SEC FORM 4

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).

1. Name and Address of Reporting Person^*

Sciammas Maurice

(Last)

(First)

(Middle)

5808 LAKE WASHINGTON BLVD NE

(Street)

KIRKLAND

98033

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
MONOLITHIC POWER SYSTEMS INC [ MPWR ]

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

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	Sr. V.P.of Sales and Marketing

3. Date of Earliest Transaction (Month/Day/Year)
05/14/2021

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	05/14/2021		G		9,015	D	$0.00⁽¹⁾	297,316	D
Common Stock	05/14/2021		G		9,015	A	$0.00	23,015	I	By Sciammas Trust 2020⁽²⁾
Common Stock	05/28/2021		G		9,000	D	$0.00⁽¹⁾	288,316	D
Common Stock	05/28/2021		G		5,000	A	$0.00	5,000	I	Clement Sciammas Family 2021 Trust⁽³⁾
Common Stock	05/28/2021		G		2,000	A	$0.00	2,000	I	Rosalind Sciammas Family 2021 Trust⁽⁴⁾
Common Stock	05/28/2021		G		2,000	A	$0.00	2,000	I	Peter Rafferty and Eric Toothill 2021Trust⁽⁵⁾
Common Stock	07/01/2021		S⁽⁶⁾		4,305	D	$370.45	284,011	D

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. The reported transaction involved a transfer of securities by gift for which no payment of consideration was received by the reporting person.

2. Represents shares of stock owned by The Sciammas Family 2020 Irrevocable Trust DTD 04/29/2020. The reporting person is the trustee of the Sciammas Family 2020 Irrevocable Trust.

3. Represents shares of stock owned by The Clement Sciammas Family 2021 Irrevocable Trust DTD 5/25/2021. The reporting person is the trustee of the Clement Sciammas Family Trust.

4. Represents shares of stock owned by The Rosalind Sciammas Family 2021 Irrevocable Trust DTD 5/25/2021. The reporting person is the trustee of the Rosalind Sciammas Family Trust.

5. Represents shares of stock owned by The Peter Rafferty and Eric Toothill 2021 Irrevocable Trust DTD 05/26/21. The reporting person is the trustee of the Peter Rafferty and Eric Toothill Trust.

6. The reported sales were to cover taxes upon the vesting of restricted stock units, as required by the Company's equity incentive plan.

Remarks:

	/s/ Saria Tseng, attorney-in-fact for Mr. Maurice Sciammas	07/06/2021
	** 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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