Insider proposes sale of 3,000 shares (NASDAQ: MPWR)

Rhea-AI Filing Summary

Theodore Bernhard Blegen filed a Form 144 reporting a proposed sale of 3,000 common shares. The filing also lists recent dispositions by Blegen during the prior three months: 3,000 shares on 04/01/2026, 3,000 shares on 03/02/2026, 21,725 shares on 02/06/2026, and 3,000 shares on 02/02/2026, each with the dollar amounts shown in the filing.

Insights

Securities Compliance Counsel

Form 144 notifies market of a proposed insider sale and lists recent transactions.

Form 144 is the seller’s notice under Section 5 of the Securities Act for certain transfers by affiliates; it lists the proposed sale of 3,000 common shares and several recent dispositions with reported dollar values. The filing indicates brokerage details and an exchange label.

Practical implications are procedural: these notices permit an affiliate to sell subject to Rule 144 conditions. Timing, final sale execution, and compliance with volume/holding-period rules are determined outside this notice and are not specified in the provided excerpt.

Key Figures

Proposed sale: 3,000 shares Sale on 04/01/2026: 3,000 shares Proceeds listed (04/01/2026): $3,343,033.50 +3 more

6 metrics

Proposed sale 3,000 shares Securities To Be Sold section

Sale on 04/01/2026 3,000 shares Securities Sold During The Past 3 Months

Proceeds listed (04/01/2026) $3,343,033.50 Dollar amount paired with 04/01/2026 sale

Sale on 02/06/2026 21,725 shares Securities Sold During The Past 3 Months

Proceeds listed (02/06/2026) $25,443,531.38 Dollar amount paired with 02/06/2026 sale

Brokerage firm listed Morgan Stanley Smith Barney LLC Filer Information / Securities To Be Sold

Key Terms

Form 144, Performance Shares, Issuer

3 terms

Form 144 regulatory

"Securities To Be Sold section lists proposed sale and recent dispositions"

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

"Line showing "Performance Shares" with an effective date 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.

Issuer regulatory

"Securities To Be Sold section labels transfer type as "ISSUER""

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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	3000	4638874.80	49118000	05/01/2026	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	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
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

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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 Theodore Blegen's Form 144 mean for MPWR shareholders?

It notifies the market of a proposed insider sale of 3,000 common shares. The form lists prior monthly dispositions totaling multiple share sales and dollar amounts; it does not itself report an executed market sale or change company operations.

How many shares is the filing showing to be sold in the proposed transaction?

The filing shows a proposed sale of 3,000 common shares. That quantity is listed under the "Securities To Be Sold" section as the shares the reporting person intends to sell.

What recent insider sales by Theodore Blegen are included in the Form 144?

The filing lists recent dispositions: 3,000 shares on 04/01/2026, 3,000 on 03/02/2026, 21,725 on 02/06/2026, and 3,000 on 02/02/2026, each accompanied by the dollar amounts shown in the excerpt.

Does Form 144 guarantee the shares will be sold immediately?

No; Form 144 is a notice of a proposed sale and does not guarantee execution. Actual sale timing, method, and compliance with Rule 144 conditions are determined separately and are not specified in the excerpt.

Who is the broker or intermediary named in the filing?

The broker listed is Morgan Stanley Smith Barney LLC at an address shown in the filing. The excerpt includes brokerage contact details alongside the proposed sale quantity.