Form 144: 20,339 POWI Shares Listed for Sale

Morgan Stanley Smith Barney LLC submitted a Form 144 reporting Common stock sale activity and planned sales.

Accepted by SEC EDGAR 05/13/2026 - 05:06 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Morgan Stanley Smith Barney LLC submitted a Form 144 reporting Common stock sale activity and planned sales. The filing lists 20,339 shares and monetary entries of $1,467,053.11 and 55,719,984 with an 05/13/2026 date. The schedule itemizes multiple vested restricted stock and Employee Stock Purchase Plan entries as the securities to be sold. The excerpt also shows recent sales by Clifford J. Walker of 9,361 shares and 300 shares on 05/12/2026, with amounts $667,036.78 and $21,375.00.

Key Figures

Listed shares: 20,339 shares Monetary entry 1: $1,467,053.11 Monetary entry 2: 55,719,984 +5 more

8 metrics

Listed shares 20,339 shares Form 144 header line

Monetary entry 1 $1,467,053.11 Form 144 header line

Monetary entry 2 55,719,984 Form 144 header line (numeric entry as shown)

Filing date 05/13/2026 Form 144 header line

Recent sale (Walker) 9,361 shares Securities sold during past 3 months on 05/12/2026

Proceeds (Walker sale) $667,036.78 Proceeds reported for 9,361-share sale on 05/12/2026

Recent sale 2 (Walker) 300 shares Securities sold during past 3 months on 05/12/2026

Proceeds (300-share sale) $21,375.00 Proceeds reported for 300-share sale on 05/12/2026

Key Terms

Form 144, Restricted stock vesting under a registered plan, Employee Stock Purchase Plan

3 terms

Form 144 regulatory

"144: Filer Information"

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.

Restricted stock vesting under a registered plan financial

"Restricted stock vesting under a registered plan | Issuer"

Employee Stock Purchase Plan financial

"Shares Purchased through Employee Stock Purchase Plan | Issuer"

An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.

FAQ

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

What does the Form 144 for POWI show?

The Form 144 lists 20,339 Common shares and monetary lines $1,467,053.11 and 55,719,984 with a filing date of 05/13/2026. It itemizes vesting and ESPP-originated shares among the securities to be sold.

Who sold shares in the past three months per this excerpt?

The excerpt shows Clifford J. Walker sold 9,361 shares and 300 shares on 05/12/2026, with reported proceeds of $667,036.78 and $21,375.00 respectively.

What types of shares are listed as to be sold?

The schedule lists shares from restricted stock vesting under a registered plan and shares purchased through an Employee Stock Purchase Plan, with multiple vesting dates shown in 2022–2025.

Does the filing specify how sales will be executed?

The provided excerpt lists the securities and dates but does not describe methods of sale or underwriters. Execution details and distribution methods are not included in the visible content.

What dates anchor the reported transactions?

Key dates in the excerpt include the filing date 05/13/2026 and transaction dates 05/12/2026 for the reported sales; multiple vesting dates from 04/01/2022 through 01/29/2025 appear for the securities to be sold.

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

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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	0001182413
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	POWER INTEGRATIONS, INC.
SEC File Number	000-23441
Address of Issuer	5245 Hellyer Avenue San Jose CALIFORNIA 95138-1002
Phone	(408) 414-9200
Name of Person for Whose Account the Securities are To Be Sold	CLIFFORD J WALKER
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	20339	1467053.11	55719984	05/13/2026	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	02/07/2023	Restricted stock vesting under a registered plan	Issuer			1445	02/07/2023	Cash
Common	02/12/2023	Restricted stock vesting under a registered plan	Issuer			2411	02/12/2023	Cash
Common	04/01/2023	Restricted stock vesting under a registered plan	Issuer			1455	04/01/2023	Cash
Common	07/31/2023	Shares Purchased through Employee Stock Purchase Plan	Issuer			140	07/31/2023	Cash
Common	01/24/2024	Restricted stock vesting under a registered plan	Issuer			641	01/24/2024	Cash
Common	01/27/2024	Restricted stock vesting under a registered plan	Issuer			693	01/24/2024	Cash
Common	01/29/2024	Restricted stock vesting under a registered plan	Issuer			241	01/29/2024	Cash
Common	01/30/2024	Restricted stock vesting under a registered plan	Issuer			466	01/30/2024	Cash
Common	01/31/2024	Shares Purchased through Employee Stock Purchase Plan	Issuer			132	01/31/2024	Cash
Common	02/01/2024	Restricted stock vesting under a registered plan	Issuer			478	02/01/2024	Cash
Common	02/03/2024	Restricted stock vesting under a registered plan	Issuer			620	02/03/2024	Cash
Common	02/04/2024	Restricted stock vesting under a registered plan	Issuer			420	02/04/2024	Cash
Common	02/09/2024	Restricted stock vesting under a registered plan	Issuer			1381	02/09/2024	Cash
Common	02/12/2024	Restricted stock vesting under a registered plan	Issuer			1021	02/12/2024	Cash
Common	04/01/2024	Restricted stock vesting under a registered plan	Issuer			1904	04/01/2024	Cash
Common	07/31/2024	Shares Purchased through Employee Stock Purchase Plan	Issuer			165	07/31/2024	Cash
Common	01/29/2025	Restricted stock vesting under a registered plan	Issuer			1204	01/29/2025	Cash
Common	01/31/2025	Shares Purchased through Employee Stock Purchase Plan	Issuer			183	01/31/2025	Cash
Common	04/01/2022	Restricted stock vesting under a registered plan	Issuer			1285	04/01/2022	Cash
Common	07/29/2022	Shares Purchased through Employee Stock Purchase Plan	Issuer			156	07/29/2022	Cash
Common	01/31/2023	Shares Purchased through Employee Stock Purchase Plan	Issuer			151	01/31/2023	Cash
Common	02/01/2023	Restricted stock vesting under a registered plan	Issuer			955	02/01/2023	Cash
Common	02/02/2023	Restricted stock vesting under a registered plan	Issuer			1183	02/02/2023	Cash
Common	02/04/2023	Restricted stock vesting under a registered plan	Issuer			1503	02/04/2023	Cash
Common	02/07/2023	Restricted stock vesting under a registered plan	Issuer			106	02/07/2023	Cash

* 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
CLIFFORD J WALKER 5245 Hellyer Avenue San Jose CA 95138-1002	Common	05/12/2026	9361	667036.78
Clifford Walker 5245 Hellyer Avenue San Jose CA 95138-1002	common	05/12/2026	300	21375.00

144: Remarks and Signature

Remarks
Date of Notice	05/13/2026
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/ Clifford Walker
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)