Masimo Corp: 5%+ holders

Masimo Corp has 13 Schedule 13D or 13G filings on record since 2025-08-12. 2 holders' latest filing reports 5% or more of common stock, par value $0.001 per share. Each figure below is the holder's own, as filed, with the filing linked.

Holders

Purpose of Transaction (Item 4)

Politan Capital Management LP

Item 4 is hereby amended and supplemented as follows: On June 10, 2026 (the "Closing Date"), the Merger was consummated pursuant to the Merger Agreement. At the effective time of the Merger (the "Effective Time"), Merger Sub merged with and into the Issuer, with the Issuer continuing as the surviving corporation and a wholly owned subsidiary of Parent. At the Effective Time, each share of Common Stock issued and outstanding immediately prior to the Effective Time (other than shares excluded or treated as described in the Merger Agreement) was automatically cancelled, extinguished and converted into the right to receive an amount in cash equal to $180.00 per share, without interest and less any applicable withholding taxes (the "Per Share Merger Consideration"). Accordingly, the 4,590,873 shares of Common Stock beneficially owned by the Reporting Persons immediately prior to the Effective Time were converted into the right to receive the Per Share Merger Consideration. In addition, the 1,119 restricted share units held by Mr. Koffey, as a non-employee director of the Issuer, were cancelled and converted at the Effective Time into the right to receive an amount in cash equal to the Per Share Merger Consideration for each share of Common Stock underlying such restricted share units. As a result of the Merger, the Reporting Persons ceased to beneficially own any shares of Common Stock.Item 4 of the SCHEDULE 13D/A filed 2026-06-11

Timeline

Where this comes from

Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.

Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.

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