X0306 4 2022-08-02 0 0000319201 KLA CORP KLAC 0001196898 WALLACE RICHARD P ONE TECHNOLOGY DRIVE MILPITAS CA 95035 0 1 0 0 President and CEO Common Stock 2022-08-02 4 F 0 13747 382.69 D 214270 D Common Stock 2022-08-02 4 F 0 3420 382.69 D 210850 D Common Stock 9182 I By Trust The Reporting Person vested the remaining 50% of the performance-based restricted stock units ("RSUs"), upon his completion of four years of service (August 2, 2022) following the award on August 2, 2018. The Compensation Committee of KLA's Board of Directors determined the level at which the underlying performance goals were attained (August 5, 2021). 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 2, 2022. The number of shares of KLA common stock includes 119,904 shares issuable upon vesting of RSUs. On August 2, 2018, the Reporting Person was granted RSUs for 27,589 shares of KLA common stock. On August 2, 2022, 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 2, 2022. The number of shares of KLA common stock includes 113,007 shares issuable upon vesting of RSUs. Shares held under the Wallace Living Trust u/a/d 03/27/01, as amended, a trust of which the Reporting Person is a trustee and beneficiary. /s/ Jeffrey Cannon, attorney-in-fact for Richard P. Wallace 2022-08-04