Masimo Corp
MASIDelisted Jun 10, 2026- Industry
- Electromedical & Electrotherapeutic Apparatus
- SEC CIK
- 0000937556
Masimo Corp was delisted on Jun 10, 2026; its insiders filed their last Form 4 on Jun 12, 2026; 451 institutions reported holding it in 13F filings for Q1 2026, worth $9.69B in total; Soros Fund Management was the only superinvestor holding it.
13F holders, Q1 2025
Institutional positions in Masimo Corp as of Mar 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 393
- +31 vs. Q4 2024
- Shares held
- 54.2M
- +2.83M (+5.5%) vs. Q4 2024
- Total value
- $9.02B
- +$532.2M (+6.3%) vs. Q4 2024
- New holders
- 77
- 136 more added
- Sold out
- 46
- 118 more reduced
4 institutions that held it in Q4 2024 haven't filed for Q1 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2024: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting MASI on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 2 | $16.2K |
| Q1 2026 | 451 | $9.69B |
| Q4 2025 | 392 | $7.20B |
| Q3 2025 | 358 | $8.29B |
| Q2 2025 | 379 | $9.68B |
| Q1 2025 | 393 | $9.02B |
| Q4 2024 | 366 | $8.50B |
| Q3 2024 | 362 | $6.72B |
| Q2 2024 | 352 | $6.24B |
| Q1 2024 | 339 | $7.59B |
| Q4 2023 | 342 | $5.91B |
| Q3 2023 | 357 | $4.18B |
| Q2 2023 | 415 | $7.56B |
| Q1 2023 | 428 | $8.30B |
| Q4 2022 | 405 | $6.58B |
| Q3 2022 | 418 | $6.54B |
| Q2 2022 | 417 | $5.81B |
| Q1 2022 | 457 | $6.61B |
| Q4 2021 | 520 | $13.6B |
| Q3 2021 | 475 | $12.5B |
| Q2 2021 | 459 | $11.1B |
| Q1 2021 | 481 | $10.3B |
Institutions, Q1 2025
Shares, value and share of portfolio for each institution holding Masimo Corp; share changes are against Q4 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 9,871,428 | $1.64B | 0.03% | +1,173,215+13.5% | Added |
| FMR LLC | 8,178,763 | $1.36B | 0.09% | +81,309+1.0% | Added |
| Politan Capital Management LP | 4,714,746 | $785.5M | 53.37% | 00.0% | Unchanged |
| Vanguard Group Inc | 4,583,276 | $763.6M | 0.01% | −3,426−0.1% | Reduced |
| Capital Research Global Investors | 2,056,095 | $342.5M | 0.07% | −398,880−16.2% | Reduced |
| Massachusetts Financial Services Co | 1,967,838 | $327.8M | 0.11% | +232,671+13.4% | Added |
| T. Rowe Price Investment Management, Inc. | 1,673,252 | $278.8M | 0.18% | +10,876+0.7% | Added |
| State Street Corp | 1,475,991 | $245.9M | 0.01% | +12,525+0.9% | Added |
| Holocene Advisors, LP | 1,333,296 | $222.1M | 0.66% | +497,636+59.6% | Added |
| Durable Capital Partners LP | 1,125,619 | $187.5M | 1.68% | +1,125,619 | New |
| Alliancebernstein L.P. | 865,870 | $144.3M | 0.05% | −81,521−8.6% | Reduced |
| Geode Capital Management, LLC | 844,318 | $140.7M | 0.01% | +43,193+5.4% | Added |
| Liontrust Investment Partners LLP | 747,498 | $124.5M | 1.94% | −45,437−5.7% | Reduced |
| Morgan Stanley | 735,782 | $122.6M | 0.01% | −2,059−0.3% | Reduced |
| Alyeska Investment Group, L.P. | 722,534 | $120.4M | 0.48% | +143,899+24.9% | Added |
| Dimensional Fund Advisors LP | 703,378 | $117.2M | 0.03% | +55,658+8.6% | Added |
| RTW Investments, LP | 683,294 | $113.8M | 1.74% | 00.0% | Unchanged |
| Westfield Capital Management Co LP | 671,479 | $111.9M | 0.54% | −97,379−12.7% | Reduced |
| Schroder Investment Management Group | 435,548 | $71.2M | 0.07% | −130,921−23.1% | Reduced |
