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; 453 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 2025
Institutional positions in Masimo Corp as of Jun 30, 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
- 380
- −11 vs. Q1 2025
- Shares held
- 57.5M
- +3.35M (+6.2%) vs. Q1 2025
- Total value
- $9.68B
- +$653.6M (+7.2%) vs. Q1 2025
- New holders
- 46
- 127 more added
- Sold out
- 57
- 137 more reduced
3 institutions that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 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 | 453 | $9.69B |
| Q4 2025 | 394 | $7.20B |
| Q3 2025 | 360 | $8.31B |
| Q2 2025 | 380 | $9.68B |
| Q1 2025 | 394 | $9.02B |
| Q4 2024 | 366 | $8.50B |
| Q3 2024 | 363 | $6.77B |
| Q2 2024 | 353 | $6.28B |
| Q1 2024 | 340 | $7.74B |
| Q4 2023 | 343 | $6.02B |
| Q3 2023 | 358 | $4.27B |
| Q2 2023 | 415 | $7.56B |
| Q1 2023 | 428 | $8.30B |
| Q4 2022 | 406 | $6.58B |
| Q3 2022 | 419 | $6.54B |
| Q2 2022 | 418 | $5.81B |
| Q1 2022 | 458 | $6.61B |
| Q4 2021 | 521 | $13.6B |
| Q3 2021 | 476 | $12.5B |
| Q2 2021 | 459 | $11.1B |
| Q1 2021 | 481 | $10.3B |
Institutions, Q2 2025
Shares, value and share of portfolio for each institution holding Masimo Corp; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 10,507,326 | $1.77B | 0.03% | +635,898+6.4% | Added |
| FMR LLC | 8,181,372 | $1.38B | 0.08% | +2,6090.0% | Added |
| Politan Capital Management LP | 4,716,536 | $793.4M | 56.98% | +1,7900.0% | Added |
| Vanguard Group Inc | 4,638,135 | $780.2M | 0.01% | +54,859+1.2% | Added |
| T. Rowe Price Investment Management, Inc. | 2,500,144 | $420.6M | 0.27% | +826,892+49.4% | Added |
| Massachusetts Financial Services Co | 2,470,393 | $415.6M | 0.13% | +502,555+25.5% | Added |
| Capital Research Global Investors | 1,855,670 | $312.2M | 0.06% | −200,425−9.7% | Reduced |
| State Street Corp | 1,486,394 | $250.0M | 0.01% | +10,403+0.7% | Added |
| Holocene Advisors, LP | 1,243,607 | $209.2M | 0.52% | −89,689−6.7% | Reduced |
| Westfield Capital Management Co LP | 1,181,203 | $198.7M | 0.83% | +509,724+75.9% | Added |
| Durable Capital Partners LP | 1,163,898 | $195.8M | 1.48% | +38,279+3.4% | Added |
| Alyeska Investment Group, L.P. | 1,134,490 | $190.8M | 0.68% | +411,956+57.0% | Added |
| Geode Capital Management, LLC | 896,418 | $150.8M | 0.01% | +52,100+6.2% | Added |
| Alliancebernstein L.P. | 844,067 | $142.0M | 0.05% | −21,803−2.5% | Reduced |
| Viking Global Investors LPSuperinvestorViking Global Investors | 767,426 | $129.1M | 0.37% | +767,426 | New |
| Morgan Stanley | 767,375 | $129.1M | 0.01% | +31,593+4.3% | Added |
| Liontrust Investment Partners LLP | 708,300 | $119.2M | 1.71% | −39,198−5.2% | Reduced |
| RTW Investments, LP | 683,294 | $114.9M | 1.64% | 00.0% | Unchanged |
| Dimensional Fund Advisors LP | 523,226 | $88.0M | 0.02% | −180,152−25.6% | Reduced |
| Goldman Sachs Group Inc | 471,525 | $79.3M | 0.01% | +191,270+68.2% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 471,041 | $79.2M | 0.05% | +98,063+26.3% | Added |
| Schroder Investment Management Group | 448,501 | $75.4M | 0.06% | +12,953+3.0% | Added |
