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 2026
Institutional positions in Masimo Corp as of Mar 31, 2026. 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
MASI is no longer listed, so this page shows Q1 2026. 13F filings for later quarters list far fewer holders.
- Institutional holders
- 451
- +65 vs. Q4 2025
- Shares held
- 54.6M
- +4.00M (+7.9%) vs. Q4 2025
- Total value
- $9.69B
- +$3.10B (+47.2%) vs. Q4 2025
- New holders
- 136
- 140 more added
- Sold out
- 71
- 107 more reduced
6 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Masimo Corp; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Orser Capital Management, LLC | 0 | $0 | 0.00% | −2,450−100.0% | Sold out |
| First Trust Advisors LP | 0 | $0 | 0.00% | −2,341−100.0% | Sold out |
| Inceptionr LLC | 0 | $0 | 0.00% | −2,202−100.0% | Sold out |
| nVerses Capital, LLC | 0 | $0 | 0.00% | −2,067−100.0% | Sold out |
| Aigen Investment Management, LP | 0 | $0 | 0.00% | −2,018−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −1,985−100.0% | Sold out |
| ISAM Funds (UK) Ltd | 0 | $0 | 0.00% | −1,762−100.0% | Sold out |
| Vontobel Holding Ltd. | 0 | $0 | 0.00% | −1,549−100.0% | Sold out |
| Caitong International Asset Management Co., Ltd | 0 | $0 | 0.00% | −890−100.0% | Sold out |
| Danske Bank A/S | 0 | $0 | 0.00% | −400−100.0% | Sold out |
| Kohmann Bosshard Financial Services, LLC | 0 | $0 | 0.00% | −342−100.0% | Sold out |
| Quest Partners LLC | 0 | $0 | 0.00% | −151−100.0% | Sold out |
| Flagship Harbor Advisors, LLC | 0 | $0 | 0.00% | −111−100.0% | Sold out |
| J.Safra Asset Management Corp | 0 | $0 | 0.00% | −105−100.0% | Sold out |
| Elyxium Wealth, LLC | 0 | $0 | 0.00% | −55−100.0% | Sold out |
| Navalign, LLC | 0 | $0 | 0.00% | −50−100.0% | Sold out |
| Inlight Wealth Management, LLC | 0 | $0 | 0.00% | −30−100.0% | Sold out |
| MidFirst Bank | 0 | $0 | 0.00% | −30−100.0% | Sold out |
| First Eagle Investment Management, LLC | 0 | $0 | 0.00% | −28−100.0% | Sold out |
| Optiver Holding B.V. | 0 | $0 | 0.00% | −18−100.0% | Sold out |
| SageView Advisory Group, LLC | 0 | $0 | 0.00% | −10−100.0% | Sold out |
| Investors Portfolio Services LLC | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |
| Norges Bank | – | – | – | – | Not filed |
| Comerica Bank | – | – | – | – | Not filed |
| BancorpSouth Bank | – | – | – | – | Not filed |
| Global Retirement Partners, LLC | – | – | – | – | Not filed |
| CIBC Private Wealth Group, LLC | – | – | – | – | Not filed |