MPWR (NASDAQ: MPWR) holder files to sell 995 common shares

Rhea-AI Filing Summary

Monolithic Power Systems (MPWR) shareholder Bernie Blegen filed a Form 144 notice to sell 995 shares of common stock through Morgan Stanley Smith Barney LLC on NASDAQ around 02/06/2026, with an aggregate market value of 1165304.00. The issuer reported 48710953 shares outstanding.

During the prior three months, the same seller reported additional common stock sales: 3000 shares on 12/01/2025 for gross proceeds of 2724630.00, 3000 shares on 01/02/2026 for 2821410.00, 3000 shares on 02/02/2026 for 3389280.00, and 20730 shares on 02/04/2026 for 24278167.00.

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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York FL 10004	995	1165304.00	48710953	02/06/2026	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	02/03/2026	Performance-based restricted stock units	Issuer			995	02/03/2026	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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
BERNIE BLEGEN 1555 PALM BEACH LAKES BLVD. WEST PALM BEACH FL 33401	Common Stock	12/01/2025	3000	2724630.00
BERNIE BLEGEN 1555 PALM BEACH LAKES BLVD. WEST PALM BEACH FL 33401	Common Stock	01/02/2026	3000	2821410.00
BERNIE BLEGEN 1555 PALM BEACH LAKES BLVD. WEST PALM BEACH FL 33401	Common Stock	02/02/2026	3000	3389280.00
BERNIE BLEGEN 1555 PALM BEACH LAKES BLVD., WEST PALM BEACH, FL 33401	Common Stock	02/04/2026	20730	24278167.00

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 Form 144 filing for MPWR disclose?

The Form 144 discloses a planned sale of MPWR shares by a shareholder. Bernie Blegen filed to sell 995 shares of Monolithic Power Systems common stock, with an aggregate market value of 1165304.00, through Morgan Stanley Smith Barney LLC on NASDAQ around 02/06/2026.

How many MPWR shares are covered by this Form 144 notice?

The notice covers 995 shares of MPWR common stock. These shares are planned to be sold through Morgan Stanley Smith Barney LLC on NASDAQ, with an aggregate market value of 1165304.00 at the time of the filing, under Rule 144 resale provisions.

What recent MPWR share sales has the same holder reported?

The shareholder reported several MPWR sales over the past three months. Transactions include 3000 shares on 12/01/2025, 3000 on 01/02/2026, 3000 on 02/02/2026, and 20730 on 02/04/2026, with gross proceeds ranging from 2724630.00 to 24278167.00.

How many MPWR shares were outstanding when this Form 144 was filed?

The issuer reported 48710953 MPWR common shares outstanding. This figure provides context for the planned sale of 995 shares under the Form 144 notice, indicating the sale size relative to the company’s total outstanding common stock.

How were the MPWR shares to be sold under this Form 144 acquired?

The 995 MPWR shares come from performance-based restricted stock units. These common shares were acquired on 02/03/2026 from the issuer via performance-based restricted stock units, with the same date listed for payment and the nature of payment noted as N/A.

Which broker is handling the planned MPWR share sale?

Morgan Stanley Smith Barney LLC is handling the transaction. The notice lists Morgan Stanley Smith Barney LLC Executive Financial Services, at 1 New York Plaza, 8th Floor, New York, FL 10004, as the broker for selling 995 MPWR common shares on NASDAQ.