MASI / Masimo Corporation - تصريحات هيئة الأوراق المالية والبورصات، التقرير السنوي، بيان الوكيل

شركة ماسيمو
US ˙ NasdaqGS ˙ US5747951003

الإحصائيات الأساسية
LEI 549300Q4A8JK0PIYCU29
CIK 937556
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Masimo Corporation
SEC Filings (Chronological Order)
توفر هذه الصفحة قائمة كاملة ومرتبة ترتيبًا زمنيًا لتصريحات هيئة الأوراق المالية والبورصات، باستثناء تصريحات الملكية التي نقدمها في مكان آخر.
August 19, 2025 8-K

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): August 18, 2025 MASIMO CORPORATIO

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): August 18, 2025 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Numbe

August 5, 2025 EX-10.2

Offer letter, by and between Masimo Corporation and Lisa Hellmann, dated March 24, 2025.

March 24, 2025 Elisabeth Hellmann Via electronic mail Dear Lisa: It is with great pleasure that we offer you the position of Chief Human Resources Officer (“CHRO”) of Masimo Corporation (the “Company”), effective April 21, 2025 (the “Start Date”).

August 5, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 28, 2025 ☐ TRANSITION REPORT PU

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 28, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001

August 5, 2025 EX-10.3

Offer letter, by and between Masimo Corporation and Tim Benner, dated April 25, 2025.

April 25, 2025 Tim Benner Via electronic mail Dear Tim: It is with great pleasure that we offer you the position of Chief Marketing and Strategy Officer of Masimo Corporation (the “Company”), effective June 16, 2025 (the “Start Date”).

August 5, 2025 EX-99.1

Masimo Reports Second Quarter 2025 Results

Exhibit 99.1 Masimo Reports Second Quarter 2025 Results Irvine, California, August 5, 2025 - Masimo Corporation (Nasdaq: MASI) today announced its financial results for the second quarter ended June 28, 2025. Second Quarter 2025 Results From Continuing Operations(1): ■ GAAP revenue of $371 million, representing 8% growth on a reported basis; ■ Non-GAAP revenue of $370 million, representing 7% grow

August 5, 2025 8-K

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): August 5, 2025 MASIMO CORPORATION

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): August 5, 2025 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Number

August 5, 2025 EX-99.2

Second Quarter 2025 Earnings August 5, 2025 1 146 26 31 73 74 76 246 208 209 165 209 164 197 36 42 148 149 152 Safe Harbor Statement Forward-Looking Statements: This presentation contains forward-looking statements within the meaning of federal secur

masi-q22025earningspres Second Quarter 2025 Earnings August 5, 2025 1 146 26 31 73 74 76 246 208 209 165 209 164 197 36 42 148 149 152 Safe Harbor Statement Forward-Looking Statements: This presentation contains forward-looking statements within the meaning of federal securities laws, including, among others, statements about our expectations, plans, strategies or prospects.

June 26, 2025 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One) ý ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-33642 A. Full t

June 12, 2025 8-K

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): June 6, 2025 MASIMO CORPORATION (

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): June 6, 2025 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Number)

May 27, 2025 EX-1.01

Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form.

Exhibit 1.01 Masimo Corporation Conflict Minerals Report For the Calendar Year Ended December 31, 2024 Masimo Corporation (Masimo, the Company, we, us or our) is filing this Conflict Minerals Report (this Report) in compliance with Rule 13p-1 of the Securities Exchange Act of 1934, as amended (Rule 13p-1), for the calendar year ended December 31, 2024; and pursuant to Section 1502 of the Dodd-Fran

May 27, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events

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): May 27, 2025 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Number)

May 27, 2025 SD

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 Inco

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 principa

May 7, 2025 EX-10.1

Stock Purchase Agreement, dated May 6, 2025, by and between Masimo Corporation and Harman International Industries, Incorporated*

Exhibit 10.1 STOCK PURCHASE AGREEMENT by and between MASIMO CORPORATION and HARMAN INTERNATIONAL INDUSTRIES, INCORPORATED dated as of May 6, 2025 TABLE OF CONTENTS Page Article I Certain definitions 1 Section 1.1 Definitions 1 Article II PURCHASE AND SALE; Closing; Closing deliverables 19 Section 2.1 Purchase and Sale of the Shares 19 Section 2.2 Closing of the Transactions 19 Section 2.3 Deliveri

May 7, 2025 8-K/A

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K/A CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 6, 2025 MASIMO CORPORATION (Exact name of registrant as specified in its charter) Delaware 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File N

May 6, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 29, 2025 ☐ TRANSITION REPORT P

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 29, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 00

May 6, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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): May 6, 2025 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Number) (

May 6, 2025 EX-99.1

Masimo to Sell Consumer Audio Business to HARMAN International Divestiture Supports Masimo’s Focus on Core Professional Healthcare Business and Delivering Market Leading Innovation

Exhibit 99.1 Masimo to Sell Consumer Audio Business to HARMAN International Divestiture Supports Masimo’s Focus on Core Professional Healthcare Business and Delivering Market Leading Innovation IRVINE, Calif.—May 6, 2025—Masimo Corporation (Nasdaq: MASI), a leading global medical innovator, today announced that it has entered into a definitive agreement to sell its Sound United consumer audio busi

May 6, 2025 8-K

Other Events

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): May 6, 2025 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Number) (

May 6, 2025 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

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): May 6, 2025 MASIMO CORPORATION (Exact name of registrant as specified in its charter) Delaware 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Num

May 6, 2025 EX-99.1

Masimo Reports First Quarter 2025 Results

Exhibit 99.1 Masimo Reports First Quarter 2025 Results Irvine, California, May 6, 2025 - Masimo Corporation (Nasdaq: MASI) today announced its financial results for the first quarter ended March 29, 2025. First Quarter 2025 Results From Continuing Operations(1): ■ GAAP revenue of $372 million, representing 10% on a reported basis; ■ Non-GAAP revenue of $371 million, representing 10% on a constant

May 6, 2025 EX-99.2

First Quarter 2025 Earnings May 6, 2025 1 Safe Harbor Statement Forward-Looking Statements: This presentation contains forward-looking statements within the meaning of federal securities laws, including, among others, statements about our expectation

First Quarter 2025 Earnings May 6, 2025 1 Safe Harbor Statement Forward-Looking Statements: This presentation contains forward-looking statements within the meaning of federal securities laws, including, among others, statements about our expectations, plans, strategies or prospects.

April 30, 2025 8-K

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): April 29, 2025 MASIMO CORPORATION

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): April 29, 2025 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Number

March 26, 2025 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Defi

February 26, 2025 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-3 (Form Type) Masimo Corporation (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title(1) Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price per Unit Proposed Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective Date Filing Fee Previously Paid in Connection with Unsold Securities to be Carried Forward Fees to Be Paid Debt Debt Securities Rule 456(b) and Rule 457(r)(2) (3) (3) (3) (2) (2) Equity Common Stock, par value $0.

