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 2024
Institutional positions in Masimo Corp as of Mar 31, 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
- 339
- 0 vs. Q4 2023
- Shares held
- 51.7M
- +1.31M (+2.6%) vs. Q4 2023
- Total value
- $7.59B
- +$1.69B (+28.6%) vs. Q4 2023
- New holders
- 50
- 96 more added
- Sold out
- 50
- 127 more reduced
3 institutions that held it in Q4 2023 haven't filed for Q1 2024 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2023: 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 2024
Shares, value and share of portfolio for each institution holding Masimo Corp; share changes are against Q4 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock Inc. | 7,880,374 | $1.16B | 0.03% | +2,221,243+39.3% | Added |
| FMR LLC | 6,977,281 | $1.02B | 0.07% | +49,709+0.7% | Added |
| Politan Capital Management LP | 4,713,518 | $692.2M | 36.00% | 00.0% | Unchanged |
| Vanguard Group Inc | 4,555,853 | $669.0M | 0.01% | −225,490−4.7% | Reduced |
| Capital Research Global Investors | 2,269,246 | $333.2M | 0.08% | +570.0% | Added |
| Massachusetts Financial Services Co | 1,721,785 | $252.8M | 0.08% | +114,475+7.1% | Added |
| Farallon Capital Management, L.L.C. | 1,489,563 | $218.7M | 1.29% | +177,914+13.6% | Added |
| RTW Investments, LP | 1,462,400 | $214.8M | 3.17% | 00.0% | Unchanged |
| State Street Corp | 1,360,322 | $199.8M | 0.01% | +2,920+0.2% | Added |
| Citadel Advisors LLC | 1,345,216 | $197.5M | 0.19% | +581,137+76.1% | Added |
| T. Rowe Price Investment Management, Inc. | 1,205,063 | $177.0M | 0.11% | +43,156+3.7% | Added |
| Ace Management Global Ltd. | 1,169,352 | $171.7M | 63.47% | +1,169,352 | New |
| Thrivent Financial for Lutherans | 856,860 | $125.8M | 0.25% | −206,521−19.4% | Reduced |
| Liontrust Investment Partners LLP | 825,529 | $121.2M | 1.69% | −26,864−3.2% | Reduced |
| Holocene Advisors, LP | 778,414 | $114.3M | 0.42% | +778,414 | New |
| Geode Capital Management, LLC | 754,160 | $110.8M | 0.01% | +30,224+4.2% | Added |
| Westfield Capital Management Co LP | 686,100 | $100.8M | 0.53% | −132,376−16.2% | Reduced |
| Schroder Investment Management Group | 527,336 | $77.4M | 0.09% | −350,203−39.9% | Reduced |
| Morgan Stanley | 471,459 | $69.2M | 0.01% | +13,435+2.9% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 391,889 | $57.5M | 0.04% | −21,926−5.3% | Reduced |
| Bank of New York Mellon Corp | 390,925 | $57.4M | 0.01% | −24,910−6.0% | Reduced |
| MIG Capital, LLC | 381,732 | $56.1M | 7.79% | −65,547−14.7% | Reduced |
| Alyeska Investment Group, L.P. | 379,419 | $55.7M | 0.35% | −155,296−29.0% | Reduced |
| Charles Schwab Investment Management Inc | 378,375 | $55.6M | 0.01% | +10,334+2.8% | Added |
| Ensemble Capital Management, LLC | 366,335 | $53.8M | 4.51% | −5,843−1.6% | Reduced |
| Dimensional Fund Advisors LP | 360,337 | $52.9M | 0.01% | +58,849+19.5% | Added |
| JPMorgan Chase & Co | 358,058 | $52.6M | 0.00% | +2,859+0.8% | Added |
