Monolithic Power (MPWR) Form 144 Filed for 4,000-Share Sale

Rhea-AI Filing Summary

Form 144 filing for Monolithic Power Systems, Inc. (MPWR). The notice reports a proposed sale of 4,000 shares of Common Stock on the NASDAQ with an aggregate market value of $3,386,844.86 and approximately 47,904,694 shares outstanding. The proposed approximate sale date is 08/29/2025, and the broker listed is Luzerner Kantonalbank AG, Pilatusstrasse 12, Luzern. The securities to be sold were acquired as Restricted Stock Units from the issuer on 10/23/2013 (2,500 shares) and 10/23/2014 (1,500 shares). The filer reports no securities sold by the person in the past three months. The filing includes the standard seller representation regarding material nonpublic information and a signature/attestation statement.

Insights

Securities Analyst

TL;DR: Routine insider sale notice for 4,000 RSU-derived shares; disclosure lists broker, acquisition dates, and aggregate market value.

The filing is a standard Rule 144 notice indicating an intent to sell shares that originated from Restricted Stock Units granted in 2013 and 2014. It specifies the broker, the approximate sale date, and the aggregate market value of the proposed sale. No prior sales in the last three months are reported, which limits immediate pattern assessment. The form includes the required attestation that the seller is not aware of undisclosed material adverse information. From an investor-information perspective, this document provides transaction mechanics but does not disclose the seller's identity or context that would allow assessment of material impact on the company or share supply beyond the stated quantities.

Corporate Governance Expert

TL;DR: Administrative compliance filing under Rule 144 showing disposition of RSU-derived shares; no governance red flags disclosed.

The notice appears to meet Rule 144 reporting requirements by documenting the class of security, acquisition method (RSUs), acquisition dates, and planned sale date. It includes broker information and the issuer share count used to calculate outstanding shares. The filing contains the standard certification about lack of material nonpublic information. There are no statements about any trading plans, 10b5-1 adoption dates, or insider identity in the provided content, so governance implications are limited to confirming procedural compliance only.

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	Luzerner Kantonalbank AG Pilatusstrasse 12 Luzern V8 6003	4000	3386844.86	47904694	08/29/2025	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	10/23/2013	Restricted Stock Units	Issuer			2500	10/23/2013	Not Applicable
Common Stock	10/23/2014	Restricted Stock Units	Issuer			1500	10/23/2014	Not Applicable

* 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)

FAQ

What does the MPWR Form 144 disclose about the planned sale?

The filing discloses a proposed sale of 4,000 shares of Common Stock on 08/29/2025 via Luzerner Kantonalbank AG with an aggregate market value of $3,386,844.86.

How were the shares to be sold acquired according to the filing?

The shares were acquired as Restricted Stock Units from the issuer: 2,500 shares on 10/23/2013 and 1,500 shares on 10/23/2014.

Does the filing report any securities sold by the seller in the past three months?

No. The filing states "Nothing to Report" for securities sold during the past three months by the person for whose account the securities are to be sold.

Which exchange and broker are listed for the planned sale?

The planned sale is listed for NASDAQ and the broker is Luzerner Kantonalbank AG, Pilatusstrasse 12, Luzern.

Does the filing indicate the seller knows of any material nonpublic information?

By signing the notice the person represents they do not know any material adverse information