UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

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FORM 8-K

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CURRENT REPORT

Pursuant to Section 13 or 15(d) of theSecurities Exchange Act of 1934

Date of Report (Date of earliest event reported): March 30, 2022

MASIMO CORPORATION

(Exact name of registrant as specified in its charter)

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On March 30, 2022, Masimo Corporation (the “Company”) issued a press release announcing certain preliminary financial results for the first quarter ending April 2, 2022. A copy of the press release is furnished as Exhibit 99.1 to this Current Report (the “Press Release”). The preliminary financial information presented in this press release is based on the Company’s current expectations and may be adjusted as a result of, among other things, completion of customary quarter-end close review procedures and financial review. The Company’s management plans to discuss the Company’s complete first quarter 2022 financial results after the market closes on Tuesday, May 3, 2022.

In accordance with General Instructions B.2 of Form 8-K, the information in Item 2.02 and Exhibit 99.1 of this Current Report on Form 8-K shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liability of that section, and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

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

SIGNATURES

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

Document

Exhibit 99.1

Masimo Announces Certain Preliminary First Quarter 2022 Financial Results and Reaffirms Full-Year 2022 Revenue Guidance

Complete first quarter 2022 financial results will be announced on Tuesday, May 3, 2022.

Irvine, California, March 30, 2022 - Masimo Corporation (Nasdaq: MASI) today announced certain preliminary financial results for the first quarter ending April 2, 2022 and reaffirmed its full-year 2022 revenue guidance.

Preliminary First Quarter 2022 Results:

Masimo expects its product revenue for the first quarter of 2022 will range from $285 million to $315 million. Shortages of critical components in combination with other supply chain issues, including freight carrier delays, have led to lower than expected sales in the first quarter.

Joe Kiani, Chairman and CEO of Masimo, said “In prior quarters, we were able to weather the storm of COVID-related supply chain issues. However, these issues impacted us in the first quarter. We have strong customer demand, and had we been able to ship what was ordered in the first quarter, our revenues would have exceeded expectations. We are reiterating our full-year 2022 revenue guidance of $1,350 million based on our belief that we will fulfill our elevated level of open orders through the remainder of the year.”

The preliminary financial information presented in this press release is based on Masimo’s current expectations and may be adjusted as a result of, among other things, completion of customary quarter-end close review procedures and financial review. Management plans to discuss Masimo’s complete first quarter 2022 financial results after the market closes on Tuesday, May 3, 2022.

Conference Call:

The conference call to review Masimo’s complete first quarter 2022 results will begin at 1:30 p.m. PT (4:30 p.m. ET) on Tuesday, May 3, 2022, and will be hosted by Joe Kiani, Chairman and Chief Executive Officer, and Micah Young, Executive Vice President and Chief Financial Officer.

To register for the conference call and receive the dial-in number, please use the link below. Upon registering, each participant will be provided with call details and a registrant ID number.

Conference Call Registration Link:

https://conferencingportals.com/event/nUSpRIEm

A replay of the webcast and conference call will be available shortly after the conclusion of the call and will be archived on the Company’s website.

