Masimo (MASI) awards EVP of Operations 6,840 restricted stock units

Rhea-AI Filing Summary

Sampath Anand reported acquisition or exercise transactions in this Form 4 filing.

Masimo Corp executive vice president of operations Anand Sampath received a grant of 6,840 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 vests in four equal annual installments of 25%, and after this grant he holds 6,840 RSUs directly.

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^*

Sampath Anand

(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, Operations

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		6,840		(2)	03/06/2036	Common Stock	6,840	$0	6,840	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).
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FAQ

What insider transaction did MASIMO CORP (MASI) report for Anand Sampath?

Masimo reported that EVP of Operations Anand Sampath received 6,840 restricted stock units as a compensation grant. The award was made on March 6, 2026 and gives him rights to the same number of Masimo common shares upon vesting, subject to the vesting schedule.

How many restricted stock units were granted to Masimo executive Anand Sampath?

Anand Sampath was granted 6,840 restricted stock units. Each RSU represents a contingent right to receive one share of Masimo common stock, so the grant aligns his compensation with future share performance as the units vest over time according to the stated schedule.

What is the vesting schedule for Anand Sampath’s 6,840 Masimo RSUs?

The 6,840 RSUs granted to Anand Sampath vest ratably over four years. Twenty‑five percent of the award vests on each anniversary of the March 6, 2026 grant date, meaning the full award will be vested after four years if service conditions are satisfied.

Does the Masimo RSU grant to Anand Sampath involve any purchase or sale of shares?

The RSU grant is reported as a grant or award acquisition, not an open‑market purchase or sale. Sampath acquired 6,840 RSUs at a stated price of zero per unit as part of his compensation, with future common shares delivered only upon vesting.

How many Masimo RSUs does Anand Sampath hold after this reported transaction?

After the reported RSU grant, Anand Sampath holds a total of 6,840 restricted stock units directly. This figure reflects his position following the March 6, 2026 award, and each RSU may convert into one share of common stock as vesting occurs.