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 2024
Institutional positions in Masimo Corp as of Dec 31, 2024. 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
- 366
- +12 vs. Q3 2024
- Shares held
- 51.4M
- +1.55M (+3.1%) vs. Q3 2024
- Total value
- $8.50B
- +$1.86B (+28.0%) vs. Q3 2024
- New holders
- 62
- 117 more added
- Sold out
- 50
- 119 more reduced
8 institutions that held it in Q3 2024 haven't filed for Q4 2024 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2024: 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 2024
Shares, value and share of portfolio for each institution holding Masimo Corp; share changes are against Q3 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 8,698,213 | $1.44B | 0.03% | −124,056−1.4% | Reduced |
| FMR LLC | 8,097,454 | $1.34B | 0.08% | +1,340,836+19.8% | Added |
| Politan Capital Management LP | 4,714,746 | $779.3M | 50.51% | 00.0% | Unchanged |
| Vanguard Group Inc | 4,586,702 | $758.2M | 0.01% | +66,215+1.5% | Added |
| Capital Research Global Investors | 2,454,975 | $405.8M | 0.08% | +1,094,647+80.5% | Added |
| Massachusetts Financial Services Co | 1,735,167 | $286.8M | 0.09% | +943,001+119.0% | Added |
| T. Rowe Price Investment Management, Inc. | 1,662,376 | $274.8M | 0.17% | +135,888+8.9% | Added |
| State Street Corp | 1,463,466 | $241.9M | 0.01% | +24,652+1.7% | Added |
| Alliancebernstein L.P. | 947,391 | $156.6M | 0.05% | +878,587+1,276.9% | Added |
| Holocene Advisors, LP | 835,660 | $138.1M | 0.45% | −39,499−4.5% | Reduced |
| Geode Capital Management, LLC | 801,125 | $132.5M | 0.01% | +8,239+1.0% | Added |
| Liontrust Investment Partners LLP | 792,935 | $131.1M | 1.90% | −15,758−1.9% | Reduced |
| Westfield Capital Management Co LP | 768,858 | $127.1M | 0.55% | −625,198−44.8% | Reduced |
| Morgan Stanley | 737,841 | $122.0M | 0.01% | +985+0.1% | Added |
| RTW Investments, LP | 683,294 | $112.9M | 1.71% | −779,106−53.3% | Reduced |
| Dimensional Fund Advisors LP | 647,720 | $107.1M | 0.03% | +50,022+8.4% | Added |
| Alyeska Investment Group, L.P. | 578,635 | $95.6M | 0.36% | −166,492−22.3% | Reduced |
| Schroder Investment Management Group | 566,469 | $95.5M | 0.09% | −166,152−22.7% | Reduced |
| Citadel Advisors LLC | 441,025 | $72.9M | 0.07% | +251,476+132.7% | Added |
| Millennium Management LLC | 408,058 | $67.5M | 0.06% | +378,805+1,294.9% | Added |
| Farallon Capital Management, L.L.C. | 397,000 | $65.6M | 0.35% | −861,563−68.5% | Reduced |
| Northern Trust Corp | 383,869 | $63.5M | 0.01% | +82,828+27.5% | Added |
| Charles Schwab Investment Management Inc | 377,836 | $62.5M | 0.01% | +7,808+2.1% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 373,705 | $61.8M | 0.04% | +1,522+0.4% | Added |
| CI Private Wealth, LLC | 347,683 | $57.5M | 0.10% | +343,797+8,847.1% | Added |
| Bank of New York Mellon Corp | 337,221 | $55.7M | 0.01% | −4,739−1.4% | Reduced |
