Transaction Details

Footnotes

Represents the shares withheld to pay the related tax liability of the restricted stock units (RSUs) that vested on November 18, 2025. | Shares acquired pursuant to vesting of performance stock units earned under 2018 Equity Incentive Plan. | Represents the shares withheld to pay the related tax liability of performance stock units that vested on November 18, 2025. | Represents the shares withheld to pay the related tax liability of the restricted stock units (RSUs) that vested on November 30, 2025. | Represents an award of RSUs, each unit of which represents a contingent right to receive one share of Tetra Tech common stock. | The RSUs become vested as to 25% of the shares on November 18, 2022, and 25% annually, thereafter, until fully vested. | The RSUs are exercisable at the time of vesting and do not have a set expiration date. | The RSUs become vested as to 25% of the shares on November 18, 2023, and 25% annually, thereafter, until fully vested. | The RSUs become vested as to 25% of the shares on November 30, 2026, and 25% annually, thereafter, until fully vested. | The RSUs become vested as to 25% of the shares on November 30, 2024, and 25% annually, thereafter, until fully vested. | The RSUs become vested as to 25% of the shares on November 30, 2025, and 25% annually, thereafter, until fully vested.