UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended April 2, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 0-19655 TETRA TECH, INC. (Exact name of registrant as specified in its charter) (State or other jurisdiction of incorporation or orga ...

Financial Data and Key Metrics Changes - Revenue for Q2 2023 exceeded $1 billion for the first time, reaching $970 million, a 39% increase year-over-year from $700 million [5][6] - EBITDA income increased by 30% year-over-year, reaching a record $105 million for the second quarter [5] - Earnings per share (EPS) rose to $1.17, up 19% from the previous year [5][6] - Without the contribution of RPS, revenue was $989 million, a 16% increase year-over-year, with EPS of $1.20, up 22% [6] Performance by Business Lines - U.S. federal client work increased by 59%, driven by growth in water and environmental programs, including support for Ukraine [7] - State and local revenues grew by 12%, supported by digital water and municipal infrastructure projects [7] - International revenues increased by 55%, with a growth of 11% excluding RPS, driven by high-performance buildings work in Canada, Australia, and the UK [7] - Government Services Group (GSG) segment grew by 29%, with a significant contribution from Ukraine-related work [8] - Commercial/International Group (CIG) segment grew by 47%, with a 13% increase excluding RPS, driven by renewable energy programs [9] Market Data and Key Metrics Changes - Backlog increased by 18% year-over-year, reaching an all-time high of $4.275 billion [9] - New contracts included a $105 million U.S. Watershed Assessment Contract and a $54 million disaster planning contract in Puerto Rico [10] Company Strategy and Industry Competition - The company is focused on integrating RPS to improve profit margins and align them with Tetra Tech's margins [12][13] - Tetra Tech aims to leverage its expertise in sustainable infrastructure and renewable energy to drive future growth [27] - The company has been recognized as a leader in water and environmental management, ranking number one in various categories by Engineering News Record [20][21] Management's Comments on Operating Environment and Future Outlook - Management expressed confidence in the underlying business performance, with growth rates exceeding expectations across all end markets [29] - The company anticipates continued strong demand for its services, particularly in light of upcoming federal funding initiatives [31][62] - Management noted that the integration of RPS is exceeding expectations and creating new opportunities [27] Other Important Information - Cash flows from operations totaled $108 million, up 13% year-over-year, with a Days Sales Outstanding (DSO) of 59 days [11] - The quarterly dividend was increased to $0.26 per share, marking the ninth consecutive year of double-digit increases [11] Q&A Session Summary Question: Insights on RPS accretion targets and underlying Tetra Tech earnings growth - Management highlighted strong underlying performance with revenue growth in the 20% range, driven by federal funding initiatives [29][30] Question: Margin expectations and cash conversion trends - Management expects margin expansion in both Commercial/International and Government Services segments, with cash from operations exceeding net income [35][36] Question: RPS EBITDA margin targets and backlog contributions - RPS is expected to align its EBITDA margins with Tetra Tech's by 2025, with a stable backlog performance noted [37][53] Question: Impact of interest rates on commercial business - Management indicated that about half of commercial work is driven by regulatory requirements, which are less sensitive to interest rate fluctuations [44][46] Question: Future growth prospects and backlog contributions - Management sees potential for significant contributions from federal government funding, particularly in decarbonization and clean water initiatives [61][62]

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended January 1, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 0-19655 TETRA TECH, INC. (Exact name of registrant as specified in its charter) Delaware 95-4148514 (State or other jurisdiction of ...

Tetra Tech, Inc. (NASDAQ:TTEK) Q1 2023 Earnings Conference Call February 2, 2023 11:00 AM ET Company Participants Dan Batrack - Chairman & Chief Executive Officer Steve Burdick - Chief Financial Officer Jill Hudkins - President Conference Call Participants Noelle Dilts - Stifel Andy Wittmann - Baird Alex Dwyer - KeyBanc Tate Sullivan - Maxim Group Michael Dudas - Vertical Research Operator Good morning and thank you for joining the Tetra Tech Earnings Call. As a reminder, Tetra Tech is also simulcasting thi ...

EARNINGS CALL Q1-23February 2, 2023 Dan Batrack, Chairman & CEO Steve Burdick, Executive VP & CFO Jill Hudkins, President WATER ENVIRONMENT SUSTAINABLE INFRASTRUCTURE Leading with Science® Forward Looking Statements & Non-GAAP Financial Measures All statements in this communication other than statements of historical fact are "forward-looking statements" for purposes of federal and state securities laws, including any statements of the plans, strategies and objectives for future operations, profitability, s ...

(626) 351-4664 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ____________________________________________________________________________ FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended October 2, 2022 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File Number 0-19655 __________________________________________ ...

