# EDGAR Filing Document

**Accession Number:** 0000937556
**File Stem:** 0000937556-25-000093
**Filing Date:** 2025-6
**Character Count:** 37738
**Document Hash:** a7bb5c0b1a72f471e58655127c9240d7
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000937556-25-000093.hdr.sgml**: 20250626

**ACCESSION NUMBER**: 0000937556-25-000093

**CONFORMED SUBMISSION TYPE**: 11-K

**PUBLIC DOCUMENT COUNT**: 3

**CONFORMED PERIOD OF REPORT**: 20241231

**FILED AS OF DATE**: 20250626

**DATE AS OF CHANGE**: 20250625

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MASIMO CORP
- **CENTRAL INDEX KEY:** 0000937556
- **STANDARD INDUSTRIAL CLASSIFICATION:** ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS [3845]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 330368882
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0103

**FILING VALUES:**
- **FORM TYPE:** 11-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-33642
- **FILM NUMBER:** 251074724

**BUSINESS ADDRESS:**
- **STREET 1:** 52 DISCOVERY
- **CITY:** IRVINE
- **STATE:** CA
- **ZIP:** 92618
- **BUSINESS PHONE:** 949-297-7000

**MAIL ADDRESS:**
- **STREET 1:** 52 DISCOVERY
- **CITY:** IRVINE
- **STATE:** CA
- **ZIP:** 92618

<u>[**Table of Contents**](#i3707a2ab885a4df69a169c3da4fdb68f_4)</u>

    

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**WASHINGTON, D.C. 20549**

_____________________________

**FORM 11-K**

**_____________________________**

**(Mark One)**

---

| | |
|:---|:---|
| 🗷 | **ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934** |

---

**For the fiscal year ended December 31, 2024** 

**OR**

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| | |
|:---|:---|
| ◻ | **TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934** |

---

**For the transition period from&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; to&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;** 

**Commission File Number 001-33642**

**_____________________________**

**A.** **Full title of the plan and the address of the plan, if different from that of the issuer named below:**

![image1.jpg](image1.jpg)

**MASIMO**

**RETIREMENT SAVINGS PLAN**

**B.** **Name of issuer of the securities held pursuant to the plan and the address of its principal executive office:**

**MASIMO CORPORATION**

**52 Discovery**

**Irvine, California 92618**

    

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<u>[**Table of Contents**](#i3707a2ab885a4df69a169c3da4fdb68f_4)</u>

**MASIMO**

**RETIREMENT SAVINGS PLAN**

**FINANCIAL STATEMENTS AND SUPPLEMENTAL SCHEDULE**

**TABLE OF CONTENTS**

---

| | |
|:---|:---|
| <u>[Report of Independent Registered Public Accounting Firm – Grant Thornton LLP](#i3707a2ab885a4df69a169c3da4fdb68f_7)</u> | <u>[3](#i3707a2ab885a4df69a169c3da4fdb68f_7)</u> |
| Financial Statements: |  |
| <u>[Statements of Net Assets Available for Benefits as of](#i3707a2ab885a4df69a169c3da4fdb68f_10)December 31, 2024[and](#i3707a2ab885a4df69a169c3da4fdb68f_10)</u><u>December 31, 2023</u> | <u>[4](#i3707a2ab885a4df69a169c3da4fdb68f_10)</u> |
| <u>[Statement of Changes in Net Assets Available for Benefits for the Year Ended](#i3707a2ab885a4df69a169c3da4fdb68f_13)December 31, 2024</u> | <u>[5](#i3707a2ab885a4df69a169c3da4fdb68f_13)</u> |
| <u>[Notes to Financial Statements](#i3707a2ab885a4df69a169c3da4fdb68f_16)</u> | <u>[6](#i3707a2ab885a4df69a169c3da4fdb68f_16)</u> |
| Supplemental Schedules: |  |
| <u>[Schedule H, Line 4(a) – Schedule of Delinquent Participant Contributions](#i3707a2ab885a4df69a169c3da4fdb68f_46)</u> | <u>[12](#i3707a2ab885a4df69a169c3da4fdb68f_46)</u> |
| <u>[Schedule H, Line 4(i) – Schedule of Assets (Held](#i3707a2ab885a4df69a169c3da4fdb68f_49)a[t End of Year)](#i3707a2ab885a4df69a169c3da4fdb68f_49)</u> | <u>[13](#i3707a2ab885a4df69a169c3da4fdb68f_49)</u> |
| <u>[Signature](#i3707a2ab885a4df69a169c3da4fdb68f_55)</u> | <u>[15](#i3707a2ab885a4df69a169c3da4fdb68f_55)</u> |

