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, Q3 2024
Institutional positions in Masimo Corp as of Sep 30, 2024. 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
- 362
- +13 vs. Q2 2024
- Shares held
- 50.4M
- +10.3M (+25.6%) vs. Q2 2024
- Total value
- $6.72B
- +$1.66B (+32.8%) vs. Q2 2024
- New holders
- 61
- 110 more added
- Sold out
- 48
- 122 more reduced
3 institutions that held it in Q2 2024 haven't filed for Q3 2024 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2024
Shares, value and share of portfolio for each institution holding Masimo Corp; share changes are against Q2 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 8,822,269 | $1.18B | 0.02% | +8,822,269 | New |
| FMR LLC | 6,756,618 | $900.9M | 0.05% | +1,970,883+41.2% | Added |
| Politan Capital Management LP | 4,714,746 | $628.6M | 35.50% | 00.0% | Unchanged |
| Vanguard Group Inc | 4,520,487 | $602.7M | 0.01% | −216,864−4.6% | Reduced |
| T. Rowe Price Investment Management, Inc. | 1,526,488 | $203.5M | 0.12% | +372,137+32.2% | Added |
| RTW Investments, LP | 1,462,400 | $195.0M | 2.82% | 00.0% | Unchanged |
| State Street Corp | 1,438,814 | $191.8M | 0.01% | +10,179+0.7% | Added |
| Westfield Capital Management Co LP | 1,394,056 | $185.9M | 0.84% | +262,370+23.2% | Added |
| Capital Research Global Investors | 1,360,328 | $181.4M | 0.04% | +303,192+28.7% | Added |
| Farallon Capital Management, L.L.C. | 1,258,563 | $167.8M | 0.92% | +139,000+12.4% | Added |
| Ace Management Global Ltd. | 965,504 | $128.7M | 38.42% | −95,415−9.0% | Reduced |
| Holocene Advisors, LP | 875,159 | $116.7M | 0.47% | −162,291−15.6% | Reduced |
| Geode Capital Management, LLC | 792,886 | $105.7M | 0.01% | +11,984+1.5% | Added |
| Massachusetts Financial Services Co | 792,166 | $105.6M | 0.03% | +70,440+9.8% | Added |
| Liontrust Investment Partners LLP | 808,693 | $101.8M | 1.45% | 00.0% | Unchanged |
| Alyeska Investment Group, L.P. | 745,127 | $99.3M | 0.51% | +314,196+72.9% | Added |
| Morgan Stanley | 736,856 | $98.2M | 0.01% | +261,053+54.9% | Added |
| Schroder Investment Management Group | 732,621 | $97.6M | 0.10% | +203,998+38.6% | Added |
| Dimensional Fund Advisors LP | 597,698 | $79.7M | 0.02% | +72,104+13.7% | Added |
| Man Group plc | 399,945 | $53.3M | 0.15% | +108,156+37.1% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 372,183 | $49.6M | 0.03% | −18,843−4.8% | Reduced |
| Charles Schwab Investment Management Inc | 370,028 | $49.3M | 0.01% | −23,260−5.9% | Reduced |
| Bamco Inc | 347,200 | $46.3M | 0.12% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 342,827 | $45.7M | 0.10% | +91,871+36.6% | Added |
| Bank of New York Mellon Corp | 341,960 | $45.6M | 0.01% | −47,804−12.3% | Reduced |
| Ensemble Capital Management, LLC | 340,355 | $45.4M | 3.85% | −66,747−16.4% | Reduced |
| Goldman Sachs Group Inc | 332,076 | $44.3M | 0.01% | +196,986+145.8% | Added |
