# MASIMO CORP — DEFA14A

MASIMO CORP of IRVINE, CA filed a DEFA14A with the SEC on 2026-04-23. Industry: Electromedical & Electrotherapeutic Apparatus.

## Filing

- Filed: 2026-04-23
- Form: DEFA14A
- Accession: 0001104659-26-047846
- Registrant: MASIMO CORP
- CIK: 0000937556
- Industry (SIC): Electromedical & Electrotherapeutic Apparatus (3845)
- State of incorporation: DE
- Location: IRVINE, CA

## Documents (1)

| Seq | Type | Description |
| --- | --- | --- |
| 1 | DEFA14A | DEFA14A |

## Filing timeline for this registrant (60)

_Showing 12 of 60 filings._

| Filed | Form |
| --- | --- |
| 2026-04-23 | DEFA14A |
| [2026-04-01](https://search.stillhousedata.com/proxy/0001104659-26-038289) | DEFM14A |
| [2026-03-18](https://search.stillhousedata.com/proxy/0001104659-26-031261) | PREM14A |
| [2026-02-17](https://search.stillhousedata.com/proxy/0001104659-26-016485) | DEFA14A |
| [2026-02-17](https://search.stillhousedata.com/proxy/0001104659-26-016483) | DEFA14A |
| [2026-02-17](https://search.stillhousedata.com/proxy/0001104659-26-015913) | DEFA14A |
| [2025-03-26](https://search.stillhousedata.com/proxy/0001104659-25-027887) | DEF 14A |
| [2024-09-19](https://search.stillhousedata.com/proxy/0001213900-24-080007) | DEFA14A |
| [2024-09-18](https://search.stillhousedata.com/proxy/0001213900-24-079866) | DEFA14A |
| [2024-09-18](https://search.stillhousedata.com/proxy/0001213900-24-079608) | DEFA14A |
| [2024-09-18](https://search.stillhousedata.com/proxy/0001213900-24-079586) | DEFA14A |
| [2024-09-17](https://search.stillhousedata.com/proxy/0001213900-24-079139) | DEFA14A |

## More

- [CIK 937556 on SEC EDGAR (source of record)](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=937556&type=&dateb=&owner=include&count=40)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/proxy/0001104659-26-047846.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.