Theodore Blegen files Form 144 to sell common shares

Theodore Bernhard Blegen filed a notice under Form 144 reporting proposed sales of Common Stock through Morgan Stanley Smith Barney.

Rhea-AI Filing Summary

Theodore Bernhard Blegen filed a notice under Form 144 reporting proposed sales of Common Stock through Morgan Stanley Smith Barney. The filing lists prior sales of 3,000 shares on 05/01/2026 ($4,638,874.80), 3,000 shares on 04/01/2026 ($3,343,033.50), and 3,000 shares on 03/02/2026 ($3,349,516.50).

Insights

Securities Counsel

Routine Form 144 notice of proposed insider sales, with recent executed sales shown.

The filing lists a broker-dealer (Morgan Stanley Smith Barney LLC) and identifies the securities as Performance Shares of Common Stock. It documents three recent sales of 3,000 shares each on listed dates with corresponding dollar amounts.

Regulatory treatment is procedural: the notice records proposed sales and recent dispositions. Timing and method of any future sales are governed by securities law and the transfer agent/broker processes; cash-flow treatment is not specified in the excerpt.

Key Figures

Sale on 05/01/2026: 3,000 shares Sale on 04/01/2026: 3,000 shares Sale on 03/02/2026: 3,000 shares +2 more

5 metrics

Sale on 05/01/2026 3,000 shares Reported sale with <money>$4,638,874.80</money>

Sale on 04/01/2026 3,000 shares Reported sale with <money>$3,343,033.50</money>

Sale on 03/02/2026 3,000 shares Reported sale with <money>$3,349,516.50</money>

Broker-dealer Morgan Stanley Smith Barney LLC Listed in securities information header

Form type Form 144 notice Filed to report proposed sale of restricted/affiliated securities

Key Terms

Form 144, Performance Shares, Broker-dealer

3 terms

Form 144 regulatory

"filed a notice under Form 144 reporting proposed sales"

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

"Performance Shares | ISSUER | 01/01/2024"

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.

Broker-dealer market

"Morgan Stanley Smith Barney LLC Executive Financial Services"

A broker-dealer is a licensed firm or individual that both executes trades on behalf of clients (acting as a broker) and buys or sells securities for its own account (acting as a dealer). Investors care because broker-dealers provide the plumbing of markets — they place orders, hold or move cash and securities, offer research or advice, and their stability and fees directly affect trade execution, costs, and the safety of client funds; think of them as a combined travel agent and taxi for your investments.

FAQ

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

What does Theodore Blegen's Form 144 filing for MPWR show?

It shows a Form 144 notice for proposed sales of Common Stock via Morgan Stanley Smith Barney. The filing lists sales of 3,000 shares on 05/01/2026, 04/01/2026, and 03/02/2026 with dollar amounts.

How many shares did Theodore Blegen sell recently according to the filing?

The filing lists three recent sales of 3,000 shares each. Those transactions occurred on 03/02/2026, 04/01/2026, and 05/01/2026 with the reported dollar amounts shown in the excerpt.

Which broker handled the reported transactions in the Form 144?

The broker-dealer named is Morgan Stanley Smith Barney LLC, located at 1 New York Plaza, 8th Floor. The filing lists that broker in the header of the securities information section.

Do the listed amounts indicate proceeds received by the seller?

The excerpt pairs each 3,000-share sale with a dollar figure (for example, $4,638,874.80 on 05/01/2026). The filing shows the sale amounts but does not specify how proceeds were used or paid in the provided excerpt.

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

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Accepted by SEC EDGAR 06/01/2026 - 04:11 PM 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	3001	4625867.74	49130000	06/01/2026	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			3001	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	05/01/2026	3000	4638874.80
THEODORE BERNHARD BLEGEN 1555 Palm Beach Lakes Blvd. West Palm Beach FL 33401	Common	04/01/2026	3000	3343033.50
THEODORE BERNHARD BLEGEN 1555 Palm Beach Lakes Blvd. West Palm Beach FL 33401	Common	03/02/2026	3000	3349516.50

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of performance shares during the period of 01/01/2024 through 08/07/2024.
Date of Notice	06/01/2026
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)