February 26, 2025 EX-4.4

Form of Indenture.

Exhibit 4.4 Masimo Corporation INDENTURE Dated as of [ ] [ ] Trustee TABLE OF CONTENTS Page ARTICLE I. DEFINITIONS AND INCORPORATION BY REFERENCE............. 1 Section 1.1. Definitions.............................................................................................. 1 Section 1.2. Other Definitions.................................................................................... 3 S

February 26, 2025 S-3ASR

As filed with the Securities and Exchange Commission on February 25, 2025

As filed with the Securities and Exchange Commission on February 25, 2025 Registration No.

February 25, 2025 EX-10.27

Third Amendment to Settlement Agreement and Release of Claims, dated as of September 1, 2016, by and among Masimo Corporation and Cercacor Laboratories, Inc., and Medtronic Plc., Covidien LP, Nellcor Puritan Bennett LLC and Covidien Holdings Inc.

Exhibit 10.27 ***Certain identified information has been excluded from the exhibit because it both (i) is not material and (ii) is the type that the company treats as private or confidential. Such omitted information is indicated by brackets (“[...***...]”) in this exhibit.*** SETTLEMENT AGREEMENT AND RELEASE OF CLAIMS This Settlement Agreement and Release of Claims (the “Settlement Agreement”) is

February 25, 2025 EX-99.2

Fourth Quarter and Full Year 2024 Earnings February 25, 2025 1 146 26 31 73 74 76 246 208 209 165 209 164 197 36 42 148 149 152 Safe Harbor Statement Forward-Looking Statements: This presentation contains forward-looking statements within the meaning

Fourth Quarter and Full Year 2024 Earnings February 25, 2025 1 146 26 31 73 74 76 246 208 209 165 209 164 197 36 42 148 149 152 Safe Harbor Statement Forward-Looking Statements: This presentation contains forward-looking statements within the meaning of federal securities laws, including, among others, statements about our expectations, plans, strategies or prospects.

February 25, 2025 POSASR

As filed with the Securities and Exchange Commission on February 25, 2025

As filed with the Securities and Exchange Commission on February 25, 2025 Registration No.

February 25, 2025 EX-21.1

List of Registrant’s Subsidiaries

Exhibit 21.1 Subsidiaries of the Registrant - 2024 The following are wholly-owned subsidiaries of the registrant, Masimo Corporation, a Delaware corporation: Name of Subsidiary State or Jurisdiction of Incorporation or Organization Masimo Americas, Inc. Delaware Masimo de Mexico Holdings I LLC Delaware Masimo de Mexico Holdings II LLC Delaware Masimo Holdings LLC Delaware SpO2.com, Inc. Delaware S

February 25, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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): February 25, 2025 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Num

February 25, 2025 EX-99.1

Masimo Reports Fourth Quarter and Full-Year 2024 Financial Results and Provides Updated Full-Year 2025 Guidance

Exhibit 99.1 Masimo Reports Fourth Quarter and Full-Year 2024 Financial Results and Provides Updated Full-Year 2025 Guidance Irvine, California, February 25, 2025 - Masimo (Nasdaq: MASI) today announced its financial results for the fourth quarter and full-year ended December 28, 2024 and provided updated estimates for its full-year 2025 guidance. Fourth Quarter 2024 Financial Results: ■ Consolida

February 25, 2025 EX-19

Insider Trading Po

Exhibit 19 MASIMO CORPORATION INSIDER TRADING POLICY AND GUIDELINES WITH RESPECT TO CERTAIN TRANSACTIONS IN COMPANY SECURITIES This Insider Trading Policy (this “Policy”) provides guidelines to employees, officers and directors of Masimo Corporation and each of its subsidiaries and branches (collectively, the “Company”) with respect to transactions in the Company’s securities.

February 25, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 28, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-336

February 19, 2025 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Other Events, Shareholder Director Nominations

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): February 12, 2025 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Num

February 19, 2025 EX-3.1

Sixth Amended and Restated Bylaws of Masimo Corporation dated February 12, 2025 (incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K filed with the Securities and Exchange Commission on February 19, 2025).

Exhibit 3.1 MASIMO CORPORATION SIXTH AMENDED AND RESTATED BYLAWS Amended and Restated: February 12, 2025 ARTICLE I - STOCKHOLDERS Section 1.       Annual Meeting. (1) An annual meeting of the stockholders, for the election of directors to succeed those whose terms expire and for the transaction of such other business as may properly come before the meeting, shall be held at such place, on such dat

February 7, 2025 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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): February 6, 2025 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Numb

January 31, 2025 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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): January 30, 2025 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Numb

January 31, 2025 EX-99.1

January 30, 2025

Exhibit 99.1 January 30, 2025 Via E-mail Masimo Corporation 52 Discovery Irvine, CA 92618 Attn: Tom McClenahan, Executive Vice President, General Counsel and Corporate Secretary Re: Resignation as a Director of Masimo Corporation Dear Corporate Secretary: Pursuant to Article II, Section 3 of the Fifth Amended and Restated Bylaws of Masimo Corporation (the “Company”), effective as of the commenceme

January 21, 2025 EX-99.1

Masimo Announces Leadership Transition Katie Szyman Appointed Chief Executive Officer and to Board of Directors Interim CEO Michelle Brennan Named Chairman of Masimo’s Board

Exhibit 99.1 Masimo Announces Leadership Transition Katie Szyman Appointed Chief Executive Officer and to Board of Directors Interim CEO Michelle Brennan Named Chairman of Masimo’s Board IRVINE, Calif. – January 21, 2025 – Today the Board of Directors (the “Board”) of Masimo (NASDAQ: MASI), a leading global medical innovator, announced that Katie Szyman has been appointed the next Chief Executive

January 21, 2025 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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): January 17, 2025 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Numb

January 21, 2025 EX-10.1

Offer letter, by and between Masimo Corporation and Catherine Szyman, dated January 17, 2025 (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed with the Securities and Exchange Commission on January 21, 2025).

