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 2025
Institutional positions in Masimo Corp as of Mar 31, 2025. 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
- 393
- +31 vs. Q4 2024
- Shares held
- 54.2M
- +2.83M (+5.5%) vs. Q4 2024
- Total value
- $9.02B
- +$532.2M (+6.3%) vs. Q4 2024
- New holders
- 77
- 136 more added
- Sold out
- 46
- 118 more reduced
4 institutions that held it in Q4 2024 haven't filed for Q1 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2025
Shares, value and share of portfolio for each institution holding Masimo Corp; share changes are against Q4 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Montanaro Asset Management Ltd | 32,300 | $5.38M | 1.58% | −14,200−30.5% | Reduced |
| Intech Investment Management LLC | 32,494 | $5.41M | 0.06% | +6,872+26.8% | Added |
| Gabelli Funds LLC | 33,000 | $5.50M | 0.04% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 34,747 | $5.79M | 0.01% | +15,044+76.4% | Added |
| Amundi | 41,167 | $6.27M | 0.00% | −70,314−63.1% | Reduced |
| Allspring Global Investments Holdings, LLC | 38,302 | $6.42M | 0.01% | −10,462−21.5% | Reduced |
| Bridger Management, LLC | 39,300 | $6.55M | 3.25% | +39,300 | New |
| Norges Bank | 39,414 | $6.57M | 0.00% | +6,020+18.0% | Added |
| Barclays PLC | 39,853 | $6.64M | 0.00% | −13,366−25.1% | Reduced |
| New York State Teachers Retirement System | 40,048 | $6.67M | 0.02% | −5,200−11.5% | Reduced |
| STRS Ohio | 40,135 | $6.69M | 0.03% | +24,735+160.6% | Added |
| Point72 (DIFC) Ltd | 41,639 | $6.94M | 0.67% | −16,778−28.7% | Reduced |
| Logan Capital Management Inc | 42,395 | $7.06M | 0.32% | −5,392−11.3% | Reduced |
| State Board of Administration of Florida Retirement System | 42,771 | $7.13M | 0.01% | −90−0.2% | Reduced |
| California State Teachers Retirement System | 43,252 | $7.21M | 0.01% | +869+2.1% | Added |
| NS Partners Ltd | 43,555 | $7.26M | 0.32% | +906+2.1% | Added |
| Royal Bank of Canada | 43,884 | $7.31M | 0.00% | +13,513+44.5% | Added |
| Picton Mahoney Asset Management | 44,152 | $7.36M | 0.25% | +1,542+3.6% | Added |
| Integral Health Asset Management, LLC | 45,000 | $7.50M | 0.83% | +45,000 | New |
| Baird Financial Group, Inc. | 45,120 | $7.52M | 0.01% | +10,922+31.9% | Added |
| Corebridge Financial, Inc. | 49,327 | $8.22M | 0.05% | −1,209−2.4% | Reduced |
| SEI Investments Co | 49,365 | $8.22M | 0.01% | +22,764+85.6% | Added |
| Citadel Advisors LLC | 49,482 | $8.24M | 0.01% | −391,543−88.8% | Reduced |
| Federated Hermes, Inc. | 51,002 | $8.50M | 0.02% | −1,732−3.3% | Reduced |
| Citigroup Inc | 52,158 | $8.69M | 0.01% | −39,533−43.1% | Reduced |
| Manufacturers Life Insurance Company, The | 53,900 | $8.98M | 0.01% | +2,443+4.7% | Added |
| Retirement Systems of Alabama | 54,087 | $9.01M | 0.04% | +52+0.1% | Added |
| ExodusPoint Capital Management, LP | 59,792 | $9.96M | 0.13% | +34,366+135.2% | Added |