| Bamco Inc | 307,144 | $50.8M | 0.13% | −40,056−11.5% | Reduced |
| Invesco Ltd. | 277,960 | $45.9M | 0.01% | +192,802+226.4% | Added |
| Price T Rowe Associates Inc | 250,786 | $41.5M | 0.00% | +181,070+259.7% | Added |
| Point72 Asset Management, L.P. | 248,499 | $41.1M | 0.11% | +248,499 | New |
| Cramer Rosenthal McGlynn LLC | 222,817 | $36.8M | 2.08% | +37,800+20.4% | Added |
| Assenagon Asset Management S.A. | 216,051 | $35.7M | 0.06% | +194,788+916.1% | Added |
| Ameriprise Financial Inc | 215,946 | $35.7M | 0.01% | +16,085+8.0% | Added |
| Raymond James Financial Inc | 203,971 | $33.7M | 0.01% | +203,971 | New |
| Goldman Sachs Group Inc | 202,252 | $33.4M | 0.01% | −129,824−39.1% | Reduced |
| UBS Asset Management Americas Inc | 190,246 | $31.4M | 0.01% | +77,775+69.2% | Added |
| UBS Group AG | 160,028 | $26.5M | 0.01% | +105,346+192.7% | Added |
| Comerica Bank | 141,378 | $23.4M | 0.09% | −103,703−42.3% | Reduced |
| Neuberger Berman Group LLC | 138,122 | $22.8M | 0.02% | +133,825+3,114.4% | Added |
| JPMorgan Chase & Co | 128,639 | $21.3M | 0.00% | −27,214−17.5% | Reduced |
| Gotham Asset Management, LLC | 127,780 | $21.1M | 0.20% | −25,706−16.7% | Reduced |
| Rhumbline Advisers | 124,373 | $20.6M | 0.02% | −2,641−2.1% | Reduced |
| Amundi | 111,481 | $18.8M | 0.01% | +87,446+363.8% | Added |
| FIL Ltd | 110,332 | $18.2M | 0.02% | +4,624+4.4% | Added |
| Bank of America Corp | 107,303 | $17.7M | 0.00% | −10,542−8.9% | Reduced |
| BLI - Banque de Luxembourg Investments | 101,200 | $17.1M | 0.46% | +101,200 | New |
| Principal Financial Group Inc | 102,660 | $17.0M | 0.01% | +153+0.1% | Added |
| Legal & General Group Plc | 97,187 | $16.1M | 0.00% | +3,122+3.3% | Added |
| Great Lakes Advisors, LLC | 95,730 | $15.8M | 0.14% | +95,730 | New |
| Citigroup Inc | 91,691 | $15.2M | 0.01% | +29,603+47.7% | Added |
| Rockefeller Capital Management L.P. | 90,901 | $15.0M | 0.04% | −46,492−33.8% | Reduced |
| Swiss National Bank | 89,400 | $14.8M | 0.01% | +1,100+1.2% | Added |
| Catalio Capital Management, LP | 87,377 | $14.4M | 3.16% | +87,377 | New |
| Toroso Investments, LLC | 86,731 | $14.3M | 0.12% | +84,342+3,530.4% | Added |
| TD Asset Management Inc | 84,640 | $14.0M | 0.01% | +38,332+82.8% | Added |
| Gamco Investors, Inc. Et Al | 84,500 | $14.0M | 0.15% | 00.0% | Unchanged |
| Erste Asset Management GmbH | 82,652 | $13.9M | 0.17% | +27,652+50.3% | Added |
| Nuveen Asset Management, LLC | 75,754 | $12.5M | 0.00% | −7,973−9.5% | Reduced |
| California Public Employees Retirement System | 70,229 | $11.6M | 0.01% | −3,084−4.2% | Reduced |
| Man Group plc | 64,889 | $10.7M | 0.03% | −335,056−83.8% | Reduced |
| Point72 (DIFC) Ltd | 58,417 | $9.66M | 0.87% | +58,417 | New |
| Walleye Capital LLC | 54,938 | $9.08M | 0.09% | +10,063+22.4% | Added |
| Retirement Systems of Alabama | 54,035 | $8.93M | 0.03% | −60,225−52.7% | Reduced |
| Barclays PLC | 53,219 | $8.80M | 0.00% | +13,262+33.2% | Added |
