Company · Ownership research

MASIMO CORP MASI

CIK 0000937556

Form 3 statements with an event date from Nov 1, 2023 to Nov 9, 2026.

Insider trading Initial holdings Institutional holders

Where insider ownership starts.

Form 3 is an initial ownership statement filed when someone becomes a reporting insider. These holdings do not mean they bought shares that day.

20256 of 6 statements

Holdings date	Insider	Initial holdings
Aug 18, 2025	Dadswell Charles Director	No securities reported	▾
Jul 31, 2025	Ahmed Omar CTIO & EVP of Engineering	1.77K shares · 7 equity awards	▾
Jul 31, 2025	Meehan Greg Allen Chief Commerical Officer	2 derivative holdings	▾
Jul 31, 2025	Benner Tim Chief Marketing Officer	2 derivative holdings	▾
Apr 21, 2025	Hellmann Elisabeth A Chief Human Resources Officer	No securities reported	▾
Feb 12, 2025	Szyman Catherine M. CEO · Director	No securities reported	▾

Showing 6 / 6 statements in 2025. The complete set is available through the API.

MASIMO CORP · MASI

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.