| Id | Content |
|---|---|
| F1 | Each restricted stock unit ("RSU") represents a contingent right to receive one share of KLA common stock. |
| F2 | The remaining fifty percent (50%) of the performance-based RSUs that were granted to the Reporting Person on August 3, 2017, vested upon his completion of four years of service following the grant of the award. |
| F3 | Does not include performance-based RSUs, if any, held by the Reporting Person for which an assessment has not yet been made regarding the achievement of the applicable performance goals. Any such holdings will be reported on a Form 4 within two business days of the date such assessment is made. |
| F4 | 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 3, 2021. |
| F5 | On August 3, 2017, the Reporting Person was granted RSUs for 3,752 shares of KLA common stock. On August 3, 2021, the remaining 25% of the RSUs vested. |
| F6 | This sale was effected pursuant to the terms of a Rule 10b5-1 trading plan adopted by the Reporting Person on February 25, 2021. |