| Northern Trust Corp | 301,041 | $40.1M | 0.01% | −16,262−5.1% | Reduced |
| Norges Bank | 255,388 | $34.1M | 0.00% | +206,693+424.5% | Added |
| Comerica Bank | 245,081 | $32.7M | 0.13% | +54,396+28.5% | Added |
| ING Groep NV | 240,900 | $32.1M | 0.19% | +141,900+143.3% | Added |
| Two Sigma Advisers, LP | 218,600 | $29.1M | 0.07% | +107,000+95.9% | Added |
| Ameriprise Financial Inc | 199,861 | $26.6M | 0.01% | +108,073+117.7% | Added |
| Citadel Advisors LLC | 189,549 | $25.3M | 0.03% | −37,941−16.7% | Reduced |
| Cramer Rosenthal McGlynn LLC | 185,017 | $24.7M | 1.37% | +166,936+923.3% | Added |
| Raymond James & Associates | 175,050 | $23.3M | 0.01% | −5,483−3.0% | Reduced |
| Clearline Capital LP | 160,029 | $21.3M | 1.89% | +160,029 | New |
| JPMorgan Chase & Co | 155,853 | $20.8M | 0.00% | +7,726+5.2% | Added |
| Gotham Asset Management, LLC | 153,486 | $20.5M | 0.21% | +72,727+90.1% | Added |
| Rockefeller Capital Management L.P. | 137,393 | $18.3M | 0.05% | +5,541+4.2% | Added |
| National Bank of Canada | 132,500 | $17.7M | 0.02% | +87,675+195.6% | Added |
| Rhumbline Advisers | 127,014 | $16.9M | 0.02% | −759−0.6% | Reduced |
| Federated Hermes, Inc. | 118,615 | $15.8M | 0.03% | −15,646−11.7% | Reduced |
| Bank of America Corp | 117,845 | $15.7M | 0.00% | +2,816+2.4% | Added |
| Retirement Systems of Alabama | 114,260 | $15.2M | 0.06% | −29,978−20.8% | Reduced |
| UBS Asset Management Americas Inc | 112,471 | $15.0M | 0.00% | −8,357−6.9% | Reduced |
| FIL Ltd | 105,708 | $14.1M | 0.01% | +29,561+38.8% | Added |
| Canada Pension Plan Investment Board | 104,300 | $13.9M | 0.01% | +104,300 | New |
| Principal Financial Group Inc | 102,507 | $13.7M | 0.01% | −46,144−31.0% | Reduced |
| Twin Tree Management, LP | 94,416 | $12.6M | 0.29% | +94,416 | New |
| Legal & General Group Plc | 94,065 | $12.5M | 0.00% | +962+1.0% | Added |
| Swiss National Bank | 88,300 | $11.8M | 0.01% | −200−0.2% | Reduced |
| Invesco Ltd. | 85,158 | $11.4M | 0.00% | +2,107+2.5% | Added |
| Gamco Investors, Inc. Et Al | 84,500 | $11.3M | 0.12% | 00.0% | Unchanged |
| Nuveen Asset Management, LLC | 83,727 | $11.2M | 0.00% | −31,995−27.6% | Reduced |
| California Public Employees Retirement System | 73,313 | $9.77M | 0.01% | −1,400−1.9% | Reduced |
| Price T Rowe Associates Inc | 69,716 | $9.30M | 0.00% | +1,427+2.1% | Added |
| Alliancebernstein L.P. | 68,804 | $9.17M | 0.00% | +6,889+11.1% | Added |
| Citigroup Inc | 62,088 | $8.28M | 0.01% | +17,368+38.8% | Added |
| Montanaro Asset Management Ltd | 55,700 | $7.43M | 1.32% | +2,000+3.7% | Added |
| Erste Asset Management GmbH | 55,000 | $7.33M | 0.09% | −30,000−35.3% | Reduced |
| UBS Group AG | 54,682 | $7.29M | 0.00% | +10,821+24.7% | Added |
| Capital Fund Management S.A. | 53,726 | $7.16M | 0.08% | +30,187+128.2% | Added |
| Squarepoint Ops LLC | 53,226 | $7.10M | 0.02% | +43,540+449.5% | Added |
