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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
________________________________________________
FORM 8-K
________________________________________________
CURRENT REPORT
Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934
Date of Report (Date of earliest event reported): November 4, 2025
MASIMO CORPORATION
(Exact name of registrant as specified in its charter)
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DE |  | 001-33642 |  | 33-0368882
(State or other jurisdiction of incorporation) |  | (Commission File Number) |  | (IRS Employer Identification No.)
52 Discovery |  | Irvine, |  | CA |  |  |  |  | 92618
(Address of Principal Executive Offices) |  |  |  |  | (Zip Code)
|  |  |  |  |  | (949) | 297-7000 |  |  |
Registrant’s telephone number, including area code:
Not Applicable
(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
☐ | Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐ | Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐ | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2 (b))
☐ | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities Registered pursuant to Section 12(b) of the Act:
Title of each class |  | Trading Symbol(s) |  | Name of each exchange on which registered
Common Stock, $0.001 par value |  | MASI |  | The Nasdaq Stock Market LLC
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933(§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).
Emerging growth company | ☐
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 13(a) of the Exchange Act. | ☐

Item 2.02. | Results of Operations and Financial Condition.

On November 4, 2025, Masimo Corporation (the “Company”) issued a press release announcing its financial results for the quarter ended September 27, 2025. A copy of the press release is furnished as Exhibit 99.1 to this Current Report.
In accordance with General Instruction B.2 of Form 8-K, the information in Item 2.02 of this Current Report on Form 8-K shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liability of that section, and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Item 7.01. | Regulation FD Disclosure.

In c onnection with the Company’s conference call scheduled to be held on November 4, 2025, the Company’s Chief Financial Officer will review supplemental information regarding the Company’s financial results for the third quarter 2025, as well as the Company’s updated outlook for the remainder of fiscal 2025. The Company is making available to investors supplemental financial information by fiscal quarter for fiscal years 2022, 2023 and 2024, along with the first, second and third quarters of 2025, pursuant to the materials furnished as Exhibit 99.2 to this Current Report.
In accordance with General Instruction B.2 of Form 8-K, the information in Item 7.01 of this Current Report on Form 8-K shall not be deemed “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liability of that section, and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Item 9.01. | Financial Statements and Exhibits.

(d) The following items are filed as exhibits to the Current Report on Form 8-K.

Exhibit No. | Description
99.1 | Press Release, Dated November 4, 2025, Reporting Third Quarter 2025 Financial Results
99.2 | Masimo Third Quarter 2025 Supplemental Presentation to Earnings Press Release
104 | Cover Page Interactive Data File (embedded within the Inline XBRL document)

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

|  |  |  | MASIMO CORPORATION
Date: November 4, 2025 |  |  |  | By: |  | /s/ M ICAH Y OUNG
|  |  |  |  |  | Micah Young
|  |  |  |  |  | Executive Vice President & Chief Financial Officer
|  |  |  |  |  | (Principal Financial Officer)