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, Q2 2026
Institutional positions in Masimo Corp as of Jun 30, 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, and 13F filings after Q1 2026 list far fewer holders. See Q1 2026
- Institutional holders
- 2
- −445 vs. Q1 2026
- Shares held
- 90
- −54.5M (−100.0%) vs. Q1 2026
- Total value
- $16.2K
- −$9.66B (−100.0%) vs. Q1 2026
- New holders
- 0
- 0 more added
- Sold out
- 445
- 2 more reduced
4 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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, Q2 2026
Shares, value and share of portfolio for each institution holding Masimo Corp; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| IFP Advisors, Inc | 88 | $15.8K | 0.00% | −629−87.7% | Reduced |
| Huntington National Bank | 2 | $360 | 0.00% | −2,249−99.9% | Reduced |
| BlackRock, Inc. | 0 | $0 | 0.00% | −4,644,578−100.0% | Sold out |
| Politan Capital Management LP | 0 | $0 | 0.00% | −4,589,648−100.0% | Sold out |
| Pentwater Capital Management LP | 0 | $0 | 0.00% | −3,176,000−100.0% | Sold out |
| Barclays PLC | 0 | $0 | 0.00% | −2,743,985−100.0% | Sold out |
| HBK Investments L P | 0 | $0 | 0.00% | −2,576,109−100.0% | Sold out |
| Massachusetts Financial Services Co | 0 | $0 | 0.00% | −2,342,790−100.0% | Sold out |
| Vanguard Capital Management LLC | 0 | $0 | 0.00% | −2,050,045−100.0% | Sold out |
| Vanguard Portfolio Management LLC | 0 | $0 | 0.00% | −2,006,861−100.0% | Sold out |
| FMR LLC | 0 | $0 | 0.00% | −1,450,823−100.0% | Sold out |
| State Street Corp | 0 | $0 | 0.00% | −1,437,724−100.0% | Sold out |
| Millennium Management LLC | 0 | $0 | 0.00% | −988,853−100.0% | Sold out |
| Goldman Sachs Group Inc | 0 | $0 | 0.00% | −984,192−100.0% | Sold out |
| Geode Capital Management, LLC | 0 | $0 | 0.00% | −956,736−100.0% | Sold out |
| AQR Capital Management LLC | 0 | $0 | 0.00% | −831,966−100.0% | Sold out |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −770,986−100.0% | Sold out |
| Morgan Stanley | 0 | $0 | 0.00% | −752,417−100.0% | Sold out |
| Davidson Kempner Capital Management LP | 0 | $0 | 0.00% | −585,988−100.0% | Sold out |
| JPMorgan Chase & Co | 0 | $0 | 0.00% | −572,645−100.0% | Sold out |
| Citigroup Inc | 0 | $0 | 0.00% | −533,388−100.0% | Sold out |
| SG Americas Securities, LLC | 0 | $0 | 0.00% | −522,824−100.0% | Sold out |
| FIL Ltd | 0 | $0 | 0.00% | −482,000−100.0% | Sold out |
| Vivaldi Asset Management, LLC | 0 | $0 | 0.00% | −479,403−100.0% | Sold out |
| HSBC Holdings PLC | 0 | $0 | 0.00% | −473,434−100.0% | Sold out |
| UBS Group AG | 0 | $0 | 0.00% | −468,257−100.0% | Sold out |
| Magnetar Financial LLC | 0 | $0 | 0.00% | −427,081−100.0% | Sold out |
| CNH Partners LLC | 0 | $0 | 0.00% | −416,956−100.0% | Sold out |
| O'Connor Alternative Investments LLC | 0 | $0 | 0.00% | −412,903−100.0% | Sold out |
| Neuberger Berman Group LLC | 0 | $0 | 0.00% | −403,309−100.0% | Sold out |
| Northern Trust Corp | 0 | $0 | 0.00% | −390,437−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −389,359−100.0% | Sold out |
| Charles Schwab Investment Management Inc | 0 | $0 | 0.00% | −386,898−100.0% | Sold out |
| Capital Research Global Investors | 0 | $0 | 0.00% | −359,058−100.0% | Sold out |
| Gotham Asset Management, LLC | 0 | $0 | 0.00% | −341,468−100.0% | Sold out |
| Westfield Capital Management Co LP | 0 | $0 | 0.00% | −341,229−100.0% | Sold out |
| Alliancebernstein L.P. | 0 | $0 | 0.00% | −455,354−100.0% | Sold out |
| Hudson Bay Capital Management LP | 0 | $0 | 0.00% | −330,679−100.0% | Sold out |
| CI Private Wealth, LLC | 0 | $0 | 0.00% | −321,600−100.0% | Sold out |
| Fort Baker Capital Management LP | 0 | $0 | 0.00% | −312,720−100.0% | Sold out |
| Highland Capital Management Fund Advisors, L.P. | 0 | $0 | 0.00% | −310,130−100.0% | Sold out |
| Capitolis Liquid Global Markets LLC | 0 | $0 | 0.00% | −309,102−100.0% | Sold out |
| Bank of New York Mellon Corp | 0 | $0 | 0.00% | −306,400−100.0% | Sold out |
| Qube Research & Technologies Ltd | 0 | $0 | 0.00% | −291,481−100.0% | Sold out |
| Vanguard Fiduciary Trust Co | 0 | $0 | 0.00% | −289,867−100.0% | Sold out |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −281,366−100.0% | Sold out |
