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 2026
Institutional positions in Masimo Corp as of Mar 31, 2026. 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
MASI is no longer listed, so this page shows Q1 2026. 13F filings for later quarters list far fewer holders.
- Institutional holders
- 451
- +65 vs. Q4 2025
- Shares held
- 54.6M
- +4.00M (+7.9%) vs. Q4 2025
- Total value
- $9.69B
- +$3.10B (+47.2%) vs. Q4 2025
- New holders
- 136
- 140 more added
- Sold out
- 71
- 107 more reduced
6 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: 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 2026
Shares, value and share of portfolio for each institution holding Masimo Corp; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Coldstream Capital Management Inc | 3,683 | $655.1K | 0.01% | +720+24.3% | Added |
| Eukles Asset Management | 3,722 | $662.0K | 0.30% | −628−14.4% | Reduced |
| ProShare Advisors LLC | 3,917 | $696.7K | 0.00% | +2,087+114.0% | Added |
| US Bancorp | 3,933 | $699.6K | 0.00% | +169+4.5% | Added |
| Neo Ivy Capital Management | 4,045 | $719.5K | 0.19% | +4,045 | New |
| Quadrant Capital Group LLC | 4,122 | $733.2K | 0.02% | +376+10.0% | Added |
| New Age Alpha Advisors, LLC | 4,135 | $735.5K | 0.03% | −103−2.4% | Reduced |
| Evergreen Capital Management LLC | 4,149 | $738.0K | 0.02% | +4,149 | New |
| Private Advisor Group, LLC | 4,211 | $749.0K | 0.00% | −14−0.3% | Reduced |
| Russell Investments Group, Ltd. | 4,363 | $776.0K | 0.00% | −270−5.8% | Reduced |
| Voya Investment Management LLC | 4,399 | $782.5K | 0.00% | −14−0.3% | Reduced |
| Franklin Resources Inc | 4,436 | $789.0K | 0.00% | +52+1.2% | Added |
| Mirabella Financial Services LLP | 4,458 | $792.9K | 0.08% | +2,907+187.4% | Added |
| Wolverine Asset Management LLC | 4,549 | $809.1K | 0.01% | +4,549 | New |
| State of Alaska, Department of Revenue | 4,602 | $818.0K | 0.01% | 00.0% | Unchanged |
| Public Employees Retirement Association of Colorado | 4,685 | $833.0K | 0.00% | 00.0% | Unchanged |
| Diversified Trust Co | 4,685 | $833.3K | 0.02% | +4,685 | New |
| Commerce Bank | 4,731 | $841.5K | 0.00% | −13,145−73.5% | Reduced |
| Prelude Capital Management, LLC | 4,732 | $841.7K | 0.06% | +4,732 | New |
| Fieldview Capital Management, LLC | 4,784 | $850.9K | 0.25% | +4,784 | New |
| HighTower Advisors, LLC | 5,024 | $893.6K | 0.00% | +1,277+34.1% | Added |
| The PNC Financial Services Group, Inc. | 5,107 | $908.4K | 0.00% | −2,180−29.9% | Reduced |
| Brighton Jones LLC | 5,281 | $939.3K | 0.02% | +5,281 | New |
| B.O.S.S. Retirement Advisors, LLC | 5,337 | $949.3K | 0.29% | 00.0% | Unchanged |
| Bryn Mawr Trust Co | 5,370 | $955.2K | 0.02% | −2,654−33.1% | Reduced |
| Bank of Montreal | 5,629 | $1.00M | 0.00% | +653+13.1% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 5,695 | $1.01M | 0.00% | −117−2.0% | Reduced |
| Redwood Investment Management, LLC | 5,835 | $1.04M | 0.13% | −2,600−30.8% | Reduced |