Exhibit 10.1 January 17, 2025 Catherine Szyman Via electronic mail Dear Katie: It is with great pleasure that we offer you the position of Chief Executive Officer (“CEO”) of Masimo Corporation (the “Company”), effective February 12, 2025 (the “Start Date”). This letter (this “Offer Letter”) sets forth the principal terms and conditions of your employment with Masimo. Duties and Responsibilities: D

January 16, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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): January 16, 2025 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Numb

January 16, 2025 EX-99.2

2025 J.P. Morgan Healthcare Conference January 16, 2025 146 26 31 73 74 76 246 208 209 16520 9164 197 36 42 148 149 152 2 Safe Harbor Statement Forward-Looking Statements: This presentation contains forward-looking statements within the meaning of fe

2025 J.P. Morgan Healthcare Conference January 16, 2025 146 26 31 73 74 76 246 208 209 16520 9164 197 36 42 148 149 152 2 Safe Harbor Statement Forward-Looking Statements: This presentation contains forward-looking statements within the meaning of federal securities laws, including, among others, statements about our expectations, plans, strategies or prospects. We generally use the words “may,” “

January 16, 2025 EX-99.1

Masimo Announces Select Preliminary 2024 Financial Results and 2025 Guidance Complete fourth quarter and full-year 2024 financial results will be announced on Tuesday, February 25, 2025

Exhibit 99.1 Masimo Announces Select Preliminary 2024 Financial Results and 2025 Guidance Complete fourth quarter and full-year 2024 financial results will be announced on Tuesday, February 25, 2025 Irvine, California, January 16, 2025 - Masimo Corporation (Nasdaq: MASI) today announced select preliminary financial results for the fourth quarter and full-year ended December 28, 2024 and provided e

November 18, 2024 EX-10.1

Employment Agreement, by and between Masimo Corporation and Michelle Brennan, dated November 11, 2024

Exhibit 10.1 EMPLOYMENT AGREEMENT This Employment Agreement (the “Agreement”) is entered into by and between Masimo Corporation (the “Company”) and Michelle Brennan (“Executive”) (together, the “Parties” and individually, a “Party”) as of the date Executive signs this Agreement. WHEREAS, Executive wishes to be employed by the Company, and the Company wishes to secure the employment of Executive, u

November 18, 2024 8-K

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 13, 2024 MASIMO CORPORAT

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 13, 2024 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Num

November 18, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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 13, 2024 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Num

November 6, 2024 EX-10.5

Mizuho Loan Agreement dated September 30, 2024, between D&M Holdings, Inc., as the Borrower, and Mizuho Bank Ltd., as Lender

Exhibit 10.3 Loan Agreement Mizuho Bank, Ltd. I (hereinafter referred to as the “Obligor”), after acknowledging each of the terms and conditions of the agreement on bank transactions separately entered into with Mizuho Bank, Ltd. (hereinafter referred to as the “Bank”) and this agreement, undertake to repay the principal and pay interest and other obligations to the Bank in accordance with this ag

November 6, 2024 EX-21.1

List of Registrant’s Subsidiaries

Exhibit 21.1 Subsidiaries of the Registrant The following are wholly-owned subsidiaries of the registrant, Masimo Corporation, a Delaware corporation: Name of Subsidiary State or Jurisdiction of Incorporation or Organization Masimo Americas, Inc. Delaware Masimo de Mexico Holdings I LLC Delaware Masimo de Mexico Holdings II LLC Delaware Masimo Holdings LLC Delaware SpO2.com, Inc. Delaware SEDLine,

November 6, 2024 EX-10.4

Agreement on Fees Pertaining to Syndicate Loan dated September 24, 2024 between D&M Holdings Inc. as the Borrower, and The Shoko Chukin Bank, Ltd. and others as the Participating Financial Institutions

*** Certain identified information has been omitted from this exhibit because it is both (i) not material and (ii) of the type that the Registrant treats as private or confidential.

November 6, 2024 EX-3.5

Second Amendment to Fifth Amended and Restated Bylaws adopted

Exhibit 3.5 Second Amendment to the Fifth Amended and Restated Bylaws of Masimo Corporation Effective October 31, 2024 Article II, Section 5 of the Fifth Amended and Restated Bylaws of Masimo Corporation is hereby amended and restated as set forth below: “Section 5.       Special Meetings. Special meetings of the Board of Directors may be called by the Chairman of the Board, the Chief Executive Of

November 6, 2024 EX-10.1

entered into by and between I

Exhibit 10.1 TERCER CONVENIO MODIFICATORIO que celebran por una parte, INMOBILIARIA IAMSA, S.A. DE C.V., representada en este acto por el señor Eduardo Mendoza Larios en lo sucesivo referido como el ARRENDADOR, e INDUSTRIAL VALLERA DE MEXICALI, S.A. DE C.V., representada en este acto por Antonia Patricia Cruz Casanova, en lo sucesivo referido como el “ARRENDATARIO”, con la comparecencia y consenti

November 6, 2024 EX-10.6

izuho Loan Agreement Pr

*** Certain identified information has been omitted from this exhibit because it is both (i) not material and (ii) of the type that the Registrant treats as private or confidential.

November 6, 2024 EX-10.3

as the Borrower, and The Shoko Chukin Bank, Ltd., as Agent, and The Ashikaga Bank, Ltd.

*** Certain identified information has been omitted from this exhibit because it is both (i) not material and (ii) of the type that the Registrant treats as private or confidential.

November 6, 2024 EX-10.2

Consent, dated September 18, 2024, by and between Masimo Corporation and Citibank as

Exhibit 10.2 CONSENT This Consent (this “Consent”), is entered into in connection with that certain Credit Agreement, dated as of April 11, 2022 (as amended, restated, amended and restated, supplemented or otherwise modified from time to time prior to the date hereof, including all Schedules and Exhibits thereto, the “Credit Agreement”), by and among MASIMO CORPORATION, a Delaware corporation (the

November 6, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 28, 2024 ☐ TRANSITION REPO

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 28, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Numbe

November 5, 2024 EX-99.2

Third Quarter 2024 Earnings November 5, 2024 1 Safe Harbor Statement Forward-Looking Statements: This presentation contains forward-looking statements within the meaning of federal securities laws, including, among others, statements about our expect

Third Quarter 2024 Earnings November 5, 2024 1 Safe Harbor Statement Forward-Looking Statements: This presentation contains forward-looking statements within the meaning of federal securities laws, including, among others, statements about our expectations, plans, strategies or prospects.

November 5, 2024 EX-99.1

Masimo Reports Third Quarter 2024 Financial Results

Exhibit 99.1 Masimo Reports Third Quarter 2024 Financial Results Third Quarter 2024 Highlights: • Healthcare revenue of $343.3 million increased 11.5% on a reported basis and 11.7% on a constant currency basis(1); • GAAP net income per diluted share was $0.18; and • Non-GAAP(1) net income per diluted share was $0.98. Irvine, California, November 5, 2024 - Masimo Corporation (Nasdaq: MASI) today an

November 5, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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 5, 2024 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Numb

October 29, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Results of Operations and Financial Condition

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): October 24, 2024 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Numb

October 18, 2024 EX-99.1

Masimo Appoints Timothy Scannell and Wendy Lane to Board of Directors Mr. Scannell and Ms. Lane will Add Valuable Medical Technology, Finance and Corporate Governance Experience to Expanded Eight-Member Board

Exhibit 99.1 Masimo Appoints Timothy Scannell and Wendy Lane to Board of Directors Mr. Scannell and Ms. Lane will Add Valuable Medical Technology, Finance and Corporate Governance Experience to Expanded Eight-Member Board IRVINE, Calif.—October 18, 2024—Masimo Corporation (Nasdaq: MASI), a leading global medical innovator, today announced the appointments of Timothy J. Scannell and Wendy E. Lane t

October 18, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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): October 16, 2024 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Numb

