Investor Presentation

February 2021

WATERENVIRONMENTSUSTAINABLE INFRASTRUCTURERENEWABLE ENERGY

Forward Looking Statements & Non-GAAP Financial Measures

Certain statements contained in this presentation are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements involve risks and uncertainties, such as those related to fluctuations in the Company's quarterly operating results and stock price, and the other risks detailed from time to time in the Company's SEC reports.

To supplement the financial results presented in accordance with generally accepted accounting principles in the United States ("GAAP"), we present certain non-GAAP financial measures within the meaning of Regulation G under the Securities Exchange Act of 1934, as amended. We provide these non-GAAP financial measures because we believe they provide a valuable perspective on our financial results. However, non-GAAP measures have limitations as analytical tools and should not be considered in isolation and are not in accordance with, or a substitute for, GAAP measures. In addition, other companies may define non-GAAP measures differently which limits the ability of investors to compare non-GAAP measures of Tetra Tech to those used by our peer companies. A reconciliation of these non-GAAP financial measures to the most directly comparable GAAP financial measures is available at investor.tetratech.com.

Our Business: Leading with Science®

17,000 Clients | 65,000 Projects

2020: $3.0B Revenue

450 OFFICES WORLDWIDE | 20,000 ASSOCIATES

PREMIER GLOBAL CONSULTING AND ENGINEERING FIRM

Industry Rankings: Leading Market Positions

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Disclaimer

Tetra Tech Inc. published this content on 23 February 2021 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 23 February 2021 03:43:01 UTC.