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 |
|---|---|---|---|---|---|
| Bellevue Group AG | 8,753 | $1.56M | 0.04% | −88,532−91.0% | Reduced |
| Ameritas Investment Partners, Inc. | 8,411 | $1.50M | 0.05% | −4,861−36.6% | Reduced |
| LPL Financial LLC | 8,355 | $1.49M | 0.00% | +843+11.2% | Added |
| Rockefeller Capital Management L.P. | 7,970 | $1.42M | 0.00% | −78,441−90.8% | Reduced |
| Allstate Corp | 7,898 | $1.40M | 0.02% | +7,898 | New |
| Odyssean, LLC | 7,845 | $1.40M | 0.51% | +7,845 | New |
| Jump Financial, LLC | 7,836 | $1.39M | 0.02% | −5,117−39.5% | Reduced |
| De Burlo Group Inc | 7,802 | $1.39M | 0.31% | −150−1.9% | Reduced |
| Victory Capital Management Inc | 7,708 | $1.37M | 0.00% | −2,128−21.6% | Reduced |
| Illinois Municipal Retirement Fund | 7,626 | $1.36M | 0.02% | −3,733−32.9% | Reduced |
| Pacer Advisors, Inc. | 7,618 | $1.35M | 0.00% | +258+3.5% | Added |
| Pathstone Holdings, LLC | 7,386 | $1.31M | 0.01% | +279+3.9% | Added |
| Colony Group, LLC | 7,247 | $1.29M | 0.00% | +1,773+32.4% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 7,201 | $1.28M | 0.00% | +5,590+347.0% | Added |
| State of Wisconsin Investment Board | 7,189 | $1.28M | 0.00% | −12,301−63.1% | Reduced |
| Pictet Asset Management Holding SA | 7,020 | $1.25M | 0.00% | +480+7.3% | Added |
| SummitTX Capital, L.P. | 7,000 | $1.25M | 0.04% | +5,397+336.7% | Added |
| Headlands Technologies LLC | 6,600 | $1.17M | 0.13% | +4,250+180.9% | Added |
| Navellier & Associates Inc | 6,310 | $1.12M | 0.12% | 00.0% | Unchanged |
| Captrust Financial Advisors | 6,106 | $1.09M | 0.00% | +2,254+58.5% | Added |
| Merit Financial Group, LLC | 6,097 | $1.08M | 0.01% | +3,116+104.5% | Added |
| Versor Investments LP | 6,058 | $1.08M | 2.64% | +2,494+70.0% | Added |
| Teacher Retirement System of Texas | 5,921 | $1.05M | 0.00% | +5,921 | New |
| Redwood Investment Management, LLC | 5,835 | $1.04M | 0.13% | −2,600−30.8% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 5,695 | $1.01M | 0.00% | −117−2.0% | Reduced |
| Bank of Montreal | 5,629 | $1.00M | 0.00% | +653+13.1% | Added |
| Bryn Mawr Trust Co | 5,370 | $955.2K | 0.02% | −2,654−33.1% | Reduced |
| B.O.S.S. Retirement Advisors, LLC | 5,337 | $949.3K | 0.29% | 00.0% | Unchanged |
| Brighton Jones LLC | 5,281 | $939.3K | 0.02% | +5,281 | New |
| The PNC Financial Services Group, Inc. | 5,107 | $908.4K | 0.00% | −2,180−29.9% | Reduced |
| HighTower Advisors, LLC | 5,024 | $893.6K | 0.00% | +1,277+34.1% | Added |
| Fieldview Capital Management, LLC | 4,784 | $850.9K | 0.25% | +4,784 | New |
| Prelude Capital Management, LLC | 4,732 | $841.7K | 0.06% | +4,732 | New |
| Commerce Bank | 4,731 | $841.5K | 0.00% | −13,145−73.5% | Reduced |
| Diversified Trust Co | 4,685 | $833.3K | 0.02% | +4,685 | New |
| Public Employees Retirement Association of Colorado | 4,685 | $833.0K | 0.00% | 00.0% | Unchanged |
| State of Alaska, Department of Revenue | 4,602 | $818.0K | 0.01% | 00.0% | Unchanged |
| Wolverine Asset Management LLC | 4,549 | $809.1K | 0.01% | +4,549 | New |
| Mirabella Financial Services LLP | 4,458 | $792.9K | 0.08% | +2,907+187.4% | Added |
| Franklin Resources Inc | 4,436 | $789.0K | 0.00% | +52+1.2% | Added |
| Voya Investment Management LLC | 4,399 | $782.5K | 0.00% | −14−0.3% | Reduced |
| Russell Investments Group, Ltd. | 4,363 | $776.0K | 0.00% | −270−5.8% | Reduced |
| Private Advisor Group, LLC | 4,211 | $749.0K | 0.00% | −14−0.3% | Reduced |
| Evergreen Capital Management LLC | 4,149 | $738.0K | 0.02% | +4,149 | New |
| New Age Alpha Advisors, LLC | 4,135 | $735.5K | 0.03% | −103−2.4% | Reduced |
| Quadrant Capital Group LLC | 4,122 | $733.2K | 0.02% | +376+10.0% | Added |
| Neo Ivy Capital Management | 4,045 | $719.5K | 0.19% | +4,045 | New |
| US Bancorp | 3,933 | $699.6K | 0.00% | +169+4.5% | Added |
| ProShare Advisors LLC | 3,917 | $696.7K | 0.00% | +2,087+114.0% | Added |
