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, Q3 2023
Institutional positions in Masimo Corp as of Sep 30, 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
- 357
- −57 vs. Q2 2023
- Shares held
- 47.7M
- +1.72M (+3.7%) vs. Q2 2023
- Total value
- $4.18B
- −$3.38B (−44.7%) vs. Q2 2023
- New holders
- 59
- 81 more added
- Sold out
- 116
- 158 more reduced
1 institution that held it in Q2 2023 haven't filed for Q3 2023 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2023
Shares, value and share of portfolio for each institution holding Masimo Corp; share changes are against Q2 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock Inc. | 5,412,333 | $474.6M | 0.01% | −707,790−11.6% | Reduced |
| FMR LLC | 5,247,563 | $460.1M | 0.04% | −1,909,714−26.7% | Reduced |
| Vanguard Group Inc | 4,754,870 | $416.9M | 0.01% | −100,399−2.1% | Reduced |
| Politan Capital Management LP | 4,713,518 | $413.3M | 28.00% | 00.0% | Unchanged |
| Capital Research Global Investors | 2,132,572 | $187.0M | 0.05% | +480,048+29.0% | Added |
| Massachusetts Financial Services Co | 1,513,449 | $132.7M | 0.05% | +1,513,449 | New |
| RTW Investments, LP | 1,501,493 | $131.7M | 2.78% | 00.0% | Unchanged |
| State Street Corp | 1,403,208 | $123.0M | 0.01% | −261,578−15.7% | Reduced |
| Eminence Capital, LP | 1,036,253 | $90.9M | 1.80% | +1,036,253 | New |
| T. Rowe Price Investment Management, Inc. | 917,526 | $80.4M | 0.06% | +399,518+77.1% | Added |
| Liontrust Investment Partners LLP | 906,438 | $79.5M | 1.27% | −13,968−1.5% | Reduced |
| Jackson Square Partners, LLC | 861,708 | $75.6M | 2.52% | +735,168+581.0% | Added |
| Geode Capital Management, LLC | 699,753 | $61.4M | 0.01% | −58,853−7.8% | Reduced |
| Sachem Head Capital Management LP | 634,100 | $55.6M | 2.80% | +634,100 | New |
| Westfield Capital Management Co LP | 603,681 | $52.9M | 0.36% | −350,118−36.7% | Reduced |
| Hawk Ridge Capital Management LP | 567,765 | $49.8M | 2.45% | +314,763+124.4% | Added |
| Schroder Investment Management Group | 549,676 | $48.2M | 0.07% | −93,379−14.5% | Reduced |
| Morgan Stanley | 501,904 | $44.0M | 0.00% | +231,202+85.4% | Added |
| Martin Currie Ltd | 495,910 | $43.5M | 1.56% | −6,153−1.2% | Reduced |
| Price T Rowe Associates Inc | 451,939 | $39.6M | 0.01% | +431,836+2,148.1% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 405,317 | $35.5M | 0.03% | −84,790−17.3% | Reduced |
| MIG Capital, LLC | 398,932 | $35.0M | 6.48% | +266,682+201.6% | Added |
| Bank of New York Mellon Corp | 390,623 | $34.2M | 0.01% | −106,548−21.4% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 385,416 | $33.8M | 0.10% | −8,491−2.2% | Reduced |
| Ensemble Capital Management, LLC | 368,040 | $32.3M | 3.33% | +76,929+26.4% | Added |
| Charles Schwab Investment Management Inc | 347,522 | $30.5M | 0.01% | −9,612−2.7% | Reduced |
| Northern Trust Corp | 333,776 | $29.3M | 0.01% | −83,768−20.1% | Reduced |
