X0609 4 2026-10-11 0 0000056978 KULICKE & SOFFA INDUSTRIES INC KLIC 0001887782 Chylak Robert Nestor false 1005 VIRGINIA DRIVE FORT WASHINGTON PA 19034 0 1 0 0 Senior Vice President 0 Common Stock 2026-10-11 4 M 0 9498 0 A 32485 D Common Stock 2026-10-11 4 F 0 3338 47.44 D 29147 D Common Stock 2026-10-11 4 F 0 610 47.44 D 28537 D Performance Share Units 2026-10-11 4 M 0 9498 0 D Common Stock 9498 0 D Performance Share Units (PSUs) awarded October 11, 2023, achieved a 148% payout based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of the Performance Period with the relative TSR measured over a three-year period. The payout was certified, and shares issued on October 11, 2026. Each PSU is convertible to one share of common stock. Represents shares withheld by the Issuer to satisfy tax withholding obligations in connection with issuance of 9,498 shares of common stock arising from payout under Performance Share Units (PSUs) awarded on October 11, 2023. The payout was certified, and the shares were issued on October 11, 2026, each PSU convertible into one share of common stock. These shares that were withheld were not issued to or sold by the Reporting Person. Represents shares withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of 2,139 restricted stock units (RSUs) on October 11, 2026. This RSU vesting is in connection to an RSU award granted on October 11, 2023 of 6,417 shares. These shares that were withheld were not issued to or sold by the Reporting Person. Zi Yao Lim, Attorney-in-Fact for Robert Nestor Chylak 2026-10-13