| Millennium Management LLC | 347,016 | $51.0M | 0.04% | +150,556+76.6% | Added |
| Bamco Inc | 345,800 | $50.8M | 0.14% | +345,800 | New |
| Point72 Asset Management, L.P. | 326,154 | $47.9M | 0.14% | −190,202−36.8% | Reduced |
| Jackson Square Partners, LLC | 296,458 | $43.5M | 1.81% | −465,871−61.1% | Reduced |
| Northern Trust Corp | 277,451 | $40.7M | 0.01% | −69,902−20.1% | Reduced |
| Balyasny Asset Management LLC | 255,508 | $37.5M | 0.10% | −47,027−15.5% | Reduced |
| ArrowMark Colorado Holdings LLC | 218,810 | $32.1M | 0.37% | −206,903−48.6% | Reduced |
| Raymond James & Associates | 181,611 | $26.7M | 0.02% | +1,996+1.1% | Added |
| Senator Investment Group LP | 174,000 | $25.6M | 1.16% | +64,000+58.2% | Added |
| Principal Financial Group Inc | 167,748 | $24.6M | 0.01% | +3,121+1.9% | Added |
| Federated Hermes, Inc. | 155,385 | $22.8M | 0.05% | −13,266−7.9% | Reduced |
| Retirement Systems of Alabama | 144,938 | $21.3M | 0.08% | +146+0.1% | Added |
| Rhumbline Advisers | 133,132 | $19.6M | 0.02% | −4,819−3.5% | Reduced |
| Bank of America Corp | 130,290 | $19.1M | 0.00% | +110,661+563.8% | Added |
| Goldman Sachs Group Inc | 122,453 | $18.0M | 0.00% | −53,057−30.2% | Reduced |
| Rockefeller Capital Management L.P. | 116,673 | $17.1M | 0.05% | −11,418−8.9% | Reduced |
| Erste Asset Management GmbH | 115,000 | $16.9M | 0.23% | +115,000 | New |
| Montanaro Asset Management Ltd | 107,100 | $15.7M | 2.84% | +2,850+2.7% | Added |
| Comerica Bank | 102,695 | $15.1M | 0.06% | −6,564−6.0% | Reduced |
| Legal & General Group Plc | 99,773 | $14.7M | 0.00% | −91,425−47.8% | Reduced |
| SEI Investments Co | 95,642 | $14.0M | 0.02% | −84,986−47.1% | Reduced |
| Marshall Wace, LLP | 90,207 | $13.2M | 0.02% | −98,846−52.3% | Reduced |
| Nuveen Asset Management, LLC | 89,358 | $13.1M | 0.00% | −3,710−4.0% | Reduced |
| Swiss National Bank | 88,600 | $13.0M | 0.01% | +200+0.2% | Added |
| Gamco Investors, Inc. Et Al | 84,500 | $12.4M | 0.13% | 00.0% | Unchanged |
| UBS Asset Management Americas Inc | 83,182 | $12.2M | 0.00% | −19,093−18.7% | Reduced |
| Invesco Ltd. | 79,040 | $11.6M | 0.00% | +937+1.2% | Added |
| Ameriprise Financial Inc | 78,881 | $11.6M | 0.00% | −3,914−4.7% | Reduced |
| Gotham Asset Management, LLC | 77,098 | $11.3M | 0.17% | −2,958−3.7% | Reduced |
| FIL Ltd | 73,187 | $10.7M | 0.01% | −143,287−66.2% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 72,729 | $10.7M | 0.25% | −12,445−14.6% | Reduced |
| Price T Rowe Associates Inc | 71,548 | $10.5M | 0.00% | −338,960−82.6% | Reduced |
| State Board of Administration of Florida Retirement System | 54,839 | $10.1M | 0.02% | +5,688+11.6% | Added |
| Wells Fargo & Company | 67,364 | $9.89M | 0.00% | −49,348−42.3% | Reduced |
| Barclays PLC | 66,040 | $9.70M | 0.00% | +16,780+34.1% | Added |
| First Trust Advisors LP | 62,526 | $9.18M | 0.01% | +59,335+1,859.4% | Added |
| Picton Mahoney Asset Management | 61,990 | $9.10M | 0.38% | −41,047−39.8% | Reduced |
