POWI · Power Integrations Inc

The sale reported on this Form 4 represents shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of RSUs. The sale was to satisfy tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary transaction by the Reporting Person.

The sale reported on this Form 4 represents shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of RSUs. The sale was to satisfy tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary transaction by the Reporting Person.

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.

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.

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.

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.

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.

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.

The price reported is a weighted average price. These shares were sold in multiple transactions at sale prices ranging from $86.8442 to $87.22.The Reporting Person undertakes to provide the full information regarding the number of shares sold at each separate price upon further request.

The price reported is a weighted average price. These shares were sold in multiple transactions at sale prices ranging from $85.84 to $86.7601.The Reporting Person undertakes to provide the full information regarding the number of shares sold at each separate price upon further request.

The price reported is a weighted average price. These shares were sold in multiple transactions at sale prices ranging from $82.04 to $82.49. The Reporting Person undertakes to provide the full information regarding the number of shares sold at each separate price upon further request.

The price reported is a weighted average price. These shares were sold in multiple transactions at sale prices ranging from $80.52 to $81.25.The Reporting Person undertakes to provide the full information regarding the number of shares sold at each separate price upon further request.

The price reported is a weighted average price. These shares were sold in multiple transactions at sale prices ranging from $82.08 to $82.44.The Reporting Person undertakes to provide the full information regarding the number of shares sold at each separate price upon further request.

Represents the automatic sale of stock to cover the tax liability associated with the vesting of a Restricted Stock Award.

Represents the automatic sale of stock to cover the tax liability associated with the vesting of a Restricted Stock Award.

Represents the automatic sale of stock to cover the tax liability associated with the vesting of a Restricted Stock Award.

Represents the automatic sale of stock to cover the tax liability associated with the vesting of a Restricted Stock Award.

Represents the automatic sale of stock to cover the tax liability associated with the vesting of a Restricted Stock Award.

Represents the automatic sale of stock to cover the tax liability associated with the vesting of a Restricted Stock Award.

Represents the automatic sale of stock to cover the tax liability associated with the vesting of a Performance Stock Unit.

Represents the automatic sale of stock to cover the tax liability associated with the vesting of a Performance Stock Unit.

Represents the automatic sale of stock to cover the tax liability associated with the vesting of a Performance Stock Unit.

Represents the automatic sale of stock to cover the tax liability associated with the vesting of a Performance Stock Unit.

The reporting person was granted a Performance Stock Unit. The Performance Stock Unit vests based on Power Integrations satisfaction of certain performance conditions. The performance conditions for 2025 were met.

The reporting person was granted a Performance Stock Unit. The Performance Stock Unit vests based on Power Integrations satisfaction of certain performance conditions. The performance conditions for 2025 were met.

The reporting person was granted a Performance Stock Unit. The Performance Stock Unit vests based on Power Integrations satisfaction of certain performance conditions. The performance conditions for 2025 were met.

The reporting person was granted a Performance Stock Unit. The Performance Stock Unit vests based on Power Integrations satisfaction of certain performance conditions. The performance conditions for 2025 were met.

Represents the automatic sale of stock to cover the tax liability associated with the vesting of a Restricted Stock Award.

Represents the automatic sale of stock to cover the tax liability associated with the vesting of a Restricted Stock Award.

Represents the automatic sale of stock to cover the tax liability associated with the vesting of a Restricted Stock Award.

Represents the automatic sale of stock to cover the tax liability associated with the vesting of a Restricted Stock Award.

Represents the automatic sale of stock to cover the tax liability associated with the vesting of a Restricted Stock Award.

Represents the automatic sale of stock to cover the tax liability associated with the vesting of a Restricted Stock Award.

Represents the automatic sale of stock to cover the tax liability associated with the vesting of a Restricted Stock Award.

This amendment corrects an administrative error that overstated the number of restricted stock units granted to the Reporting Person.

This amendment corrects an administrative error that overstated the number of restricted stock units granted to the Reporting Person.

Represents the automatic sale of stock to cover the tax liability associated with the vesting of a Restricted Stock Award.