Robert Dean plans Monolithic Power stock sale

Robert Dean filed a notice of proposed sale of Monolithic Power Systems (MPWR) common stock.

Accepted by SEC EDGAR 08/05/2026 - 04:16 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Robert Dean filed a notice of proposed sale of Monolithic Power Systems (MPWR) common stock. The filing lists 105 shares of common stock to be sold through Morgan Stanley Smith Barney LLC on or after August 5, 2026 on NASDAQ. It also reports sales of MPWR common stock during the prior three months, including 22 shares on May 26, 2026 for $35,882.23 and 4 shares on May 18, 2026 for $6,253.12.

Key Figures

Shares to be sold: 105 shares Sale on May 26, 2026: 22 shares for $35,882.23 Sale on May 18, 2026: 4 shares for $6,253.12 +1 more

4 metrics

Shares to be sold 105 shares Planned sale of MPWR common stock on or after August 5, 2026

Sale on May 26, 2026 22 shares for $35,882.23 MPWR common stock sold during the past 3 months

Sale on May 18, 2026 4 shares for $6,253.12 MPWR common stock sold during the past 3 months

Proposed sale date 08/05/2026 Date for proposed sale of 105 MPWR common shares on NASDAQ

Key Terms

Form 144, Performance Shares, common stock

3 terms

Form 144 regulatory

"filed a notice of proposed sale of Monolithic Power Systems stock on Form 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.

Performance Shares financial

"Common | 02/22/2026 | Performance Shares | Issuer"

Performance shares are a type of company stock given to executives or employees that only become theirs if the company meets specific goals, like hitting certain profits or growth targets. They motivate leaders to work toward the company’s success, because their additional shares depend on achieving these results.

common stock financial

"105 shares of common stock to be sold through Morgan Stanley Smith Barney LLC"

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 the MPWR Form 144 filing by Robert Dean disclose?

The filing discloses that Robert Dean plans to sell 105 shares of Monolithic Power Systems common stock, with the proposed sale to occur on or after August 5, 2026 through Morgan Stanley Smith Barney LLC on NASDAQ.

How many MPWR shares is Robert Dean planning to sell under this notice?

Robert Dean is planning to sell 105 shares of Monolithic Power Systems common stock. This amount is listed as the securities to be sold through Morgan Stanley Smith Barney LLC on NASDAQ with a proposed sale date of August 5, 2026.

What prior MPWR stock sales are reported in the Form 144 filing?

The filing reports two prior sales of MPWR common stock in the past three months: 22 shares sold on May 26, 2026 for $35,882.23 and 4 shares sold on May 18, 2026 for $6,253.12.

On which market will the proposed MPWR share sale take place?

The proposed sale of 105 MPWR shares is listed to occur on NASDAQ. The Form 144 specifies Morgan Stanley Smith Barney LLC as the broker handling the transaction, with a proposed sale date of August 5, 2026.

Who is the broker listed for Robert Dean’s planned MPWR stock sale?

The broker listed is Morgan Stanley Smith Barney LLC, Executive Financial Services, located at 1 New York Plaza, 8th Floor, New York, NY 10004. This firm is named in connection with the planned sale of 105 MPWR common shares.

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	0001445300
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	ROBERT DEAN
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	105	141147.83	49130000	08/05/2026	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	02/22/2026	Performance Shares	Issuer			105	02/22/2026	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
ROBERT DEAN 1555 Palm Beach Lakes Blvd. West Palm Beach FL 33401	Common	05/26/2026	22	35882.23
ROBERT DEAN 1555 Palm Beach Lakes Blvd. West Palm Beach FL 33401	Common	05/18/2026	4	6253.12

144: Remarks and Signature

Remarks
Date of Notice	08/05/2026
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/ Robert W Dean II
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)