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, Q4 2023
Institutional positions in Masimo Corp as of Dec 31, 2023. 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
- 342
- −10 vs. Q3 2023
- Shares held
- 50.4M
- +3.05M (+6.5%) vs. Q3 2023
- Total value
- $5.91B
- +$1.75B (+42.3%) vs. Q3 2023
- New holders
- 63
- 111 more added
- Sold out
- 73
- 121 more reduced
5 institutions that held it in Q3 2023 haven't filed for Q4 2023 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2023
Shares, value and share of portfolio for each institution holding Masimo Corp; share changes are against Q3 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| FMR LLC | 6,927,572 | $812.0M | 0.06% | +1,680,009+32.0% | Added |
| BlackRock Inc. | 5,659,131 | $663.3M | 0.02% | +246,798+4.6% | Added |
| Vanguard Group Inc | 4,781,343 | $560.4M | 0.01% | +26,473+0.6% | Added |
| Politan Capital Management LP | 4,713,518 | $552.5M | 31.54% | 00.0% | Unchanged |
| Capital Research Global Investors | 2,269,189 | $266.0M | 0.07% | +136,617+6.4% | Added |
| Massachusetts Financial Services Co | 1,607,310 | $188.4M | 0.06% | +93,861+6.2% | Added |
| RTW Investments, LP | 1,462,400 | $171.4M | 2.68% | −39,093−2.6% | Reduced |
| State Street Corp | 1,357,402 | $159.1M | 0.01% | −45,806−3.3% | Reduced |
| Farallon Capital Management, L.L.C. | 1,311,649 | $153.7M | 0.96% | +1,084,000+476.2% | Added |
| T. Rowe Price Investment Management, Inc. | 1,161,907 | $136.2M | 0.09% | +244,381+26.6% | Added |
| Thrivent Financial for Lutherans | 1,063,381 | $124.6M | 0.27% | +1,048,462+7,027.7% | Added |
| Schroder Investment Management Group | 877,539 | $102.9M | 0.13% | +327,863+59.6% | Added |
| Liontrust Investment Partners LLP | 852,393 | $99.9M | 1.45% | −54,045−6.0% | Reduced |
| Westfield Capital Management Co LP | 818,476 | $95.9M | 0.56% | +214,795+35.6% | Added |
| Citadel Advisors LLC | 764,079 | $89.6M | 0.09% | +507,387+197.7% | Added |
| Jackson Square Partners, LLC | 762,329 | $89.4M | 2.90% | −99,379−11.5% | Reduced |
| Geode Capital Management, LLC | 723,936 | $84.9M | 0.01% | +24,183+3.5% | Added |
| Alyeska Investment Group, L.P. | 534,715 | $62.7M | 0.42% | +534,715 | New |
| Point72 Asset Management, L.P. | 516,356 | $60.5M | 0.18% | +329,712+176.7% | Added |
| Morgan Stanley | 458,024 | $53.7M | 0.00% | −43,880−8.7% | Reduced |
| MIG Capital, LLC | 447,279 | $52.4M | 7.32% | +48,347+12.1% | Added |
| ArrowMark Colorado Holdings LLC | 425,713 | $49.9M | 0.55% | +122,862+40.6% | Added |
| Bank of New York Mellon Corp | 415,835 | $48.7M | 0.01% | +25,212+6.5% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 413,815 | $48.5M | 0.04% | +8,498+2.1% | Added |
| Price T Rowe Associates Inc | 410,508 | $48.1M | 0.01% | −41,431−9.2% | Reduced |
| Ensemble Capital Management, LLC | 372,178 | $43.6M | 3.88% | +4,138+1.1% | Added |
| Charles Schwab Investment Management Inc | 368,041 | $43.1M | 0.01% | +20,519+5.9% | Added |
