Power Integrations director granted 2,491 RSUs

Arienzo Wendy reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Arienzo Wendy reported acquisition or exercise transactions in this Form 4 filing.

POWER INTEGRATIONS INC director Wendy Arienzo received an equity award of 2,491 shares of Common Stock in the form of restricted stock units. The RSUs carry no purchase price and were granted as compensation, not as an open-market share purchase or sale.

According to the terms, these restricted stock units will vest if she continues serving the company until the earlier of one year from the grant date or the day before the next annual meeting of stockholders. Following this award, she directly holds a total of 19,882 shares of Common Stock.

Insider Trade Summary

Grant/Award: 2,491 shares

Grant/Award 1 txn

Insider Arienzo Wendy

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	2,491	$0.00	$0.00

Holdings After Transaction: Common Stock — 19,882 shares (Direct)

Footnotes (1)

1. F1. Represents restricted stock units that, subject to the Reporting Person's continued service to the Issuer, will vest at the earlier of one year from the date of grant or the day before the date of the next annual meeting of stockholders.

Key Figures

RSU grant size: 2,491 shares Price per share: $0.00 per share Shares held after grant: 19,882 shares +1 more

4 metrics

RSU grant size 2,491 shares Restricted stock units of Common Stock awarded to director

Price per share $0.00 per share Compensation grant, not an open-market purchase

Shares held after grant 19,882 shares Director’s direct Common Stock holdings following the award

Vesting period 1 year or earlier date Vests at earlier of one year from grant or day before next annual meeting

Key Terms

restricted stock units, Common Stock, annual meeting of stockholders

3 terms

restricted stock units financial

"Represents restricted stock units that, subject to the Reporting Person's continued service to the Issuer, will vest..."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Common Stock financial

"security_title: Common Stock, transaction_shares: 2491.0000"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

annual meeting of stockholders financial

"the day before the date of the next annual meeting of stockholders"

FAQ

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

What did POWER INTEGRATIONS INC (POWI) director Wendy Arienzo report in this Form 4?

Director Wendy Arienzo reported receiving 2,491 restricted stock units of POWER INTEGRATIONS INC Common Stock as a compensation grant at no purchase price. These units increase her direct holdings and are tied to future vesting conditions based on continued service.

How many POWER INTEGRATIONS INC shares does Wendy Arienzo hold after this RSU grant?

After the 2,491-share restricted stock unit grant, Wendy Arienzo directly holds 19,882 shares of POWER INTEGRATIONS INC Common Stock. This figure reflects her position immediately following the award reported in the Form 4 filing with the vesting conditions still outstanding.

What are the vesting terms of Wendy Arienzo’s 2,491 restricted stock units at POWER INTEGRATIONS INC?

The 2,491 restricted stock units vest if Wendy Arienzo continues serving POWER INTEGRATIONS INC until the earlier of one year from the grant date or the day before the next annual stockholder meeting. Vesting depends entirely on her continued service to the company.

Was Wendy Arienzo’s POWER INTEGRATIONS INC RSU grant an open-market stock purchase?

No, the RSU grant was not an open-market stock purchase. The 2,491 restricted stock units were awarded at a price of $0.00 per share as compensation, meaning she did not buy shares in the market but received an equity-based award from the company.

Does this POWER INTEGRATIONS INC Form 4 show any stock sales by Wendy Arienzo?

This Form 4 does not report any stock sales by Wendy Arienzo. It only shows a grant of 2,491 restricted stock units and her resulting direct holdings of 19,882 shares following the grant, with vesting subject to continued service conditions.

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

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Accepted by SEC EDGAR 07/06/2026 - 07:15 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Arienzo Wendy

(Last) (First) (Middle)

5245 HELLYER AVE

(Street)

SAN JOSE CALIFORNIA 95138

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
POWER INTEGRATIONS INC [ POWI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/01/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	07/01/2026		A		2,491(1)	A	$0.0	19,882	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents restricted stock units that, subject to the Reporting Person's continued service to the Issuer, will vest at the earlier of one year from the date of grant or the day before the date of the next annual meeting of stockholders.

	By: /s/ Eric Verity Attorney In Fact For: Wendy Arienzo	07/06/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)