Monolithic Power (MPWR) EVP logs indirect sale of 200 shares via trust

Rhea-AI Filing Summary

Monolithic Power Systems executive Maurice Sciammas, EVP of Worldwide Sales & Marketing, reported an indirect open‑market sale of 200 shares of Common Stock on February 11, 2026. The shares were sold at $1,179.975 per share by the Clement Sciammas Trust, an entity associated with him.

After this sale, the Clement Sciammas Trust held 1,299 shares. The filing also shows other beneficial holdings, including 178,625 shares held directly and additional indirect positions through various Sciammas family trusts and brokerage accounts.

Insights

Equity analyst

Small indirect insider sale with broad family trust holdings disclosed.

Executive vice president Maurice Sciammas reported an indirect open‑market sale of 200 shares of Monolithic Power Systems Common Stock on February 11, 2026. The transaction was executed at $1,179.975 per share through the Clement Sciammas Trust.

Following the sale, that trust held 1,299 shares. The Form 4 also lists substantial additional beneficial ownership, including 178,625 shares held directly and multiple indirect positions via family trusts and brokerage accounts. These entries describe ownership structure rather than new trading activity.

This type of transaction is typically viewed as a routine portfolio move, especially given the executive’s larger disclosed holdings. Actual significance depends on the broader context of his historical trading patterns and total company share count, which are not detailed in this excerpt.

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
Estimated average burden
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^*

Sciammas Maurice

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP, WW Sales & Marketing

3. Date of Earliest Transaction (Month/Day/Year)
02/11/2026

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	02/11/2026		S		200	D	$1,179.975	1,299	I	Clement Sciammas Trust
Common Stock								178,625	D
Common Stock								1,699	I	The Joseph Roger Sciammas 2020 Irrevocable Trust
Common Stock								2,000	I	Rosalind Sciammas Family 2021 Trust
Common Stock								1,299	I	Rosalind Sciammas Brokerage Account
Common Stock								49,460	I	Sciammas Family Trust
Common Stock								26,660	I	Various Sciammas GRATs
Common Stock								1,699	I	The Patrick Francis Sciammas 2020 Irrevocable Trust
Common Stock								4,015	I	By Sciammas Trust 2020
Common Stock								1,000	I	Peter Rafferty and Eric Toothill 2021Trust
Common Stock								1,699	I	The Chloe Liliane Sciammas 2020 Irrevocable Trust
Common Stock								5,000	I	Clement Sciammas Family 2021 Trust

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:

Remarks:

	/s/ Saria Tseng, attorney-in-fact for Mr. Maurice Sciammas	02/12/2026
	** 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 insider transaction did MPWR executive Maurice Sciammas report on this Form 4?

Maurice Sciammas reported an indirect sale of 200 MPWR shares. On February 11, 2026, 200 shares of Monolithic Power Systems Common Stock were sold in an open‑market transaction at $1,179.975 per share through the Clement Sciammas Trust associated with him.

At what price were the 200 MPWR shares sold by the Clement Sciammas Trust?

The 200 MPWR shares were sold at $1,179.975 per share. The Form 4 specifies an open‑market sale price of $1,179.975 for each share of Monolithic Power Systems Common Stock sold on February 11, 2026, through the Clement Sciammas Trust.

How many MPWR shares did the Clement Sciammas Trust hold after the reported sale?

The Clement Sciammas Trust held 1,299 MPWR shares after the sale. Following the February 11, 2026 open‑market transaction, the Form 4 shows that the Clement Sciammas Trust’s beneficial ownership position in Monolithic Power Systems Common Stock stood at 1,299 shares.

What are Maurice Sciammas’s other reported holdings of Monolithic Power Systems (MPWR) stock?

The filing lists 178,625 MPWR shares held directly by Maurice Sciammas. It also discloses additional indirect holdings through various Sciammas family trusts, brokerage accounts, GRATs, and irrevocable trusts, each with its own reported share balance as of the filing date.

Is the 200‑share MPWR transaction by Maurice Sciammas direct or indirect ownership?

The 200‑share MPWR transaction reflects indirect ownership. The Form 4 identifies the sale as an indirect open‑market transaction, with ownership coded as indirect and the nature of ownership described as the Clement Sciammas Trust rather than direct personal holdings.