Masimo Corporation

Item 5.07 Submission of Matters to a Vote of Security Holders. On May 1, 2026, Masimo Corporation, a Delaware corporation (the “Company”), held a special meeting of stockholders (the “Special Meeting”) to consider certain proposals related to the Agreement and Plan of Merger, dated as of February 16, 2026 (the “Merger Agreement”), by and among the Company, Danaher Corporation, a Delaware corporation (“Parent”), and Mobius Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of Parent (“Merger Sub”). The Merger Agreement provides that, among other things and on the terms and subject to the conditions set forth therein, Merger Sub will merge with and into the Company (the “Merger”), with the Company surviving the Merger as a wholly owned subsidiary of Parent. As of the close of business on March 31, 2026, the record date for the Special Meeting (the “Record Date”), there were a total of 52,362,808 shares of common stock, par value $0.001 per share, of the Company (“Company Common Stock”) issued and outstanding, each of which was entitled to one vote for each proposal at the Special Meeting. At the Special Meeting, a total of 37,012,777 shares of Company Common Stock, or approximately 70.68% of the Company Common Stock issued and outstanding as of the Record Date, were represented in person or by proxy, which constituted a quorum for the Special Meeting. At the Special Meeting, the Company’s stockholders voted on the following proposals and cast their votes as described below. For more information on each of these proposals, see the definitive proxy statement filed by the Company with the U.S. Securities and Exchange Commission (the “ SEC ”) on April 1, 2026. Proposal No. 1: To adopt the Merger Agreement (the “Merger Agreement Proposal”). The Merger Agreement Proposal was approved by the votes indicated below: For Against Abstentions ──────────────────────────────────────────── 36,981,681 17,061 14,035 Proposal No. 2: To approve, on a non-binding, advisory basis, the compensation that may be paid or become payable to the named executive officers of the Company that is based on or otherwise relates to the Merger (the “Compensation Proposal”). The Compensation Proposal was approved by the votes indicated below: For Against Abstentions ────────────────────────────────────────────── 34,561,175 1,993,422 458,180 No other matters were considered and voted on by the Company’s stockholders at the Special Meeting.

Item 7.01 Regulation FD Disclosure On May 4, 2026, the Company issued a press release announcing the results of the Special Meeting. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. In accordance with General Instructions B.2 of Form 8-K, the information in Item 7.01 of this Current Report on Form 8-K and Exhibit 99.1 shall not be deemed “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liability of that section, and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.