Every 8-K that Masimo Corporation (MASI) has filed with the SEC in the last 24 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A 8-K covers material events a company has to report between its quarterly reports, so if you follow MASI and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full MASI filings page.
Masimo Corporation has completed its acquisition by Danaher Corporation. At the merger’s effective time, each outstanding Masimo common share (with certain limited exceptions) was cancelled and converted into the right to receive $180.00 in cash per share, without interest.
Masimo is now a wholly owned subsidiary of Danaher, which funded the transaction with cash on hand. In connection with closing, Masimo repaid in full and terminated its December 1, 2025 Credit Agreement, and all related guarantees were released.
Masimo’s common stock ceased trading on Nasdaq before the market opened on the closing date and will be delisted and deregistered following the filing of Form 25 and Form 15. All prior stockholder rights ended, other than the right to receive the cash merger consideration. Masimo’s pre-closing directors resigned, a Danaher designee became director of the surviving corporation, and most officers continued in their roles. Certain executives entered into separation and short-term consulting agreements and will receive previously arranged change-in-control severance benefits.
Masimo Corporation held a special stockholder meeting where investors approved its cash acquisition by Danaher. Shareholders adopted the Merger Agreement under which each Masimo share will be converted into the right to receive $180.00 in cash at closing, with Masimo becoming a wholly owned Danaher subsidiary.
Of 52,362,808 shares outstanding as of the record date, 37,012,777 shares were represented, forming a quorum. The merger proposal passed with 36,981,681 votes in favor, 17,061 against and 14,035 abstaining. Stockholders also approved, on an advisory basis, merger‑related executive compensation. Completion still depends on customary conditions and required regulatory approvals, and the companies expect the merger to close in 2026.
Masimo Corporation agreed to be acquired by Danaher Corporation in an all-cash merger valuing Masimo at $180.00 per share, or about $9.9 billion. Masimo will become a standalone business unit within Danaher’s Diagnostics segment and continue operating under the Masimo brand.
The deal requires approval from Masimo stockholders, antitrust and foreign investment clearances, and other customary closing conditions. A voting agreement with Politan Capital Management supports the merger, and Masimo could owe Danaher a $305 million termination fee in certain scenarios. Closing is expected in the second half of 2026, after which Masimo’s shares will be delisted and deregistered.
Masimo Corporation filed an 8-K describing how it is sharing early views of its recent performance. On January 12, 2026, the company issued a press release with select preliminary financial results for the fourth quarter and full year ended January 3, 2026, with full audited figures to follow.
Management plans to review complete fourth quarter and full-year 2025 results after the market closes on February 26, 2026. On the same day as the filing, the CEO and EVP & CFO discussed select preliminary results at the 44th Annual J.P. Morgan Healthcare Conference, and Masimo also made available a supplemental 2025 earnings presentation and non-GAAP information as furnished exhibits.
Masimo Corporation furnished an 8‑K announcing it issued a press release with financial results for the quarter ended September 27, 2025, and provided a supplemental investor presentation. The press release (Exhibit 99.1) and supplemental materials (Exhibit 99.2) are furnished under Items 2.02 and 7.01 and are not deemed “filed” for Section 18 liability or incorporated by reference unless expressly stated.
The CFO planned to review third‑quarter 2025 results and an updated outlook for the remainder of fiscal 2025 on a conference call scheduled for November 4, 2025.
Masimo Corporation filed an amendment to a prior current report to add unaudited pro forma financial information related to the completed sale of its consumer audio business to Harman International Industries. The amendment includes a pro forma condensed consolidated balance sheet as of June 28, 2025 and pro forma condensed consolidated statements of operations for the fiscal years ended December 28, 2024, December 30, 2023 and December 31, 2022, along with related notes.
These pro forma statements show how Masimo’s historical financials would look after applying the disposition adjustments and other transaction adjustments tied to the divestiture, helping readers understand the ongoing profile of the company after exiting the consumer audio business.
Masimo Corporation has completed the sale of its consumer audio business, Sound United, to Harman International Industries. The transaction was carried out through the sale of all equity interests in Viper Holdings Corporation, which owns and operates Sound United.
The deal was based on an aggregate purchase price of $350,000,000 in cash, subject to certain adjustments. At closing on September 23, 2025, Masimo received approximately $328,000,000 in cash, which remains subject to post-closing adjustments under the Stock Purchase Agreement. Masimo also issued a press release announcing the closing.
Masimo Corporation reported that William Jellison, a member of its Board of Directors, resigned from the Board effective August 18, 2025. The company stated that his resignation was not due to any disagreement with Masimo on matters related to its operations, policies, or practices, indicating this is not being characterized as a conflict-driven departure.
Board Chair Michelle Brennan thanked Mr. Jellison for his service and contributions during what she described as a transformative period for the company, and extended well wishes for his future endeavors. The filing also includes a technical exhibit for the cover page interactive data file, but no financial results or major transactions are discussed.