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 2023
Institutional positions in Masimo Corp as of Dec 31, 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
- 342
- −10 vs. Q3 2023
- Shares held
- 50.4M
- +3.05M (+6.5%) vs. Q3 2023
- Total value
- $5.91B
- +$1.75B (+42.3%) vs. Q3 2023
- New holders
- 63
- 111 more added
- Sold out
- 73
- 121 more reduced
5 institutions that held it in Q3 2023 haven't filed for Q4 2023 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2023
Shares, value and share of portfolio for each institution holding Masimo Corp; share changes are against Q3 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Federated Hermes, Inc. | 168,651 | $19.8M | 0.05% | −984−0.6% | Reduced |
| Goldman Sachs Group Inc | 175,510 | $20.6M | 0.00% | +90,572+106.6% | Added |
| Raymond James & Associates | 179,615 | $21.1M | 0.02% | −22,037−10.9% | Reduced |
| SEI Investments Co | 180,628 | $21.2M | 0.03% | −3,312−1.8% | Reduced |
| Marshall Wace, LLP | 189,053 | $22.2M | 0.04% | +189,053 | New |
| Legal & General Group Plc | 191,198 | $22.4M | 0.01% | −10,481−5.2% | Reduced |
| Millennium Management LLC | 196,460 | $23.0M | 0.02% | −44,741−18.5% | Reduced |
| FIL Ltd | 216,474 | $25.4M | 0.03% | +99,004+84.3% | Added |
| Woodline Partners LP | 282,275 | $33.1M | 0.36% | +211,496+298.8% | Added |
| Dimensional Fund Advisors LP | 301,488 | $35.3M | 0.01% | +16,042+5.6% | Added |
| Balyasny Asset Management LLC | 302,535 | $35.5M | 0.10% | +52,107+20.8% | Added |
| Hawk Ridge Capital Management LP | 342,528 | $40.1M | 2.30% | −225,237−39.7% | Reduced |
| Northern Trust Corp | 347,353 | $40.7M | 0.01% | +13,577+4.1% | Added |
| JPMorgan Chase & Co | 355,199 | $41.6M | 0.00% | +263,324+286.6% | Added |
| Charles Schwab Investment Management Inc | 368,041 | $43.1M | 0.01% | +20,519+5.9% | Added |
| Ensemble Capital Management, LLC | 372,178 | $43.6M | 3.88% | +4,138+1.1% | Added |
| Price T Rowe Associates Inc | 410,508 | $48.1M | 0.01% | −41,431−9.2% | Reduced |
| Sumitomo Mitsui Trust Holdings, Inc. | 413,815 | $48.5M | 0.04% | +8,498+2.1% | Added |
| Bank of New York Mellon Corp | 415,835 | $48.7M | 0.01% | +25,212+6.5% | Added |
| ArrowMark Colorado Holdings LLC | 425,713 | $49.9M | 0.55% | +122,862+40.6% | Added |
| MIG Capital, LLC | 447,279 | $52.4M | 7.32% | +48,347+12.1% | Added |
| Morgan Stanley | 458,024 | $53.7M | 0.00% | −43,880−8.7% | Reduced |
| Point72 Asset Management, L.P. | 516,356 | $60.5M | 0.18% | +329,712+176.7% | Added |
| Alyeska Investment Group, L.P. | 534,715 | $62.7M | 0.42% | +534,715 | New |
| Geode Capital Management, LLC | 723,936 | $84.9M | 0.01% | +24,183+3.5% | Added |
| Jackson Square Partners, LLC | 762,329 | $89.4M | 2.90% | −99,379−11.5% | Reduced |
| Citadel Advisors LLC | 764,079 | $89.6M | 0.09% | +507,387+197.7% | Added |
| Westfield Capital Management Co LP | 818,476 | $95.9M | 0.56% | +214,795+35.6% | Added |
| Liontrust Investment Partners LLP | 852,393 | $99.9M | 1.45% | −54,045−6.0% | Reduced |
| Schroder Investment Management Group | 877,539 | $102.9M | 0.13% | +327,863+59.6% | Added |
| Thrivent Financial for Lutherans | 1,063,381 | $124.6M | 0.27% | +1,048,462+7,027.7% | Added |
| T. Rowe Price Investment Management, Inc. | 1,161,907 | $136.2M | 0.09% | +244,381+26.6% | Added |
| Farallon Capital Management, L.L.C. | 1,311,649 | $153.7M | 0.96% | +1,084,000+476.2% | Added |
| State Street Corp | 1,357,402 | $159.1M | 0.01% | −45,806−3.3% | Reduced |
| RTW Investments, LP | 1,462,400 | $171.4M | 2.68% | −39,093−2.6% | Reduced |
| Massachusetts Financial Services Co | 1,607,310 | $188.4M | 0.06% | +93,861+6.2% | Added |
| Capital Research Global Investors | 2,269,189 | $266.0M | 0.07% | +136,617+6.4% | Added |
| Politan Capital Management LP | 4,713,518 | $552.5M | 31.54% | 00.0% | Unchanged |
| Vanguard Group Inc | 4,781,343 | $560.4M | 0.01% | +26,473+0.6% | Added |
| BlackRock Inc. | 5,659,131 | $663.3M | 0.02% | +246,798+4.6% | Added |
| FMR LLC | 6,927,572 | $812.0M | 0.06% | +1,680,009+32.0% | Added |
| Transamerica Financial Advisors, Inc. | 1 | – | – | −1−50.0% | Reduced |
| Eminence Capital, LP | 0 | $0 | 0.00% | −1,036,253−100.0% | Sold out |
| Sachem Head Capital Management LP | 0 | $0 | 0.00% | −634,100−100.0% | Sold out |