| Quantinno Capital Management LP | 63,739 | $10.6M | 0.07% | +59,749+1,497.5% | Added |
| Bellevue Group AG | 69,808 | $11.6M | 0.26% | +45,642+188.9% | Added |
| California Public Employees Retirement System | 69,875 | $11.6M | 0.01% | −354−0.5% | Reduced |
| BNP Paribas Arbitrage, SA | 70,723 | $11.8M | 0.01% | +63,703+907.5% | Added |
| Neuberger Berman Group LLC | 74,962 | $12.5M | 0.01% | −63,160−45.7% | Reduced |
| Walleye Capital LLC | 76,370 | $12.7M | 0.14% | +21,432+39.0% | Added |
| American Century Companies Inc | 79,176 | $13.2M | 0.01% | +66,517+525.5% | Added |
| Gamco Investors, Inc. Et Al | 84,500 | $14.1M | 0.15% | 00.0% | Unchanged |
| Swiss National Bank | 88,200 | $14.7M | 0.01% | −1,200−1.3% | Reduced |
| TD Asset Management Inc | 88,668 | $14.8M | 0.01% | +4,028+4.8% | Added |
| Erste Asset Management GmbH | 92,000 | $15.3M | 0.20% | +9,348+11.3% | Added |
| Great Lakes Advisors, LLC | 92,872 | $15.5M | 0.14% | −2,858−3.0% | Reduced |
| Bank of Nova Scotia | 93,203 | $15.5M | 0.03% | +93,203 | New |
| BLI - Banque de Luxembourg Investments | 101,200 | $16.5M | 0.50% | 00.0% | Unchanged |
| Legal & General Group Plc | 99,542 | $16.6M | 0.00% | +2,355+2.4% | Added |
| Principal Financial Group Inc | 102,661 | $17.1M | 0.01% | +10.0% | Added |
| Toroso Investments, LLC | 110,486 | $18.4M | 0.16% | +23,755+27.4% | Added |
| Rockefeller Capital Management L.P. | 117,326 | $19.5M | 0.05% | +26,425+29.1% | Added |
| Rhumbline Advisers | 122,811 | $20.5M | 0.02% | −1,562−1.3% | Reduced |
| Woodline Partners LP | 132,969 | $22.2M | 0.14% | +81,784+159.8% | Added |
| Millennium Management LLC | 134,806 | $22.5M | 0.02% | −273,252−67.0% | Reduced |
| Comerica Bank | 137,855 | $23.0M | 0.10% | −3,523−2.5% | Reduced |
| Verition Fund Management LLC | 143,759 | $24.0M | 0.14% | +136,278+1,821.7% | Added |
| Gotham Asset Management, LLC | 144,590 | $24.1M | 0.20% | +16,810+13.2% | Added |
| First Trust Advisors LP | 145,164 | $24.2M | 0.02% | +97,836+206.7% | Added |
| Cramer Rosenthal McGlynn LLC | 151,664 | $25.3M | 1.82% | −71,153−31.9% | Reduced |
| Nuveen, LLC | 155,045 | $25.8M | 0.01% | +155,045 | New |
| FIL Ltd | 169,788 | $28.3M | 0.03% | +59,456+53.9% | Added |
| UBS Group AG | 170,177 | $28.4M | 0.01% | +10,149+6.3% | Added |
| UBS Asset Management Americas Inc | 189,130 | $31.5M | 0.01% | −1,116−0.6% | Reduced |
| Raymond James Financial Inc | 206,116 | $34.3M | 0.01% | +2,145+1.1% | Added |
| Ameriprise Financial Inc | 211,786 | $35.3M | 0.01% | −4,160−1.9% | Reduced |
| JPMorgan Chase & Co | 246,489 | $41.1M | 0.00% | +117,850+91.6% | Added |
| Invesco Ltd. | 261,358 | $43.5M | 0.01% | −16,602−6.0% | Reduced |
| Goldman Sachs Group Inc | 280,255 | $46.7M | 0.01% | +78,003+38.6% | Added |
| Price T Rowe Associates Inc | 282,637 | $47.1M | 0.01% | +31,851+12.7% | Added |