| Teacher Retirement System of Texas | 5,921 | $1.05M | 0.00% | +5,921 | New |
| Versor Investments LP | 6,058 | $1.08M | 2.64% | +2,494+70.0% | Added |
| Merit Financial Group, LLC | 6,097 | $1.08M | 0.01% | +3,116+104.5% | Added |
| Captrust Financial Advisors | 6,106 | $1.09M | 0.00% | +2,254+58.5% | Added |
| Navellier & Associates Inc | 6,310 | $1.12M | 0.12% | 00.0% | Unchanged |
| Headlands Technologies LLC | 6,600 | $1.17M | 0.13% | +4,250+180.9% | Added |
| SummitTX Capital, L.P. | 7,000 | $1.25M | 0.04% | +5,397+336.7% | Added |
| Pictet Asset Management Holding SA | 7,020 | $1.25M | 0.00% | +480+7.3% | Added |
| State of Wisconsin Investment Board | 7,189 | $1.28M | 0.00% | −12,301−63.1% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 7,201 | $1.28M | 0.00% | +5,590+347.0% | Added |
| Colony Group, LLC | 7,247 | $1.29M | 0.00% | +1,773+32.4% | Added |
| Pathstone Holdings, LLC | 7,386 | $1.31M | 0.01% | +279+3.9% | Added |
| Pacer Advisors, Inc. | 7,618 | $1.35M | 0.00% | +258+3.5% | Added |
| Illinois Municipal Retirement Fund | 7,626 | $1.36M | 0.02% | −3,733−32.9% | Reduced |
| Victory Capital Management Inc | 7,708 | $1.37M | 0.00% | −2,128−21.6% | Reduced |
| De Burlo Group Inc | 7,802 | $1.39M | 0.31% | −150−1.9% | Reduced |
| Jump Financial, LLC | 7,836 | $1.39M | 0.02% | −5,117−39.5% | Reduced |
| Odyssean, LLC | 7,845 | $1.40M | 0.51% | +7,845 | New |
| Allstate Corp | 7,898 | $1.40M | 0.02% | +7,898 | New |
| Rockefeller Capital Management L.P. | 7,970 | $1.42M | 0.00% | −78,441−90.8% | Reduced |
| LPL Financial LLC | 8,355 | $1.49M | 0.00% | +843+11.2% | Added |
| Ameritas Investment Partners, Inc. | 8,411 | $1.50M | 0.05% | −4,861−36.6% | Reduced |
| Bellevue Group AG | 8,753 | $1.56M | 0.04% | −88,532−91.0% | Reduced |
| Oregon Public Employees Retirement Fund | 9,374 | $1.67M | 0.02% | +300+3.3% | Added |
| New Mexico Educational Retirement Board | 9,900 | $1.76M | 0.05% | 00.0% | Unchanged |
| Xponance, Inc. | 9,958 | $1.77M | 0.01% | +1,220+14.0% | Added |
| Moore Capital Management, LP | 10,020 | $1.78M | 0.06% | +10,020 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 10,187 | $1.81M | 0.00% | −3,350−24.7% | Reduced |
| Northwestern Mutual Investment Management Company, LLC | 10,228 | $1.82M | 0.03% | +13+0.1% | Added |
| JustInvest LLC | 10,251 | $1.82M | 0.02% | +2,728+36.3% | Added |
| Lockerman Financial Group, Inc. | 10,500 | $1.87M | 3.36% | −1,300−11.0% | Reduced |
| Brevan Howard Capital Management LP | 10,628 | $1.89M | 0.02% | +10,628 | New |
| KLP Kapitalforvaltning AS | 10,900 | $1.94M | 0.01% | +300+2.8% | Added |
| BNP Paribas Arbitrage, SA | 10,993 | $1.96M | 0.00% | +3,464+46.0% | Added |
| State of Michigan Retirement System | 10,996 | $1.96M | 0.01% | +200+1.9% | Added |
| Harvest Management LLC | 11,000 | $1.96M | 1.04% | +11,000 | New |
| Occudo Quantitative Strategies LP | 11,269 | $2.01M | 0.11% | +1,606+16.6% | Added |
