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 2024
Institutional positions in Masimo Corp as of Mar 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
- 339
- 0 vs. Q4 2023
- Shares held
- 51.7M
- +1.31M (+2.6%) vs. Q4 2023
- Total value
- $7.59B
- +$1.69B (+28.6%) vs. Q4 2023
- New holders
- 50
- 96 more added
- Sold out
- 50
- 127 more reduced
3 institutions that held it in Q4 2023 haven't filed for Q1 2024 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2024
Shares, value and share of portfolio for each institution holding Masimo Corp; share changes are against Q4 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Retirement Systems of Alabama | 144,938 | $21.3M | 0.08% | +146+0.1% | Added |
| Federated Hermes, Inc. | 155,385 | $22.8M | 0.05% | −13,266−7.9% | Reduced |
| Principal Financial Group Inc | 167,748 | $24.6M | 0.01% | +3,121+1.9% | Added |
| Senator Investment Group LP | 174,000 | $25.6M | 1.16% | +64,000+58.2% | Added |
| Raymond James & Associates | 181,611 | $26.7M | 0.02% | +1,996+1.1% | Added |
| ArrowMark Colorado Holdings LLC | 218,810 | $32.1M | 0.37% | −206,903−48.6% | Reduced |
| Balyasny Asset Management LLC | 255,508 | $37.5M | 0.10% | −47,027−15.5% | Reduced |
| Northern Trust Corp | 277,451 | $40.7M | 0.01% | −69,902−20.1% | Reduced |
| Jackson Square Partners, LLC | 296,458 | $43.5M | 1.81% | −465,871−61.1% | Reduced |
| Point72 Asset Management, L.P. | 326,154 | $47.9M | 0.14% | −190,202−36.8% | Reduced |
| Bamco Inc | 345,800 | $50.8M | 0.14% | +345,800 | New |
| Millennium Management LLC | 347,016 | $51.0M | 0.04% | +150,556+76.6% | Added |
| JPMorgan Chase & Co | 358,058 | $52.6M | 0.00% | +2,859+0.8% | Added |
| Dimensional Fund Advisors LP | 360,337 | $52.9M | 0.01% | +58,849+19.5% | Added |
| Ensemble Capital Management, LLC | 366,335 | $53.8M | 4.51% | −5,843−1.6% | Reduced |
| Charles Schwab Investment Management Inc | 378,375 | $55.6M | 0.01% | +10,334+2.8% | Added |
| Alyeska Investment Group, L.P. | 379,419 | $55.7M | 0.35% | −155,296−29.0% | Reduced |
| MIG Capital, LLC | 381,732 | $56.1M | 7.79% | −65,547−14.7% | Reduced |
| Bank of New York Mellon Corp | 390,925 | $57.4M | 0.01% | −24,910−6.0% | Reduced |
| Sumitomo Mitsui Trust Holdings, Inc. | 391,889 | $57.5M | 0.04% | −21,926−5.3% | Reduced |
| Morgan Stanley | 471,459 | $69.2M | 0.01% | +13,435+2.9% | Added |
| Schroder Investment Management Group | 527,336 | $77.4M | 0.09% | −350,203−39.9% | Reduced |
| Westfield Capital Management Co LP | 686,100 | $100.8M | 0.53% | −132,376−16.2% | Reduced |
| Geode Capital Management, LLC | 754,160 | $110.8M | 0.01% | +30,224+4.2% | Added |
| Holocene Advisors, LP | 778,414 | $114.3M | 0.42% | +778,414 | New |
| Liontrust Investment Partners LLP | 825,529 | $121.2M | 1.69% | −26,864−3.2% | Reduced |
| Thrivent Financial for Lutherans | 856,860 | $125.8M | 0.25% | −206,521−19.4% | Reduced |
| Ace Management Global Ltd. | 1,169,352 | $171.7M | 63.47% | +1,169,352 | New |
| T. Rowe Price Investment Management, Inc. | 1,205,063 | $177.0M | 0.11% | +43,156+3.7% | Added |
| Citadel Advisors LLC | 1,345,216 | $197.5M | 0.19% | +581,137+76.1% | Added |
| State Street Corp | 1,360,322 | $199.8M | 0.01% | +2,920+0.2% | Added |
| RTW Investments, LP | 1,462,400 | $214.8M | 3.17% | 00.0% | Unchanged |
| Farallon Capital Management, L.L.C. | 1,489,563 | $218.7M | 1.29% | +177,914+13.6% | Added |
| Massachusetts Financial Services Co | 1,721,785 | $252.8M | 0.08% | +114,475+7.1% | Added |
| Capital Research Global Investors | 2,269,246 | $333.2M | 0.08% | +570.0% | Added |
| Vanguard Group Inc | 4,555,853 | $669.0M | 0.01% | −225,490−4.7% | Reduced |
| Politan Capital Management LP | 4,713,518 | $692.2M | 36.00% | 00.0% | Unchanged |
| FMR LLC | 6,977,281 | $1.02B | 0.07% | +49,709+0.7% | Added |
| BlackRock Inc. | 7,880,374 | $1.16B | 0.03% | +2,221,243+39.3% | Added |
