Jeff Zhou files Rule 144 notice to sell 500 shares

Jeff Zhou reported proposed sales of 500 shares of Common Stock under Rule 144 and disclosed recent dispositions.

Rhea-AI Filing Summary

Jeff Zhou reported proposed sales of 500 shares of Common Stock under Rule 144 and disclosed recent dispositions. The filing lists 500 restricted shares (originally dated 02/07/2013) as the securities to be sold and shows 1,014 shares sold on 05/05/2026 for $1,609,285.29.

Insights

Securities Compliance Counsel

Rule 144 sale notice and recent dispositions recorded; disclosure is administrative.

The filing lists 500 restricted shares dated 02/07/2013 as the securities to be sold and records prior sales of 1,014 shares on 05/05/2026 for $1,609,285.29. This form notifies the market of a planned resale under the securities resale rules.

Timing and methods of the proposed 500-share sale are not detailed in the excerpt; subsequent filings or broker reports would state execution details or confirm completion.

Key Figures

Proposed shares to sell: 500 shares Shares sold in past 3 months: 1,014 shares Proceeds from recent sale: $1,609,285.29 +2 more

5 metrics

Proposed shares to sell 500 shares listed as securities to be sold; restricted stock dated 02/07/2013

Shares sold in past 3 months 1,014 shares sold on 05/05/2026 as disclosed in the filing

Proceeds from recent sale $1,609,285.29 aggregate amount tied to the 1,014-share sale on 05/05/2026

Original restriction date 02/07/2013 date shown for the restricted shares proposed for sale

Listing venue NASDAQ market indicated on the filing cover data

Key Terms

Rule 144, restricted stock, Form 144

3 terms

Rule 144 regulatory

"Securities To Be Sold section indicating restricted stock resale under Rule 144"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

restricted stock financial

"Securities To Be Sold lists the instrument as Restricted Stock dated 02/07/2013"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

Form 144 regulatory

"Header and context identifying this disclosure as a Form 144 sale notice"

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.

FAQ

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

What does Jeff Zhou's Form 144 for MPWR disclose?

The form discloses a proposed sale of 500 shares of Common Stock and records prior dispositions of 1,014 shares on 05/05/2026 totaling $1,609,285.29. It lists the 500 shares as restricted stock dated 02/07/2013.

How many shares were sold recently by the reporting person on this Form 144?

The filing shows 1,014 shares were sold on 05/05/2026 for $1,609,285.29. This figure appears under 'Securities Sold During The Past 3 Months.'

What class of securities is Jeff Zhou offering under Rule 144?

The excerpt shows the securities are Common stock, identified as restricted stock with an original date of 02/07/2013. The number listed for sale is 500 shares.

Who is the broker or placement agent listed on the Form 144?

The filing lists Morgan Stanley Smith Barney LLC at 1 New York Plaza and indicates the transaction market as NASDAQ. No further execution method is provided in the excerpt.

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

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Accepted by SEC EDGAR 05/06/2026 - 04:47 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	0001480772
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	JEFF ZHOU
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	Director

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	500	825000.00	49130000	05/06/2026	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	02/07/2013	Restricted Stock	Issuer			500	02/07/2013	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
JEFF ZHOU 1555 Palm Beach Lakes Blvd. West Palm Beach FL 33401	Common	05/05/2026	1014	1609285.29

144: Remarks and Signature

Remarks
Date of Notice	05/06/2026
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/ Jeff Zhou
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)