Politan Comments on Masimo’s Recent Board Announcement

Politan Capital Management (together with its affiliates, “Politan”), a 9% shareholder of Masimo Corporation (“Masimo” or the “Company”) (NASDAQ: MASI), today commented on the Company’s recent announcement that it would authorize expanding its Board and adding Politan nominee Michelle Brennan – contingent on the reelection of all incumbent Masimo directors at the upcoming Annual Meeting of Stockholders (the “Annual Meeting”).

Quentin Koffey, Managing Partner and Chief Investment Officer of Politan, stated:

“Meaningful change is clearly needed on Masimo’s Board. For years, Masimo has gone to extreme and well-documented lengths to avoid this occurring. Making Michelle’s appointment contingent on all incumbent directors being elected is not progress – it is yet another defensive maneuver to impede shareholder-driven change.

Michelle would be an exceptional addition to Masimo’s Board. Her deep expertise from decades spent in relevant roles at Johnson & Johnson, in addition to her experience as a public company director, make her an ideal fit to help Masimo. The opportunity to do so is why she is participating in this election. Michelle wants to be able to bring the type of positive, substantive improvement to the Company that has been outlined in Politan’s campaign and will only be possible with a real level of change.

If elected, Michelle and I will be fully committed from day one to working constructively alongside the other directors to further the best interests of the Company. While we unfortunately expect the emotive attacks from Masimo to continue leading up to the vote, we encourage shareholders to look past these unproductive distractions. We believe the facts and analysis we have presented – all of which are carefully supported – speak for themselves. We look forward to continuing to engage with our fellow shareholders in the weeks ahead.”

Politan encourages shareholders to review its presentation, proxy materials and letter to shareholders, all of which are available at www.AdvanceMasimo.com. Shareholders can support real change at Masimo by voting on the BLUE proxy card FOR the election of Michelle Brennan and Quentin Koffey.

CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

The information herein contains “forward-looking statements.” Specific forward-looking statements can be identified by the fact that they do not relate strictly to historical or current facts and include, without limitation, words such as “may,” “will,” “expects,” “believes,” “anticipates,” “plans,” “estimates,” “projects,” “potential,” “targets,” “forecasts,” “seeks,” “could,” “should” or the negative of such terms or other variations on such terms or comparable terminology. Similarly, statements that describe our objectives, plans or goals are forward-looking. Forward-looking statements are subject to various risks and uncertainties and assumptions. There can be no assurance that any idea or assumption herein is, or will be proven, correct. If one or more of the risks or uncertainties materialize, or if Politan’s (defined below) underlying assumptions prove to be incorrect, the actual results may vary materially from outcomes indicated by these statements. Accordingly, forward-looking statements should not be regarded as a representation by Politan that the future plans, estimates or expectations contemplated will ever be achieved.

Certain statements and information included herein have been sourced from third parties. Politan does not make any representations regarding the accuracy, completeness or timeliness of such third-party statements or information. Except as may be expressly set forth herein, permission to cite such statements or information has neither been sought nor obtained from such third parties. Any such statements or information should not be viewed as an indication of support from such third parties for the views expressed herein.

CERTAIN INFORMATION CONCERNING THE PARTICIPANTS

Politan Capital Management LP (“Politan”) and the other Participants (as defined below) have filed a definitive proxy statement and accompanying BLUE universal proxy card with the Securities and Exchange Commission (the “SEC”) to be used to solicit proxies for, among other matters, the election of its slate of director nominees at the 2023 annual stockholders meeting (the “2023 Annual Meeting”) of Masimo Corporation, a Delaware corporation (“Masimo”).

The participants in the proxy solicitation are Politan, Politan Capital Management GP LLC, Politan Capital Partners GP LLC, Politan Capital NY LLC, Politan Intermediate Ltd., Politan Capital Partners Master Fund LP (“Politan Master Fund”), Politan Capital Partners LP (“Politan LP”), Politan Capital Offshore Partners LP (“Politan Offshore” and collectively with Politan Master Fund and Politan LP, the “Politan Funds”), Quentin Koffey, Matthew Hall, Aaron Kapito and Michelle Brennan (collectively, the “Participants”).

As of the date hereof, (i) Politan Master Fund directly owns 4,712,518 shares of common stock, par value $0.001 per share, of Masimo (the “Common Stock”), and (ii) Politan Capital NY LLC is the direct and record owner of 1,000 shares of Common Stock.

Politan, as the investment adviser to the Politan Funds, may be deemed to have the shared power to vote or direct the vote of (and the shared power to dispose or direct the disposition of) 4,713,518 shares of Common Stock (the “Politan Shares”) and, therefore, Politan may be deemed to be the beneficial owner of all of the Politan Shares. The Politan Shares collectively represent approximately 8.9% of the outstanding shares of Common Stock based on 52,779,770 shares of Common Stock outstanding as of April 1, 2023, as reported in Masimo’s Quarterly Report on Form 10-Q filed on May 10, 2023. As the general partner of Politan, Politan Capital Management GP LLC may be deemed to have the shared power to vote or direct the vote of (and the shared power to dispose or direct the disposition of) all of the Politan Shares and, therefore, Politan Capital Management GP LLC may be deemed to be the beneficial owner of all of the Politan Shares. As the general partner of the Politan Funds, Politan Capital Partners GP LLC may be deemed to have the shared power to vote or to direct the vote of (and the shared power to dispose or direct the disposition of) all of the Politan Shares and, therefore, Politan Capital Partners GP LLC may be deemed to be the beneficial owner of all of the Politan Shares. By virtue of Mr. Koffey’s position as the managing partner and chief investment officer of Politan and as the managing member of Politan Capital Management GP LLC and Politan Capital Partners GP LLC, Mr. Koffey may be deemed to have the shared power to vote or direct the vote of (and the shared power to dispose or direct the disposition of) all of the Politan Shares and, therefore, Mr. Koffey may be deemed to be the beneficial owner of all of the Politan Shares. As of the date hereof, none of Mr. Hall, Mr. Kapito or Ms. Brennan own beneficially or of record any shares of Common Stock.

IMPORTANT INFORMATION AND WHERE TO FIND IT

POLITAN STRONGLY ADVISES ALL STOCKHOLDERS OF MASIMO TO READ THE DEFINITIVE PROXY STATEMENT, ANY AMENDMENTS OR SUPPLEMENTS TO SUCH PROXY STATEMENT AND OTHER PROXY MATERIALS FILED BY POLITAN WITH THE SEC AS THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION. SUCH PROXY MATERIALS WILL BE AVAILABLE AT NO CHARGE ON THE SEC’S WEBSITE AT WWW.SEC.GOV. THE DEFINITIVE PROXY STATEMENT AND OTHER RELEVANT DOCUMENTS, ARE ALSO AVAILABLE ON WWW.ADVANCEMASIMO.COM AND THE SEC WEBSITE, FREE OF CHARGE, OR BY DIRECTING A REQUEST TO THE PARTICIPANTS’ PROXY SOLICITOR, D.F. KING & CO., INC., 48 WALL STREET, 22ND FLOOR, NEW YORK, NEW YORK 10005 (STOCKHOLDERS CAN CALL TOLL-FREE: +1 (866) 620-9554).

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