---

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<u>[**Table of Contents**](#i3707a2ab885a4df69a169c3da4fdb68f_4)</u>

**REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM**

Plan Administrator and Plan Participants

Masimo Retirement Savings Plan

**Opinion on the financial statements** 

We have audited the accompanying statements of net assets available for benefits of Masimo Retirement Savings Plan (the "Plan") as of December 31, 2024 and 2023, the related statement of changes in net assets available for benefits for the year ended December 31, 2024, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the net assets available for benefits of the Plan as of December 31, 2024 and 2023, and the changes in net assets available for benefits for the year ended December 31, 2024 in conformity with accounting principles generally accepted in the United States of America.

**Basis for opinion** 

These financial statements are the responsibility of the Plan's management. Our responsibility is to express an opinion on the Plan's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) ("PCAOB") and are required to be independent with respect to the Plan in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Plan is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Plan's internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

**Supplemental information** 

The supplemental information in the accompanying schedules, Schedule H, Line 4(a) - Schedule of Delinquent Participant Contributions for the year ended December 31, 2024 and Schedule H, Line 4(i) - Schedule of Assets (Held at End of Year) as of December 31, 2024 ("supplemental information") has been subjected to audit procedures performed in conjunction with the audit of the Plan's financial statements. The supplemental information is the responsibility of the Plan's management. Our audit procedures included determining whether the supplemental information reconciles to the financial statements or the underlying accounting and other records, as applicable, and performing procedures to test the completeness and accuracy of the information presented in the supplemental information. In forming our opinion on the supplemental information, we evaluated whether the supplemental information, including its form and content, is presented in conformity with the Department of Labor's Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. In our opinion, the supplemental information is fairly stated, in all material respects, in relation to the financial statements as a whole.

/s/ GRANT THORNTON LLP

We have served as the Plan's auditor since 2010.

Boston, Massachusetts

June 25, 2025

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<u>[**Table of Contents**](#i3707a2ab885a4df69a169c3da4fdb68f_4)</u>

**MASIMO**

**RETIREMENT SAVINGS PLAN**

**STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS**

---

| | | |
|:---|:---|:---|
| | **As of December 31,** | **As of December 31,** |
| | **2024** | **2023** |
| **ASSETS** |  |  |
| Investments, at fair value | $241748178 | $204331975 |
| Receivables: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp; Notes receivable from participants | 2340752 | 1840805 |
| &nbsp;&nbsp;&nbsp;&nbsp; Due from broker for unsettled securities sold |  | 3877 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total receivables | 2340752 | 1844682 |
| Net assets available for benefits | $244088930 | $206176657 |

---

The accompanying notes are an integral part of these financial statements.

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<u>[**Table of Contents**](#i3707a2ab885a4df69a169c3da4fdb68f_4)</u>

**MASIMO**

**RETIREMENT SAVINGS PLAN**

**STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS**

---

| | |
|:---|:---|
| | **Year Ended<br> December 31, 2024** |
| **ADDITIONS TO NET ASSETS** | |
| Contributions: |  |
| &nbsp;&nbsp;&nbsp;&nbsp; Participant deferral contributions | $17004357 |
| &nbsp;&nbsp;&nbsp;&nbsp; Participant rollover contributions | 1321316 |
| &nbsp;&nbsp;&nbsp;&nbsp; Employer contributions | 4594160 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total contributions | 22919833 |
| Investment income: |  |
| &nbsp;&nbsp;&nbsp;&nbsp; Dividends | 7672673 |
| &nbsp;&nbsp;&nbsp;&nbsp; Net appreciation in fair value of investments | 26511536 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Net investment income | 34184209 |
| Interest income on notes receivable from participants | 163399 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total additions to net assets | 57267441 |
| **DEDUCTIONS FROM NET ASSETS** |  |
| Distributions to participants | 19182012 |
| Plan administrative expenses | 173156 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total deductions from net assets | 19355168 |
| Net increase in net assets available for benefits | 37912273 |
| Net assets available for benefits, at beginning of year | 206176657 |
| Net assets available for benefits, at end of year | $244088930 |

---

The accompanying notes are an integral part of these financial statements.