| ArrowMark Colorado Holdings LLC | 302,851 | $26.6M | 0.32% | +302,851 | New |
| HBK Investments L P | 295,000 | $25.9M | 0.57% | +295,000 | New |
| Dimensional Fund Advisors LP | 285,446 | $25.0M | 0.01% | +29,997+11.7% | Added |
| Clearline Capital LP | 275,649 | $24.2M | 2.39% | +275,649 | New |
| First Republic Investment Management, Inc. | 261,856 | $23.0M | 0.07% | −713−0.3% | Reduced |
| Citadel Advisors LLC | 256,692 | $22.5M | 0.02% | +217,158+549.3% | Added |
| Balyasny Asset Management LLC | 250,428 | $22.0M | 0.06% | +193,634+340.9% | Added |
| Millennium Management LLC | 241,201 | $21.1M | 0.02% | +22,219+10.1% | Added |
| Farallon Capital Management, L.L.C. | 227,649 | $20.0M | 0.11% | −140,000−38.1% | Reduced |
| Susquehanna International Group, LLP | 211,632 | $18.6M | 0.03% | +200,638+1,825.0% | Added |
| Glenview Capital Management, LLC | 208,848 | $18.3M | 0.50% | +208,848 | New |
| Legal & General Group Plc | 201,679 | $17.7M | 0.01% | −100,917−33.4% | Reduced |
| Raymond James & Associates | 201,652 | $17.7M | 0.01% | −63,840−24.0% | Reduced |
| Wolf Hill Capital Management, LP | 200,000 | $17.5M | 1.61% | +200,000 | New |
| Point72 Asset Management, L.P. | 186,644 | $16.4M | 0.06% | +52,321+39.0% | Added |
| SEI Investments Co | 183,940 | $16.1M | 0.03% | +127,249+224.5% | Added |
| Jane Street Group, LLC | 176,615 | $15.5M | 0.02% | +175,106+11,604.1% | Added |
| Federated Hermes, Inc. | 169,635 | $14.9M | 0.04% | +3,400+2.0% | Added |
| Principal Financial Group Inc | 165,787 | $14.5M | 0.01% | −18,604−10.1% | Reduced |
| Retirement Systems of Alabama | 144,598 | $12.7M | 0.06% | −7,179−4.7% | Reduced |
| Rhumbline Advisers | 142,529 | $12.5M | 0.01% | −16,455−10.4% | Reduced |
| Hudson Bay Capital Management LP | 142,524 | $12.5M | 0.12% | +142,524 | New |
| Montanaro Asset Management Ltd | 142,250 | $12.5M | 2.19% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 133,719 | $11.7M | 0.05% | −18,290−12.0% | Reduced |
| BNP Paribas Arbitrage, SA | 127,742 | $11.2M | 0.02% | +108,297+556.9% | Added |
| FIL Ltd | 117,470 | $10.3M | 0.01% | +117,470 | New |
| ExodusPoint Capital Management, LP | 116,609 | $10.2M | 0.13% | +109,041+1,440.8% | Added |
| First Trust Advisors LP | 104,844 | $9.19M | 0.01% | −74,431−41.5% | Reduced |
| UBS Asset Management Americas Inc | 101,158 | $8.87M | 0.00% | −72,818−41.9% | Reduced |
| Invesco Ltd. | 99,962 | $8.76M | 0.00% | +6,922+7.4% | Added |
| Swiss National Bank | 98,600 | $8.65M | 0.01% | −62,200−38.7% | Reduced |
| Comerica Bank | 96,414 | $8.45M | 0.04% | +96,414 | New |
| Nuveen Asset Management, LLC | 94,213 | $8.26M | 0.00% | −33,803−26.4% | Reduced |
| JPMorgan Chase & Co | 91,875 | $8.06M | 0.00% | −143,975−61.0% | Reduced |
| Baillie Gifford & Co | 91,229 | $8.00M | 0.01% | −3,920−4.1% | Reduced |
| Cubist Systematic Strategies, LLC | 89,923 | $7.88M | 0.10% | +89,523+22,380.8% | Added |
| Goldman Sachs Group Inc | 84,938 | $7.45M | 0.00% | +16,996+25.0% | Added |
