| Id | Content |
|---|---|
| F1 | Represents shares withheld to pay withholding taxes due upon settlement of stock acquired as a result of the achievement of the TSR performance metric of the KBR Long-Term Performance Cash and Stock Awards granted in 2020. |
| F2 | The reporting person was granted restricted stock units that convert to common stock on a 1-to-1 ratio where 80% vest 33 1/3% on each anniversary of the grant date and 20% vest 33 1/3% on each anniversary of the grant date subject to meeting a performance requirement. These restricted stock units represent the portion of the grant (80%) not subject to a performance requirement. |