------

<u>[**Table of Contents**](#i3707a2ab885a4df69a169c3da4fdb68f_4)</u>

**MASIMO**

**RETIREMENT SAVINGS PLAN**

**NOTES TO FINANCIAL STATEMENTS**

**AS OF DECEMBER 31, 2024 AND 2023**

**1. Description of the Plan**

The following description of the Masimo Retirement Savings Plan (the Plan) is provided for general information purposes only. Plan participants should refer to the Plan document for more complete information.

***General***

The Plan is a cash deferred arrangement under Section 401(k) of the Internal Revenue Code of 1986, as amended (the Code), covering U.S. employees of Masimo Corporation (the Company, Employer or Masimo) or one of its U.S. subsidiaries. The Plan was established for the purpose of providing retirement benefits for U.S. employees of the Company. The Plan is intended to qualify as a profit sharing plan under Section 401(a) of the Code with a salary reduction feature qualified under Section 401(k) of the Code. The Plan is subject to the provisions of the Employee Retirement Income Security Act of 1974, as amended (ERISA). The Plan is administered by the 401(k) Committee (Plan Management), members of which are appointed by the Company's Board of Directors. Fidelity Management Trust Company (Fidelity) is a fiduciary of the Plan and also serves as the record keeper to maintain the individual accounts of each Plan participant. The Plan was originally adopted in April 1995, and has been amended at various times through December 31, 2024.

***Eligibility***

Employees who are at least 18 years of age and on the U.S. payroll of the Company or its U.S. subsidiaries are eligible to participate in the Plan as of the first date of employment with the Company or one of its U.S. subsidiaries, and are eligible to contribute to the Plan on the first day of the month concurrent with or following the first date of employment.

***Contributions***

Employees may elect to defer a percentage of their eligible compensation into the Plan. Compensation deferrals cannot exceed the maximum deferral, as determined by the Internal Revenue Service (IRS) each year. Such deferral limitation was 80% of compensation up to a maximum deferral of $23,000 in 2024. Employees who attained the age of 50 on or before December 31, 2024 were eligible to make additional catch-up contributions of up to $7,500 during 2024.

During the year ended December 31, 2024, the Company matched 100% of a participant's salary deferral, up to a maximum deferral of 3% of each participant's eligible compensation for the pay period, subject to the annual compensation limit of $345,000 as determined by the IRS each year. The Company's maximum aggregate matching contribution per participant was $10,350 in 2024. The Company has the right under the Plan to discontinue or modify its matching contributions at any time. In order to be eligible for matching contributions, a participant need not complete any service requirement. As of the year ended December 31, 2024, the Plan includes an employer match on catch-up contributions. In addition, the Plan includes an after-tax contribution provision, which allows participants to make annual after-tax contributions of up to 10% of their salary and is limited to 80% of compensation.

Pursuant to the Plan Adoption Agreement, Matching Employer Contributions are made with each eligible participant's contribution up to the match limits. At the end of each plan year, a true up calculation is performed and an additional Employer Contribution is made, as necessary, to ensure all eligible participant contributions are fully matched up to the full annual match limit for the full plan year.

For the 2024 plan year, the additional true up employer match totaled $43,774, which was funded by forfeitures.

The Company may also make discretionary contributions to the Plan in such amounts as determined by resolution of the Board of Directors. There were no discretionary contributions for the year ended December 31, 2024.

Each eligible participant's account is credited with (a) the participant's contributions, (b) the Company's matching contributions, and (c) an allocation of interest, dividends and any change in the market value of the various investment funds. Plan earnings, by investment fund, are allocated daily by the asset custodian on the basis of the ratio that each eligible participant's account balance in the fund bears to the total account balances of all participants in the respective fund.

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<u>[**Table of Contents**](#i3707a2ab885a4df69a169c3da4fdb68f_4)</u>

**MASIMO CORPORATION**

**RETIREMENT SAVINGS PLAN**

**NOTES TO FINANCIAL STATEMENTS**

**AS OF DECEMBER 31, 2024 AND 2023 - (Continued)** 

***Investment Options***

Participants direct the investment of their contributions and the Company's matching contributions into various investment options offered by the Plan. The Plan currently offers investments in selected mutual funds, a Collective Investment Trust (CIT), and Masimo Corporation common stock.