September 25, 2024 SC 13D/A

MASI / Masimo Corporation / Politan Capital Management LP - SC 13D/A Activist Investment

SC 13D/A 1 tm2424680d1sc13da.htm SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No. 15)* Masimo Corporation (Name of Issuer) Common Stock, par value $0.001 p

September 25, 2024 EX-99.1

Masimo Provides Leadership and Business Updates Appoints Michelle Brennan as Interim CEO Following Joe Kiani’s Decision to Resign Continues to Be Committed to Review of Strategic Alternatives for Consumer Businesses, With Assistance From Leading Fina

Exhibit 99.1 Masimo Provides Leadership and Business Updates Appoints Michelle Brennan as Interim CEO Following Joe Kiani’s Decision to Resign Continues to Be Committed to Review of Strategic Alternatives for Consumer Businesses, With Assistance From Leading Financial and Legal Advisors Reaffirms Financial Guidance for Third Quarter 2024 IRVINE, Calif.—Today the Board of Directors (the “Board”) of

September 25, 2024 8-K

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): September 25, 2024, (September 19

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): September 25, 2024, (September 19, 2024) MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporatio

September 19, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

September 18, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

September 18, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

September 18, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☐ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

September 18, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

September 18, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

September 17, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

September 17, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

September 17, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

September 16, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

September 16, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

September 16, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

September 13, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

September 13, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☐ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

September 12, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

September 12, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

September 12, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

September 12, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

September 9, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

DEFA14A 1 ea0213935-defa14amasimo.htm DEFINITIVE ADDITIONAL MATERIALS UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confi

September 9, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

September 9, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

September 9, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

September 6, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

September 6, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

September 4, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

September 4, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

September 3, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

August 30, 2024 EX-99.15

Issuer’s Amended Complaint, filed August 26, 2024

EX-99.15 2 tm2423143d2ex99-15.htm EXHIBIT 99.15 Exhibit 99.15

August 30, 2024 EX-99.17

Politan Supplemental Proxy Materials, filed August 30, 2024

EX-99.17 4 tm2423143d2ex99-17.htm EXHIBIT 99.17 Exhibit 99.17 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Co

August 30, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

August 30, 2024 EX-99.16

Issuer’s Preliminary Injunction Motion, filed August 23, 2024

EX-99.16 3 tm2423143d2ex99-16.htm EXHIBIT 99.16 Exhibit 99.16

August 30, 2024 SC 13D/A

MASI / Masimo Corporation / Politan Capital Management LP - SC 13D/A Activist Investment

SC 13D/A 1 tm2423143d2sc13da.htm SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No. 14)* Masimo Corporation (Name of Issuer) Common Stock, par value $0.001 p

August 28, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

August 27, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

August 26, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

August 22, 2024 DEFR14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 2)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 2) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Defi

August 16, 2024 8-K

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): August 16, 2024 MASIMO CORPORATIO

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): August 16, 2024 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Numbe

August 15, 2024 DEFR14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Defi

August 15, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

August 7, 2024 EX-21.1

List of Registrant’s Subsidiaries

Exhibit 21.1 Subsidiaries of the Registrant The following are wholly-owned subsidiaries of the registrant, Masimo Corporation, a Delaware corporation: Name of Subsidiary State or Jurisdiction of Incorporation or Organization Masimo Americas, Inc. Delaware Masimo de Mexico Holdings I LLC Delaware Masimo de Mexico Holdings II LLC Delaware Masimo Holdings LLC Delaware SpO2.com, Inc. Delaware SEDLine,

August 7, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 29, 2024 ☐ TRANSITION REPORT PU

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 29, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001

August 6, 2024 EX-99.3

© 2019 Masimo Non-GAAP Measures, Adjustments and Definitions Updated August 6, 2024 © 2019 Masimo Forward-Looking Statements Masimo Corporation (“Masimo”, “MASI”, or the “Company”) cautions you that statements included in this presentation that are n

© 2019 Masimo Non-GAAP Measures, Adjustments and Definitions Updated August 6, 2024 © 2019 Masimo Forward-Looking Statements Masimo Corporation (“Masimo”, “MASI”, or the “Company”) cautions you that statements included in this presentation that are not a description of historical facts are forward-looking statements that involve risks, uncertainties, assumptions and other factors which, if they do not materialize or prove correct, could cause the Company’s results to differ materially and adversely from historical results or those expressed or implied by such forward-looking statements.

August 6, 2024 EX-99.1

Masimo Reports Second Quarter 2024 Financial Results

Exhibit 99.1 Masimo Reports Second Quarter 2024 Financial Results Second Quarter 2024 Highlights: • Consolidated revenue was $496.3 million; • Healthcare revenue was $343.9 million; • Non-healthcare revenue was $152.4 million; • GAAP net income per diluted share was $0.29; and • Non-GAAP net income per diluted share was $0.86. Irvine, California, August 6, 2024 - Masimo Corporation (Nasdaq: MASI)

August 6, 2024 DFRN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1) Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confid

August 6, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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): August 6, 2024 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Number

August 6, 2024 EX-99.2

Second Quarter 2024 Earnings August 6, 2024 1 Safe Harbor Statement This presentation contains forward-looking statements within the meaning of federal securities laws, including, among others, statements about our expectations, plans, strategies or

Second Quarter 2024 Earnings August 6, 2024 1 Safe Harbor Statement This presentation contains forward-looking statements within the meaning of federal securities laws, including, among others, statements about our expectations, plans, strategies or prospects.

July 24, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

July 23, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

July 19, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

July 17, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

July 17, 2024 SC 13D/A

MASI / Masimo Corporation / Politan Capital Management LP - SC 13D/A Activist Investment

SC 13D/A 1 tm2419696d1sc13da.htm SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No. 13)* Masimo Corporation (Name of Issuer) Common Stock, par value $0.001 p

July 16, 2024 EX-99.1

Masimo Files Complaint Seeking Injunction Requiring Politan to Correct Material Misstatements

Exhibit 99.1 Masimo Files Complaint Seeking Injunction Requiring Politan to Correct Material Misstatements IRVINE, Calif. – July 16, 2024 (BUSINESS WIRE) – Masimo Corporation (“Masimo” or the “Company”) (Nasdaq: MASI), a global leader in noninvasive monitoring technologies and audio products, today announced that it has commenced litigation against Politan Capital Management LP (“Politan”) in fede

July 16, 2024 8-K

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): July 16, 2024 (July 15, 2024) MAS

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): July 16, 2024 (July 15, 2024) MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commiss

July 16, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

July 15, 2024 SC 13D/A

MASI / Masimo Corporation / Politan Capital Management LP - SC 13D/A Activist Investment

SC 13D/A 1 tm2419446d1sc13da.htm SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No. 12)* Masimo Corporation (Name of Issuer) Common Stock, par value $0.001 p