| Price T Rowe Associates Inc | 405,460 | $68.2M | 0.01% | +122,823+43.5% | Added |
| Ameriprise Financial Inc | 394,487 | $66.4M | 0.02% | +182,701+86.3% | Added |
| Northern Trust Corp | 388,542 | $65.4M | 0.01% | +5,186+1.4% | Added |
| Bamco Inc | 384,589 | $64.7M | 0.18% | +67,307+21.2% | Added |
| Charles Schwab Investment Management Inc | 370,734 | $62.4M | 0.01% | −6,336−1.7% | Reduced |
| CI Private Wealth, LLC | 330,414 | $55.6M | 0.08% | −17,624−5.1% | Reduced |
| Bank of New York Mellon Corp | 317,593 | $53.4M | 0.01% | −14,515−4.4% | Reduced |
| Grantham, Mayo, Van Otterloo & Co. LLC | 240,563 | $40.5M | 0.12% | +240,563 | New |
| Invesco Ltd. | 237,303 | $39.9M | 0.01% | −24,055−9.2% | Reduced |
| UBS Asset Management Americas Inc | 209,563 | $35.3M | 0.01% | +20,433+10.8% | Added |
| Raymond James Financial Inc | 200,229 | $33.7M | 0.01% | −5,887−2.9% | Reduced |
| Bank of America Corp | 190,176 | $32.0M | 0.00% | −126,467−39.9% | Reduced |
| Comerica Bank | 189,822 | $31.9M | 0.12% | +51,967+37.7% | Added |
| Woodline Partners LP | 182,709 | $30.7M | 0.16% | +49,740+37.4% | Added |
| TD Asset Management Inc | 167,176 | $28.1M | 0.02% | +78,508+88.5% | Added |
| Gotham Asset Management, LLC | 165,356 | $27.8M | 0.17% | +20,766+14.4% | Added |
| American Century Companies Inc | 152,228 | $25.6M | 0.01% | +73,052+92.3% | Added |
| Nuveen, LLC | 149,658 | $25.2M | 0.01% | −5,387−3.5% | Reduced |
| Hawk Ridge Capital Management LP | 148,685 | $25.0M | 1.04% | +148,685 | New |
| UBS Group AG | 142,164 | $23.9M | 0.00% | −28,013−16.5% | Reduced |
| JPMorgan Chase & Co | 138,090 | $23.2M | 0.00% | −108,399−44.0% | Reduced |
| Rhumbline Advisers | 127,496 | $21.4M | 0.02% | +4,685+3.8% | Added |
| Quantinno Capital Management LP | 120,383 | $20.3M | 0.09% | +56,644+88.9% | Added |
| Rockefeller Capital Management L.P. | 115,626 | $19.5M | 0.04% | −1,700−1.4% | Reduced |
| Royal Bank of Canada | 109,690 | $18.5M | 0.00% | +65,806+150.0% | Added |
| Toroso Investments, LLC | 106,198 | $17.9M | 0.12% | −4,288−3.9% | Reduced |
| Legal & General Group Plc | 104,364 | $17.6M | 0.00% | +4,822+4.8% | Added |
| Principal Financial Group Inc | 102,467 | $17.2M | 0.01% | −194−0.2% | Reduced |
| Falcon Edge Capital, LP | 102,068 | $17.2M | 1.85% | +102,068 | New |
| First Trust Advisors LP | 99,612 | $16.8M | 0.01% | −45,552−31.4% | Reduced |
| Cramer Rosenthal McGlynn LLC | 94,939 | $16.0M | 1.10% | −56,725−37.4% | Reduced |
| PFM Health Sciences, LP | 94,451 | $15.9M | 1.38% | +94,451 | New |
| Erste Asset Management GmbH | 92,000 | $15.5M | 0.13% | 00.0% | Unchanged |
| Bellevue Group AG | 89,673 | $15.1M | 0.33% | +19,865+28.5% | Added |
| Swiss National Bank | 87,700 | $14.8M | 0.01% | −500−0.6% | Reduced |
| BLI - Banque de Luxembourg Investments | 86,700 | $14.6M | 0.42% | −14,500−14.3% | Reduced |
| Gamco Investors, Inc. Et Al | 84,500 | $14.2M | 0.14% | 00.0% | Unchanged |
| Great Lakes Advisors, LLC | 82,348 | $13.9M | 0.12% | −10,524−11.3% | Reduced |
| Squarepoint Ops LLC | 74,027 | $12.5M | 0.03% | +57,359+344.1% | Added |