***Vesting***

Participant contributions are fully vested when made. Participants in the Plan receive vesting credit for the Company's matching contributions based upon years of service, beginning with the date of employment with the Company or one of its subsidiaries, as follows:

---

| | |
|:---|:---|
| **<u>Years of Service (Whole Years)</u>** | **<u>Vesting</u>** |
| Less than 2 | 0% |
| &nbsp;&nbsp;&nbsp;&nbsp; 2 | 50% |
| &nbsp;&nbsp;&nbsp;&nbsp; 3 | 75% |
| 4 or more | 100% |

---

On June 6, 2022, the Plan was amended to reflect a change in the vesting schedule to 25% annual vesting beginning after one year of service, and then an additional 25% for each additional year of service thereafter. This change only applies to active Plan participants with any amount of service time on or after June 1, 2022.

---

| | |
|:---|:---|
| **<u>Years of Service (Whole Years)</u>** | **<u>Vesting</u>** |
| Less than 1 | 0% |
| &nbsp;&nbsp;&nbsp;&nbsp; 1 | 25% |
| &nbsp;&nbsp;&nbsp;&nbsp; 2 | 50% |
| &nbsp;&nbsp;&nbsp;&nbsp; 3 | 75% |
| 4 or more | 100% |

---

***Distributions and Payments of Benefits***

The normal retirement age is 65. Participants who incur a termination of employment prior to their normal retirement age are entitled to that portion of their Plan benefits earned to date, with vesting based upon the whole years of service credited as of the date of termination. In addition, "in-service" distributions may be requested by active employees that have reached age 59½, that have made rollover contributions into the Plan or that qualify for a financial hardship distribution in accordance with the Code.

On December 29, 2022, the Securing a Strong Retirement Act of 2022 (the SECURE Act 2.0) was signed into law. The SECURE Act 2.0 contains over 90 new retirement provisions, with varying effective dates primarily beginning in 2023 and spanning through 2027. Included in the SECURE Act 2.0 provisions was a change to the age at which required minimum distributions must commence from 72 to 73 for individuals who attain age 72 on or after January 1, 2023, and from age 73 to 75 for individuals who attain age 73 on or after January 1, 2033. The SECURE Act 2.0 includes both required and optional elements, which the Plan administrator is currently evaluating and incorporating into the Plan's policies.

***Plan Termination***

Although it has not expressed any intent to do so, the Company has the right under the Plan to discontinue its contributions at any time and/or to terminate the Plan, subject to the provisions of ERISA. In the event of termination of the Plan, participants will become fully vested in their accounts.

***Forfeitures***

Forfeitures of terminated participants' non-vested account balances may be used to pay administrative expenses or to reduce employer matching contributions. During the year ended December 31, 2024, no forfeitures were used to pay administrative expenses and $515,300 of forfeitures were used to reduce employer matching contributions. As of December 31, 2024 and December 31, 2023, the unallocated forfeiture balance was $221,774 and $251,752, respectively.

------

<u>[**Table of Contents**](#i3707a2ab885a4df69a169c3da4fdb68f_4)</u>

**MASIMO**

**RETIREMENT SAVINGS PLAN**

**NOTES TO FINANCIAL STATEMENTS**

**AS OF DECEMBER 31, 2024 AND 2023 - (Continued)**

***Administrative Expenses***

Administrative expenses, which consist primarily of participant and recordkeeping fees, were paid directly from participants' accounts. Certain administrative costs of the Plan were paid by the Company and not paid out of the Plan's assets.

***Notes Receivable from Participants***

Notes receivable from participants are secured by the participant's account balance and may not exceed the lesser of 50% of the participant's account balance or $50,000 in the aggregate for any individual participant. The number of outstanding notes per participant is limited to one. Notes related to the purchase of a participant's primary residence may not exceed a term of ten years. The term of all other notes may not exceed five years. For the year ended December 31, 2024, the annual interest rates of all notes outstanding ranged from 4.25% to 9.50%. For the year ended December 31, 2023, the annual interest rate of all notes outstanding ranged from 4.25% to 8.00%. Principal and interest are paid ratably through payroll deductions.