July 15, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

July 15, 2024 EX-99.14

Politan Letter, dated July 15, 2024

EX-99.14 2 tm2419446d1ex99-14.htm EXHIBIT 99.14 Exhibit 99.14 106 West 56th Street, 10th Floor New York, New York 10019 July 15, 2024 Via Email The Board of Directors c/o Masimo Corporation 52 Discovery Irvine, CA 92618 Re: Resetting the Record Date Dear Members of the Board: We are writing in response to Mr. Kiani’s accusation that Politan has confused stockholders, and therefore the Masimo Board

July 15, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

July 15, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

July 12, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

July 12, 2024 SC 13D/A

MASI / Masimo Corporation / Politan Capital Management LP - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No. 11)* Masimo Corporation (Name of Issuer) Common Stock, par value $0.001 per share (Title of Class of Securities) 57

July 12, 2024 EX-99.13

Politan Letter, dated July 12, 2024

EX-99.13 2 tm2419401d2ex99-13.htm EXHIBIT 99.13 Exhibit 99.13 106 West 56th Street, 10th Floor New York, New York 10019 July 12, 2024 Via Email The Board of Directors c/o Masimo Corporation 52 Discovery Irvine, CA 92618 Re: Letter to Board of Directors on behalf of Politan Capital Management LP Dear Members of the Board: Last week I raised serious concerns about an empty voting scheme we believe i

July 11, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

July 11, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

July 9, 2024 EX-99.2

Preliminary Second Quarter 2024 Revenue and Select Financial Results July 9, 2024 2 Safe Harbor Statement This presentation contains forward-looking statements within the meaning of federal securities laws, including, among others, statements about o

Preliminary Second Quarter 2024 Revenue and Select Financial Results July 9, 2024 2 Safe Harbor Statement This presentation contains forward-looking statements within the meaning of federal securities laws, including, among others, statements about our expectations, plans, strategies or prospects.

July 9, 2024 8-K

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): July 9, 2024 MASIMO CORPORATION (

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): July 9, 2024 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Number)

July 9, 2024 EX-99.1

Masimo Announces Preliminary Second Quarter 2024 Revenue and Select Financial Results

Exhibit 99.1 Masimo Announces Preliminary Second Quarter 2024 Revenue and Select Financial Results Irvine, California, July 9, 2024 - Masimo Corporation (Nasdaq: MASI) today announced preliminary revenue and select financial results for the second quarter ended June 29, 2024. Preliminary Second Quarter 2024 Revenue and Select Financial Results: •Consolidated revenue is expected to be approximately

July 8, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

July 8, 2024 EX-99.12

Politan Letter, dated July 3, 2024

Exhibit 99.12 106 West 56th Street, 10th Floor New York, New York 10019 July 3, 2024 Via Email, U.S. Mail and Federal Express The Board of Directors c/o Masimo Corporation 52 Discovery Irvine, CA 92618 Re:        Empty Voting Dear Members of the Masimo Board of Directors: I am writing this letter to express serious concerns regarding a possible ongoing scheme to manipulate the outcome of the upcom

July 8, 2024 SC 13D/A

MASI / Masimo Corporation / Politan Capital Management LP - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No. 10)* Masimo Corporation (Name of Issuer) Common Stock, par value $0.001 per share (Title of Class of Securities) 57

July 8, 2024 8-K

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): July 8, 2024 (July 2, 2024) MASIM

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): July 8, 2024 (July 2, 2024) MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commissio

July 2, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

July 2, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

July 2, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

July 1, 2024 8-K

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): June 26, 2024 MASIMO CORPORATION

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): June 26, 2024 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Number)

July 1, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

July 1, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

July 1, 2024 EX-99.1

June 26, 2024

Exhibit 99.1 June 26, 2024 Dear Craig: I intend to resign my position as Masimo’s Chief Operating Officer in the event that Joe is removed as Chairman and CEO. I strongly disagree with the false accusations made by Politan in its recent fight letter and fight deck and have no intention of remaining with the company if Quentin Koffey and Politan take control of it. I strongly believe in Masimo’s cu

June 26, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

June 26, 2024 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One) ý ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-33642 A. Full t

June 26, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

June 26, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

June 26, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

June 26, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

June 21, 2024 DEFC14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☐ Filed by a Party other than the Registrant ☒ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of

June 20, 2024 EX-99.1

2 Safe Harbor Statement This presentation contains forward - looking statements within the meaning of federal securities laws, including, among others, st atements about our expectations, plans, strategies or prospects. We generally use the words “ma

Exhibit 99.1 Investor Presentation June 2024 Exhibit 99.1 2 Safe Harbor Statement This presentation contains forward - looking statements within the meaning of federal securities laws, including, among others, st atements about our expectations, plans, strategies or prospects. We generally use the words “may,” “will,” “expect,” “believe,” “anticipate,” “plan,” “estimate,” “project,” “assum e,” “gu

June 20, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

June 20, 2024 PRRN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 2) Filed by the Registrant ☐ Filed by a Party other than the Registrant x Check the appropriate box: x Preliminary Proxy Statement ☐ Confid

June 20, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

June 20, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

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): June 20, 2024 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Number)

June 17, 2024 DEFC14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive Proxy State

June 17, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

June 17, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

June 14, 2024 PRRN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1) Filed by the Registrant ¨ Filed by a Party other than the Registrant ☒ Check the appropriate box: x Preliminary Proxy Statement ¨ Confid

June 12, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

June 10, 2024 CORRESP

* * * *

June 10, 2024 Re: Masimo Corporation Preliminary Proxy Statement filed May 31, 2024 File No.

June 10, 2024 PRER14A

PRELIMINARY COPY DATED JUNE 10, 2024 – SUBJECT TO COMPLETION UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1)

PRELIMINARY COPY DATED JUNE 10, 2024 – SUBJECT TO COMPLETION UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.

June 7, 2024 8-K

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): June 7, 2024 (June 5, 2024) MASIM

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): June 7, 2024 (June 5, 2024) MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commissio

June 3, 2024 PREC14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: x Preliminary Proxy Statement ¨ Confidential, for Use of

June 3, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

May 31, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

May 31, 2024 PREC14A

PRELIMINARY COPY DATED MAY 31, 2024 – SUBJECT TO COMPLETION UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

PRELIMINARY COPY DATED MAY 31, 2024 – SUBJECT TO COMPLETION UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.

May 31, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

May 23, 2024 SD

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 Inco

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 principa

May 23, 2024 EX-1.01

Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form.

