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 2025
Institutional positions in Masimo Corp as of Dec 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
- 392
- +37 vs. Q3 2025
- Shares held
- 55.4M
- −842.2K (−1.5%) vs. Q3 2025
- Total value
- $7.20B
- −$1.09B (−13.1%) vs. Q3 2025
- New holders
- 86
- 102 more added
- Sold out
- 49
- 132 more reduced
3 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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 | 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 2025
Shares, value and share of portfolio for each institution holding Masimo Corp; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Montanaro Asset Management Ltd | 0 | $0 | 0.00% | −12,960−100.0% | Sold out |
| Quantitative Investment Management, LLC | 0 | $0 | 0.00% | −12,025−100.0% | Sold out |
| Perpetual Ltd | 0 | $0 | 0.00% | −10,648−100.0% | Sold out |
| Mitsubishi UFJ Asset Management (UK) Ltd. | 0 | $0 | 0.00% | −8,000−100.0% | Sold out |
| Fieldview Capital Management, LLC | 0 | $0 | 0.00% | −6,812−100.0% | Sold out |
| Teacher Retirement System of Texas | 0 | $0 | 0.00% | −6,033−100.0% | Sold out |
| Sherbrooke Park Advisers LLC | 0 | $0 | 0.00% | −5,905−100.0% | Sold out |
| Bayesian Capital Management, LP | 0 | $0 | 0.00% | −5,779−100.0% | Sold out |
| Steel Peak Wealth Management LLC | 0 | $0 | 0.00% | −5,292−100.0% | Sold out |
| Guggenheim Capital LLC | 0 | $0 | 0.00% | −5,276−100.0% | Sold out |
| CAPROCK Group, Inc. | 0 | $0 | 0.00% | −4,244−100.0% | Sold out |
| PharVision Advisers, LLC | 0 | $0 | 0.00% | −3,909−100.0% | Sold out |
| Kovitz Investment Group Partners, LLC | 0 | $0 | 0.00% | −3,821−100.0% | Sold out |
| DRW Securities, LLC | 0 | $0 | 0.00% | −3,222−100.0% | Sold out |
| Vestmark Advisory Solutions, Inc. | 0 | $0 | 0.00% | −3,209−100.0% | Sold out |
| EntryPoint Capital, LLC | 0 | $0 | 0.00% | −3,072−100.0% | Sold out |
| Brevan Howard Capital Management LP | 0 | $0 | 0.00% | −2,893−100.0% | Sold out |
| Alamea Verwaltungs GmbH | 0 | $0 | 0.00% | −2,566−100.0% | Sold out |
| Empowered Funds, LLC | 0 | $0 | 0.00% | −2,461−100.0% | Sold out |
| Custom Index Systems, LLC | 0 | $0 | 0.00% | −1,988−100.0% | Sold out |
| Truist Financial Corp | 0 | $0 | 0.00% | −1,846−100.0% | Sold out |
| Catalytic Wealth RIA, LLC | 0 | $0 | 0.00% | −1,598−100.0% | Sold out |
| Syon Capital LLC | 0 | $0 | 0.00% | −1,550−100.0% | Sold out |
| Corient IA LLC | 0 | $0 | 0.00% | −1,500−100.0% | Sold out |
| Marex Group plc | 0 | $0 | 0.00% | −1,486−100.0% | Sold out |
| MML Investors Services, LLC | 0 | $0 | 0.00% | −1,479−100.0% | Sold out |
| Fifth Third Wealth Advisors LLC | 0 | $0 | 0.00% | −1,468−100.0% | Sold out |
| apricus wealth, LLC | 0 | $0 | 0.00% | −1,462−100.0% | Sold out |
| Andina Capital Management, LLC | 0 | $0 | 0.00% | −1,420−100.0% | Sold out |
| Great Lakes Advisors, LLC | 0 | $0 | 0.00% | −1,377−100.0% | Sold out |
| C M Bidwell & Associates Ltd | 0 | $0 | 0.00% | −595−100.0% | Sold out |
| Ci Investments Inc. | 0 | $0 | 0.00% | −419−100.0% | Sold out |
| Advisory Services Network, LLC | 0 | $0 | 0.00% | −315−100.0% | Sold out |
| JPL Wealth Management, LLC | 0 | $0 | 0.00% | −126−100.0% | Sold out |
| Wealthspire Advisors, LLC | 0 | $0 | 0.00% | −112−100.0% | Sold out |
| Rise Advisors, LLC | 0 | $0 | 0.00% | −93−100.0% | Sold out |
| GPS Wealth Strategies Group, LLC | 0 | $0 | 0.00% | −37−100.0% | Sold out |
| Principal Securities, Inc. | 0 | $0 | 0.00% | −7−100.0% | Sold out |
| Mather Group, LLC. | 0 | $0 | 0.00% | −6−100.0% | Sold out |
| Heartwood Wealth Advisors LLC | 0 | $0 | 0.00% | −6−100.0% | Sold out |
| Tortoise Investment Management, LLC | 0 | $0 | 0.00% | −2−100.0% | Sold out |
| Wetherby Asset Management Inc | – | – | – | – | Not filed |
| Bryce Point Capital, LLC | – | – | – | – | Not filed |
| Hemington Wealth Management | – | – | – | – | Not filed |