X0609 4 2026-07-01 0 0000833640 POWER INTEGRATIONS INC POWI 0001701222 Arienzo Wendy false 5245 HELLYER AVE SAN JOSE CA 95138 1 0 0 0 0 Common Stock 2026-07-01 4 A 0 2491 0.0 A 19882 D 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 2026-07-06