**2. Summary of Significant Accounting Policies**

***Basis of Accounting***

The Plan's financial statements are prepared on the accrual basis, in conformity with accounting principles generally accepted in the United States of America (GAAP).

***Use of Estimates***

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and changes therein, and disclosure of contingent assets and liabilities at the date of the financial statements.

***Risks and Uncertainties***

The Plan assets consist of various investments which are exposed to a number of risks, including interest rate, market and credit risks and Masimo Corporation common stock risks. Due to the level of risk associated with certain investment securities and the level of uncertainty related to changes in the value of investment securities, it is at least reasonably possible that changes in risks in the near term could materially affect participants' account balances and the amounts reported in the Statements of Net Assets Available for Benefits and the Statement of Changes in Net Assets Available for Benefits.

***Investment Valuation and Income Recognition***

The Plan's investments are stated at fair value. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The Plan administrator determines the Plan's valuation policies utilizing information provided by the investment advisers and custodians. See Note 3 for discussion of fair value measurements.

Purchases and sales of investments are recorded on a trade-date basis. Interest income is recorded on the accrual basis. Dividends are accrued on the ex-dividend date. Net appreciation in the fair value of investments includes the Plan's net gains and losses on investments bought and sold, as well as held, during the year.

Mutual funds and Masimo Corporation common stock are valued at the quoted market prices. Units of the CIT are valued at net asset value (NAV) as a practical expedient to fair value.

***Payment of Benefits***

Benefit payments to participants are recorded when paid.

***Contributions***

Contributions made by participants and the employer are recorded on an accrual basis. Contributions are recognized during the period in which the related compensation was earned by a participant.

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<u>[**Table of Contents**](#i3707a2ab885a4df69a169c3da4fdb68f_4)</u>

**MASIMO**

**RETIREMENT SAVINGS PLAN**

**NOTES TO FINANCIAL STATEMENTS**

**AS OF DECEMBER 31, 2024 AND 2023 - (Continued)** 

***Notes Receivable from Participants***

Notes receivable from participants are measured at their unpaid principal balance plus any accrued but unpaid interest. Interest income is recorded on the accrual basis. Related fees are recorded as administrative expenses and are expensed when they are incurred. Delinquent loans are reclassified as distributions based upon the terms of the Plan document.

**3. Fair Value Measurements**

The authoritative guidance describes a fair value hierarchy based on three levels of inputs, of which the first two are considered observable and the last unobservable, that may be used to measure fair value:

• Level 1—Quoted prices in active markets for *identical* assets or liabilities.

• Level 2—Inputs other than Level 1 that are observable, either directly or indirectly; such as quoted prices for *similar* assets or liabilities, quoted prices in markets that are not active; or other inputs that can be corroborated by observable market data for substantially the full term of the assets or liabilities.

• Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

The following is a description of the valuation methodologies used by the Plan for assets measured at fair value. There have been no changes to the methodologies used at December 31, 2024 and December 31, 2023.

***Mutual Funds***

Mutual funds are valued at the daily closing price as reported by the fund. Mutual funds held by the Plan are open-end mutual funds that are registered with the Securities and Exchange Commission. These funds are required to publish their daily NAV and to transact at that price. The mutual funds held by the Plan are actively traded.

***Collective Investment Trust (CIT)***

The CIT invests in stable value investment contracts (Stable Value Contracts) issued by life insurance companies, banks and other financial institutions, fixed income instruments that underlie Stable Value Contracts and other money market instruments. Under a Stable Value Contract, the issuer of the contract agrees, subject to contract conditions, to make payments representing redemptions from the Fund for participant-initiated benefit payments at "contract value" which is generally equal to the principal plus accrued interest of the underlying investments. This "benefit responsiveness" is designed to allow the CIT to maintain participant balances at book value (except under certain circumstances set forth within the Stable Value Contracts) while the impact of market fluctuations on investor account balances is potentially smoothed via periodic adjustments to the daily rate of return credited to investors. The Plan has only one CIT, which is the Goldman Sachs Stable Value Collective Investment Trust Class IV. As a practical expedient, the fair value of the CIT is reported based on the NAV of the CIT units since such units are not actively traded on a public market. There is a twelve month notice period for the CIT that can be enforced by Goldman Sachs before allowing a complete redemption by the Plan and there were no unfunded commitments.

