# EDGAR Filing Document

**Accession Number:** 0000937556
**File Stem:** 0000937556-25-000121
**Filing Date:** 2025-8
**Character Count:** 9309
**Document Hash:** 2b2f9ebbc4860f06a6347df445cfc98c
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000937556-25-000121.hdr.sgml**: 20250811

**ACCESSION NUMBER**: 0000937556-25-000121

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20250731

**FILED AS OF DATE**: 20250811

**DATE AS OF CHANGE**: 20250811

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Ahmed Omar
- **CENTRAL INDEX KEY:** 0002077034

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-33642
- **FILM NUMBER:** 251203622

**MAIL ADDRESS:**
- **STREET 1:** 15 HYACINTH
- **CITY:** LAKE FOREST
- **STATE:** CA
- **ZIP:** 92630
**ISSUER**: 

**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:** 0103

**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

## Ex-24

**Exhibit 24**

**POWER OF ATTORNEY**

Know all by these presents, that the undersigned hereby constitutes and appoints each of Micah Young, Craig Johnson and Peter Molnar signing singly, the undersigned's true and lawful attorney-in-fact and agent to:

(1) execute for and on behalf of the undersigned, an officer, director and/or holder of 10% or more of a registered class of securities of Masimo Corporation, a Delaware corporation (the "Company"), Forms 3, 4 and 5 in accordance with Section 16(a) of the Securities Exchange Act of 1934, as amended, and the rules promulgated thereunder;

(2) do and perform any and all acts for and on behalf of the undersigned that may be necessary or desirable to complete and execute any such Form 3, 4 and 5, complete and execute any amendment or amendments thereto, and timely file such forms or amendments with the United States Securities and Exchange Commission and any stock exchange or similar authority, as required; and

(3) take any other action of any nature whatsoever in connection with the foregoing which, in the opinion of any such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact's discretion.

The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is the Company assuming, any of the undersigned's responsibilities to comply with Section 16 of the Securities Exchange Act of 1934, as amended.

This Power of Attorney shall remain in full force and effect with respect to the undersigned until the earliest to occur of (a) such date that the undersigned is no longer required to file Forms 3, 4 and 5 with respect to the undersigned's holdings of and transactions in securities issued by the Company, or (b) the revocation by the undersigned in a signed writing delivered to the Company and the foregoing attorneys-in-fact. This Power of Attorney shall terminate with respect to each of the foregoing attorneys-in-fact at such time as such attorney-in-fact is no longer employed by the Company or any of its subsidiaries.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 16th day of July, 2025.

<u>/s/ O</u><u>MAR</u> <u>A</u><u>HMED</u> 

Signature

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Ahmed Omar<br><sub>(Last) (First) (Middle)</sub><br>C/O MASIMO CORPORATION<br>52 DISCOVERY<br><sub>(Street)</sub><br>IRVINE, CA 92618<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>MASIMO CORP [ MASI ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2025-07-31 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director   [ ] 10% Owner<br>[X] Officer (give title below)   [ ] Other (specify below)<br>_CTIO & EVP of Engineering_ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |
| Common Stock | 1768 | D |  |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| Restricted Stock Units | <sup>(1)</sup> | 2035-08-05 | Common Stock | 1231 | <sup>(2)</sup> | D |  |
| Restricted Stock Units | <sup>(3)</sup> | 2035-03-13 | Common Stock | 6638 | <sup>(2)</sup> | D |  |
| Restricted Stock Units | <sup>(4)</sup> | 2034-11-13 | Common Stock | 2474 | <sup>(2)</sup> | D |  |
| Restricted Stock Units | <sup>(5)</sup> | 2033-12-04 | Common Stock | 10745 | <sup>(2)</sup> | D |  |
| Restricted Stock Units | <sup>(6)</sup> | 2033-03-21 | Common Stock | 4578 | <sup>(2)</sup> | D |  |
| Restricted Stock Units | <sup>(7)</sup> | 2032-03-21 | Common Stock | 5078 | <sup>(2)</sup> | D |  |
| Restricted Stock Units | <sup>(8)</sup> | 2031-03-22 | Common Stock | 1316 | <sup>(2)</sup> | D |  |

---

### Footnotes:

(1) This RSU award was granted on July 7, 2025 and will vest ratably over five years, with 20% of the award vesting on each anniversary of the grant date.

(2) Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of the Issuer upon vesting of the RSU.

(3) This RSU award was granted on March 13, 2025 and will vest ratably over five years, with 20% of the award vesting on each anniversary of the grant date.

(4) This RSU award was granted on November 13, 2024 and will vest in full on  the first anniversary of the grant date.

(5) This RSU award was granted on November 16, 2023 and will vest ratably over five years, with 20% of the award vesting on each anniversary of the grant date.

(6) This RSU award was granted on March 8, 2023 and will vest ratably over five years, with 20% of the award vesting on each anniversary of the grant date.

(7) This RSU award was granted on February 22, 2022 and will vest ratably over five years, with 20% of the award vesting on each anniversary of the grant date.

(8) This RSU award was granted on February 26, 2021 and will vest ratably over five years, with 20% of the award vesting on each anniversary of the grant date.

**Remarks:**
EX-24 - Power of Attorney

**Signature:** /s/ Micah W. Young, Attorney-In-Fact  
**Date:** 2025-08-11

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**