Masimo (NASDAQ: MASI) CFO gets 17,671 RSUs vesting over 4 years

Rhea-AI Filing Summary

Young Micah W reported acquisition or exercise transactions in this Form 4 filing.

MASIMO CORP Executive Vice President and Chief Financial Officer Micah W Young reported receiving a grant of 17,671 restricted stock units (RSUs) on March 6, 2026. Each RSU represents the right to receive one share of Masimo common stock upon vesting.

The award will vest ratably over four years, with 25% of the RSUs vesting on each anniversary of the grant date. Following this grant, Young holds 17,671 RSUs directly, aligning his compensation further with future Masimo share performance.

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^*

Young Micah W

(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)
	EVP & Chief Financial 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		17,671		(2)	03/06/2036	Common Stock	17,671	$0	17,671	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 transaction did Masimo (MASI) CFO Micah W Young report on Form 4?

Micah W Young reported a grant of restricted stock units. As Masimo’s EVP and CFO, he received 17,671 RSUs on March 6, 2026. These units are part of his equity compensation and convert into common shares only as they vest over time.

How many restricted stock units did the Masimo (MASI) CFO receive and when do they vest?

The CFO received 17,671 restricted stock units. The award was granted on March 6, 2026 and vests ratably over four years, with 25% of the RSUs vesting on each anniversary of the grant date, creating a long-term incentive structure.

What does each Masimo (MASI) restricted stock unit in this grant represent?

Each RSU represents one share of Masimo common stock. The filing states that every restricted stock unit gives a contingent right to receive one common share when it vests, meaning Young’s 17,671 RSUs can become 17,671 shares if fully vested.

Does this Masimo (MASI) Form 4 show a stock purchase or sale by the CFO?

The filing shows an equity grant, not a market trade. The transaction code is “A” for a grant or award acquisition of 17,671 RSUs, at a price of $0.00 per unit, with no open-market buying or selling reported.

What are Micah W Young’s holdings after this Masimo (MASI) RSU grant?

After the grant, Young holds 17,671 RSUs directly. The Form 4 reports total derivative securities following the transaction as 17,671 restricted stock units, all tied to future delivery of Masimo common shares as the award vests over four years.

How long does the Masimo (MASI) CFO’s RSU award remain outstanding?

The RSU award carries an expiration date in 2036. The Form 4 lists March 6, 2036 as the expiration date for this RSU grant, while vesting occurs in four equal annual installments starting one year after the March 6, 2026 grant date.