# EDGAR Filing Document

**Accession Number:** 0000937556
**File Stem:** 0001104659-26-072349
**Filing Date:** 2026-6
**Character Count:** 9579
**Document Hash:** 889de840c181d3030a473aa6a72d0e1a
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-072349.hdr.sgml**: 20260610

**ACCESSION NUMBER**: 0001104659-26-072349

**CONFORMED SUBMISSION TYPE**: S-8 POS

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260610

**DATE AS OF CHANGE**: 20260610

**EFFECTIVENESS DATE**: 20260610

**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:** S-8 POS
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-194089
- **FILM NUMBER:** 261079879

**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

**As filed with the Securities and Exchange Commission on June 10, 2026**

**Registration No. 333-240152**

**Registration No. 333-234386**

**Registration No. 333-219207**

**Registration No. 333-194089**

**Registration No. 333-186692**

**Registration No. 333-179557**

**Registration No. 333-168534**

**Registration No. 333-157673**

**Registration No. 333-149138**

**Registration No. 333-148149**

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**Post-Effective Amendment No. 1 to Form S-8 Registration Statement No. 333-240152**

**Post-Effective Amendment No. 1 to Form S-8 Registration Statement No. 333-234386**

**Post-Effective Amendment No. 1 to Form S-8 Registration Statement No. 333-219207**

**Post-Effective Amendment No. 2 to Form S-8 Registration Statement No. 333-194089**

**Post-Effective Amendment No. 1 to Form S-8 Registration Statement No. 333-186692**

**Post-Effective Amendment No. 1 to Form S-8 Registration Statement No. 333-179557**

**Post-Effective Amendment No. 1 to Form S-8 Registration Statement No. 333-168534**

**Post-Effective Amendment No. 1 to Form S-8 Registration Statement No. 333-157673**

**Post-Effective Amendment No. 1 to Form S-8 Registration Statement No. 333-149138**

**Post-Effective Amendment No. 1 to Form S-8 Registration Statement No. 333-148149**

**FORM S-8**

**REGISTRATION STATEMENT**

***UNDER***

***THE SECURITIES ACT OF 1933***

**MASIMO CORPORATION**

(Exact name of registrant as specified in its charter)

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| | |
|:---|:---|
| **Delaware** | **33-0368882** |
| (State or other jurisdiction of incorporation) | (IRS Employer Identification No.) |

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**52 Discovery**

**Irvine, California 92618**

**(949) 297-7000**

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

**Masimo Corporation 2017 Equity Incentive Plan, as amended**

**Masimo Corporation 2007 Stock Incentive Plan**

**Masimo Retirement Savings Plan**

(Full title of the plans)

**Micah Young**

**EVP, Chief Financial Officer**

**Masimo Corporation**

**52 Discovery<br> Irvine, California 92618**

**(949) 297-7000**

(Name and address, including zip code, and telephone number, including area code, of agent for service)

***Copies to*** **:**

**Daniel Wolf, P.C.**

**David M. Klein, P.C.**

**Brian H. Junquera**

**Kirkland & Ellis LLP**

**601 Lexington Avenue**

**New York, New York 10022**

**(212) 446-4800**

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company" and "emerging growth company" in Rule 12b-2 of the Exchange Act.

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| | | | |
|:---|:---|:---|:---|
| Large accelerated filer | x | Accelerated filer | ◻ |
| Non-accelerated filer | ¨ | Smaller reporting company | ¨ |
|  |  | Emerging growth company | ◻ |

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If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

**EXPLANATORY NOTE**

**DEREGISTRATION OF SECURITIES**

This Post-Effective Amendment (the "<u>Post-Effective Amendment</u>") to the following Registration Statements on Form S-8 (collectively, the "<u>Registration Statements</u>") is being filed to withdraw and deregister: all shares of common stock, par value $0.001 per share (the "<u>Common Stock</u>"), of Masimo Corporation (the "<u>Registrant</u>") that had been registered and remain unsold under the Registration Statements, together with any and all plan interests and other securities registered thereunder (note that the share numbers listed below do not take into account corporate actions, such as stock splits, taken in the interim):

&nbsp;&nbsp;&nbsp;&nbsp;· Registration Statement 333-219207, originally
filed by the Registrant with the Securities and Exchange Commission (the " <u>SEC</u> ") on July 7, 2017, and as amended by
Registration Statement 333-240152 on Form S-8, originally filed by the Registrant with the SEC on July 28, 2020, registering
7,500,000 shares of Common Stock under the Masimo Corporation 2017 Equity Incentive Plan (as amended) (the " <u>2017 Plan</u> ").

