SEC Form 4 · accession 0001104659-26-073516

MASIMO CORP · MASI

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Officer — EVP, General Counsel

Period of report

Jun 10, 2026

Accepted (ET)

Jun 12, 2026 · 4:31 pm EDT

Rule 10b5-1 plan

box not checked

Issuer CIK

0000937556

Table I — non-derivative securities

No Table I lines on this filing.

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Restricted Stock Units^F2,F3,F1	—	Jun 10, 2026	D	11,886	D	—	—	Common Stock	11,886	0	D
Restricted Stock Units^F2,F4,F1	—	Jun 10, 2026	D	10,261	D	—	—	Common Stock	10,261	0	D

F1On June 10, 2026, pursuant to the Agreement and Plan of Merger, dated February 16, 2026, by and among Masimo Corporation (the "Issuer"), Danaher Corporation ("Parent"), and Mobius Merger Sub, Inc. ("Merger Sub"), Merger Sub merged with and into the Issuer, with the Issuer continuing as the surviving corporation and a wholly owned subsidiary of Parent (the "Merger").
F2On June 10, 2026, at the effective time of the Merger, each of the Issuer's restricted stock units ("RSUs") (other than certain RSUs held by the Issuer's non-employee directors) was assumed by Parent and converted into a number of RSUs of Parent equal to the product of the number of shares of Parent common stock equal to the number of shares of the Issuer's common stock, par value $0.001 per share underlying such RSU multiplied by the quotient of (a) $180.00 per share, without interest, divided by (b) the volume-weighted average trading price per share of Parent's common stock for the ten trading day period ending on and including June 10, 2026 ($183.33).
F3Represents the unvested portion of RSUs granted on October 22, 2025, which award of RSUs was to vest ratably over four years.
F4Represents the unvested portion of RSUs granted on March 6, 2026, which award of RSUs was to vest ratably over four years.