Transaction Details

Footnotes

Shares acquired pursuant to vesting of performance stock units ("PSU") earned under 2018 Equity Incentive Plan. The PSUs vested between 11/23/2021 and 11/18/2025 but were deferred under the Issuer's Deferred Compensation Plan and have settled upon retirement. | Represents an award of restricted stock units (RSUs), each unit of which represents a contingent right to receive one share of Tetra Tech common stock. | The RSUs become 100% vested as to the shares underlying the RSUs on the first anniversary date. | The RSUs are exercisable at the time of vesting and do not have a set expiration date. | On September 6, 2024, the balance of 410 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 1,640 shares of common stock. | On September 6, 2024, the balance of 159 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 636 shares of common stock. | On September 6, 2024, the balance of 380 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 1,520 shares of common stock. | On September 6, 2024, the balance of 425 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 1,700 shares of common stock.