| Swedbank AB | 73,800 | $12.4M | 0.01% | +73,800 | New |
| California Public Employees Retirement System | 72,807 | $12.2M | 0.01% | +2,932+4.2% | Added |
| Point72 (DIFC) Ltd | 68,700 | $11.6M | 0.92% | +27,061+65.0% | Added |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 65,821 | $11.1M | 0.03% | +65,821 | New |
| Manufacturers Life Insurance Company, The | 58,714 | $9.88M | 0.01% | +4,814+8.9% | Added |
| FIL Ltd | 56,326 | $9.48M | 0.01% | −113,462−66.8% | Reduced |
| Barclays PLC | 56,114 | $9.44M | 0.00% | +16,261+40.8% | Added |
| STRS Ohio | 55,983 | $9.42M | 0.04% | +15,848+39.5% | Added |
| Retirement Systems of Alabama | 55,003 | $9.25M | 0.03% | +916+1.7% | Added |
| Bank of Nova Scotia | 53,108 | $8.93M | 0.02% | −40,095−43.0% | Reduced |
| AQR Capital Management LLC | 50,256 | $8.45M | 0.01% | +42,114+517.2% | Added |
| Citigroup Inc | 49,962 | $8.40M | 0.01% | −2,196−4.2% | Reduced |
| Cinctive Capital Management LP | 46,787 | $7.87M | 0.44% | +46,787 | New |
| Natixis | 45,648 | $7.68M | 0.04% | +45,648 | New |
| 4D Advisors, LLC | 45,000 | $7.57M | 4.07% | +15,000+50.0% | Added |
| Picton Mahoney Asset Management | 44,557 | $7.49M | 0.11% | +405+0.9% | Added |
| California State Teachers Retirement System | 43,353 | $7.29M | 0.01% | +101+0.2% | Added |
| State Board of Administration of Florida Retirement System | 43,319 | $7.29M | 0.01% | +548+1.3% | Added |
| Walleye Capital LLC | 43,232 | $7.27M | 0.07% | −33,138−43.4% | Reduced |
| NS Partners Ltd | 42,566 | $7.16M | 0.29% | −989−2.3% | Reduced |
| Amundi | 41,583 | $7.12M | 0.00% | +416+1.0% | Added |
| Baird Financial Group, Inc. | 40,720 | $6.85M | 0.01% | −4,400−9.8% | Reduced |
| New York State Teachers Retirement System | 40,048 | $6.74M | 0.01% | 00.0% | Unchanged |
| Norges Bank | 39,053 | $6.57M | 0.00% | −361−0.9% | Reduced |
| Bridger Management, LLC | 33,641 | $5.66M | 3.34% | −5,659−14.4% | Reduced |
| Gabelli Funds LLC | 32,700 | $5.50M | 0.04% | −300−0.9% | Reduced |
| Intech Investment Management LLC | 31,750 | $5.34M | 0.05% | −744−2.3% | Reduced |
| Nordea Investment Management AB | 31,868 | $5.33M | 0.00% | +5,659+21.6% | Added |
| Logan Capital Management Inc | 31,352 | $5.27M | 0.25% | −11,043−26.0% | Reduced |
| SEI Investments Co | 30,506 | $5.13M | 0.01% | −18,859−38.2% | Reduced |
| Victory Capital Management Inc | 29,368 | $4.94M | 0.00% | +3,001+11.4% | Added |
| Envestnet Asset Management Inc | 27,234 | $4.58M | 0.00% | −4,554−14.3% | Reduced |
| Wilson Asset Management (International) Pty Ltd | 27,234 | $4.58M | 1.13% | +27,234 | New |
| Harbor Capital Advisors, Inc. | 26,412 | $4.44M | 0.19% | +26,412 | New |
| MetLife Investment Management | 26,285 | $4.42M | 0.03% | +645+2.5% | Added |
| Great West Life Assurance Co | 26,120 | $4.39M | 0.01% | −492−1.8% | Reduced |
| Westmount Partners, LLC | 25,866 | $4.35M | 1.19% | −125−0.5% | Reduced |
| Renaissance Technologies LLC | 25,377 | $4.27M | 0.01% | +10,377+69.2% | Added |
| South Dakota Investment Council | 24,768 | $4.17M | 0.08% | 00.0% | Unchanged |