| Federated Hermes, Inc. | 52,734 | $8.72M | 0.02% | −65,881−55.5% | Reduced |
| Manufacturers Life Insurance Company, The | 51,457 | $8.51M | 0.01% | +14,931+40.9% | Added |
| Woodline Partners LP | 51,185 | $8.46M | 0.06% | +41,885+450.4% | Added |
| Corebridge Financial, Inc. | 50,536 | $8.35M | 0.05% | −1,930−3.7% | Reduced |
| Allspring Global Investments Holdings, LLC | 48,764 | $8.22M | 0.01% | +46,370+1,936.9% | Added |
| Logan Capital Management Inc | 47,787 | $7.90M | 0.33% | −2,565−5.1% | Reduced |
| Ace Management Global Ltd. | 47,694 | $7.88M | 100.00% | −917,810−95.1% | Reduced |
| First Trust Advisors LP | 47,328 | $7.82M | 0.01% | +41,952+780.4% | Added |
| Montanaro Asset Management Ltd | 46,500 | $7.69M | 1.59% | −9,200−16.5% | Reduced |
| New York State Teachers Retirement System | 45,248 | $7.48M | 0.02% | −200−0.4% | Reduced |
| State Board of Administration of Florida Retirement System | 42,861 | $7.08M | 0.01% | −40−0.1% | Reduced |
| NS Partners Ltd | 42,649 | $7.05M | 0.29% | −388−0.9% | Reduced |
| Picton Mahoney Asset Management | 42,610 | $7.04M | 0.27% | +28,153+194.7% | Added |
| LMR Partners LLP | 42,448 | $7.02M | 0.12% | +42,448 | New |
| California State Teachers Retirement System | 42,383 | $7.01M | 0.01% | −229−0.5% | Reduced |
| Two Sigma Investments, LP | 39,889 | $6.59M | 0.02% | −302,938−88.4% | Reduced |
| Great West Life Assurance Co | 37,560 | $6.20M | 0.01% | 00.0% | Unchanged |
| Gluskin Sheff & Assoc Inc | 37,061 | $6.13M | 0.73% | +22,636+156.9% | Added |
| Atika Capital Management LLC | 36,800 | $6.08M | 0.79% | +36,800 | New |
| Baird Financial Group, Inc. | 34,198 | $5.65M | 0.01% | +26,914+369.5% | Added |
| Norges Bank | 33,394 | $5.52M | 0.00% | −221,994−86.9% | Reduced |
| Gabelli Funds LLC | 33,000 | $5.45M | 0.04% | 00.0% | Unchanged |
| O'Shaughnessy Asset Management, LLC | 31,375 | $5.19M | 0.04% | +31,375 | New |
| Envestnet Asset Management Inc | 31,107 | $5.14M | 0.00% | +4,579+17.3% | Added |
| South Dakota Investment Council | 30,611 | $5.06M | 0.10% | 00.0% | Unchanged |
| Jane Street Group, LLC | 30,487 | $5.04M | 0.01% | +5,807+23.5% | Added |
| Royal Bank of Canada | 30,371 | $5.02M | 0.00% | +16,886+125.2% | Added |
| Zacks Investment Management | 27,229 | $4.50M | 0.04% | +671+2.5% | Added |
| SEI Investments Co | 26,601 | $4.40M | 0.01% | −1,481−5.3% | Reduced |
| Sterling Capital Management LLC | 26,221 | $4.33M | 0.06% | −14,718−36.0% | Reduced |
| MetLife Investment Management | 26,026 | $4.30M | 0.02% | +2,214+9.3% | Added |
| Westmount Partners, LLC | 25,991 | $4.30M | 1.31% | 00.0% | Unchanged |
| Intech Investment Management LLC | 25,622 | $4.24M | 0.04% | +16,178+171.3% | Added |
| ExodusPoint Capital Management, LP | 25,426 | $4.20M | 0.04% | +25,426 | New |
| Cinctive Capital Management LP | 25,176 | $4.16M | 0.22% | +25,176 | New |
| Bellevue Group AG | 24,166 | $3.99M | 0.08% | +24,166 | New |