Exhibit 1.01 Masimo Corporation Conflict Minerals Report For the Calendar Year Ended December 31, 2023 Masimo Corporation (Masimo, we, us or our) is filing this Conflict Minerals Report (this Report) in compliance with Rule 13p-1 of the Securities Exchange Act of 1934, as amended (Rule 13p-1), for the calendar year ended December 31, 2023; and pursuant to Section 1502 of the Dodd-Frank Wall Street

May 20, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

May 16, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

May 13, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

May 13, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

May 10, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

May 9, 2024 EX-99.11

Politan Letter, dated May 9, 2024

EX-99.11 2 tm2414068d1ex99-11.htm EXHIBIT 99.11 Exhibit 99.11 May 9, 2024 Craig Reynolds Masimo Corporation 52 Discovery Irvine, CA 92618 Craig, I am writing to respond to your various communications proposing that Politan withdraw its nominations in return for Masimo seating one Politan nominee on the Masimo Board. I would like to make clear that Politan welcomes genuine efforts to avoid a proxy

May 9, 2024 SC 13D/A

MASI / Masimo Corporation / Politan Capital Management LP - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No. 9)* Masimo Corporation (Name of Issuer) Common Stock, par value $0.001 per share (Title of Class of Securities) 574

May 9, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

May 8, 2024 EX-99.10

Demand Letter, dated May 8, 2024

EX-99.10 2 tm2413948d1ex99-10.htm EXHIBIT 99.10 Exhibit 99.10 Quentin Koffey Director, Board of Directors of Masimo Corporation 106 West 52nd Street New York, New York 10019 May 8, 2024 Via Email Only Masimo Corporation Attn: Joe Kiani Chief Executive Officer 52 Discovery Irvine, California 92618 [email protected] Via Hand Delivery Masimo Corporation c/o Corporation Service Company 251 Little Fall

May 8, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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): May 8, 2024 (May 3, 2024) MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission

May 8, 2024 SC 13D/A

MASI / Masimo Corporation / Politan Capital Management LP - SC 13D/A Activist Investment

SC 13D/A 1 tm2413948d1sc13da.htm SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No. 8)* Masimo Corporation (Name of Issuer) Common Stock, par value $0.001 pe

May 7, 2024 EX-99.2

1 First Quarter 2024 Earnings May 7, 2024 2 Safe Harbor Statement This presentation contains forward-looking statements within the meaning of federal securities laws, including, among others, statements about our expectations, plans, strategies or pr

masi-q12024xearningspres 1 First Quarter 2024 Earnings May 7, 2024 2 Safe Harbor Statement This presentation contains forward-looking statements within the meaning of federal securities laws, including, among others, statements about our expectations, plans, strategies or prospects.

May 7, 2024 EX-99.1

Masimo Reports First Quarter 2024 Financial Results

Exhibit 99.1 Masimo Reports First Quarter 2024 Financial Results First Quarter 2024 Highlights: • Consolidated revenue was $492.8 million; • Healthcare revenue was $339.6 million; • Non-healthcare revenue was $153.2 million; • GAAP net income per diluted share was $0.35; and • Non-GAAP net income per diluted share was $0.77. Irvine, California, May 7, 2024 - Masimo Corporation (Nasdaq: MASI) today

May 7, 2024 8-K

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): May 7, 2024 MASIMO CORPORATION (E

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): May 7, 2024 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Number) (

May 7, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 30, 2024 ☐ TRANSITION REPORT P

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 00

April 29, 2024 10-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K/A (Amendment No. 1 )

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K/A (Amendment No. 1 ) (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commissio

April 2, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

April 1, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

March 27, 2024 EX-99.9

Form of Engagement and Indemnification Agreement entered into by and between Politan Capital Management LP and each of William Jellison and Darlene Solomon

Exhibit 99.9 ENGAGEMENT AND INDEMNIFICATION AGREEMENT, dated as of [n], 2024 (this “Agreement”), by and between Politan Capital Management LP (“Politan”) and [n] (“Nominee”). WHEREAS, Politan has asked Nominee, and Nominee has agreed, to be (i) a member of the slate of nominees (the “Slate”) of Politan or an affiliate of Politan for election to the Board of Directors (the “Board of Directors”) of

March 27, 2024 SC 13D/A

MASI / Masimo Corporation / Politan Capital Management LP - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No. 7)* Masimo Corporation (Name of Issuer) Common Stock, par value $0.001 per share (Title of Class of Securities) 574

March 25, 2024 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

March 22, 2024 8-K

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): March 22, 2024 MASIMO CORPORATION

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): March 22, 2024 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Number

March 22, 2024 EX-99.1

Masimo Corporation Board of Directors Authorizes Management to Evaluate the Separation of Consumer Business

Exhibit 99.1 Masimo Corporation Board of Directors Authorizes Management to Evaluate the Separation of Consumer Business IRVINE, Calif. – (BUSINESS WIRE) – Masimo (NASDAQ: MASI), a global leader in noninvasive monitoring technologies and audio products, today announced that its Board of Directors has authorized management to evaluate a proposed separation of its consumer business. The Board and ma

February 28, 2024 EX-97

asimo Corporation Claw

Exhibit 97 MASIMO CORPORATION CLAWBACK POLICY The Board of Directors (the “Board”) of Masimo Corporation (the “Company”) believes that it is in the best interests of the Company and its stockholders to adopt this Clawback Policy (this “Policy”), which provides for the recovery of certain incentive compensation in the event of an Accounting Restatement (as defined below).

February 28, 2024 EX-21.1

List of Registrant’s Subsidiaries

Exhibit 21.1 Subsidiaries of the Registrant - 2023 The following are wholly-owned subsidiaries of the registrant, Masimo Corporation, a Delaware corporation: Name of Subsidiary State or Jurisdiction of Incorporation or Organization Masimo Americas, Inc. Delaware Masimo de Mexico Holdings I LLC Delaware Masimo de Mexico Holdings II LLC Delaware Masimo Holdings LLC Delaware SpO2.com, Inc. Delaware S

February 28, 2024 EX-10.34

Amended and Restated 2007 Severance Protection Plan, Limited Participation Agreement, dated

MASIMO CORPORATION AMENDED AND RESTATED 2007 SEVERANCE PROTECTION PLAN Participation Agreement for Blair Tripodi Page 1 of 5 November , 2023 Personal & Confidential Blair Tripodi Chief Operating Officer, Consumer Masimo Corporation 52 Discovery Irvine, California 92618 Re: Masimo Corporation Amended and Restated 2007 Severance Protection Plan - Participation Agreement Dear Mr.

February 28, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-336

February 27, 2024 EX-99.1

Masimo Reports Fourth Quarter and Full-Year 2023 Financial Results

Exhibit 99.1 Masimo Reports Fourth Quarter and Full-Year 2023 Financial Results Fourth Quarter 2023 Highlights: ■ Consolidated revenue was $548.9 million; ■ Healthcare revenue was $339.9 million; ■ Non-healthcare revenue was $209.0 million; ■ GAAP net income per diluted share of $0.63; and ■ Non-GAAP net income per diluted share (updated definition) of $1.25. Full-Year 2023 Highlights: ■ Consolida

February 27, 2024 EX-99.2

1 Fourth Quarter 2023 Earnings February 27, 2024 2 Safe Harbor Statement This presentation contains forward-looking statements within the meaning of federal securities laws, including, among others, statements about our expectations, plans, strategie

1 Fourth Quarter 2023 Earnings February 27, 2024 2 Safe Harbor Statement This presentation contains forward-looking statements within the meaning of federal securities laws, including, among others, statements about our expectations, plans, strategies or prospects.