| Wells Fargo & Company | 11,337 | $2.02M | 0.00% | −7,360−39.4% | Reduced |
| Paradigm Capital Management Inc | 11,353 | $2.02M | 0.08% | 00.0% | Unchanged |
| Vanguard Investments Australia, Ltd. | 11,498 | $2.05M | 0.01% | +11,498 | New |
| Fifth Third Bancorp | 11,736 | $2.09M | 0.00% | +11,159+1,934.0% | Added |
| Mint Tower Capital Management B.V. | 12,000 | $2.13M | 0.21% | +12,000 | New |
| Advisors Asset Management, Inc. | 12,080 | $2.15M | 0.04% | −7,778−39.2% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 12,140 | $2.16M | 0.00% | +2,442+25.2% | Added |
| Oxford Asset Management LLP | 12,202 | $2.17M | 0.88% | +12,202 | New |
| Alpine Global Management, LLC | 12,500 | $2.22M | 0.34% | +12,500 | New |
| Arizona State Retirement System | 12,541 | $2.23M | 0.01% | −277−2.2% | Reduced |
| Envestnet Asset Management Inc | 12,596 | $2.24M | 0.00% | −4,379−25.8% | Reduced |
| Skandinaviska Enskilda Banken AB (publ) | 12,978 | $2.31M | 0.05% | +12,978 | New |
| SEI Investments Co | 13,195 | $2.35M | 0.00% | +5,480+71.0% | Added |
| Louisiana State Employees Retirement System | 13,200 | $2.35M | 0.04% | +600+4.8% | Added |
| Public Employees Retirement System of Ohio | 13,446 | $2.39M | 0.01% | −433−3.1% | Reduced |
| Yousif Capital Management, LLC | 13,868 | $2.47M | 0.03% | −660−4.5% | Reduced |
| State of Tennessee, Treasury Department | 13,918 | $2.48M | 0.01% | 00.0% | Unchanged |
| Empower Advisory Group, LLC | 14,105 | $2.51M | 0.01% | +1,000+7.6% | Added |
| Baird Financial Group, Inc. | 14,192 | $2.52M | 0.00% | −16,487−53.7% | Reduced |
| Intech Investment Management LLC | 14,216 | $2.53M | 0.02% | −10,549−42.6% | Reduced |
| Wealth Enhancement Advisory Services, LLC | 16,837 | $2.56M | 0.01% | +5,466+48.1% | Added |
| Handelsbanken Fonder AB | 14,730 | $2.62M | 0.01% | 00.0% | Unchanged |
| Brown Advisory Inc | 14,734 | $2.62M | 0.00% | −120−0.8% | Reduced |
| Teachers Retirement System of the State of Kentucky | 14,771 | $2.63M | 0.02% | 00.0% | Unchanged |
| ADAR1 Capital Management, LLC | 15,000 | $2.67M | 0.16% | 00.0% | Unchanged |
| P Schoenfeld Asset Management LP | 15,000 | $2.67M | 2.12% | +15,000 | New |
| ExodusPoint Capital Management, LP | 15,979 | $2.84M | 0.03% | +6,594+70.3% | Added |
| LMR Partners LLP | 16,300 | $2.90M | 0.03% | +16,300 | New |
| State of New Jersey Common Pension Fund D | 16,320 | $2.90M | 0.01% | −332−2.0% | Reduced |
| Mutual of America Capital Management LLC | 17,496 | $3.11M | 0.04% | −1,505−7.9% | Reduced |
| South Dakota Investment Council | 17,568 | $3.13M | 0.06% | −3,700−17.4% | Reduced |
| Mercer Global Advisors Inc | 18,139 | $3.23M | 0.00% | +7,277+67.0% | Added |
| Vanguard Global Advisers, LLC | 18,433 | $3.28M | 0.00% | +18,433 | New |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 18,940 | $3.37M | 0.02% | +7,515+65.8% | Added |
| Treasurer of the State of North Carolina | 19,294 | $3.43M | 0.01% | +408+2.2% | Added |