Masimo (MASI) Chief Commercial Officer granted 8,550 RSUs in new Form 4

Rhea-AI Filing Summary

Meehan Greg Allen reported acquisition or exercise transactions in this Form 4 filing.

MASIMO CORP Chief Commercial Officer Greg Allen Meehan received a grant of 8,550 restricted stock units on March 6, 2026. Each RSU represents the right to receive one share of Masimo common stock when it vests. The award will vest in equal 25% installments on each anniversary of the grant date over four years. Following this grant, Meehan is reported as directly holding 8,550 RSUs linked to Masimo common stock.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Meehan Greg Allen

(Last) (First) (Middle)

C/O MASIMO CORPORATION

52 DISCOVERY

(Street)

IRVINE CA 92618

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
MASIMO CORP [ MASI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Commerical Officer

3. Date of Earliest Transaction (Month/Day/Year)
03/06/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(1)	03/06/2026		A		8,550		(2)	03/06/2036	Common Stock	8,550	$0	8,550	D

Explanation of Responses:

1. Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of the Issuer upon vesting of the RSU.

2. This RSU award was granted on March 6, 2026 and will vest ratably over four years, with 25% of the award vesting on each anniversary of the grant date.

Remarks:

	/s/ Micah W. Young, Attorney-In-Fact	03/10/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did MASIMO CORP executive Greg Allen Meehan report on this Form 4 for MASI?

Greg Allen Meehan reported receiving 8,550 restricted stock units tied to Masimo common stock. The RSUs were granted on March 6, 2026 and represent a contingent right to receive shares as they vest over time.

How many restricted stock units did MASI’s Chief Commercial Officer receive in this grant?

The Chief Commercial Officer received 8,550 restricted stock units in this transaction. Each unit is linked to one share of Masimo common stock, providing equity-based compensation that vests gradually rather than an immediate cash or open-market stock purchase.

How do the MASI restricted stock units granted to Greg Allen Meehan vest over time?

The 8,550 restricted stock units vest ratably over four years from the March 6, 2026 grant date. Twenty‑five percent of the award vests on each anniversary of the grant, meaning the units convert to common shares in four equal annual installments.

Does this MASI Form 4 reflect a stock purchase or sale on the open market?

This Form 4 does not show an open‑market stock purchase or sale. It reports a grant of 8,550 restricted stock units as compensation, giving a future right to receive Masimo common shares as vesting conditions are met over four years.

What does each MASI restricted stock unit represent in Greg Allen Meehan’s grant?

Each restricted stock unit represents the contingent right to receive one share of Masimo common stock upon vesting. The RSUs do not deliver shares immediately; instead, common shares are issued as the award vests on each annual anniversary date.

What is Greg Allen Meehan’s derivative position in MASI after this RSU grant?

After the grant, Greg Allen Meehan is shown as directly holding 8,550 restricted stock units. These RSUs are derivatives linked to Masimo common stock and will convert into shares only as the units vest under the four‑year vesting schedule described.