| HBK Investments L P | 0 | $0 | 0.00% | −295,000−100.0% | Sold out |
| Glenview Capital Management, LLC | 0 | $0 | 0.00% | −208,848−100.0% | Sold out |
| Wolf Hill Capital Management, LP | 0 | $0 | 0.00% | −200,000−100.0% | Sold out |
| Hudson Bay Capital Management LP | 0 | $0 | 0.00% | −142,524−100.0% | Sold out |
| Cubist Systematic Strategies, LLC | 0 | $0 | 0.00% | −89,923−100.0% | Sold out |
| Boussard & Gavaudan Investment Management LLP | 0 | $0 | 0.00% | −70,723−100.0% | Sold out |
| Voloridge Investment Management, LLC | 0 | $0 | 0.00% | −67,795−100.0% | Sold out |
| Coronation Fund Managers Ltd. | 0 | $0 | 0.00% | −66,966−100.0% | Sold out |
| Twinbeech Capital LP | 0 | $0 | 0.00% | −54,361−100.0% | Sold out |
| Irenic Capital Management LP | 0 | $0 | 0.00% | −47,309−100.0% | Sold out |
| Prosight Management, LP | 0 | $0 | 0.00% | −40,000−100.0% | Sold out |
| RK Capital Management, LLC | 0 | $0 | 0.00% | −38,580−100.0% | Sold out |
| Point72 Middle East FZE | 0 | $0 | 0.00% | −35,912−100.0% | Sold out |
| Centiva Capital, LP | 0 | $0 | 0.00% | −31,602−100.0% | Sold out |
| Symmetry Investments LP | 0 | $0 | 0.00% | −30,836−100.0% | Sold out |
| Dynamic Technology Lab Private Ltd | 0 | $0 | 0.00% | −26,940−100.0% | Sold out |
| Campbell & CO Investment Adviser LLC | 0 | $0 | 0.00% | −22,279−100.0% | Sold out |
| Qsemble Capital Management, LP | 0 | $0 | 0.00% | −21,400−100.0% | Sold out |
| FORA Capital, LLC | 0 | $0 | 0.00% | −21,055−100.0% | Sold out |
| Y-Intercept (Hong Kong) Ltd | 0 | $0 | 0.00% | −20,233−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −18,843−100.0% | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −16,530−100.0% | Sold out |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −12,491−100.0% | Sold out |
| Duality Advisers, LP | 0 | $0 | 0.00% | −12,157−100.0% | Sold out |
| Susquehanna Fundamental Investments, LLC | 0 | $0 | 0.00% | −11,899−100.0% | Sold out |
| Two Sigma Securities, LLC | 0 | $0 | 0.00% | −11,340−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −10,793−100.0% | Sold out |
| Two Sigma Investments, LP | 0 | $0 | 0.00% | −8,587−100.0% | Sold out |
| Echo Street Capital Management LLC | 0 | $0 | 0.00% | −7,151−100.0% | Sold out |
| Advisors Preferred, LLC | 0 | $0 | 0.00% | −6,150−100.0% | Sold out |
| Aigen Investment Management, LP | 0 | $0 | 0.00% | −4,901−100.0% | Sold out |
| Steel Peak Wealth Management LLC | 0 | $0 | 0.00% | −4,235−100.0% | Sold out |
| Nebula Research & Development LLC | 0 | $0 | 0.00% | −4,014−100.0% | Sold out |
| Vestcor Inc | 0 | $0 | 0.00% | −3,779−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −3,500−100.0% | Sold out |
| GTS Securities LLC | 0 | $0 | 0.00% | −3,297−100.0% | Sold out |
| Blueshift Asset Management, LLC | 0 | $0 | 0.00% | −3,273−100.0% | Sold out |
| Pearl River Capital, LLC | 0 | $0 | 0.00% | −3,234−100.0% | Sold out |
| Inceptionr LLC | 0 | $0 | 0.00% | −3,029−100.0% | Sold out |
| Graham Capital Management, L.P. | 0 | $0 | 0.00% | −2,797−100.0% | Sold out |
| Laurion Capital Management LP | 0 | $0 | 0.00% | −2,644−100.0% | Sold out |
| Fox Run Management, L.L.C. | 0 | $0 | 0.00% | −2,628−100.0% | Sold out |
| Inspire Advisors, LLC | 0 | $0 | 0.00% | −2,505−100.0% | Sold out |
| Forte Capital LLC | 0 | $0 | 0.00% | −2,481−100.0% | Sold out |
| Bridgefront Capital, LLC | 0 | $0 | 0.00% | −2,481−100.0% | Sold out |
| Mackenzie Financial Corp | 0 | $0 | 0.00% | −2,550−100.0% | Sold out |
| Jefferies Financial Group Inc. | 0 | $0 | 0.00% | −2,173−100.0% | Sold out |
| Benjamin F. Edwards & Company, Inc. | 0 | $0 | 0.00% | −500−100.0% | Sold out |
| Itau Unibanco Holding S.A. | 0 | $0 | 0.00% | −437−100.0% | Sold out |
| Kapitalo Investimentos Ltda | 0 | $0 | 0.00% | −385−100.0% | Sold out |
| Skandinaviska Enskilda Banken AB (publ) | 0 | $0 | 0.00% | −355−100.0% | Sold out |
| Trivant Custom Portfolio Group, LLC | 0 | $0 | 0.00% | −300−100.0% | Sold out |
| Clear Street Markets LLC | 0 | $0 | 0.00% | −274−100.0% | Sold out |
| National Bank of Canada | 0 | $0 | 0.00% | −159−100.0% | Sold out |
| West Oak Capital, LLC | 0 | $0 | 0.00% | −100−100.0% | Sold out |
| Cary Street Partner Investment Advisory LLC | 0 | $0 | 0.00% | −100−100.0% | Sold out |