[144] Monolithic Power Systems, Inc. SEC Filing

Rhea-AI Filing Summary

Monolithic Power Systems (MPWR) filed a Form 144 to notify a proposed sale of 1,499 shares of common stock through UBS Financial Services Inc. on 08/22/2025 on the NASDAQ. The filing shows an aggregate market value of 1,229,180 and reports 49,780,000 shares outstanding. The shares were received via GRAT distributions on 08/19/2025 from Maurice Sciammas in three lots of 669, 81, and 749 shares with related acquisition dates and prior donor acquisition dates noted. The filer reports no securities sold by the person in the past three months and certifies there is no undisclosed material adverse information about the issuer.

Insights

Securities Analyst

TL;DR Form 144 notifies a small proposed insider sale of 1,499 MPWR shares via UBS on 08/22/2025; filing appears procedural and compliant.

The filing discloses the mechanics of the transfer: shares were distributed from a Grantor Retained Annuity Trust (GRAT) to the person for whose account the sale is proposed, with three separate lots totaling 1,499 shares. The broker, sale date, aggregate market value, and outstanding shares are provided, and the filer indicates no sales in the past three months. From a market-impact perspective, the quantity represents a de minimis portion of the 49.78 million shares outstanding shown, and the filing serves primarily as required disclosure under Rule 144 rather than signaling a material corporate development.

Corporate Governance Expert

TL;DR The Form 144 documents compliance with disclosure rules for an insider-related transfer; no governance red flags are evident from the document alone.

The document specifies the relationship of the transferor (GRAT distribution from Maurice Sciammas) and includes the statutory representation that no material nonpublic information is known to the seller. There are no reported sales in the prior three months. The filing is concise and focused on regulatory compliance; it does not include information about changes to management, control, or other governance actions.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common Stock	UBS Financial Services Inc 1000 Harbor Blvd 3rd Floor Weehawken NJ 07086	1499	1229180	48780000	08/22/2025	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common Stock	08/19/2025	GRAT DISTRIBUTION	MAURICE SCIAMMAS		08/22/2025	669	05/07/2014	N/A
Common Stock	08/19/2025	GRAT DISTRIBUTION	MAURICE SCIAMMAS		08/19/2025	81	05/02/2018	N/A
Common Stock	08/19/2025	GRAT DISTRIBUTION	Maurice Sciammas		08/19/2025	749	11/07/2020	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks

Date of Notice

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)