Insider files Form 144 reporting multiple share sales

Theodore Bernhard Blegen reported multiple sales of Common Stock in a Form 144 notice.

Rhea-AI Filing Summary

Theodore Bernhard Blegen reported multiple sales of Common Stock in a Form 144 notice. The excerpt lists four transactions dated 01/02/2026, 02/02/2026, 02/06/2026, and 03/02/2026 with share amounts of 3,000, 3,000, 21,725, and 3,000 respectively and dollar amounts shown for each sale.

Key Figures

Sale on 03/02/2026: 3,000 shares Proceeds shown for 03/02/2026: $3,349,516.50 Sale on 02/06/2026: 21,725 shares +5 more

8 metrics

Sale on 03/02/2026 3,000 shares 03/02/2026 recorded sale by Theodore B. Blegen

Proceeds shown for 03/02/2026 $3,349,516.50 Amount paired with the 3,000-share entry dated 03/02/2026

Sale on 02/06/2026 21,725 shares 02/06/2026 recorded sale by Theodore B. Blegen

Proceeds shown for 02/06/2026 $25,443,531.38 Amount paired with the 21,725-share entry dated 02/06/2026

Sale on 02/02/2026 3,000 shares 02/02/2026 recorded sale by Theodore B. Blegen

Proceeds shown for 02/02/2026 $3,389,269.80 Amount paired with the 3,000-share entry dated 02/02/2026

Sale on 01/02/2026 3,000 shares 01/02/2026 recorded sale by Theodore B. Blegen

Proceeds shown for 01/02/2026 $2,821,403.10 Amount paired with the 3,000-share entry dated 01/02/2026

Key Terms

Form 144, Performance Shares, Issuer, Morgan Stanley Smith Barney LLC

4 terms

Form 144 regulatory

"Filer Information | 144: Filer Information"

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 | 01/01/2024 | Performance Shares"

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.

Issuer financial

"Performance Shares | ISSUER | 3000"

Morgan Stanley Smith Barney LLC market

"Common | Morgan Stanley Smith Barney LLC Executive Financial Services"

FAQ

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

What did the Form 144 for MPWR disclose?

It disclosed multiple planned sales by Theodore B. Blegen. The filing lists four transactions on 01/02/2026, 02/02/2026, 02/06/2026, and 03/02/2026 with share counts of 3,000; 3,000; 21,725; and 3,000 respectively.

How many shares did Theodore B. Blegen sell per the filing?

Individual sales listed are 3,000; 3,000; 21,725; and 3,000 shares. Each sale entry in the excerpt pairs a share count with a dollar amount for that transaction.

What dollar amounts are shown for the reported sales in the Form 144?

The filing shows dollar amounts tied to each sale entry. Examples include $2,821,403.10, $3,389,269.80, $25,443,531.38, and $3,349,516.50 corresponding to the listed share counts.

Does the Form 144 indicate who the broker or issuer is for these sales?

Yes—one broker is named. The excerpt lists Morgan Stanley Smith Barney LLC, 1 New York Plaza as a securities intermediary associated with the transactions in the filing.

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

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Accepted by SEC EDGAR 04/01/2026 - 04:08 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	0001415033
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	THEODORE BERNHARD BLEGEN
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	3000	3343033.50	49118000	04/01/2026	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	01/01/2024	Performance Shares	ISSUER			3000	01/01/2024	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
THEODORE BERNHARD BLEGEN 1555 Palm Beach Lakes Blvd. West Palm Beach FL 33401	Common	03/02/2026	3000	3349516.50
THEODORE BERNHARD BLEGEN 1555 Palm Beach Lakes Blvd. West Palm Beach FL 33401	Common	02/06/2026	21725	25443531.38
THEODORE BERNHARD BLEGEN 1555 Palm Beach Lakes Blvd. West Palm Beach FL 33401	Common	02/02/2026	3000	3389269.80
THEODORE BERNHARD BLEGEN 1555 Palm Beach Lakes Blvd. West Palm Beach FL 33401	Common	01/02/2026	3000	2821403.10

144: Remarks and Signature

Remarks
Date of Notice	04/01/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	02/26/2025
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/ Theodore Bernhard Blegen
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)