| Artisan Partners Limited Partnership | 299,023 | $49.8M | 0.08% | +299,023 | New |
| Point72 Asset Management, L.P. | 315,422 | $52.5M | 0.15% | +66,923+26.9% | Added |
| Bank of America Corp | 316,643 | $52.8M | 0.00% | +209,340+195.1% | Added |
| Bamco Inc | 317,282 | $52.9M | 0.16% | +10,138+3.3% | Added |
| Bank of New York Mellon Corp | 332,108 | $55.3M | 0.01% | −5,113−1.5% | Reduced |
| CI Private Wealth, LLC | 348,038 | $58.0M | 0.09% | +355+0.1% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 372,978 | $62.1M | 0.04% | −727−0.2% | Reduced |
| Charles Schwab Investment Management Inc | 377,070 | $62.8M | 0.01% | −766−0.2% | Reduced |
| Northern Trust Corp | 383,356 | $63.9M | 0.01% | −513−0.1% | Reduced |
| Schroder Investment Management Group | 435,548 | $71.2M | 0.07% | −130,921−23.1% | Reduced |
| Westfield Capital Management Co LP | 671,479 | $111.9M | 0.54% | −97,379−12.7% | Reduced |
| RTW Investments, LP | 683,294 | $113.8M | 1.74% | 00.0% | Unchanged |
| Dimensional Fund Advisors LP | 703,378 | $117.2M | 0.03% | +55,658+8.6% | Added |
| Alyeska Investment Group, L.P. | 722,534 | $120.4M | 0.48% | +143,899+24.9% | Added |
| Morgan Stanley | 735,782 | $122.6M | 0.01% | −2,059−0.3% | Reduced |
| Liontrust Investment Partners LLP | 747,498 | $124.5M | 1.94% | −45,437−5.7% | Reduced |
| Geode Capital Management, LLC | 844,318 | $140.7M | 0.01% | +43,193+5.4% | Added |
| Alliancebernstein L.P. | 865,870 | $144.3M | 0.05% | −81,521−8.6% | Reduced |
| Durable Capital Partners LP | 1,125,619 | $187.5M | 1.68% | +1,125,619 | New |
| Holocene Advisors, LP | 1,333,296 | $222.1M | 0.66% | +497,636+59.6% | Added |
| State Street Corp | 1,475,991 | $245.9M | 0.01% | +12,525+0.9% | Added |
| T. Rowe Price Investment Management, Inc. | 1,673,252 | $278.8M | 0.18% | +10,876+0.7% | Added |
| Massachusetts Financial Services Co | 1,967,838 | $327.8M | 0.11% | +232,671+13.4% | Added |
| Capital Research Global Investors | 2,056,095 | $342.5M | 0.07% | −398,880−16.2% | Reduced |
| Vanguard Group Inc | 4,583,276 | $763.6M | 0.01% | −3,426−0.1% | Reduced |
| Politan Capital Management LP | 4,714,746 | $785.5M | 53.37% | 00.0% | Unchanged |
| FMR LLC | 8,178,763 | $1.36B | 0.09% | +81,309+1.0% | Added |
| BlackRock, Inc. | 9,871,428 | $1.64B | 0.03% | +1,173,215+13.5% | Added |
| IFP Advisors, Inc | 4 | – | – | +4 | Added |
| Farallon Capital Management, L.L.C. | 0 | $0 | 0.00% | −397,000−100.0% | Sold out |
| Catalio Capital Management, LP | 0 | $0 | 0.00% | −87,377−100.0% | Sold out |
| Man Group plc | 0 | $0 | 0.00% | −64,889−100.0% | Sold out |
| Ace Management Global Ltd. | 0 | $0 | 0.00% | −47,694−100.0% | Sold out |
| LMR Partners LLP | 0 | $0 | 0.00% | −42,448−100.0% | Sold out |
| Atika Capital Management LLC | 0 | $0 | 0.00% | −36,800−100.0% | Sold out |
| Cinctive Capital Management LP | 0 | $0 | 0.00% | −25,176−100.0% | Sold out |