MPWR Form 144: Proposed Common Stock Sales Listed

MPWR submitted a Form 144 notice relating to proposed sales of Common Stock and disclosed several Restricted Stock Units grant dates and quantities.

Rhea-AI Filing Summary

MPWR submitted a Form 144 notice relating to proposed sales of Common Stock and disclosed several Restricted Stock Units grant dates and quantities. The excerpt lists numeric values including 12000, 19,828,200.00, and 49,135,998, with an apparent date of 05/07/2026 and NASDAQ as the market. The filing also itemizes specific RSU awards dated from 10/23/2012 through 02/07/2018 with award counts (for example, 1,235, 3,493, 2,553).

Key Figures

Market: NASDAQ Reference number: 12000 Numeric value: 19,828,200.00 +5 more

8 metrics

Market NASDAQ listed market in excerpt

Reference number 12000 numeric value shown near securities header

Numeric value 19,828,200.00 numeric value shown in excerpt

Numeric value 49,135,998 numeric value shown in excerpt

Form date 05/07/2026 date appearing alongside market designation

RSU award (10/23/2012) 1,235 shares Restricted Stock Units dated 10/23/2012

RSU award (02/11/2014) 3,493 shares Restricted Stock Units dated 02/11/2014

RSU award (02/09/2015) 2,553 shares Restricted Stock Units dated 02/09/2015

Key Terms

Restricted Stock Units, Form 144, Common Stock

3 terms

Restricted Stock Units financial

"Restricted Stock Units | Issuer | 1,235 | 10/23/2012"

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.

Form 144 regulatory

"CONTENT METADATA: form_type: "144""

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Common Stock financial

"Common Stock | Luzerner Kantonalbank AG Pilatusstrasse"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

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

What does MPWR's Form 144 disclose about planned sales?

It notifies proposed sales of Common Stock and lists RSUs. The excerpt cites figures such as 12000, 19,828,200.00, and 49,135,998, and references NASDAQ and the date 05/07/2026.

Which RSU grant dates and quantities are listed in the MPWR excerpt?

Several historical RSU grants are itemized by date and count. Examples include grants on 10/23/2012 (1,235), 02/11/2014 (3,493), and 02/09/2015 (2,553).

Does the excerpt state proceeds or who will receive sale proceeds for MPWR?

The provided excerpt does not state explicit proceeds recipients. It lists securities and quantities but does not specify cash‑flow treatment or allocation of proceeds.

Is timing specified for the proposed sales in MPWR's Form 144?

A date 05/07/2026 appears in the excerpt. The document shows that date alongside NASDAQ, but detailed timing or transaction mechanics are not provided in the excerpt.

How many RSU award line items are visible in the MPWR excerpt?

Multiple RSU line items are visible spanning 2012–2018. The excerpt shows at least six distinct RSU grant lines with award counts such as 1,235, 3,493, 2,553, 2,181, 1,566, and 972.

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

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Accepted by SEC EDGAR 05/06/2026 - 08:32 PM EDT Learn about SEC filing dates

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	12000	19828200.00	49135998	05/07/2026	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	10/23/2012	Restricted Stock Units	Issuer			1235	10/23/2012	N/A
Common Stock	02/11/2014	Restricted Stock Units	Issuer			3493	02/11/2014	N/A
Common Stock	02/09/2015	Restricted Stock Units	Issuer			2553	02/09/2015	N/A
Common Stock	04/28/2016	Restricted Stock Units	Issuer			2181	04/28/2016	N/A
Common Stock	02/07/2017	Restricted Stock Units	Issuer			1566	02/07/2017	N/A
Common Stock	02/07/2018	Restricted Stock Units	Issuer			972	02/07/2018	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	05/06/2026
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)