| Northern Trust Corp | 383,356 | $63.9M | 0.01% | −513−0.1% | Reduced |
| Charles Schwab Investment Management Inc | 377,070 | $62.8M | 0.01% | −766−0.2% | Reduced |
| Sumitomo Mitsui Trust Holdings, Inc. | 372,978 | $62.1M | 0.04% | −727−0.2% | Reduced |
| CI Private Wealth, LLC | 348,038 | $58.0M | 0.09% | +355+0.1% | Added |
| Bank of New York Mellon Corp | 332,108 | $55.3M | 0.01% | −5,113−1.5% | Reduced |
| Bamco Inc | 317,282 | $52.9M | 0.16% | +10,138+3.3% | Added |
| Bank of America Corp | 316,643 | $52.8M | 0.00% | +209,340+195.1% | Added |
| Point72 Asset Management, L.P. | 315,422 | $52.5M | 0.15% | +66,923+26.9% | Added |
| Artisan Partners Limited Partnership | 299,023 | $49.8M | 0.08% | +299,023 | New |
| Price T Rowe Associates Inc | 282,637 | $47.1M | 0.01% | +31,851+12.7% | Added |
| Goldman Sachs Group Inc | 280,255 | $46.7M | 0.01% | +78,003+38.6% | Added |
| Invesco Ltd. | 261,358 | $43.5M | 0.01% | −16,602−6.0% | Reduced |
| JPMorgan Chase & Co | 246,489 | $41.1M | 0.00% | +117,850+91.6% | Added |
| Ameriprise Financial Inc | 211,786 | $35.3M | 0.01% | −4,160−1.9% | Reduced |
| Raymond James Financial Inc | 206,116 | $34.3M | 0.01% | +2,145+1.1% | Added |
| UBS Asset Management Americas Inc | 189,130 | $31.5M | 0.01% | −1,116−0.6% | Reduced |
| UBS Group AG | 170,177 | $28.4M | 0.01% | +10,149+6.3% | Added |
| FIL Ltd | 169,788 | $28.3M | 0.03% | +59,456+53.9% | Added |
| Nuveen, LLC | 155,045 | $25.8M | 0.01% | +155,045 | New |
| Cramer Rosenthal McGlynn LLC | 151,664 | $25.3M | 1.82% | −71,153−31.9% | Reduced |
| First Trust Advisors LP | 145,164 | $24.2M | 0.02% | +97,836+206.7% | Added |
| Gotham Asset Management, LLC | 144,590 | $24.1M | 0.20% | +16,810+13.2% | Added |
| Verition Fund Management LLC | 143,759 | $24.0M | 0.14% | +136,278+1,821.7% | Added |
| Comerica Bank | 137,855 | $23.0M | 0.10% | −3,523−2.5% | Reduced |
| Millennium Management LLC | 134,806 | $22.5M | 0.02% | −273,252−67.0% | Reduced |
| Woodline Partners LP | 132,969 | $22.2M | 0.14% | +81,784+159.8% | Added |
| Rhumbline Advisers | 122,811 | $20.5M | 0.02% | −1,562−1.3% | Reduced |
| Rockefeller Capital Management L.P. | 117,326 | $19.5M | 0.05% | +26,425+29.1% | Added |
| Toroso Investments, LLC | 110,486 | $18.4M | 0.16% | +23,755+27.4% | Added |
| Principal Financial Group Inc | 102,661 | $17.1M | 0.01% | +10.0% | Added |
| Legal & General Group Plc | 99,542 | $16.6M | 0.00% | +2,355+2.4% | Added |
| BLI - Banque de Luxembourg Investments | 101,200 | $16.5M | 0.50% | 00.0% | Unchanged |
| Bank of Nova Scotia | 93,203 | $15.5M | 0.03% | +93,203 | New |
| Great Lakes Advisors, LLC | 92,872 | $15.5M | 0.14% | −2,858−3.0% | Reduced |
| Erste Asset Management GmbH | 92,000 | $15.3M | 0.20% | +9,348+11.3% | Added |
| TD Asset Management Inc | 88,668 | $14.8M | 0.01% | +4,028+4.8% | Added |
| Swiss National Bank | 88,200 | $14.7M | 0.01% | −1,200−1.3% | Reduced |
| Gamco Investors, Inc. Et Al | 84,500 | $14.1M | 0.15% | 00.0% | Unchanged |
| American Century Companies Inc | 79,176 | $13.2M | 0.01% | +66,517+525.5% | Added |
| Walleye Capital LLC | 76,370 | $12.7M | 0.14% | +21,432+39.0% | Added |
| Neuberger Berman Group LLC | 74,962 | $12.5M | 0.01% | −63,160−45.7% | Reduced |
