 99,612 | $16.8M |
| Cramer Rosenthal McGlynn LLC | 1.10% | Reduce -37.4% | 94,939 | $16.0M |
| PFM Health Sciences, LP | 1.41% | New | 94,451 | $15.9M |
| Erste Asset Management GmbH | 0.13% | No change | 92,000 | $15.5M |
| Bellevue Group AG | 0.33% | Add +28.5% | 89,673 | $15.1M |
| Swiss National Bank | 0.01% | Reduce -0.6% | 87,700 | $14.8M |
| BLI - Banque de Luxembourg Investments | 0.42% | Reduce -14.3% | 86,700 | $14.6M |
| GAMCO Investors | 0.14% | No change | 84,500 | $14.2M |
| Great Lakes Advisors, LLC | 0.12% | Reduce -11.3% | 82,348 | $13.9M |
| Squarepoint Ops LLC | 0.03% | Add +344.1% | 74,027 | $12.5M |
| Swedbank AB | 0.01% | Reduce -2.8% | 73,800 | $12.4M |
| California Public Employees Retirement System | 0.01% | Add +4.2% | 72,807 | $12.2M |
| Point72 (DIFC) Ltd | 0.92% | Add +65.0% | 68,700 | $11.6M |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 0.03% | New | 65,821 | $11.1M |
| Manufacturers Life Insurance Company, The | 0.01% | Add +8.9% | 58,714 | $9.9M |
| FIL Ltd | 0.01% | Reduce -66.8% | 56,326 | $9.5M |
| Barclays PLC | 0.00% | Add +40.8% | 56,114 | $9.4M |
| STRS Ohio | 0.04% | Add +39.5% | 55,983 | $9.4M |
| Retirement Systems of Alabama | 0.03% | Add +1.7% | 55,003 | $9.3M |
| Bank of Nova Scotia | 0.02% | Reduce -43.0% | 53,108 | $8.9M |
| AQR Capital Management | 0.01% | Add +517.2% | 50,256 | $8.5M |
| Citigroup Inc. | 0.01% | Reduce -4.2% | 49,962 | $8.4M |
| Cinctive Capital Management LP | 0.44% | New | 46,787 | $7.9M |
| Natixis | 0.04% | New | 45,648 | $7.7M |
| 4D Advisors, LLC | 4.07% | Add +50.0% | 45,000 | $7.6M |
| Picton Mahoney Asset Management | 0.11% | Add +0.9% | 44,557 | $7.5M |
| California State Teachers Retirement System | 0.01% | Add +0.2% | 43,353 | $7.3M |
| State Board of Administration of Florida Retirement System | 0.01% | Add +1.3% | 43,319 | $7.3M |
| Walleye Capital LLC | 0.07% | Reduce -43.4% | 43,232 | $7.3M |
| NS Partners Ltd | 0.29% | Reduce -2.3% | 42,566 | $7.2M |
| Amundi | 0.00% | Add +1.0% | 41,583 | $7.1M |
| Baird Financial Group, Inc. | 0.01% | Reduce -9.8% | 40,720 | $6.8M |
| New York State Teachers Retirement System | 0.01% | No change | 40,048 | $6.7M |
| Norges Bank | 0.00% | Reduce -0.9% | 39,053 | $6.6M |
| Bridger Management, LLC | 3.34% | Reduce -14.4% | 33,641 | $5.7M |
| Gabelli Funds LLC | 0.04% | Reduce -0.9% | 32,700 | $5.5M |
| Intech Investment Management LLC | 0.05% | Reduce -2.3% | 31,750 | $5.3M |
| Nordea Investment Management AB | 0.00% | Add +21.6% | 31,868 | $5.3M |
| Logan Capital Management Inc. | 0.25% | Reduce -26.1% | 31,352 | $5.3M |
| Sei Investments Co. | 0.01% | Reduce -38.2% | 30,506 | $5.1M |
| Victory Capital Management Inc. | 0.00% | Add +11.4% | 29,368 | $4.9M |
| Wilson Asset Management (international) PTY Ltd. | 1.13% | New | 27,234 | $4.6M |
| Envestnet Asset Management Inc. | 0.00% | Reduce -14.3% | 27,234 | $4.6M |
| Harbor Capital Advisors, Inc. | 0.19% | New | 26,412 | $4.4M |
| MetLife Investment Management, LLC | 0.03% | Add +2.5% | 26,285 | $4.4M |
| CANADA LIFE ASSURANCE Co | 0.01% | Reduce -1.9% | 26,120 | $4.4M |
| Westmount Partners, LLC | 1.20% | Reduce -0.5% | 25,866 | $4.4M |
| Renaissance Technologies | 0.01% | Add +69.2% | 25,377 | $4.3M |
| South Dakota Investment Council | 0.08% | No change | 24,768 | $4.2M |
"% of holder's portfolio" is MASI's weight in each manager's 13F, not the share of Masimo Corp. the manager owns.