February 27, 2024 8-K

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): February 27, 2024 MASIMO CORPORAT

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): February 27, 2024 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Num

February 15, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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): February 13, 2024 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Num

February 14, 2024 SC 13G/A

MASI / Masimo Corporation / KIANI JOE E - SC 13G/A Passive Investment

SC 13G/A 1 schedule13ga-2023.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 16)* MASIMO CORPORATION (Name of Issuer) Common Stock, $0.001 par value (Title of Class of Securities) 574795100 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of this Statement) Check the ap

February 13, 2024 SC 13G/A

MASI / Masimo Corporation / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv01411-masimocorp.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 11)* Name of issuer: Masimo Corp Title of Class of Securities: Common Stock CUSIP Number: 574795100 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the rule p

January 16, 2024 EX-99.1

Masimo Announces New Member of the Board of Directors Bob Chapek Joins Masimo’s Board of Directors

Exhibit 99.1 Masimo Announces New Member of the Board of Directors Bob Chapek Joins Masimo’s Board of Directors IRVINE, Calif – January 16, 2024 – Masimo (NASDAQ: MASI) announced today that Bob Chapek has been appointed to Masimo’s Board of Directors. Mr. Chapek was Chief Executive Officer of The Walt Disney Company, one of the world’s largest media and entertainment companies, from February 2020

January 16, 2024 8-K

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): January 15, 2024 MASIMO CORPORATI

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): January 15, 2024 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Numb

January 10, 2024 EX-99.2

1 GAAP to Non-GAAP Reconciliations January 10, 2024 CONFIDENTIAL 2 Consolidated Income Statement (1) Totals may not foot due to rounding. Annual reported amounts may vary from amounts previously reported due to rounding conventions. (2) Guidance prov

masi-q42023preearningspr 1 GAAP to Non-GAAP Reconciliations January 10, 2024 CONFIDENTIAL 2 Consolidated Income Statement (1) Totals may not foot due to rounding.

January 10, 2024 EX-99.3

© 2019 Masimo Non-GAAP Measures, Adjustments and Definitions Updated January 10, 2024 © 2019 Masimo Forward-Looking Statements Masimo Corporation (“Masimo”, “MASI”, or the “Company”) cautions you that statements included in this presentation that are

© 2019 Masimo Non-GAAP Measures, Adjustments and Definitions Updated January 10, 2024 © 2019 Masimo Forward-Looking Statements Masimo Corporation (“Masimo”, “MASI”, or the “Company”) cautions you that statements included in this presentation that are not a description of historical facts are forward-looking statements that involve risks, uncertainties, assumptions and other factors which, if they do not materialize or prove correct, could cause the Company’s results to differ materially and adversely from historical results or those expressed or implied by such forward-looking statements.

January 10, 2024 8-K

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): January 10, 2024 MASIMO CORPORATI

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): January 10, 2024 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Numb

January 10, 2024 EX-99.1

Masimo Announces Select Preliminary 2023 Financial Results and 2024 Guidance Complete fourth quarter and full-year 2023 financial results will be announced on Tuesday, February 27, 2024

Exhibit 99.1 Masimo Announces Select Preliminary 2023 Financial Results and 2024 Guidance Complete fourth quarter and full-year 2023 financial results will be announced on Tuesday, February 27, 2024 Irvine, California, January 10, 2024 - Masimo Corporation (Nasdaq: MASI) today announced select preliminary financial results for the fourth quarter and full-year ended December 30, 2023 and provided e

November 22, 2023 8-K

Other Events

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 17, 2023 MASIMO CORPORATION (Exact name of registrant as specified in its charter) Delaware 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission Fi

November 8, 2023 EX-21.1

List of Registrant’s Subsidiaries

Exhibit 21.1 Subsidiaries of the Registrant - 2023 The following are wholly-owned subsidiaries of the registrant, Masimo Corporation, a Delaware corporation: Name of Subsidiary State or Jurisdiction of Incorporation or Organization Masimo Americas, Inc. Delaware Masimo de Mexico Holdings I LLC Delaware Masimo de Mexico Holdings II LLC Delaware Masimo Holdings LLC Delaware SpO2.com, Inc. Delaware S

November 8, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 ☐ TRANSITION REPO

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Numbe

November 7, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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 7, 2023 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Numb

November 7, 2023 EX-99.2

1 Third Quarter 2023 Earnings November 7, 2023 2 Safe Harbor Statement These presentations contain forward-looking statements within the meaning of federal securities laws, including, among others, statements about our expectations, plans, strategies

1 Third Quarter 2023 Earnings November 7, 2023 2 Safe Harbor Statement These presentations contain forward-looking statements within the meaning of federal securities laws, including, among others, statements about our expectations, plans, strategies or prospects.

November 7, 2023 EX-99.1

Masimo Announces New Member of the Board of Directors Rolf A. Classon Joins Masimo’s Board of Directors

Exhibit 99.1 Masimo Announces New Member of the Board of Directors Rolf A. Classon Joins Masimo’s Board of Directors IRVINE, Calif – November 7, 2023 – Masimo (NASDAQ: MASI) announced today that Rolf A. Classon has been appointed to Masimo’s Board of Directors. Mr. Classon is an experienced medical technology executive and board member. From October 2002 until his retirement in July 2004, he was C

November 7, 2023 EX-99.1

Masimo Reports Third Quarter 2023 Financial Results

Exhibit 99.1 Masimo Reports Third Quarter 2023 Financial Results Third Quarter 2023 Highlights • Consolidated revenue was $478.9 million; • Healthcare revenue was $307.8 million; • Non-healthcare revenue was $171.1 million; • GAAP net income per diluted share was $0.20; and • Non-GAAP net income per diluted share was $0.63. Irvine, California, November 7, 2023 - Masimo Corporation (Nasdaq: MASI) t

November 7, 2023 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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 3, 2023 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Numb

October 27, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

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): October 26, 2023 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Numb

October 27, 2023 EX-99.1

UNITED STATES INTERNATIONAL TRADE COMMISSION Washington, D.C.

