Masimo Corporation’s SEC filings document material-event disclosures for a medical technology company focused on noninvasive patient monitoring, hospital automation, connectivity and remote monitoring. The filing record includes Form 8-K reports for operating and financial results, Regulation FD materials, exhibits, material agreements, shareholder voting matters, governance matters, capital-structure disclosure and clinical or regulatory disclosure categories.
The company’s filings also document completed corporate actions, including the disposition of the Sound United consumer audio business and related pro forma financial information. Transaction-related filings cover formal agreements, proxy and voting materials, litigation-related disclosures, risk language and other public-company reporting items without changing the company’s healthcare technology identity.
Masimo Corp. Schedule 13G: Pentwater Capital Management reports beneficial ownership of 3,176,000 shares of Common Stock, representing 6.1% of the class. The percentage is calculated on 52,362,808 shares outstanding as of March 31, 2026, as reported in a Form 8-K cited in the filing.
The shares are held by the Pentwater Funds with shared voting and dispositive power reported; Matthew Halbower is disclosed as the sole shareholder of the investment manager's general partner and joined the joint filing.
Barclays PLC reports beneficial ownership of 2,892,262 shares of Masimo Corp common stock, representing 5.54% of the class as of 03/31/2026.
The filing (Schedule 13G) lists Barclays' sole voting and dispositive power over the reported shares. The report names Barclays Bank PLC, Barclays Capital Inc., Barclays Capital Securities Ltd. and Barclays Investment Solutions Limited as relevant subsidiaries. The form is signed by a Barclays director on 05/14/2026.
Joe Kiani reports beneficial ownership of 3,657,039 shares of Masimo Corporation common stock, representing 6.5% of the class. The total percent calculation uses 52,365,808 shares outstanding as of April 4, 2026. The reported position includes a mix of directly held shares, trusts, and multiple equity awards that the reporting person states are subject to dispute with Masimo, including 368,252 Exercised Options, 2,700,000 RSU Award shares, 158,450 Accelerated Options, 198,225 PSUs, and 85,255 Vested Options. The filing explains the issuer declined to process certain exercises and that the company has filed claims in the Delaware Court of Chancery; the reporting person includes contested awards in his beneficial ownership figures for transparency.
Masimo Corporation reported stronger results for the quarter ended April 4, 2026 and highlighted its pending cash acquisition by Danaher. Total revenue from continuing operations was $403.6 million, up from $372.0 million a year earlier, driven mainly by healthcare monitoring products.
Net income was $57.1 million, compared with a loss of $170.7 million in the prior-year period that included large discontinued-operations charges. Continuing operations earned $1.09 diluted income per share. Operating income held steady at $77.4 million despite $17.9 million of merger-related costs in selling, general and administrative expenses.
Masimo agreed to be acquired by Danaher, with each share of Masimo common stock to be converted into the right to receive $180.00 in cash, subject to customary conditions and regulatory approvals. The deal was adopted by stockholders, and Masimo expects to delist its shares if the merger closes.
Masimo Corp director Timothy J. Scannell received an award of 1,119 restricted stock units (RSUs) on April 23, 2026. On April 29, 2026 he converted 1,225 previously granted RSUs into the same number of common shares, resulting in 2,608 common shares held directly. The 2026 RSUs vest in full on the earlier of the first anniversary of grant or the next annual meeting of stockholders.
MASIMO CORP director Wendy E. Lane reported equity compensation activity involving restricted stock units (RSUs). On April 29, 2026, she exercised 1,225 RSUs into the same number of shares of common stock, bringing her direct holdings to 2,608 common shares. This was not an open‑market purchase; it reflects the conversion of a derivative award.
Earlier, on April 23, 2026, Lane received a new grant of 1,119 RSUs, each representing a contingent right to one share of common stock. According to the terms, these RSUs will vest in full on the earlier of the first anniversary of the grant date or the next annual meeting of stockholders following the grant date.
Masimo Corp director Michelle Brennan reported equity compensation activity. She exercised 1,225 restricted stock units into the same number of common shares, leaving her with 8,543 common shares held directly after the transactions.
She also received a new grant of 1,119 restricted stock units, each representing the contingent right to one common share upon vesting. According to the disclosures, these RSUs will vest in full on the earlier of the first anniversary of their grant date or the date of the next annual meeting of stockholders.
Masimo Corp Chief Human Resources Officer Elisabeth A. Hellmann reported routine equity compensation activity involving restricted stock units. On April 21, 2026, 335 restricted stock units granted on April 21, 2025 vested, converting into 335 shares of common stock. In connection with this vesting, 121 shares of common stock were withheld by Masimo to cover tax withholding obligations at a price of $178.43 per share, a non-market disposition. Following these transactions, Hellmann directly holds 214 shares of common stock and 1,005 restricted stock units, each representing the contingent right to receive one Masimo common share upon future vesting.
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 filed Amendment No. 1 to its Form 10-K for fiscal 2025 to add Part III information on directors, executive officers, governance and compensation instead of incorporating a future proxy statement. The filing details a refreshed board and leadership team, including new CEO Catherine Szyman and several recently hired senior executives.
It describes a pay program heavily weighted to performance: 2025 annual bonuses for most named executives were funded at 113% of target, while performance stock units granted in 2023 vested at only 18% of target, reflecting tough three‑year goals. The amendment also notes a pending merger under a February 16, 2026 agreement for Masimo to be acquired by Danaher, subject to regulatory and stockholder approvals, after which Masimo’s stock is expected to be delisted.