| BNP Paribas Arbitrage, SA | 70,723 | $11.8M | 0.01% | +63,703+907.5% | Added |
| California Public Employees Retirement System | 69,875 | $11.6M | 0.01% | −354−0.5% | Reduced |
| Bellevue Group AG | 69,808 | $11.6M | 0.26% | +45,642+188.9% | Added |
| Quantinno Capital Management LP | 63,739 | $10.6M | 0.07% | +59,749+1,497.5% | Added |
| ExodusPoint Capital Management, LP | 59,792 | $9.96M | 0.13% | +34,366+135.2% | Added |
| Retirement Systems of Alabama | 54,087 | $9.01M | 0.04% | +52+0.1% | Added |
| Manufacturers Life Insurance Company, The | 53,900 | $8.98M | 0.01% | +2,443+4.7% | Added |
| Citigroup Inc | 52,158 | $8.69M | 0.01% | −39,533−43.1% | Reduced |
| Federated Hermes, Inc. | 51,002 | $8.50M | 0.02% | −1,732−3.3% | Reduced |
| Citadel Advisors LLC | 49,482 | $8.24M | 0.01% | −391,543−88.8% | Reduced |
| SEI Investments Co | 49,365 | $8.22M | 0.01% | +22,764+85.6% | Added |
| Corebridge Financial, Inc. | 49,327 | $8.22M | 0.05% | −1,209−2.4% | Reduced |
| Baird Financial Group, Inc. | 45,120 | $7.52M | 0.01% | +10,922+31.9% | Added |
| Integral Health Asset Management, LLC | 45,000 | $7.50M | 0.83% | +45,000 | New |
| Picton Mahoney Asset Management | 44,152 | $7.36M | 0.25% | +1,542+3.6% | Added |
| Royal Bank of Canada | 43,884 | $7.31M | 0.00% | +13,513+44.5% | Added |
| NS Partners Ltd | 43,555 | $7.26M | 0.32% | +906+2.1% | Added |
| California State Teachers Retirement System | 43,252 | $7.21M | 0.01% | +869+2.1% | Added |
| State Board of Administration of Florida Retirement System | 42,771 | $7.13M | 0.01% | −90−0.2% | Reduced |
| Logan Capital Management Inc | 42,395 | $7.06M | 0.32% | −5,392−11.3% | Reduced |
| Point72 (DIFC) Ltd | 41,639 | $6.94M | 0.67% | −16,778−28.7% | Reduced |
| STRS Ohio | 40,135 | $6.69M | 0.03% | +24,735+160.6% | Added |
| New York State Teachers Retirement System | 40,048 | $6.67M | 0.02% | −5,200−11.5% | Reduced |
| Barclays PLC | 39,853 | $6.64M | 0.00% | −13,366−25.1% | Reduced |
| Norges Bank | 39,414 | $6.57M | 0.00% | +6,020+18.0% | Added |
| Bridger Management, LLC | 39,300 | $6.55M | 3.25% | +39,300 | New |
| Allspring Global Investments Holdings, LLC | 38,302 | $6.42M | 0.01% | −10,462−21.5% | Reduced |
| Amundi | 41,167 | $6.27M | 0.00% | −70,314−63.1% | Reduced |
| Russell Investments Group, Ltd. | 34,747 | $5.79M | 0.01% | +15,044+76.4% | Added |
| Gabelli Funds LLC | 33,000 | $5.50M | 0.04% | 00.0% | Unchanged |
| Intech Investment Management LLC | 32,494 | $5.41M | 0.06% | +6,872+26.8% | Added |
| Montanaro Asset Management Ltd | 32,300 | $5.38M | 1.58% | −14,200−30.5% | Reduced |
| Envestnet Asset Management Inc | 31,788 | $5.30M | 0.00% | +681+2.2% | Added |
| Lisanti Capital Growth, LLC | 30,485 | $5.08M | 1.51% | +30,485 | New |
| Perpetual Ltd | 30,209 | $5.03M | 0.06% | +30,209 | New |
| 4D Advisors, LLC | 30,000 | $5.00M | 3.88% | +30,000 | New |
| Zacks Investment Management | 27,807 | $4.63M | 0.04% | +578+2.1% | Added |
| Advisors Asset Management, Inc. | 27,288 | $4.55M | 0.09% | +4,314+18.8% | Added |
| Great West Life Assurance Co | 26,612 | $4.43M | 0.01% | −10,948−29.1% | Reduced |
| Victory Capital Management Inc | 26,367 | $4.39M | 0.00% | +17,363+192.8% | Added |