Saria Tseng sells shares; MPWR (NASDAQ: MPWR) Form 144 lists four trades

Rhea-AI Filing Summary

Insider sales reported under Form 144 by Saria Tseng. The filing lists multiple dispositions of Common Stock with specific sale dates and share counts: 25,674 shares on 03/30/2026, 1,400 shares on 04/01/2026, 7,636 shares on 04/06/2026, and 8,964 shares on 04/08/2026. Each sale row includes a cash amount received shown in the excerpt. The filing also lists holdings described as Performance Shares with grant dates of 01/01/2024 and per-row counts visible in the excerpt.

Insights

Securities Compliance Analyst

Form 144 lists specific insider dispositions by date and share count.

The excerpt shows multiple open-market or brokered dispositions by Saria Tseng with dated sales and per‑trade proceeds. Form 144 is a notice of proposed sale under resale limitations; it reports intended transactions but does not itself execute them.

Timing and execution details beyond the listed dates are not included here; subsequent filings or trade confirmations would show final execution. Cash‑flow treatment and whether proceeds were paid to the reporting person are not specified in the excerpt.

Key Figures

Sale on 03/30/2026: 25,674 shares Proceeds for 03/30/2026 sale: $25,943,648.15 Sale on 04/01/2026: 1,400 shares +5 more

8 metrics

Sale on 03/30/2026 25,674 shares disposition reported on 03/30/2026

Proceeds for 03/30/2026 sale $25,943,648.15 cash amount paired with 25,674‑share row in excerpt

Sale on 04/01/2026 1,400 shares disposition reported on 04/01/2026

Proceeds for 04/01/2026 sale $1,586,924.78 cash amount paired with 1,400‑share row in excerpt

Sale on 04/06/2026 7,636 shares disposition reported on 04/06/2026

Proceeds for 04/06/2026 sale $8,918,428.78 cash amount paired with 7,636‑share row in excerpt

Sale on 04/08/2026 8,964 shares disposition reported on 04/08/2026

Proceeds for 04/08/2026 sale $11,699,941.28 cash amount paired with 8,964‑share row in excerpt

Key Terms

Performance Shares, Form 144, Morgan Stanley Smith Barney LLC

3 terms

Performance Shares financial

"Common | 01/01/2024 | Performance Shares | Issuer | | | 1420"

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.

Form 144 regulatory

"CONTENT METADATA: "form_type": "144""

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.

Morgan Stanley Smith Barney LLC other

"Common | Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza"

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	5000	7932150.00	49130000	05/22/2026	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			1420	01/01/2024	Not Applicable
Common	01/01/2024	Performance Shares	Issuer			1790	01/01/2024	Not Applicable
Common	01/01/2024	Performance Shares	Issuer			1790	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
SARIA TSENG 1555 Palm Beach Lakes Blvd. West Palm Beach FL 33401	Common	04/08/2026	8964	11699941.28
SARIA TSENG 1555 Palm Beach Lakes Blvd. West Palm Beach FL 33401	Common	04/06/2026	7636	8918428.78
SARIA TSENG 1555 Palm Beach Lakes Blvd. West Palm Beach FL 33401	Common	04/01/2026	1400	1586924.78
SARIA TSENG 1555 Palm Beach Lakes Blvd. West Palm Beach FL 33401	Common	03/30/2026	25674	25943648.15

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 sales does MPWR Form 144 show for Saria Tseng?

The filing lists four sales: 25,674 shares (03/30/2026), 1,400 shares (04/01/2026), 7,636 shares (04/06/2026), and 8,964 shares (04/08/2026). Each row in the excerpt includes a cash amount received alongside the share count.

Do the entries show proceeds received from the sales?

Yes. Each sale row in the excerpt pairs a share count with a dollar amount, for example $25,943,648.15 appears alongside the 25,674‑share line in the excerpt, indicating reported proceeds for that disposition.

Are the Performance Shares listed being sold in this filing?

The excerpt lists Performance Shares granted on 01/01/2024 with per‑row counts (e.g., 1,420; 1,790). The filing shows these items in the securities section but does not explicitly state each grant is being sold in the same rows that report the trades.

Does Form 144 confirm final execution of the trades?

No. Form 144 is a notice of proposed sale under resale rules; the excerpt reports intended dispositions with dates and amounts but does not itself serve as trade confirmations or final settlement records.

Who is the broker-dealer listed in the filing excerpt?

Morgan Stanley Smith Barney LLC is named with an address in New York. The excerpt includes a broker line showing that firm and an associated numeric entry but does not describe specific broker instructions beyond identification.