Quick Takeaways
- FMR LLC filed SCHEDULE 13G/A for MASIMO CORP COMMON STOCK (MASI).
- Disclosed ownership: 4.5%.
- Date of event: 27 Feb 2026.
FMR LLC - 27 Feb 2026 SCHEDULE 13G/A Report for MASIMO CORP COMMON STOCK (MASI)
- Filing Manager
- FMR LLC
- Reporting Manager
- FMR LLC
- Security
- MASIMO CORP COMMON STOCK
- Symbol
- MASI
- Shares outstanding
- 52,221,656 shares
- Disclosed Ownership
- 2,349,975 shares
- Ownership
- 4.5%
- Form type
- SCHEDULE 13G/A
- Filing time
- 06 Mar 2026, 10:05:20 UTC
- Date of event
- 27 Feb 2026
- Previous filing
- 12 Feb 2025
- SEC
- View on sec.gov
Quoteable Key Fact
"FMR LLC disclosed 4.5% ownership in MASIMO CORP COMMON STOCK (MASI) on 27 Feb 2026."
What Changed
- Previous schedule filing date: 12 Feb 2025.
- Current filing was accepted on 06 Mar 2026, 10:05.
Why This Matters
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Source Evidence
Backed by Schedule 13D/13G
See Original Filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting Managers (2)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| FMR LLC | 4.5% | 2,349,975 | 2,286,842 | 0 | Stephanie J. Brown | Duly authorized under Power of Attorney effective as of January 3, 2023, by and on behalf of FMR LLC and its direct and indirect subsidiaries* | |
| Abigail P. Johnson | 4.5% | 2,349,975 | 0 | 0 | Stephanie J. Brown | Duly authorized under Power of Attorney effective as of January 26, 2023, by and on behalf of Abigail P. Johnson** |