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<u>[**Table of Contents**](#i3707a2ab885a4df69a169c3da4fdb68f_4)</u>

**MASIMO**

**RETIREMENT SAVINGS PLAN** 

**NOTES TO FINANCIAL STATEMENTS** 

**AS OF DECEMBER 31, 2024 AND 2023 - (Continued)**

***Masimo Corporation Common Stock***

Masimo Corporation common stock is valued at the quoted closing market price from The Nasdaq Stock Market LLC.

The following tables represent the Plan's fair value hierarchy for its investments:

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| | | | | |
|:---|:---|:---|:---|:---|
| | **Fair Value Measurements as of December 31, 2024** | **Fair Value Measurements as of December 31, 2024** | **Fair Value Measurements as of December 31, 2024** | **Fair Value Measurements as of December 31, 2024** |
| **<u>Investment Class</u>** | **Level 1** | **Level 2** | **Level 3** | **Total** |
| Mutual funds | $215511841 | $— | $— | $215511841 |
| Masimo Corporation common stock | 22596425 |  |  | 22596425 |
| &nbsp;&nbsp;&nbsp;&nbsp;Total assets in fair value hierarchy | $238108266 | $— | $— | $238108266 |
| Collective investment trust |  |  |  | 3639912 |
| &nbsp;&nbsp;&nbsp;&nbsp;Total investments at fair value |  |  |  | $241748178 |

---

---

| | | | | |
|:---|:---|:---|:---|:---|
| | **Fair Value Measurements as of December 31, 2023** | **Fair Value Measurements as of December 31, 2023** | **Fair Value Measurements as of December 31, 2023** | **Fair Value Measurements as of December 31, 2023** |
| **<u>Investment Class</u>** | **Level 1** | **Level 2** | **Level 3** | **Total** |
| Mutual funds | $184700029 | $— | $— | $184700029 |
| Masimo Corporation common stock | 16069417 |  |  | 16069417 |
| &nbsp;&nbsp;&nbsp;&nbsp;Total assets in fair value hierarchy | $200769446 | $— | $— | $200769446 |
| Collective investment trust |  |  |  | 3562529 |
| &nbsp;&nbsp;&nbsp;&nbsp;Total investments at fair value |  |  |  | $204331975 |

---

**4. Party-in-Interest Transactions**

Transactions in shares of Masimo's common stock qualify as exempt party-in-interest transactions under the provisions of ERISA, since Masimo is the Plan administrator. During the year ended December 31, 2024, the Plan made purchases of $3,734,761 and sales of $3,668,358 of Masimo's common stock on behalf of Plan participants.

Fidelity is the trustee, custodian and record keeper as defined by the Plan, and therefore, the transactions with Fidelity investments qualify as party-in-interest transactions. Purchases and sales of these accounts and the underlying investments comprising these accounts are open market transactions at fair market value. Such transactions are permitted under the provisions of the Plan and are exempt from the prohibition of party-in-interest transactions under ERISA and applicable exemptions promulgated thereunder. Consequently, management fees and operating expenses are reflected as a reduction of investment return for such investments.

In addition, notes receivable from participants are also considered to be party-in-interest transactions, which are exempt from the prohibited transaction rules under ERISA.

**5. Tax Status of the Plan**

The Plan is required to operate in conformity with the Code to maintain its qualification. The Plan is a Fidelity Volume Submitter Plan, which received a favorable advisory letter from the IRS in June 2020. The Plan administrator believes that the Plan is qualified under Section 401(a) of the Code and the related trust is tax-exempt as of December 31, 2024 and December 31, 2023. In accordance with GAAP, Plan Management is required to evaluate tax positions taken by the Plan and recognize a tax liability if the organization has taken an uncertain position that more likely than not would not be sustained upon examination by the IRS. The Plan administrator has analyzed the tax positions taken by the Plan and has concluded that as of December 31, 2024 and December 31, 2023, there are no uncertain tax positions taken that would require recognition of a liability or disclosure in the financial statements. The Plan is subject to routine audits by taxing jurisdictions; however, there are currently no audits for any tax periods in progress. The Plan's tax returns generally remain open for IRS audit for three years from the filing date.

