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 |
|---|---|---|---|---|---|
| Cardinal Capital Management | 11,802 | $1.38M | 0.26% | +255+2.2% | Added |
| Weiss Multi-Strategy Advisers LLC | 12,000 | $1.41M | 0.04% | +2,600+27.7% | Added |
| Fred Alger Management, LLC | 12,439 | $1.46M | 0.01% | +12,439 | New |
| Louisiana State Employees Retirement System | 12,500 | $1.47M | 0.03% | −100−0.8% | Reduced |
| Oregon Public Employees Retirement Fund | 12,548 | $1.47M | 0.03% | +100+0.8% | Added |
| Arizona State Retirement System | 12,551 | $1.47M | 0.01% | −222−1.7% | Reduced |
| Sofinnova Investments, Inc. | 12,800 | $1.50M | 0.08% | +12,800 | New |
| Capital Fund Management S.A. | 12,955 | $1.52M | 0.02% | −9,637−42.7% | Reduced |
| Empower Advisory Group, LLC | 14,160 | $1.66M | 0.01% | +100+0.7% | Added |
| Standard Life Aberdeen plc | 14,334 | $1.68M | 0.00% | +6,862+91.8% | Added |
| Lockerman Financial Group, Inc. | 14,400 | $1.69M | 3.90% | 00.0% | Unchanged |
| Simplex Trading, LLC | 14,646 | $1.72M | 0.05% | −36,043−71.1% | Reduced |
| Ensign Peak Advisors, Inc | 14,875 | $1.74M | 0.00% | −1,250−7.8% | Reduced |
| Birchview Capital, LP | 15,280 | $1.79M | 1.40% | 00.0% | Unchanged |
| Teachers Retirement System of the State of Kentucky | 15,841 | $1.86M | 0.02% | −700−4.2% | Reduced |
| Royal London Asset Management Ltd | 17,188 | $2.01M | 0.01% | −1,727−9.1% | Reduced |
| Brown Advisory Inc | 17,544 | $2.06M | 0.00% | −63−0.4% | Reduced |
| Public Employees Retirement System of Ohio | 18,433 | $2.16M | 0.01% | +531+3.0% | Added |
| Wolverine Trading, LLC | 18,687 | $2.19M | 0.02% | +4,884+35.4% | Added |
| Voya Investment Management LLC | 18,894 | $2.21M | 0.00% | −3,857−17.0% | Reduced |
| Treasurer of the State of North Carolina | 19,139 | $2.24M | 0.01% | +180+0.9% | Added |
| Bell Asset Management Ltd | 19,405 | $2.27M | 0.35% | −35,448−64.6% | Reduced |
| Bank of America Corp | 19,629 | $2.30M | 0.00% | −12,632−39.2% | Reduced |
| Abn Amro Investment Solutions | 19,656 | $2.30M | 0.04% | −7,584−27.8% | Reduced |
| Creative Planning | 19,769 | $2.32M | 0.00% | +1,483+8.1% | Added |
| Envestnet Asset Management Inc | 20,129 | $2.36M | 0.00% | −1,784−8.1% | Reduced |
| Deutsche Bank AG | 20,369 | $2.39M | 0.00% | −341−1.6% | Reduced |
| Yousif Capital Management, LLC | 20,998 | $2.46M | 0.03% | −51−0.2% | Reduced |
| State of Wisconsin Investment Board | 23,157 | $2.71M | 0.01% | +15,000+183.9% | Added |
| Janus Henderson Group PLC | 23,254 | $2.73M | 0.00% | −1,639−6.6% | Reduced |
| Allspring Global Investments Holdings, LLC | 24,466 | $2.87M | 0.00% | +20,863+579.0% | Added |
| State of Tennessee, Treasury Department | 25,560 | $3.00M | 0.01% | −11,163−30.4% | Reduced |
| Westmount Partners, LLC | 26,424 | $3.10M | 1.26% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 26,583 | $3.12M | 0.01% | −185,049−87.4% | Reduced |
| State of New Jersey Common Pension Fund D | 26,666 | $3.13M | 0.01% | 00.0% | Unchanged |
| MetLife Investment Management | 26,780 | $3.14M | 0.02% | −419−1.5% | Reduced |
| Brown Capital Management LLC | 26,972 | $3.16M | 0.05% | +4,849+21.9% | Added |
| Readystate Asset Management LP | 27,480 | $3.22M | 0.19% | +27,480 | New |
| Royal Bank of Canada | 27,476 | $3.22M | 0.00% | −8,698−24.0% | Reduced |
| Mutual of America Capital Management LLC | 27,507 | $3.22M | 0.04% | −1,416−4.9% | Reduced |
| Storebrand Asset Management AS | 28,960 | $3.39M | 0.01% | −620−2.1% | Reduced |
| Amalgamated Bank | 30,390 | $3.56M | 0.03% | −1,535−4.8% | Reduced |
| Collaborative Holdings Management LP | 31,009 | $3.63M | 11.08% | +31,009 | New |
| Mirae Asset Global Investments Co., Ltd. | 31,513 | $3.69M | 0.01% | +6,715+27.1% | Added |
| UBS Group AG | 32,124 | $3.77M | 0.00% | −15,944−33.2% | Reduced |
| South Dakota Investment Council | 32,447 | $3.80M | 0.08% | 00.0% | Unchanged |
| Great West Life Assurance Co | 32,570 | $3.81M | 0.01% | +51+0.2% | Added |
| Gabelli Funds LLC | 33,000 | $3.87M | 0.03% | 00.0% | Unchanged |
| British Columbia Investment Management Corp | 35,000 | $4.10M | 0.03% | −12,000−25.5% | Reduced |