| California Public Employees Retirement System | 61,615 | $9.05M | 0.01% | −15,843−20.5% | Reduced |
| Alliancebernstein L.P. | 61,055 | $8.97M | 0.00% | −6,462−9.6% | Reduced |
| American International Group, Inc. | 59,110 | $8.68M | 0.03% | −1,211−2.0% | Reduced |
| BNP Paribas Arbitrage, SA | 57,254 | $8.41M | 0.01% | −4,578−7.4% | Reduced |
| Citigroup Inc | 55,923 | $8.21M | 0.01% | +3,309+6.3% | Added |
| Woodline Partners LP | 53,146 | $7.80M | 0.07% | −229,129−81.2% | Reduced |
| Logan Capital Management Inc | 51,113 | $7.51M | 0.32% | +1,240+2.5% | Added |
| New York State Teachers Retirement System | 50,748 | $7.45M | 0.02% | +200+0.4% | Added |
| Bryn Mawr Trust Co | 50,080 | $7.35M | 0.28% | +50,080 | New |
| Mirae Asset Global Investments Co., Ltd. | 42,196 | $7.28M | 0.02% | +10,683+33.9% | Added |
| Credit Suisse AG | 47,782 | $7.02M | 0.01% | +503+1.1% | Added |
| Allspring Global Investments Holdings, LLC | 46,607 | $6.84M | 0.01% | +22,141+90.5% | Added |
| California State Teachers Retirement System | 44,793 | $6.58M | 0.01% | −2,364−5.0% | Reduced |
| UBS Group AG | 43,752 | $6.42M | 0.00% | +11,628+36.2% | Added |
| NS Partners Ltd | 41,885 | $6.15M | 0.28% | +6,267+17.6% | Added |
| CenterBook Partners LP | 41,313 | $6.07M | 0.42% | +1,909+4.8% | Added |
| Texas Permanent School Fund | 38,847 | $5.70M | 0.05% | +547+1.4% | Added |
| PEAK6 Investments LLC | 38,758 | $5.69M | 0.28% | +1,634+4.4% | Added |
| Manufacturers Life Insurance Company, The | 38,277 | $5.62M | 0.01% | −18,291−32.3% | Reduced |
| Moran Wealth Management, LLC | 37,380 | $5.49M | 0.18% | +1,632+4.6% | Added |
| New York State Common Retirement Fund | 37,375 | $5.49M | 0.01% | −9,929−21.0% | Reduced |
| Trexquant Investment LP | 35,755 | $5.25M | 0.10% | +35,755 | New |
| British Columbia Investment Management Corp | 35,000 | $5.14M | 0.04% | 00.0% | Unchanged |
| Norges Bank | 34,407 | $5.05M | 0.00% | +25,450+284.1% | Added |
| TD Asset Management Inc | 34,230 | $5.03M | 0.00% | −45,200−56.9% | Reduced |
| APG Asset Management N.V. | 36,669 | $4.99M | 0.01% | +30,946+540.7% | Added |
| Gabelli Funds LLC | 33,000 | $4.85M | 0.04% | 00.0% | Unchanged |
| South Dakota Investment Council | 30,647 | $4.50M | 0.09% | −1,800−5.5% | Reduced |
| Storebrand Asset Management AS | 28,192 | $4.14M | 0.01% | −768−2.7% | Reduced |
| Brown Capital Management LLC | 26,844 | $3.94M | 0.07% | −128−0.5% | Reduced |
| State of New Jersey Common Pension Fund D | 26,666 | $3.92M | 0.01% | 00.0% | Unchanged |
| Royal Bank of Canada | 26,546 | $3.90M | 0.00% | −930−3.4% | Reduced |
| Mutual of America Capital Management LLC | 26,447 | $3.88M | 0.04% | −1,060−3.9% | Reduced |
| Westmount Partners, LLC | 26,424 | $3.88M | 1.40% | 00.0% | Unchanged |
| MetLife Investment Management | 26,144 | $3.84M | 0.03% | −636−2.4% | Reduced |
| Great West Life Assurance Co | 25,446 | $3.73M | 0.01% | −7,124−21.9% | Reduced |