X0306 4 2022-08-05 0 0000319201 KLA CORP KLAC 0001802832 Donzella Oreste ONE TECHNOLOGY DRIVE MILPITAS CA 95035 0 1 0 0 Executive Vice President Common Stock 2022-08-05 4 S 0 2072 389.09 D 38347 D Common Stock 2022-08-05 4 F 0 317 395.74 D 38030 D Common Stock 2022-08-06 4 F 0 498 395.74 D 37532 D This sale was effected pursuant to the terms of a Rule 10b5-1 trading plan adopted by the Reporting Person on February 1, 2022. The number of shares of KLA common stock includes 26,951 shares issuable upon vesting of restricted stock units ("RSUs"). On August 5, 2021, the Reporting Person was granted RSUs for 2,402 shares of KLA common stock. On August 5, 2022, twenty-five percent (25%) of the RSUs vested. Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld at vesting to cover required tax withholding. The fair market value of KLA common stock used for purposes of calculating the number of shares to be withheld was the closing price of KLA common stock as reported on August 5, 2022. The number of shares of KLA common stock includes 26,350 shares issuable upon vesting of RSUs. On August 6, 2020, the Reporting Person was granted RSUs for 3,777 shares of KLA common stock. On August 6, 2022, twenty-five percent (25%) of the RSUs vested. Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld at vesting to cover required tax withholding. The fair market value of KLA common stock used for purposes of calculating the number of shares to be withheld was the closing price of KLA common stock as reported on August 5, 2022. The number of shares of KLA common stock includes 25,406 shares issuable upon vesting of RSUs. /s/ Jeffrey Cannon, attorney-in-fact for Oreste Donzella 2022-08-09