| Eukles Asset Management | 3,722 | $662.0K | 0.30% | −628−14.4% | Reduced |
| Coldstream Capital Management Inc | 3,683 | $655.1K | 0.01% | +720+24.3% | Added |
| Verus Capital Partners, LLC | 3,651 | $649.4K | 0.04% | 00.0% | Unchanged |
| M&T Bank Corp | 3,581 | $637.4K | 0.00% | +257+7.7% | Added |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 3,558 | $632.9K | 0.00% | +56+1.6% | Added |
| RMB Capital Management, LLC | 3,542 | $630.0K | 0.01% | +399+12.7% | Added |
| Oxford Financial Group Ltd | 3,430 | $610.1K | 0.03% | 00.0% | Unchanged |
| Securian Asset Management, Inc | 3,333 | $592.8K | 0.02% | 00.0% | Unchanged |
| Buckingham Strategic Partners | 3,296 | $586.2K | 0.01% | +3,296 | New |
| Canvas Wealth Advisors, LLC | 3,191 | $567.6K | 0.10% | +3,191 | New |
| Diametric Capital, LP | 3,100 | $551.4K | 0.14% | +3,100 | New |
| Integrated Wealth Concepts LLC | 3,077 | $547.3K | 0.00% | +3,077 | New |
| Federated Hermes, Inc. | 2,921 | $519.6K | 0.00% | −751−20.5% | Reduced |
| Swiss Life Asset Management Ltd | 2,812 | $500.2K | 0.00% | +639+29.4% | Added |
| Machina Capital S.A.S. | 2,761 | $491.1K | 0.10% | +2,761 | New |
| Royal Bank of Canada | 2,748 | $489.0K | 0.00% | −8,592−75.8% | Reduced |
| Federation des caisses Desjardins du Quebec | 2,739 | $487.2K | 0.00% | −918−25.1% | Reduced |
| 180 Wealth Advisors, LLC | 2,728 | $485.2K | 0.06% | +66+2.5% | Added |
| HB Wealth Management, LLC | 2,704 | $481.0K | 0.00% | +367+15.7% | Added |
| O'Shaughnessy Asset Management, LLC | 2,691 | $478.6K | 0.00% | +929+52.7% | Added |
| Blueshift Asset Management, LLC | 2,665 | $474.0K | 0.14% | +699+35.6% | Added |
| Buckhead Capital Management LLC | 2,650 | $471.4K | 0.18% | 00.0% | Unchanged |
| Crossmark Global Holdings, Inc. | 2,647 | $470.8K | 0.01% | +7+0.3% | Added |
| Allworth Financial LP | 2,594 | $461.3K | 0.00% | +899+53.0% | Added |
| Summit Trail Advisors, LLC | 2,551 | $453.7K | 0.01% | −9,145−78.2% | Reduced |
| Jones Financial Companies LLLP | 2,545 | $450.7K | 0.00% | +2,240+734.4% | Added |
| NorthCrest Asset Manangement, LLC | 2,516 | $449.3K | 0.01% | −617−19.7% | Reduced |
| KCM Investment Advisors LLC | 2,515 | $447.3K | 0.01% | 00.0% | Unchanged |
| CWM Advisors, LLC | 2,497 | $444.2K | 0.03% | +2,459+6,471.1% | Added |
| DnB Asset Management AS | 2,411 | $428.8K | 0.00% | +2,411 | New |
| Polymer Capital Management (US) LLC | 2,398 | $426.5K | 0.06% | −7,125−74.8% | Reduced |
| Utah Retirement Systems | 2,382 | $423.7K | 0.00% | 00.0% | Unchanged |
| Hardy Reed LLC | 2,381 | $423.5K | 0.03% | +209+9.6% | Added |
| Beese Fulmer Investment Management, Inc. | 2,360 | $419.8K | 0.03% | +358+17.9% | Added |
| Fiduciary Trust Co | 2,339 | $416.0K | 0.00% | 00.0% | Unchanged |
| Huntington National Bank | 2,251 | $400.4K | 0.00% | +2,171+2,713.8% | Added |
| Sentinus, LLC | 2,250 | $400.2K | 0.04% | +503+28.8% | Added |
| AlphaGrep UK Ltd | 2,199 | $391.1K | 0.12% | −1,458−39.9% | Reduced |
| Bull Harbor Capital LLC | 2,151 | $382.6K | 0.10% | +2,151 | New |
| Farther Finance Advisors, LLC | 2,118 | $377.0K | 0.00% | −26−1.2% | Reduced |
| Vident Advisory, LLC | 2,103 | $374.1K | 0.00% | +355+20.3% | Added |
| Assetmark, Inc | 2,068 | $367.8K | 0.00% | +218+11.8% | Added |
| Maryland State Retirement & Pension System | 2,028 | $360.7K | 0.01% | 00.0% | Unchanged |
| Skopos Labs, Inc. | 2,015 | $358.4K | 0.01% | +2,015 | New |
| Prudential Financial Inc | 1,955 | $347.7K | 0.00% | −3−0.2% | Reduced |
| Tower Research Capital LLC (TRC) | 1,919 | $341.3K | 0.01% | +717+59.7% | Added |
| Mission Wealth Management, LP | 1,905 | $338.8K | 0.01% | +20+1.1% | Added |
| Bridgewater Associates, LP | 1,899 | $337.8K | 0.00% | +280+17.3% | Added |
| Krilogy Financial LLC | 1,879 | $335.0K | 0.01% | −1,483−44.1% | Reduced |
| Two Sigma Securities, LLC | 1,875 | $333.5K | 0.04% | −836−30.8% | Reduced |
| Bessemer Group Inc | 1,857 | $331.0K | 0.00% | +1,716+1,217.0% | Added |