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<u>[**Table of Contents**](#i3707a2ab885a4df69a169c3da4fdb68f_4)</u>

**MASIMO**

**RETIREMENT SAVINGS PLAN** 

**NOTES TO FINANCIAL STATEMENTS** 

**AS OF DECEMBER 31, 2024 AND 2023 - (Continued)**

**6. Delinquent Participant Contributions**

For the years ended December 31, 2024 and December 31, 2023, the Company did not remit certain participant contributions to the Plan on a timely basis as defined by the Department of Labor's Rules and Regulations for Reporting and Delinquent Participant Contributions Disclosure under ERISA. Untimely remittances identified on the Schedule of Delinquent Participant Contributions totaled $8,344 and $1,796 in 2024 and 2023, respectively. See accompanying supplemental Schedule H, Line 4(a) - Schedule of Delinquent Participant Contributions for further information.

**7. Subsequent Events**

Effective April 1, 2025, the Plan was amended to allow in-plan Roth conversions and in-plan Roth rollover contributions.

Plan Management has evaluated all events or transactions that occurred through June 25, 2025, the date the financial statements were issued and determined that there are no additional matters requiring adjustment to or disclosure in the accompanying financial statements and related notes.

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**MASIMO CORPORATION**

**RETIREMENT SAVINGS PLAN**

Supplementary Information

Schedule H, Line 4(a) – Schedule of Delinquent Participant Contributions

For the year ended December 31, 2024

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| | | | | |
|:---|:---|:---|:---|:---|
| **Participant Contributions Transferred Late to Plan** | **Total that Constitute Nonexempt Prohibited Transactions** | **Total that Constitute Nonexempt Prohibited Transactions** | **Total that Constitute Nonexempt Prohibited Transactions** | **Total Fully Corrected Under VFCP and<br> Prohibited Transaction Exemption 2002-51** |
| **Check here if Late Participant Loan** <br>**Repayments are Included ☐** | **Contributions Not Corrected**<sup>(1)</sup> | **Contributions Corrected Outside Voluntary Fiduciary Correction Program (VFCP)** | **Contributions Pending Correction in VFCP** | **Total Fully Corrected Under VFCP and<br> Prohibited Transaction Exemption 2002-51** |
| $8344 | $1334 | $— | $— | $7010 |

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_______________

<sup>(1)&nbsp;&nbsp;&nbsp;&nbsp;</sup>These delinquent contributions were fully corrected in February 2025.

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**MASIMO**

**RETIREMENT SAVINGS PLAN**

**EIN#: 33-0368882 PLAN#: 001**

Supplementary Information

Schedule H, Line 4(i) – Schedule of Assets (Held at End of Year)

