X0508 4 2023-08-04 0 0000319201 KLA CORP KLAC 0001802832 Donzella Oreste ONE TECHNOLOGY DRIVE MILPITAS CA 95035 0 1 0 0 Executive Vice President 0 Common Stock 2023-08-04 4 F 0 334 496.47 D 28755.392 D Common Stock 2023-08-05 4 F 0 317 496.47 D 28438.392 D Common Stock 2023-08-06 4 F 0 498 496.47 D 27940.392 D Common Stock 2023-08-06 4 F 0 1492 496.47 D 26448.392 D On August 4, 2022, the Reporting Person was granted restricted stock units ("RSUs") for 2,533 shares of KLA common stock. On August 4, 2023, 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 4, 2023. The number of shares of KLA common stock includes 19,962 shares issuable upon vesting of RSUs. On August 5, 2021, the Reporting Person was granted RSUs for 2,402 shares of KLA common stock. On August 5, 2023, 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 4, 2023. The number of shares of KLA common stock includes 19,361 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, 2023, 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 4, 2023. The number of shares of KLA common stock includes 18,417 shares issuable upon vesting of RSUs. The Reporting Person vested 50% of the performance-based restricted stock units ("RSUs") granted on August 6, 2020. 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 4, 2023. The number of shares of KLA common stock includes 15,584 shares issuable upon vesting of RSUs. /s/ Jeffrey S. Cannon, as attorney-in-fact for Oreste Donzella 2023-08-08