| Whitebox Advisors LLC | 0 | $0 | 0.00% | −270,001−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −264,837−100.0% | Sold out |
| Nuance Investments, LLC | 0 | $0 | 0.00% | −244,704−100.0% | Sold out |
| Amundi | 0 | $0 | 0.00% | −243,143−100.0% | Sold out |
| Slotnik Capital, LLC | 0 | $0 | 0.00% | −240,300−100.0% | Sold out |
| Renaissance Technologies LLC | 0 | $0 | 0.00% | −239,500−100.0% | Sold out |
| Polar Asset Management Partners Inc. | 0 | $0 | 0.00% | −232,026−100.0% | Sold out |
| Bank of America Corp | 0 | $0 | 0.00% | −232,003−100.0% | Sold out |
| MUFG Securities EMEA plc | 0 | $0 | 0.00% | −225,400−100.0% | Sold out |
| Beryl Capital Management LLC | 0 | $0 | 0.00% | −217,103−100.0% | Sold out |
| Canada Pension Plan Investment Board | 0 | $0 | 0.00% | −209,500−100.0% | Sold out |
| Erste Asset Management GmbH | 0 | $0 | 0.00% | −200,000−100.0% | Sold out |
| Water Island Capital LLC | 0 | $0 | 0.00% | −194,197−100.0% | Sold out |
| Alpine Associates Management Inc. | 0 | $0 | 0.00% | −189,000−100.0% | Sold out |
| American Century Companies Inc | 0 | $0 | 0.00% | −188,073−100.0% | Sold out |
| Arrowstreet Capital, Limited Partnership | 0 | $0 | 0.00% | −172,588−100.0% | Sold out |
| Readystate Asset Management LP | 0 | $0 | 0.00% | −171,115−100.0% | Sold out |
| Raymond James Financial Inc | 0 | $0 | 0.00% | −170,527−100.0% | Sold out |
| Man Group plc | 0 | $0 | 0.00% | −166,235−100.0% | Sold out |
| Dimensional Fund Advisors LP | 0 | $0 | 0.00% | −164,402−100.0% | Sold out |
| Glazer Capital, LLC | 0 | $0 | 0.00% | −157,858−100.0% | Sold out |
| Woodline Partners LP | 0 | $0 | 0.00% | −153,234−100.0% | Sold out |
| Bank of Nova Scotia | 0 | $0 | 0.00% | −152,584−100.0% | Sold out |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −143,884−100.0% | Sold out |
| Capula Management Ltd | 0 | $0 | 0.00% | −142,800−100.0% | Sold out |
| Champlain Investment Partners, LLC | 0 | $0 | 0.00% | −141,284−100.0% | Sold out |
| Westchester Capital Management, LLC | 0 | $0 | 0.00% | −138,428−100.0% | Sold out |
| Grantham, Mayo, Van Otterloo & Co. LLC | 0 | $0 | 0.00% | −137,617−100.0% | Sold out |
| TIG Advisors, LLC | 0 | $0 | 0.00% | −135,197−100.0% | Sold out |
| UBS Asset Management Americas Inc | 0 | $0 | 0.00% | −133,689−100.0% | Sold out |
| Rhumbline Advisers | 0 | $0 | 0.00% | −129,619−100.0% | Sold out |
| Gabelli Funds LLC | 0 | $0 | 0.00% | −126,082−100.0% | Sold out |
| GW&K Investment Management, LLC | 0 | $0 | 0.00% | −122,781−100.0% | Sold out |
| Sagefield Capital LP | 0 | $0 | 0.00% | −122,240−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −117,297−100.0% | Sold out |
| Winton Group Ltd | 0 | $0 | 0.00% | −112,783−100.0% | Sold out |
| Weiss Asset Management LP | 0 | $0 | 0.00% | −112,600−100.0% | Sold out |
| Nuveen, LLC | 0 | $0 | 0.00% | −111,542−100.0% | Sold out |
| Nomura Holdings Inc | 0 | $0 | 0.00% | −109,390−100.0% | Sold out |
| Blackstone Group Inc. | 0 | $0 | 0.00% | −109,383−100.0% | Sold out |
| Principal Financial Group Inc | 0 | $0 | 0.00% | −102,718−100.0% | Sold out |
| Soros Fund Management LLCSuperinvestorSoros Fund Management | 0 | $0 | 0.00% | −100,838−100.0% | Sold out |
| Kryger Capital LLC | 0 | $0 | 0.00% | −100,589−100.0% | Sold out |
| Schroder Investment Management Group | 0 | $0 | 0.00% | −96,179−100.0% | Sold out |
| Gamco Investors, Inc. Et Al | 0 | $0 | 0.00% | −92,000−100.0% | Sold out |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −90,657−100.0% | Sold out |
| Swiss National Bank | 0 | $0 | 0.00% | −90,300−100.0% | Sold out |
| Deutsche Bank AG | 0 | $0 | 0.00% | −89,387−100.0% | Sold out |
| Gabelli & Co Investment Advisers, Inc. | 0 | $0 | 0.00% | −88,650−100.0% | Sold out |
| California Public Employees Retirement System | 0 | $0 | 0.00% | −77,397−100.0% | Sold out |
| Voloridge Investment Management, LLC | 0 | $0 | 0.00% | −70,000−100.0% | Sold out |
| Invesco Ltd. | 0 | $0 | 0.00% | −69,144−100.0% | Sold out |
| Healthcare of Ontario Pension Plan Trust Fund | 0 | $0 | 0.00% | −67,600−100.0% | Sold out |
| Verition Fund Management LLC | 0 | $0 | 0.00% | −66,853−100.0% | Sold out |