# EDGAR Filing Document

**Accession Number:** 0000937556
**File Stem:** 0001104659-26-076448
**Filing Date:** 2026-6
**Character Count:** 3770
**Document Hash:** 3014e3fbdb4b8a9bcc43d64b7df6c17d
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-076448.hdr.sgml**: 20260622

**ACCESSION NUMBER**: 0001104659-26-076448

**CONFORMED SUBMISSION TYPE**: 15-12G

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260622

**DATE AS OF CHANGE**: 20260622

**EFFECTIVENESS DATE**: 20260622

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MASIMO CORP
- **CENTRAL INDEX KEY:** 0000937556
- **STANDARD INDUSTRIAL CLASSIFICATION:** ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS [3845]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 330368882
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0102

**FILING VALUES:**
- **FORM TYPE:** 15-12G
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-33642
- **FILM NUMBER:** 261107882

**BUSINESS ADDRESS:**
- **STREET 1:** 52 DISCOVERY
- **CITY:** IRVINE
- **STATE:** CA
- **ZIP:** 92618
- **BUSINESS PHONE:** 949-297-7000

**MAIL ADDRESS:**
- **STREET 1:** 52 DISCOVERY
- **CITY:** IRVINE
- **STATE:** CA
- **ZIP:** 92618

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**FORM 15**

**CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION**

**UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934**

**OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d)**

**OF THE SECURITIES EXCHANGE ACT OF 1934.**

**Commission File Number: 001-33642**

**Masimo Corporation**

(Exact name of registrant as specified in its charter)

**52 Discovery**

**Irvine, CA 92618**

**(949) 297-7000**

(Address, including zip code, and telephone number, including area code, of registrant's principal executive offices)

**Common Stock, $0.001 par value**

(Title of each class of securities covered by this Form)

**None**

(Titles of all other classes of securities for which a duty to file reports under section 13(a) or 15(d) remains)

Please place an X in the box(es) to designate the appropriate rule provision(s) relied upon to terminate or suspend the duty to file reports:

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| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp;&nbsp;Rule 12g-4(a)(1) | ⌧ |
| &nbsp;&nbsp;&nbsp;&nbsp;Rule 12g-4(a)(2) | ◻ |
| &nbsp;&nbsp;&nbsp;&nbsp;Rule 12h-3(b)(1)(i) | ⌧ |
| &nbsp;&nbsp;&nbsp;&nbsp;Rule 12h-3(b)(1)(ii) | ◻ |
| &nbsp;&nbsp;&nbsp;&nbsp;Rule 15d-6 | ◻ |
| &nbsp;&nbsp;&nbsp;&nbsp;Rule 15d-22(b) | ◻ |

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Approximate number of holders of record as of the certification or notice date:

Common Stock: 1\*

\* Explanatory Note: Effective as of June 10, 2026 (the "<u>Closing Date</u>"), Danaher Corporation, a Delaware corporation ("<u>Parent</u>"), completed the previously announced acquisition of Masimo Corporation, a Delaware corporation (the "<u>Company</u>"), pursuant to the Agreement and Plan of Merger, dated as of February 16, 2026 (the "<u>Merger Agreement</u>"), by and among the Company, Parent, and Mobius Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent ("<u>Merger Sub</u>"). Pursuant to the terms of the Merger Agreement, on the Closing Date, Merger Sub merged with and into the Company (the "<u>Merger</u>"), with the Company surviving the Merger as a wholly owned subsidiary of Parent. This Form 15 relates solely to the reporting obligations of the Company under the Securities Exchange Act of 1934, as amended, and does not affect the reporting obligations of Parent under the Exchange Act.

Pursuant to the requirements of the Securities Exchange Act of 1934, Masimo Corporation has caused this certification/notice to be signed on its behalf by the undersigned duly authorized person.

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| | | |
|:---|:---|:---|
|  | **MASIMO CORPORATION** | **MASIMO CORPORATION** |
| Date: June 22, 2026 | By: | /s/ Micah Young |
|  | Name: | Micah Young |
|  | Title: | EVP, Chief Financial Officer |

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