| Gamco Investors, Inc. Et Al | 84,500 | $7.41M | 0.09% | 00.0% | Unchanged |
| California Public Employees Retirement System | 83,295 | $7.30M | 0.01% | −9,576−10.3% | Reduced |
| Ameriprise Financial Inc | 74,054 | $6.49M | 0.00% | −30,936−29.5% | Reduced |
| Boussard & Gavaudan Investment Management LLP | 70,723 | $6.33M | 0.74% | +70,723 | New |
| TD Asset Management Inc | 71,430 | $6.26M | 0.01% | +53,676+302.3% | Added |
| Woodline Partners LP | 70,779 | $6.21M | 0.07% | +70,779 | New |
| Voloridge Investment Management, LLC | 67,795 | $5.94M | 0.03% | +67,795 | New |
| Coronation Fund Managers Ltd. | 66,966 | $5.87M | 0.18% | +66,966 | New |
| American International Group, Inc. | 62,885 | $5.51M | 0.04% | −10,805−14.7% | Reduced |
| Alliancebernstein L.P. | 62,032 | $5.44M | 0.00% | −7,611−10.9% | Reduced |
| Manufacturers Life Insurance Company, The | 55,737 | $4.89M | 0.00% | +19,400+53.4% | Added |
| Bell Asset Management Ltd | 54,853 | $4.81M | 0.79% | +14,278+35.2% | Added |
| Twinbeech Capital LP | 54,361 | $4.77M | 0.09% | +54,361 | New |
| Citigroup Inc | 53,583 | $4.70M | 0.01% | −11,324−17.4% | Reduced |
| Bridgewater Associates, LP | 53,168 | $4.66M | 0.03% | −2,511−4.5% | Reduced |
| New York State Teachers Retirement System | 53,048 | $4.65M | 0.01% | −6,407−10.8% | Reduced |
| New York State Common Retirement Fund | 52,818 | $4.63M | 0.01% | −10,956−17.2% | Reduced |
| Bryn Mawr Trust Co | 52,307 | $4.59M | 0.20% | −326−0.6% | Reduced |
| Logan Capital Management Inc | 51,288 | $4.50M | 0.23% | −242−0.5% | Reduced |
| Simplex Trading, LLC | 50,689 | $4.44M | 0.16% | +46,724+1,178.4% | Added |
| California State Teachers Retirement System | 49,281 | $4.32M | 0.01% | −23,462−32.3% | Reduced |
| UBS Group AG | 48,068 | $4.21M | 0.00% | −33,518−41.1% | Reduced |
| Irenic Capital Management LP | 47,309 | $4.15M | 1.27% | +47,309 | New |
| State Board of Administration of Florida Retirement System | 47,206 | $4.14M | 0.01% | −6,727−12.5% | Reduced |
| British Columbia Investment Management Corp | 47,000 | $4.12M | 0.04% | −4,033−7.9% | Reduced |
| Credit Suisse AG | 42,689 | $3.74M | 0.00% | +3,332+8.5% | Added |
| NS Partners Ltd | 41,517 | $3.64M | 0.20% | −104−0.2% | Reduced |
| CenterBook Partners LP | 41,176 | $3.61M | 0.45% | +11,421+38.4% | Added |
| Prosight Management, LP | 40,000 | $3.51M | 1.11% | +40,000 | New |
| RK Capital Management, LLC | 38,580 | $3.38M | 0.80% | −415−1.1% | Reduced |
| Texas Permanent School Fund | 37,623 | $3.30M | 0.03% | −5,131−12.0% | Reduced |
| State of Tennessee, Treasury Department | 36,723 | $3.22M | 0.01% | +10,633+40.8% | Added |
| Royal Bank of Canada | 36,174 | $3.17M | 0.00% | −40,282−52.7% | Reduced |
| Point72 Middle East FZE | 35,912 | $3.15M | 0.19% | +35,912 | New |
| DekaBank Deutsche Girozentrale | 34,930 | $3.07M | 0.01% | +922+2.7% | Added |
| Moran Wealth Management, LLC | 34,757 | $3.05M | 0.12% | +1,097+3.3% | Added |