Exhibit 99.1 UNITED STATES INTERNATIONAL TRADE COMMISSION Washington, D.C. In the Matter of CERTAIN LIGHT-BASED Investigation No. 337-TA-1276 PHYSIOLOGICAL MEASUREMENT DEVICES AND COMPONENTS THEREOF NOTICE OF THE COMMISSION’S FINAL DETERMINATION FINDING A VIOLATION OF SECTION 337; ISSUANCE OF A LIMITED EXCLUSION ORDER AND A CEASE AND DESIST ORDER; TERMINATION OF THE INVESTIGATION AGENCY: U.S. Inte

October 27, 2023 EX-99.2

United States International Trade Commission Issues Exclusion Order for Infringing Apple Watches, Finding that Apple Violated U.S. Trade Laws Decision Holds World’s Largest Company Accountable for Its Patent Infringement

Exhibit 99.2 United States International Trade Commission Issues Exclusion Order for Infringing Apple Watches, Finding that Apple Violated U.S. Trade Laws Decision Holds World’s Largest Company Accountable for Its Patent Infringement Washington, D.C. - October 26, 2023 - Masimo (NASDAQ: MASI) today announced that the United States International Trade Commission (USITC) has recommended a limited ex

August 8, 2023 EX-21.1

List of Registrant’s Subsidiaries

Exhibit 21.1 Subsidiaries of the Registrant - 2023 The following are wholly-owned subsidiaries of the registrant, Masimo Corporation, a Delaware corporation: Name of Subsidiary State or Jurisdiction of Incorporation or Organization Masimo Americas, Inc. Delaware Masimo de Mexico Holdings I LLC Delaware Masimo de Mexico Holdings II LLC Delaware Masimo Holdings LLC Delaware SpO2.com, Inc. Delaware S

August 8, 2023 EX-99.2

Second Quarter 2023 Earnings A u g u s t 8 , 2 0 2 3 These presentations contain forward-looking statements within the meaning of federal securities laws, including, among others, statements about our expectations, plans, strategies or prospects. We

masi-q22023earningspres Second Quarter 2023 Earnings A u g u s t 8 , 2 0 2 3 These presentations contain forward-looking statements within the meaning of federal securities laws, including, among others, statements about our expectations, plans, strategies or prospects.

August 8, 2023 EX-99.1

Masimo Reports Second Quarter 2023 Financial Results

Exhibit 99.1 Masimo Reports Second Quarter 2023 Financial Results Second Quarter 2023 Highlights • Consolidated revenue was $455.3 million; • Healthcare revenue was $281.1 million; • Non-healthcare revenue was $174.2 million; • GAAP net income per diluted share was $0.29; and • Non-GAAP net income per diluted share was $0.62. Irvine, California, August 8, 2023 - Masimo Corporation (Nasdaq: MASI) t

August 8, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended July 1, 2023 ☐ TRANSITION REPORT PUR

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended July 1, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-

August 8, 2023 8-K

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): August 8, 2023 MASIMO CORPORATION

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): August 8, 2023 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Number

July 17, 2023 EX-99.1

Masimo Announces Preliminary Second Quarter 2023 Revenue Results Management to announce and discuss complete second quarter 2023 financial results on Tuesday, August 8, 2023.

Exhibit 99.1 Masimo Announces Preliminary Second Quarter 2023 Revenue Results Management to announce and discuss complete second quarter 2023 financial results on Tuesday, August 8, 2023. Irvine, California, July 17, 2023 - Masimo Corporation (Nasdaq: MASI) today announced preliminary revenue results for the second quarter ended July 1, 2023. Preliminary Second Quarter 2023 Revenue Results Masimo

July 17, 2023 8-K

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): July 17, 2023 MASIMO CORPORATION

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): July 17, 2023 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Number)

June 30, 2023 SC 13D/A

MASI / Masimo Corp / Politan Capital Management LP - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No. 6)* Masimo Corporation (Name of Issuer) Common Stock, par value $0.001 per share (Title of Class of Securities) 574

June 30, 2023 EX-99.8

Press Release, dated June 26, 2023

Exhibit 99.8 Politan Announces Shareholders Have Overwhelmingly Elected Both Its Director Nominees to Masimo's Board Appreciates Support From Fellow Shareholders Demonstrating Clear Mandate For Change Nominees Michelle Brennan and Quentin Koffey Are Ready to Work Constructively in the Masimo Boardroom to Benefit All Stakeholders NEW YORK – June 26, 2023 – Politan Capital Management (together with

June 28, 2023 8-K

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): June 26, 2023 MASIMO CORPORATION

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): June 26, 2023 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Number)

June 28, 2023 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One) ý ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-33642 A. Full t

June 28, 2023 EX-3.1

Certificate of Amendment to Amended and Restated Certificate of Incorporation, dated June 28, 2023 (incorporated herein by reference Exhibit 3.1 to the Registrant’s Current Report on Form 8-K filed with the Securities and Exchange Commission on June 28, 2023)

Exhibit 3.1 CERTIFICATE OF AMENDMENT TO THE AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF MASIMO CORPORATION MASIMO CORPORATION, a corporation organized and existing under the General Corporation Law of the State of Delaware (the “Corporation”), does hereby certify as follows: A.The name of the Corporation is Masimo Corporation. B.The date of filing of the original Certificate of Incorporat

June 23, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

June 22, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

June 20, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

June 20, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

June 15, 2023 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

DFAN14A 1 tm2318840d1dfan14a.htm DFAN14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use o

June 13, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

DEFA14A 1 masi-20230613xdefa14a.htm DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Co

June 13, 2023 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

June 12, 2023 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

June 12, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

DEFA14A 1 masi-20230612xdefa14a.htm DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Co

June 9, 2023 CORRESP

* * * *

June 9, 2023 Re: Masimo Corporation DEFA14A Filed June 6, 2023 File No. 001-33642 Christina Chalk Blake Grady Division of Corporation Finance Office of Mergers & Acquisitions U.S. Securities and Exchange Commission 100 F Street, NE Washington, D.C. 20549 Dear Christina Chalk and Blake Grady: On behalf of Masimo Corporation (the “Company” or “Masimo”), a Delaware corporation, we submit to the staff

June 9, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

June 6, 2023 EX-99.1

Masimo Chairman and CEO Joe Kiani Waives Rights Under Director Change-in-Control Provision Mr. Kiani Previously Waived Other Rights in Connection with the 2023 Annual Meeting of Stockholders and the Appointment of a Lead Independent Director

Exhibit 99.1 Masimo Chairman and CEO Joe Kiani Waives Rights Under Director Change-in-Control Provision Mr. Kiani Previously Waived Other Rights in Connection with the 2023 Annual Meeting of Stockholders and the Appointment of a Lead Independent Director IRVINE, Calif. – (BUSINESS WIRE) – June 6, 2023 – Masimo Corporation (“Masimo” or the “Company”) (Nasdaq: MASI) today announced that Joe Kiani, f

June 6, 2023 EX-10.1

Limited Waiver, dated as of June 5, 2023, executed by Joe Kiani.

Exhibit 10.1 LIMITED WAIVER Reference is hereby made to that certain Amended and Restated Employment Agreement, dated as of November 4, 2015, as amended by the First Amendment thereto dated July 27, 2017 and the Second Amendment thereto dated January 14, 2022 (such agreement, as amended, the “Employment Agreement”), by and between Masimo Corporation, a Delaware corporation (the “Company”), and Joe

June 6, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

June 6, 2023 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Ru

June 6, 2023 8-K

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): June 5, 2023 MASIMO CORPORATION (

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): June 5, 2023 MASIMO CORPORATION (Exact name of registrant as specified in its charter) DE 001-33642 33-0368882 (State or other jurisdiction of incorporation) (Commission File Number)

June 2, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

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