| JPMorgan Chase & Co | 355,199 | $41.6M | 0.00% | +263,324+286.6% | Added |
| Northern Trust Corp | 347,353 | $40.7M | 0.01% | +13,577+4.1% | Added |
| Hawk Ridge Capital Management LP | 342,528 | $40.1M | 2.30% | −225,237−39.7% | Reduced |
| Balyasny Asset Management LLC | 302,535 | $35.5M | 0.10% | +52,107+20.8% | Added |
| Dimensional Fund Advisors LP | 301,488 | $35.3M | 0.01% | +16,042+5.6% | Added |
| Woodline Partners LP | 282,275 | $33.1M | 0.36% | +211,496+298.8% | Added |
| FIL Ltd | 216,474 | $25.4M | 0.03% | +99,004+84.3% | Added |
| Millennium Management LLC | 196,460 | $23.0M | 0.02% | −44,741−18.5% | Reduced |
| Legal & General Group Plc | 191,198 | $22.4M | 0.01% | −10,481−5.2% | Reduced |
| Marshall Wace, LLP | 189,053 | $22.2M | 0.04% | +189,053 | New |
| SEI Investments Co | 180,628 | $21.2M | 0.03% | −3,312−1.8% | Reduced |
| Raymond James & Associates | 179,615 | $21.1M | 0.02% | −22,037−10.9% | Reduced |
| Goldman Sachs Group Inc | 175,510 | $20.6M | 0.00% | +90,572+106.6% | Added |
| Federated Hermes, Inc. | 168,651 | $19.8M | 0.05% | −984−0.6% | Reduced |
| Principal Financial Group Inc | 164,627 | $19.3M | 0.01% | −1,160−0.7% | Reduced |
| Nine Ten Capital Management LLC | 163,925 | $19.2M | 4.83% | +163,925 | New |
| Retirement Systems of Alabama | 144,792 | $17.0M | 0.07% | +194+0.1% | Added |
| Rhumbline Advisers | 137,951 | $16.2M | 0.02% | −4,578−3.2% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 137,294 | $16.1M | 0.04% | −248,122−64.4% | Reduced |
| Rockefeller Capital Management L.P. | 128,091 | $15.0M | 0.05% | −5,628−4.2% | Reduced |
| Wells Fargo & Company | 116,712 | $13.7M | 0.00% | +86,162+282.0% | Added |
| Twin Tree Management, LP | 112,419 | $13.2M | 0.24% | +112,419 | New |
| Senator Investment Group LP | 110,000 | $12.9M | 0.55% | +110,000 | New |
| Comerica Bank | 109,259 | $12.8M | 0.06% | +12,845+13.3% | Added |
| Montanaro Asset Management Ltd | 104,250 | $12.2M | 2.30% | −38,000−26.7% | Reduced |
| Picton Mahoney Asset Management | 103,037 | $12.1M | 0.56% | +103,037 | New |
| UBS Asset Management Americas Inc | 102,275 | $12.0M | 0.00% | +1,117+1.1% | Added |
| Nuveen Asset Management, LLC | 93,068 | $10.9M | 0.00% | −1,145−1.2% | Reduced |
| Swiss National Bank | 88,400 | $10.4M | 0.01% | −10,200−10.3% | Reduced |
| Jane Street Group, LLC | 86,506 | $10.1M | 0.01% | −90,109−51.0% | Reduced |
| Baillie Gifford & Co | 86,188 | $10.1M | 0.01% | −5,041−5.5% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 85,174 | $9.98M | 0.18% | +85,174 | New |
| Gamco Investors, Inc. Et Al | 84,500 | $9.90M | 0.11% | 00.0% | Unchanged |
| Ameriprise Financial Inc | 82,795 | $9.70M | 0.00% | +8,741+11.8% | Added |
| Gotham Asset Management, LLC | 80,056 | $9.38M | 0.17% | +74,803+1,424.0% | Added |
| TD Asset Management Inc | 79,430 | $9.31M | 0.01% | +8,000+11.2% | Added |
| Invesco Ltd. | 78,103 | $9.15M | 0.00% | −21,859−21.9% | Reduced |