| Corebridge Financial, Inc. | 52,466 | $7.00M | 0.04% | −4,195−7.4% | Reduced |
| Wells Fargo & Company | 51,598 | $6.88M | 0.00% | +1,650+3.3% | Added |
| Logan Capital Management Inc | 50,352 | $6.71M | 0.28% | −693−1.4% | Reduced |
| Bryn Mawr Trust Co | 49,064 | $6.54M | 0.12% | −225−0.5% | Reduced |
| HRT Financial LP | 48,009 | $6.40M | 0.03% | +24,644+105.5% | Added |
| Nomura Holdings Inc | 47,584 | $6.34M | 0.05% | +47,584 | New |
| TD Asset Management Inc | 46,308 | $6.17M | 0.01% | +12,444+36.7% | Added |
| New York State Teachers Retirement System | 45,448 | $6.06M | 0.01% | −3,600−7.3% | Reduced |
| Walleye Capital LLC | 44,875 | $5.98M | 0.06% | +44,133+5,947.8% | Added |
| NS Partners Ltd | 43,037 | $5.74M | 0.24% | +986+2.3% | Added |
| State Board of Administration of Florida Retirement System | 42,901 | $5.72M | 0.01% | 00.0% | Unchanged |
| California State Teachers Retirement System | 42,612 | $5.68M | 0.01% | −1,149−2.6% | Reduced |
| Sterling Capital Management LLC | 40,939 | $5.46M | 0.07% | +40,939 | New |
| Barclays PLC | 39,957 | $5.33M | 0.00% | +24,137+152.6% | Added |
| PEAK6 Investments LLC | 39,515 | $5.27M | 0.26% | +7,173+22.2% | Added |
| Great West Life Assurance Co | 37,560 | $5.01M | 0.01% | +10,146+37.0% | Added |
| Manufacturers Life Insurance Company, The | 36,526 | $4.87M | 0.00% | −1,209−3.2% | Reduced |
| Bank of Nova Scotia | 35,438 | $4.72M | 0.01% | +35,438 | New |
| Roubaix Capital, LLC | 34,041 | $4.54M | 2.50% | +9,202+37.0% | Added |
| Susquehanna Portfolio Strategies, LLC | 33,995 | $4.53M | 0.31% | −37,794−52.6% | Reduced |
| Gabelli Funds LLC | 33,000 | $4.40M | 0.03% | 00.0% | Unchanged |
| Healthcare of Ontario Pension Plan Trust Fund | 30,900 | $4.12M | 0.01% | +30,900 | New |
| South Dakota Investment Council | 30,611 | $4.08M | 0.08% | 00.0% | Unchanged |
| Millennium Management LLC | 29,253 | $3.90M | 0.00% | −724,490−96.1% | Reduced |
| SG Americas Securities, LLC | 28,967 | $3.86M | 0.01% | +28,967 | New |
| SEI Investments Co | 28,082 | $3.74M | 0.00% | +4,488+19.0% | Added |
| Zacks Investment Management | 26,558 | $3.54M | 0.03% | −296−1.1% | Reduced |
| Envestnet Asset Management Inc | 26,528 | $3.54M | 0.00% | +4,225+18.9% | Added |
| New York State Common Retirement Fund | 26,163 | $3.49M | 0.00% | −11,579−30.7% | Reduced |
| Westmount Partners, LLC | 25,991 | $3.47M | 1.04% | 00.0% | Unchanged |
| Amundi | 24,035 | $3.36M | 0.00% | +24,035 | New |
| State of Wisconsin Investment Board | 25,141 | $3.35M | 0.01% | +6,684+36.2% | Added |
| Troluce Capital Advisors LLC | 25,000 | $3.33M | 0.60% | +25,000 | New |
| Jane Street Group, LLC | 24,680 | $3.29M | 0.01% | −4,923−16.6% | Reduced |
| D. E. Shaw & Co., Inc. | 24,358 | $3.25M | 0.00% | +24,358 | New |
| Mutual of America Capital Management LLC | 23,865 | $3.18M | 0.03% | −1,667−6.5% | Reduced |