Monolithic Power (NASDAQ: MPWR) director receives 189-share RSU grant

Rhea-AI Filing Summary

Monolithic Power Systems director Eugen J. Elmiger reported an equity award from the company. On February 3, 2026, he acquired 189 shares of common stock at a stated price of $0, reflecting an annual restricted stock unit grant to each independent director.

After this grant, Elmiger directly owned 17,402 shares of Monolithic Power Systems common stock. The RSU grant will vest one year after the grant date, provided he continues to serve the company as an independent director.

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

OMB APPROVAL

OMB Number:			3235-0287
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hours per response:			0.5

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^*

Elmiger Eugen J

(Last) (First) (Middle)

1555 PALM BEACH LAKES BLVD.

(Street)

WEST PALM BEACH FL 33401

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
02/03/2026

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
Common Stock	02/03/2026		A		189(1)	A	$0	17,402	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. On February 3, 2026, the Board of Directors approved the annual restricted stock unit grant to each independent director. The RSU grant will vest one year after the grant date, subject to continued service with the company.

Remarks:

	/s/ Saria Tseng, attorney-in-fact for Mr. Eugen J. Elmiger	02/03/2026
	** 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 does the latest Form 4 for MPWR disclose about director Eugen J. Elmiger?

The filing shows director Eugen J. Elmiger received 189 shares of Monolithic Power Systems common stock as part of an annual restricted stock unit grant, approved on February 3, 2026. Following this equity award, he directly owned 17,402 shares in total.

How many MPWR shares did Eugen J. Elmiger acquire and at what price?

Eugen J. Elmiger acquired 189 shares of Monolithic Power Systems common stock at a stated price of $0 per share. This reflects an equity grant rather than an open-market purchase, tied to his role as an independent director of the company.

What is Eugen J. Elmiger’s total Monolithic Power Systems share ownership after this grant?

After the reported transaction, Eugen J. Elmiger directly owned 17,402 shares of Monolithic Power Systems common stock. This total includes the 189-share annual restricted stock unit grant approved on February 3, 2026 by the company’s Board of Directors.

What are the vesting terms of the RSU grant to MPWR independent directors?

The annual restricted stock unit grant to each independent director will vest one year after the February 3, 2026 grant date. Vesting is conditioned on the director’s continued service with Monolithic Power Systems during that one-year period following the award.

Is the MPWR director equity award a one-time grant or part of an annual program?

The Form 4 describes the transaction as an annual restricted stock unit grant to each independent director. This indicates the 189-share award to Eugen J. Elmiger is part of a recurring annual equity compensation program approved by the company’s Board of Directors.