Insider tied to MPWR (NASDAQ: MPWR) files to sell 1,286 shares

Rhea-AI Filing Summary

An insider has filed a Rule 144 notice to sell 1,286 shares of common stock through Morgan Stanley Smith Barney LLC on NASDAQ, with an indicated aggregate market value of 1505526.00 and an approximate sale date of 02/06/2026.

The 1,286 shares were acquired on 02/03/2026 as performance-based restricted stock units from the issuer. The filing also shows that Deming Xiao sold 21,590 common shares on 02/04/2026 for gross proceeds of 25285344.00 during the past three months.

Insights

Insider transactions analyst

Rule 144 filing shows significant insider share sales but no business update.

The notice covers a proposed sale of 1,286 common shares with an aggregate market value of 1505526.00, to be sold on or about 02/06/2026 on NASDAQ via Morgan Stanley Smith Barney LLC. These shares came from performance-based restricted stock units acquired on 02/03/2026, indicating equity compensation vesting.

The filing also reports that Deming Xiao sold 21,590 common shares on 02/04/2026, generating gross proceeds of 25285344.00 over the last three months. The signer represents they are unaware of undisclosed material adverse information about the issuer’s operations, which is a standard Rule 144 attestation rather than new operational data.

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 NY 10004	1286	1505526.00	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			1286	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
Deming Xiao 1555 PALM BEACH LAKES BLVD. WEST PALM BEACH FL 33401	Common Stock	02/04/2026	21590	25285344.00

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 MPWR Rule 144 filing disclose about planned share sales?

The filing discloses a planned sale of 1,286 shares of common stock on NASDAQ through Morgan Stanley Smith Barney LLC, with an aggregate market value of 1505526.00. The approximate sale date indicated is 02/06/2026 under Rule 144.

How were the 1,286 MPWR shares in the Rule 144 notice acquired?

The 1,286 shares were acquired on 02/03/2026 as performance-based restricted stock units from the issuer. The same date is listed as the payment date, and the nature of payment is described as N/A, reflecting equity-based compensation rather than a cash purchase.

What prior MPWR share sales are reported in the Rule 144 filing?

The document reports that Deming Xiao sold 21,590 shares of common stock on 02/04/2026. These sales generated gross proceeds of 25285344.00 over the past three months, as required disclosure for aggregated sales associated with the filer.

Which broker and exchange are involved in the MPWR Rule 144 sale?

The planned sale will be executed through Morgan Stanley Smith Barney LLC Executive Financial Services, located in New York. The shares are to be sold on the NASDAQ exchange, as specified in the securities information section of the notice.

What representation does the insider make in the MPWR Rule 144 notice?

The person for whose account the securities are to be sold represents that they do not know any material adverse information about the issuer’s current or prospective operations that has not been publicly disclosed, a standard Rule 144 requirement.

Does the MPWR Rule 144 filing mention a Rule 10b5-1 trading plan?

The form explains that if the seller adopted a written trading plan or gave instructions to satisfy Rule 10b5-1, signing the notice and indicating that adoption date would extend their representation to that date. The excerpt does not show a specific plan date.