| California Public Employees Retirement System | 77,458 | $9.08M | 0.01% | −5,837−7.0% | Reduced |
| Alliancebernstein L.P. | 67,517 | $7.91M | 0.00% | +5,485+8.8% | Added |
| Clearline Capital LP | 62,197 | $7.29M | 0.81% | −213,452−77.4% | Reduced |
| BNP Paribas Arbitrage, SA | 61,832 | $7.25M | 0.01% | −65,910−51.6% | Reduced |
| American International Group, Inc. | 60,321 | $7.07M | 0.03% | −2,564−4.1% | Reduced |
| Manufacturers Life Insurance Company, The | 56,568 | $6.63M | 0.00% | +831+1.5% | Added |
| Kornitzer Capital Management Inc | 53,000 | $6.21M | 0.12% | +53,000 | New |
| Citigroup Inc | 52,614 | $6.17M | 0.01% | −969−1.8% | Reduced |
| ExodusPoint Capital Management, LP | 51,289 | $6.01M | 0.07% | −65,320−56.0% | Reduced |
| New York State Teachers Retirement System | 50,548 | $5.92M | 0.01% | −2,500−4.7% | Reduced |
| Logan Capital Management Inc | 49,873 | $5.85M | 0.27% | −1,415−2.8% | Reduced |
| Barclays PLC | 49,260 | $5.77M | 0.00% | +17,932+57.2% | Added |
| State Board of Administration of Florida Retirement System | 49,151 | $5.76M | 0.01% | +1,945+4.1% | Added |
| New York State Common Retirement Fund | 47,304 | $5.54M | 0.01% | −5,514−10.4% | Reduced |
| Credit Suisse AG | 47,279 | $5.54M | 0.01% | +4,590+10.8% | Added |
| California State Teachers Retirement System | 47,157 | $5.53M | 0.01% | −2,124−4.3% | Reduced |
| Bridgewater Associates, LP | 45,726 | $5.36M | 0.03% | −7,442−14.0% | Reduced |
| 13D Management LLC | 44,095 | $5.17M | 3.04% | +21,982+99.4% | Added |
| Man Group plc | 41,955 | $4.92M | 0.01% | – | – |
| Polar Asset Management Partners Inc. | 40,200 | $4.71M | 0.13% | +40,200 | New |
| CenterBook Partners LP | 39,404 | $4.62M | 0.56% | −1,772−4.3% | Reduced |
| Texas Permanent School Fund | 38,300 | $4.49M | 0.04% | +677+1.8% | Added |
| Lighthouse Investment Partners, LLC | 37,289 | $4.37M | 0.32% | +37,289 | New |
| PEAK6 Investments LLC | 37,124 | $4.35M | 0.19% | +7,404+24.9% | Added |
| Simplify Asset Management Inc. | 36,916 | $4.33M | 0.67% | +36,916 | New |
| DekaBank Deutsche Girozentrale | 35,900 | $4.20M | 0.01% | +970+2.8% | Added |
| Moran Wealth Management, LLC | 35,748 | $4.19M | 0.15% | +991+2.9% | Added |
| NS Partners Ltd | 35,618 | $4.17M | 0.20% | −5,899−14.2% | Reduced |
| British Columbia Investment Management Corp | 35,000 | $4.10M | 0.03% | −12,000−25.5% | Reduced |
| Gabelli Funds LLC | 33,000 | $3.87M | 0.03% | 00.0% | Unchanged |
| Great West Life Assurance Co | 32,570 | $3.81M | 0.01% | +51+0.2% | Added |
| South Dakota Investment Council | 32,447 | $3.80M | 0.08% | 00.0% | Unchanged |
| UBS Group AG | 32,124 | $3.77M | 0.00% | −15,944−33.2% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 31,513 | $3.69M | 0.01% | +6,715+27.1% | Added |
| Collaborative Holdings Management LP | 31,009 | $3.63M | 11.08% | +31,009 | New |
| Amalgamated Bank | 30,390 | $3.56M | 0.03% | −1,535−4.8% | Reduced |