UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

___________________

FORM SD

Specialized Disclosure Report

___________________

MASIMO CORPORATION

(Exact Name of Registrant as Specified in its Charter)

___________________

Delaware	001-33642	33-0368882
(State or Other Jurisdiction of Incorporation or Organization)	(Commission File Number)	(I.R.S. Employer Identification Number)

52 Discovery Irvine, California	92618
(Address of principal executive offices)	(Zip Code)

Bilal Muhsin

(949) 297-7000

(Name and telephone number, including area code, of the person to contact in connection with this report)

___________________

Check the appropriate box to indicate the rule pursuant to which this form is being filed, and provide the period to which the information in this form applies:
ý	Rule 13p-1 under the Securities Exchange Act (17 CFR 240.13p-1) for the reporting period from January 1 to December 31, 2023.

Section 1	Conflict Minerals Disclosure
Item 1.01	Conflict Minerals Disclosure and Report

A copy of Masimo’s Conflict Minerals Report for the calendar year ended December 31, 2023 is filed herewith as Exhibit 1.01 and is also available on Masimo’s website at: https://investor.masimo.com/governance/governance-documents/default.aspx

Item 1.02 Exhibit

Masimo has filed, as an exhibit to this Form SD, the Conflict Minerals Report required by Item 1.01.

Section 2	Exhibits
Item 2.01	Exhibits
Exhibit  Number	Description of Document
1.01	Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the duly authorized undersigned.

	MASIMO CORPORATION a Delaware corporation
Date: May 23, 2024	By:	/s/ BILAL MUHSIN
		Bilal Muhsin
		Chief Operating Officer