As of December 31, 2024

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| | | | |
|:---|:---|:---|:---|
| **(a)** | **(b)**<br>**Identity of Issue, Borrower, Lessor or Similar Party** | **(c)**<br>**Number of shares** | **(e)**<br>**Value** |
| | **Mutual Funds:** | | |
| \* | Fidelity<sup>®</sup> 500 Index Fund | 156621 | $31980425 |
|  | American Funds 2035 Target Date Retirement Fund<sup>®</sup> Class R-6 | 1455788 | 27718208 |
|  | American Funds 2040 Target Date Retirement Fund<sup>®</sup> Class R-6 | 1107566 | 22771560 |
|  | American Funds 2030 Target Date Retirement Fund<sup>®</sup> Class R-6 | 1238543 | 21414407 |
|  | American Funds 2045 Target Date Retirement Fund<sup>®</sup> Class R-6 | 897471 | 19026382 |
|  | American Funds 2055 Target Date Retirement Fund<sup>®</sup> Class R-6 | 656609 | 17354174 |
|  | American Funds 2025 Target Date Retirement Fund<sup>®</sup> Class R-6 | 1139217 | 17304700 |
|  | American Funds 2050 Target Date Retirement Fund<sup>®</sup> Class R-6 | 744435 | 15558690 |
|  | Vanguard Information Technology Index Fund Admiral Shares | 21758 | 6925029 |
|  | American Funds 2020 Target Date Retirement Fund<sup>®</sup> Class R-6 | 408317 | 5495946 |
| \* | Fidelity<sup>®</sup> Mid Cap Index Fund | 138770 | 4686257 |
|  | PGIM Jennison Growth Fund Class R6 | 48003 | 3365998 |
| \* | Fidelity<sup>®</sup> Small Cap Index Fund | 110781 | 3066428 |
| \* | Fidelity<sup>®</sup> International Index Fund | 51246 | 2436231 |
|  | Victory Sycamore Established Value Fund Class I | 43088 | 1980325 |
|  | Columbia Select Large Cap Value Instl 3 | 49458 | 1754765 |
| \* | Fidelity<sup>®</sup> U.S. Bond Index Fund | 168725 | 1724366 |
| \* | Fidelity<sup>®</sup> Select Health Care Portfolio | 60925 | 1660206 |
|  | PIMCO Income Fund Institutional Class | 154620 | 1626598 |
|  | Victory Sycamore Small Company Opportunity Fund Class I | 19375 | 913906 |
|  | American Funds 2015 Target Date Retirement Fund<sup>®</sup> Class R-6 | 64658 | 792061 |
|  | Putnam Small Cap Growth Fund Class R6 | 9704 | 769644 |
| \* | Fidelity<sup>®</sup> Real Estate Investment Portfolio | 19326 | 745778 |
|  | Invesco Global Opportunities Fund Class R6 | 14762 | 727039 |
|  | BlackRock Mid-Cap Growth Equity Portfolio K | 16473 | 717876 |
|  | American Funds New World Fund<sup>®</sup> Class R6 | 8666 | 667016 |
| \* | Fidelity<sup>®</sup> Emerging Markets Index Fund | 60475 | 632573 |
|  | MFS International Diversification R6 Fund | 27411 | 626351 |
|  | First Eagle Global Fund Class I | 6231 | 420038 |
|  | Prudential Total Return Bond Fund Class Z | 31158 | 368285 |
|  | PIMCO International Bond Fund (U.S. Dollar Hedged) | 23571 | 234059 |
|  | American Funds 2010 Target Date Retirement Fund<sup>®</sup> Class R-6 | 3764 | 43741 |
| \* | Fidelity<sup>®</sup> Government Money Market Fund | 2779 | 2779 |
|  | **&nbsp;&nbsp;&nbsp;&nbsp;Total Mutual Funds** |  | $215511841 |
|  | **Collective Investment Trust:** |  |  |
|  | Goldman Sachs Stable Value Institutional Series Class I | 3639912 | 3639912 |
|  | **Common Stock:** |  |  |
| \* | Masimo Corporation | 136666 | 22596425 |
|  | **Other:** |  |  |
| \* | Notes receivable from participants | At interest rates between 4.25% and 9.50%, with scheduled maturity dates through December 2034 | 2340752 |
|  | **&nbsp;&nbsp;&nbsp;&nbsp;Total** |  | $**244088930** |

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\* Indicates a party-in-interest to the Plan.

Column (d), historical cost, has been omitted as all investments are participant directed.

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**EXHIBIT INDEX**

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| | |
|:---|:---|
| **Exhibit**<br>**<u>Number</u>** | **<u>Description of Document</u>** |
| 23.1 | <u>[Consent of Independent Registered Public Accounting Firm – Grant Thornton LLP](masi-20250625xexx231.htm)</u> |

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**SIGNATURE**

Pursuant to the requirements of the Securities Exchange Act of 1934, the Plan administrator of the Masimo Retirement Savings Plan has duly caused this annual report to be signed on its behalf by the undersigned hereunto duly authorized.

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| | | |
|:---|:---|:---|
| | **MASIMO RETIREMENT SAVINGS PLAN** | **MASIMO RETIREMENT SAVINGS PLAN** |
| June 25, 2025 | By: | /s/ MICAH YOUNG |
|  |  | Micah Young |
|  |  | *Executive Vice President, Chief Financial Officer of Masimo Corporation* |

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## Exhibit 23.1

**Exhibit 23.1** 

**CONSENT OF INDEPENDENT REGISTERED PUBLIC** 

**ACCOUNTING FIRM** 

We have issued our report dated June 25, 2025, with respect to the financial statements and supplemental information included in the Annual Report of Masimo Corporation Retirement Savings Plan on Form 11-K for the year ended December 31, 2024. We consent to the incorporation by reference of said report in the Registration Statement of Masimo Corporation on Forms S-8 (File No. 333-149138 and File No. 333-234386).

/s/ GRANT THORNTON LLP

Boston, Massachusetts

June 25, 2025

<br>