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About Masimo

Masimo (Nasdaq: MASI) is a global medical technology company that develops and produces a wide array of industry-leading monitoring technologies, including innovative measurements, sensors, patient monitors, and automation and connectivity solutions. Our mission is to improve patient outcomes, reduce the cost of care and take noninvasive monitoring to new sites and applications. Masimo SET® Measure-through Motion and Low Perfusion™ pulse oximetry, introduced in 1995, has been shown in over 100 independent and objective studies to outperform other pulse oximetry technologies. Masimo SET® has also been shown to help clinicians reduce severe retinopathy of prematurity in neonates, improve CCHD screening in newborns, and, when used for continuous monitoring with Masimo Patient SafetyNet™ in post-surgical wards, reduce rapid response team activations, ICU transfers, and costs. Masimo SET® is estimated to be used on more than 200 million patients in leading hospitals and other healthcare settings around the world, and is the primary pulse oximetry at 9 of the top 10 hospitals as ranked in the 2021-22 U.S. News and World Report Best Hospitals Honor Roll. Masimo continues to refine SET® and in 2018, announced that SpO2 accuracy on RD SET® sensors during conditions of motion has been significantly improved, providing clinicians with even greater confidence that the SpO2 values they rely on accurately reflect a patient’s physiological status. In 2005, Masimo introduced rainbow® Pulse CO-Oximetry technology, allowing noninvasive and continuous monitoring of blood constituents that previously could only be measured invasively, including total hemoglobin (SpHb®), oxygen content (SpOC™), carboxyhemoglobin (SpCO®), methemoglobin (SpMet®), Pleth Variability Index (PVi®), RPVi™ (rainbow® PVi), and Oxygen Reserve Index (ORi™). In 2013, Masimo introduced the Root® Patient Monitoring and Connectivity Platform, built from the ground up to be as flexible and expandable as possible to facilitate the addition of other Masimo and third-party monitoring technologies; key Masimo additions include Next Generation SedLine® Brain Function Monitoring, O3® Regional Oximetry, and ISA™ Capnography with NomoLine® sampling lines. Masimo’s family of continuous and spot-check monitoring Pulse CO-Oximeters® includes devices designed for use in a variety of clinical and non-clinical scenarios, including tetherless, wearable technology, such as Radius-7® and Radius PPG™, portable devices like Rad-67®, fingertip pulse oximeters like MightySat® Rx, and devices available for use both in the hospital and at home, such as Rad-97®. Masimo hospital automation and connectivity solutions are centered around the Masimo Hospital Automation™ platform, and include Iris® Gateway, iSirona™, Patient SafetyNet, Replica™, Halo ION™, UniView®, UniView :60™, and Masimo SafetyNet™. Additional information about Masimo and its products may be found at www.masimo.com. Published clinical studies on Masimo products can be found at www.masimo.com/evidence/featured-studies/feature/.

ORi and RPVi have not received FDA 510(k) clearance and are not available for sale in the United States. The use of the trademark Patient SafetyNet is under license from University HealthSystem Consortium.

Forward-Looking Statements

All statements other than statements of historical facts included in this press release that address activities, events or developments that we expect, believe or anticipate will or may occur in the future are forward-looking statements including, in particular, the statements about our expectations for first quarter 2022 product revenue and full year 2022 revenue guidance and the expectation that measures taken to resolve production issues will be effective; our long-term outlook; demand for our products; anticipated revenue and earnings growth; our financial condition, results of operations and business generally; expectations regarding our ability to design and deliver innovative new noninvasive technologies and reduce the cost of care; and demand for our technologies. These forward-looking statements are based on management’s current expectations and beliefs and are subject to uncertainties and factors, all of which are difficult to predict and many of which are beyond our control and could cause actual results to differ materially and adversely from those described in the forward-looking statements. These risks include, but are not limited to, those related to: the completion of customary quarterly financial statement review procedures; our dependence on Masimo SET® and Masimo rainbow SET™ products and technologies for substantially all of our revenue; any failure in protecting our intellectual property exposure to competitors’ assertions of intellectual property claims; the highly competitive nature of the markets in which we sell our products and technologies; any failure to continue developing innovative products and technologies; the lack of acceptance of any of our current or future products and technologies; obtaining regulatory approval of our current and future products and technologies; the risk that the implementation of our international realignment will not continue to produce anticipated operational and financial benefits, including a continued lower effective tax rate; the loss of our customers; the failure to retain and recruit senior management; product liability claims exposure; a failure to obtain expected returns from the amount of intangible assets we have recorded; the maintenance of our brand; the amount and type of equity awards that we may grant to employees and service providers in the future; our ongoing litigation and related matters; risks related to the global economic marketplace uncertainties related to the impact of the COVID-19 pandemic; and other factors discussed in the “Risk Factors” section of our most recent periodic reports filed with the Securities and Exchange Commission (“SEC”), including our most recent Form 10-K and Form 10-Q, all of which you may obtain for free on the SEC’s website at www.sec.gov. Although we believe that the expectations reflected in our forward-looking statements are reasonable, we do not know whether our expectations will prove correct. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof, even if subsequently made available by us on our website or otherwise. We do not undertake any obligation to update, amend or clarify these forward-looking statements, whether as a result of new information, future events or otherwise, except as may be required under applicable securities laws.

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Masimo, SET, Signal Extraction Technology, Improving Patient Outcome and Reducing Cost of Care... by Taking Noninvasive Monitoring to New Sites and Applications, rainbow, SpHb, SpOC, SpCO, SpMet, PVI and ORI are trademarks or registered trademarks of Masimo Corporation.

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