Monolithic Power Systems director proposes $3.48M sale

Available on EDGAR 11/13/2026 - 06:40 PM EST Accepted by SEC EDGAR 11/13/2026 - 06:39 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Monolithic Power Systems, Inc. (MPWR) director Eugen Elmiger reported a proposed sale of 2,500 common shares, with an aggregate market value of $3,476,350 and an approximate sale date of November 13, 2026. The listed outstanding-share count is 48,732,213.

Key Figures

Proposed sale: 2,500 common shares Aggregate market value: $3,476,350 Approximate sale date: November 13, 2026 +4 more

7 metrics

Proposed sale 2,500 common shares Proposed sale by director Eugen Elmiger

Aggregate market value $3,476,350 For the proposed sale

Approximate sale date November 13, 2026 Proposed sale

Shares outstanding 48,732,213 common shares Count listed in the securities information

Restricted stock units acquired 598 shares Acquired from the issuer on February 7, 2018

Restricted stock units acquired 1,339 shares Acquired from the issuer on February 11, 2019

Restricted stock units acquired 563 shares Acquired from the issuer on February 12, 2020

Key Terms

Restricted Stock Units, Aggregate Market Value

2 terms

Restricted Stock Units financial

"598 shares acquired as Restricted Stock Units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Aggregate Market Value financial

"Aggregate Market Value of $3,476,350"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many MPWR shares did Eugen Elmiger propose to sell, and what was their reported value?

Eugen Elmiger, a director of Monolithic Power Systems, reported a proposed sale of 2,500 MPWR common shares, with an aggregate market value of $3,476,350 and an approximate sale date of November 13, 2026.

What acquisition history is listed for Eugen Elmiger’s MPWR shares?

The listed shares were acquired from the issuer as restricted stock units: 598 shares on February 7, 2018; 1,339 shares on February 11, 2019; and 563 shares on February 12, 2020.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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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	0001560945
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	MONOLITHIC POWER SYSTEMS, INC.
SEC File Number	000-51026
Address of Issuer	1555 PALM BEACH LAKES BLVD. WEST PALM BEACH FLORIDA 33401
Phone	561-839-3999
Name of Person for Whose Account the Securities are To Be Sold	Elmiger Eugen J
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	Director

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	2500	3476350.00	48732213	11/13/2026	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	02/07/2018	Restricted Stock Units	Issuer			598	02/07/2018	N/A
Common Stock	02/11/2019	Restricted Stock Units	Issuer			1339	02/11/2019	N/A
Common Stock	02/12/2020	Restricted Stock Units	Issuer			563	02/12/2020	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	11/13/2026
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	/s/ Eugen Elmiger
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)