X0508 4 2023-08-01 0 0000319201 KLA CORP KLAC 0001802832 Donzella Oreste ONE TECHNOLOGY DRIVE MILPITAS CA 95035 0 1 0 0 Executive Vice President 0 Common Stock 2023-06-30 5 J 0 E 66.392 320.068 A 24444.392 D Common Stock 2023-08-01 4 F 0 2117 514.28 D 22327.392 D Common Stock 2023-08-01 4 F 0 706 514.28 D 21621.392 D Purchased under the registrant's employee stock purchase plan. Represents 85% of the closing price of the registrant's stock on the employee stock purchase plan on January 3, 2023. The number of shares of KLA common stock includes 18,488 shares issuable upon vesting of restricted stock units ("RSUs"). The Reporting Person vested the remaining 50% of the performance-based RSUs, upon his completion of four years of service (August 1, 2023) following the award on August 1, 2019. The Compensation Committee of KLA's Board of Directors determined the level at which the underlying performance goals were attained (August 4, 2022). 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 1, 2023. The number of shares of KLA common stock includes 14,468 shares issuable upon vesting of RSUs. On August 1, 2019, the Reporting Person was granted RSUs for 5,360 shares of KLA common stock. On August 1, 2023, the remaining 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 1, 2023. The number of shares of KLA common stock includes 13,128 shares issuable upon vesting of RSUs. /s/ Jeffrey S. Cannon, as attorney-in-fact for Oreste Donzella 2023-08-03