| Hawk Ridge Capital Management LP | 0 | $0 | 0.00% | −342,528−100.0% | Sold out |
| Nine Ten Capital Management LLC | 0 | $0 | 0.00% | −163,925−100.0% | Sold out |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 0 | $0 | 0.00% | −137,294−100.0% | Sold out |
| Twin Tree Management, LP | 0 | $0 | 0.00% | −112,419−100.0% | Sold out |
| Baillie Gifford & Co | 0 | $0 | 0.00% | −86,188−100.0% | Sold out |
| Clearline Capital LP | 0 | $0 | 0.00% | −62,197−100.0% | Sold out |
| Kornitzer Capital Management Inc | 0 | $0 | 0.00% | −53,000−100.0% | Sold out |
| ExodusPoint Capital Management, LP | 0 | $0 | 0.00% | −51,289−100.0% | Sold out |
| 13D Management LLC | 0 | $0 | 0.00% | −44,095−100.0% | Sold out |
| Man Group plc | 0 | $0 | 0.00% | −41,955−100.0% | Sold out |
| Polar Asset Management Partners Inc. | 0 | $0 | 0.00% | −40,200−100.0% | Sold out |
| Lighthouse Investment Partners, LLC | 0 | $0 | 0.00% | −37,289−100.0% | Sold out |
| DekaBank Deutsche Girozentrale | 0 | $0 | 0.00% | −35,900−100.0% | Sold out |
| Collaborative Holdings Management LP | 0 | $0 | 0.00% | −31,009−100.0% | Sold out |
| Readystate Asset Management LP | 0 | $0 | 0.00% | −27,480−100.0% | Sold out |
| Bell Asset Management Ltd | 0 | $0 | 0.00% | −19,405−100.0% | Sold out |
| Royal London Asset Management Ltd | 0 | $0 | 0.00% | −17,188−100.0% | Sold out |
| Standard Life Aberdeen plc | 0 | $0 | 0.00% | −14,334−100.0% | Sold out |
| Fred Alger Management, LLC | 0 | $0 | 0.00% | −12,439−100.0% | Sold out |
| Weiss Multi-Strategy Advisers LLC | 0 | $0 | 0.00% | −12,000−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −11,611−100.0% | Sold out |
| KP Management LLC | 0 | $0 | 0.00% | −8,884−100.0% | Sold out |
| Krensavage Asset Management, LLC | 0 | $0 | 0.00% | −8,000−100.0% | Sold out |
| Brevan Howard Capital Management LP | 0 | $0 | 0.00% | −7,696−100.0% | Sold out |
| Scientech Research LLC | 0 | $0 | 0.00% | −7,329−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −7,021−100.0% | Sold out |
| LMR Partners LLP | 0 | $0 | 0.00% | −6,768−100.0% | Sold out |
| Walleye Trading LLC | 0 | $0 | 0.00% | −6,428−100.0% | Sold out |
| Entropy Technologies, LP | 0 | $0 | 0.00% | −6,249−100.0% | Sold out |
| Peloton Wealth Strategists | 0 | $0 | 0.00% | −5,950−100.0% | Sold out |
| Carmignac Gestion | 0 | $0 | 0.00% | −5,000−100.0% | Sold out |
| Algert Global LLC | 0 | $0 | 0.00% | −3,270−100.0% | Sold out |
| Edgestream Partners, L.P. | 0 | $0 | 0.00% | −2,297−100.0% | Sold out |
| Aviva PLC | 0 | $0 | 0.00% | −1,714−100.0% | Sold out |
| Advisory Services Network, LLC | 0 | $0 | 0.00% | −857−100.0% | Sold out |
| Wahed Invest LLC | 0 | $0 | 0.00% | −734−100.0% | Sold out |
| Byrne Asset Management LLC | 0 | $0 | 0.00% | −240−100.0% | Sold out |
| BI Asset Management Fondsmaeglerselskab A/S | 0 | $0 | 0.00% | −119−100.0% | Sold out |
| Nomura Asset Management Co Ltd | 0 | $0 | 0.00% | −110−100.0% | Sold out |
| Farmers & Merchants Trust Co of Chambersburg PA | 0 | $0 | 0.00% | −89−100.0% | Sold out |
| Glassman Wealth Services | 0 | $0 | 0.00% | −82−100.0% | Sold out |
| Global Wealth Strategies & Associates | 0 | $0 | 0.00% | −50−100.0% | Sold out |
| Pineridge Advisors LLC | 0 | $0 | 0.00% | −28−100.0% | Sold out |
| Ronald Blue Trust, Inc. | 0 | $0 | 0.00% | −38−100.0% | Sold out |
| Turtle Creek Wealth Advisors, LLC | 0 | $0 | 0.00% | −21−100.0% | Sold out |
| TD Waterhouse Canada Inc. | 0 | $0 | 0.00% | −8−100.0% | Sold out |
| AdvisorNet Financial, Inc | 0 | $0 | 0.00% | −6−100.0% | Sold out |
| Fairfield, Bush & Co. | 0 | $0 | 0.00% | −3−100.0% | Sold out |
| Bokf, NA | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Transamerica Financial Advisors, Inc. | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| M&G Investment Management Ltd | – | – | – | – | Not filed |
| Provence Wealth Management Group | – | – | – | – | Not filed |
| Coppell Advisory Solutions LLC | – | – | – | – | Not filed |