&nbsp;&nbsp;&nbsp;&nbsp;· Registration Statement 333-149138 on
Form S-8, originally filed by the Registrant with the SEC on February 11, 2008, and as amended by Registration Statement 333-234386 on
Form S-8, originally filed by the Company with the SEC on October 30, 2019, registering (i) 1,250,000 shares of Common
Stock purchased from time to time under the Masimo Retirement Savings Plan (the " <u>401(k) Plan</u> ") by the Trustee (as defined
in the 401(k) Plan) with contributions made by the Registrant and its participating subsidiaries and with salary deferrals by participants
who may elect to invest in the Registrant's Common Stock Fund (as defined in the 401(k) Plan); and (ii) an indeterminate amount
of plan interests issuable under the 401(k) Plan.

&nbsp;&nbsp;&nbsp;&nbsp;· Registration Statement 333-148149 on Form S-8,
originally filed by the Registrant with the SEC on December 19, 2007, as amended by Registration Statement 333-157673 on Form S-8,
originally filed with the SEC on March 4, 2009, as amended by Registration Statement 333-168534 on Form S-8, originally filed with
the SEC on August 4, 2010, as amended by Registration Statement 333-179557 on Form S-8, originally filed with the SEC on February 17,
2012, as amended by Registration Statement 333-186692 on Form S-8, originally filed with the SEC on February 15, 2013, as amended by Registration
Statement 333-194089 on Form S-8, originally filed by the Registrant with the SEC on February 24, 2014, as amended by Post-Effective Amendment
No. 1 on Form S-8, File No. 333-194089, filed with the SEC on July 7, 2017, registering 1,278,627 shares of Common Stock under the Masimo
Corporation 2007 Stock Incentive Plan.

On June 10, 2026, pursuant to the terms of the Agreement and Plan of Merger (the "<u>Merger Agreement</u>"), dated as of February 16, 2026, by and among the Registrant, Danaher Corporation, a Delaware corporation ("<u>Parent</u>"), and Mobius Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent ("<u>Merger Sub</u>"), Merger Sub merged with and into the Registrant (the "<u>Merger</u>"), with the Registrant continuing as the surviving corporation and a wholly owned subsidiary of Parent.

As a result of the transactions contemplated by the Merger Agreement, all offerings of securities registered pursuant to the Registration Statements have been terminated. In accordance with undertakings made by the Registrant in the Registration Statements to remove from registration, by means of a post-effective amendment, any of the securities registered under the Registration Statements that remain unsold at the termination of the respective offering, the Registrant hereby removes from registration all of the securities registered but unsold under the Registration Statements as of the date hereof. The Registration Statements are hereby amended, as appropriate, to reflect the deregistration of such securities, and the Registrant hereby terminates the effectiveness of the Registration Statements.

The foregoing description of the Merger, the Merger Agreement and the transactions contemplated thereby does not purport to be complete and is subject to, and qualified in its entirety by the Merger Agreement, which is included as Exhibit 2.1 in the Registrant's Form 8-K filed with the SEC on February 17, 2026.

**SIGNATURES**

Pursuant to the requirements of the Securities Act of 1933, as amended (the "<u>Securities Act</u>") the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Post-Effective Amendment to the Registration Statements to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Irvine, State of California, on June 10, 2026.

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| | | |
|:---|:---|:---|
| MASIMO CORPORATION | MASIMO CORPORATION | MASIMO CORPORATION |
| By: | /s/ Micah Young | /s/ Micah Young |
|  | Name: | Micah Young |
|  | Title: | EVP, Chief Financial Officer |

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No other person is required to sign this Post-Effective Amendment in reliance upon Rule 478 under the Securities Act.