| NS Partners Ltd | 35,618 | $4.17M | 0.20% | −5,899−14.2% | Reduced |
| Moran Wealth Management, LLC | 35,748 | $4.19M | 0.15% | +991+2.9% | Added |
| DekaBank Deutsche Girozentrale | 35,900 | $4.20M | 0.01% | +970+2.8% | Added |
| Simplify Asset Management Inc. | 36,916 | $4.33M | 0.67% | +36,916 | New |
| PEAK6 Investments LLC | 37,124 | $4.35M | 0.19% | +7,404+24.9% | Added |
| Lighthouse Investment Partners, LLC | 37,289 | $4.37M | 0.32% | +37,289 | New |
| Texas Permanent School Fund | 38,300 | $4.49M | 0.04% | +677+1.8% | Added |
| CenterBook Partners LP | 39,404 | $4.62M | 0.56% | −1,772−4.3% | Reduced |
| Polar Asset Management Partners Inc. | 40,200 | $4.71M | 0.13% | +40,200 | New |
| Man Group plc | 41,955 | $4.92M | 0.01% | – | – |
| 13D Management LLC | 44,095 | $5.17M | 3.04% | +21,982+99.4% | Added |
| Bridgewater Associates, LP | 45,726 | $5.36M | 0.03% | −7,442−14.0% | Reduced |
| California State Teachers Retirement System | 47,157 | $5.53M | 0.01% | −2,124−4.3% | Reduced |
| Credit Suisse AG | 47,279 | $5.54M | 0.01% | +4,590+10.8% | Added |
| New York State Common Retirement Fund | 47,304 | $5.54M | 0.01% | −5,514−10.4% | Reduced |
| State Board of Administration of Florida Retirement System | 49,151 | $5.76M | 0.01% | +1,945+4.1% | Added |
| Barclays PLC | 49,260 | $5.77M | 0.00% | +17,932+57.2% | Added |
| Logan Capital Management Inc | 49,873 | $5.85M | 0.27% | −1,415−2.8% | Reduced |
| New York State Teachers Retirement System | 50,548 | $5.92M | 0.01% | −2,500−4.7% | Reduced |
| ExodusPoint Capital Management, LP | 51,289 | $6.01M | 0.07% | −65,320−56.0% | Reduced |
| Citigroup Inc | 52,614 | $6.17M | 0.01% | −969−1.8% | Reduced |
| Kornitzer Capital Management Inc | 53,000 | $6.21M | 0.12% | +53,000 | New |
| Manufacturers Life Insurance Company, The | 56,568 | $6.63M | 0.00% | +831+1.5% | Added |
| American International Group, Inc. | 60,321 | $7.07M | 0.03% | −2,564−4.1% | Reduced |
| BNP Paribas Arbitrage, SA | 61,832 | $7.25M | 0.01% | −65,910−51.6% | Reduced |
| Clearline Capital LP | 62,197 | $7.29M | 0.81% | −213,452−77.4% | Reduced |
| Alliancebernstein L.P. | 67,517 | $7.91M | 0.00% | +5,485+8.8% | Added |
| California Public Employees Retirement System | 77,458 | $9.08M | 0.01% | −5,837−7.0% | Reduced |
| Invesco Ltd. | 78,103 | $9.15M | 0.00% | −21,859−21.9% | Reduced |
| TD Asset Management Inc | 79,430 | $9.31M | 0.01% | +8,000+11.2% | Added |
| Gotham Asset Management, LLC | 80,056 | $9.38M | 0.17% | +74,803+1,424.0% | Added |
| Ameriprise Financial Inc | 82,795 | $9.70M | 0.00% | +8,741+11.8% | Added |
| Gamco Investors, Inc. Et Al | 84,500 | $9.90M | 0.11% | 00.0% | Unchanged |
| Susquehanna Portfolio Strategies, LLC | 85,174 | $9.98M | 0.18% | +85,174 | New |
| Baillie Gifford & Co | 86,188 | $10.1M | 0.01% | −5,041−5.5% | Reduced |
| Jane Street Group, LLC | 86,506 | $10.1M | 0.01% | −90,109−51.0% | Reduced |
| Swiss National Bank | 88,400 | $10.4M | 0.01% | −10,200−10.3% | Reduced |
| Nuveen Asset Management, LLC | 93,068 | $10.9M | 0.00% | −1,145−1.2% | Reduced |
| UBS Asset Management Americas Inc | 102,275 | $12.0M | 0.00% | +1,117+1.1% | Added |
| Picton Mahoney Asset Management | 103,037 | $12.1M | 0.56% | +103,037 | New |
| Montanaro Asset Management Ltd | 104,250 | $12.2M | 2.30% | −38,000−26.7% | Reduced |
| Comerica Bank | 109,259 | $12.8M | 0.06% | +12,845+13.3% | Added |
| Senator Investment Group LP | 110,000 | $12.9M | 0.55% | +110,000 | New |
| Twin Tree Management, LP | 112,419 | $13.2M | 0.24% | +112,419 | New |
| Wells Fargo & Company | 116,712 | $13.7M | 0.00% | +86,162+282.0% | Added |
| Rockefeller Capital Management L.P. | 128,091 | $15.0M | 0.05% | −5,628−4.2% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 137,294 | $16.1M | 0.04% | −248,122−64.4% | Reduced |
| Rhumbline Advisers | 137,951 | $16.2M | 0.02% | −4,578−3.2% | Reduced |
| Retirement Systems of Alabama | 144,792 | $17.0M | 0.07% | +194+0.1% | Added |
| Nine Ten Capital Management LLC | 163,925 | $19.2M | 4.83% | +163,925 | New |
| Principal Financial Group Inc | 164,627 | $19.3M | 0.01% | −1,160−0.7% | Reduced |