MPWR holder Maurice Sciammas plans 15000-share sale

Rhea-AI Filing Summary

MPWR shareholder Maurice Sciammas filed a notice to sell 15000 shares of common stock through Morgan Stanley Smith Barney LLC Executive Financial Services, referencing a valuation of 20245944.00 and 49130000 shares outstanding, with an approximate sale date of 07/15/2026 on NASDAQ.

The notice also lists prior sales over the preceding three months, including 12000 shares on 05/15/2026 for 18736864.80, and smaller transactions of 380 shares on 05/05/2026 and 30-share lots on 05/04/2026, 06/01/2026, and 07/01/2026.

Key Figures

Planned sale shares: 15000 Referenced valuation: 20245944.00 Shares outstanding: 49130000 +3 more

6 metrics

Planned sale shares 15000 Common shares covered by the planned sale notice

Referenced valuation 20245944.00 Valuation associated with the planned sale of 15000 shares

Shares outstanding 49130000 Total shares outstanding cited alongside the planned sale

Approximate sale date 07/15/2026 Approximate date of the proposed sale on NASDAQ

Largest recent sale shares 12000 Shares sold on 05/15/2026 by Maurice Sciammas

Largest recent sale amount 18736864.80 Amount associated with the 12000-share sale on 05/15/2026

Key Terms

Securities To Be Sold, Securities Sold During The Past 3 Months, Restricted Stock, Executive Financial Services

4 terms

Securities To Be Sold regulatory

"144: Securities To Be Sold"

Securities Sold During The Past 3 Months regulatory

"144: Securities Sold During The Past 3 Months"

Restricted Stock financial

"Common | 10/25/2025 | Restricted Stock | ISSUER"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

Executive Financial Services financial

"Morgan Stanley Smith Barney LLC Executive Financial Services"

FAQ

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

What MPWR stock sale is Maurice Sciammas planning?

Maurice Sciammas plans to sell 15000 shares of MPWR common stock through Morgan Stanley Smith Barney LLC Executive Financial Services, referencing a valuation of 20245944.00 and targeting an approximate sale date of 07/15/2026 on NASDAQ.

How many MPWR shares are cited as outstanding in this notice?

The notice cites 49130000 shares as outstanding. This figure appears alongside the planned sale of 15000 common shares and provides context on the overall share base relative to the shares covered by the filing.

Which broker will handle the planned MPWR share sale?

The planned sale of 15000 MPWR common shares will be handled by Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, 8th Floor, New York, NY 10004, according to the information provided in the notice.

What recent MPWR share sales by Maurice Sciammas are disclosed?

Recent disclosed sales include 12000 shares on 05/15/2026 for 18736864.80, plus smaller trades of 380 shares on 05/05/2026 and 30-share transactions on 05/04/2026, 06/01/2026, and 07/01/2026, all involving MPWR common stock.

What type of MPWR security is involved in the planned sale?

The planned transaction involves MPWR common stock. A related section notes “Restricted Stock” acquired on 10/25/2025 from the issuer, with an indicated amount of 15000, which aligns with the number of common shares covered by the sale notice.

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

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Accepted by SEC EDGAR 07/15/2026 - 05:03 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	0001360833
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	MAURICE SCIAMMAS
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	Officer

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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	15000	20245944.00	49130000	07/15/2026	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	10/25/2025	Restricted Stock	ISSUER			15000	10/25/2025	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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
MAURICE SCIAMMAS 1555 Palm Beach Lakes Blvd. West Palm Beach FL 33401	Common	07/01/2026	30	40548.30
MAURICE SCIAMMAS 1555 Palm Beach Lakes Blvd. West Palm Beach FL 33401	Common	06/01/2026	30	46018.50
MAURICE SCIAMMAS 1555 Palm Beach Lakes Blvd. West Palm Beach FL 33401	Common	05/15/2026	12000	18736864.80
MAURICE SCIAMMAS 1555 Palm Beach Lakes Blvd. West Palm Beach FL 33401	Common	05/05/2026	380	601847.80
MAURICE SCIAMMAS 1555 Palm Beach Lakes Blvd. West Palm Beach FL 33401	Common	05/04/2026	30	47661.90

144: Remarks and Signature

Remarks
Date of Notice	07/15/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	11/24/2025
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/ Maurice Sciammas
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)