Financial Data and Key Metrics Changes - The company achieved record revenue of $3.5 billion for fiscal year 2022, up 9% from the previous year, and record net revenue of $2.84 billion, up 11% year-over-year [19] - Fourth quarter net revenue reached an all-time high of $736 million, a 12% increase from the same quarter last year, with operating income of $94 million, resulting in earnings per share of $1.26, up 30% year-over-year [11][19] - The backlog increased to an all-time high of $3.74 billion, representing an 8% increase from last year [16] Performance by Business Lines - Government Services Group (GSG) revenue was $336 million, up 8% year-over-year, with a margin of 15.1%, an increase of 130 basis points [14] - The Commercial/International Group (CIG) grew by 15% year-over-year, delivering a margin of 13.6%, up 80 basis points [15] - U.S. federal client revenue accounted for 29% of total revenue, increasing by 15% year-over-year, while U.S. commercial net revenue was up 25% [12][13] Market Data and Key Metrics Changes - International revenues increased by 15% on a constant currency basis, driven by sustainable infrastructure programs in Australia, the UK, and Canada [13] - The company reported strong demand for services aligned with climate change priorities across government and commercial clients [7] Company Strategy and Development Direction - The company is focused on water, environment, and sustainable infrastructure, leveraging its "Leading with Science" approach [6] - The strategic acquisition of RPS Group is expected to enhance capabilities in water management and expand geographic reach [48][50] - The company anticipates growth driven by recent legislative actions, including the Infrastructure Investment and Jobs Act, CHIPS Act, and Inflation Reduction Act [34][39] Management's Comments on Operating Environment and Future Outlook - Management expects U.S. federal revenue to grow by about 10% in alignment with government priorities, with state and local revenues projected to grow at a double-digit pace [43][44] - The company is optimistic about the impact of new funding from the Infrastructure Investment and Jobs Act, expecting new orders to ramp up in the second half of fiscal year 2023 [35][36] - Management noted that the Inflation Reduction Act may have the longest lag in terms of impact, with contributions expected in fiscal year 2024 [98] Other Important Information - The company paid out $46 million in dividends in fiscal 2022, with a 15% increase in the quarterly dividend to $0.23 per share [25] - The company returned $246 million to shareholders through dividends and share buybacks, achieving a total shareholder return of 54% over the last three years [26] Q&A Session Summary Question: Why is there no material contribution from IIJA funding in fiscal '23 guidance? - Management explained that funding flows through a sequence of steps, with solicitations for contracts occurring before revenue recognition, leading to a slow ramp-up in fiscal year 2023 [56][58][62] Question: What are the margin enhancement expectations from the RPS acquisition? - Management indicated that RPS historically had higher margins than Tetra Tech and expects to achieve double-digit margins within the first year post-acquisition [63][68] Question: Is RPS seen as a platform for further international acquisitions? - Management confirmed that RPS will provide a foothold for additional bolt-on acquisitions in international markets, particularly in the UK and Australia [80][84] Question: What is the expected financial profile post-RPS acquisition? - Management stated that they aim to maintain leverage between 1 to 2 times earnings and prioritize internal growth and acquisitions over buybacks [108][109]

EARNINGS CALL Q4-22November 10, 2022 Dan Batrack, Chairman & CEO Steve Burdick, Executive VP & CFO Jill Hudkins, President WATER ENVIRONMENT SUSTAINABLE INFRASTRUCTURE Leading with Science® 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 qua ...

Financial Data and Key Metrics Changes - Tetra Tech reported record third quarter revenue, net revenue, operating income, and earnings per share, with net revenue increasing 13% year-over-year from $638 million to $720 million [11][22] - Operating income rose 20% year-over-year to $84 million, reflecting a 70 basis point increase in operating margin [8][23] - Earnings per share reached $1.09, up 15% from $0.95 last year, marking a new all-time high for the third quarter [12][24] Business Line Data and Key Metrics Changes - The Commercial International Group (CIG) segment grew by 19% year-over-year, achieving a margin of 13.8%, up 230 basis points from the prior year [17] - The Government Services Group (GSG) segment grew by 6% with a margin of 13.4%, consistent with the expected range [19] - U.S. commercial net revenue was up 19% year-over-year, contributing to strong growth in environmental permitting and renewable energy services [15] Market Data and Key Metrics Changes - International revenue represented 35% of total revenue, increasing 18% year-over-year, and 26% on a constant currency basis [13] - State and local revenues were up 10%, marking the seventh consecutive quarter of double-digit growth [14] - Federal client work represented 27% of net revenues, up 8% year-over-year, excluding the impact of the Afghanistan wind-down [16] Company Strategy and Development Direction - Tetra Tech's strategy focuses on providing high-end services in water and environmental markets, addressing climate change and increasing resiliency [9][41] - The company is advancing its digital water growth strategy, expecting to double its digital water practice revenue from $150 million in the next three years [35][36] - Recent acquisitions are aimed at enhancing digital capabilities and expanding service offerings [28][70] Management's Comments on Operating Environment and Future Outlook - Management expressed optimism about the contributions from the Bipartisan Infrastructure Investment and Jobs Act (IIJA) starting in early 2023, alongside other federal funding opportunities [46][51] - There are concerns about slower contract activity due to personnel challenges within government agencies, impacting growth [55][56] - Management anticipates continued growth in federal revenues, despite a slower ramp-up compared to historical trends [58][60] Other Important Information - The company has a strong cash position of over $200 million and a net debt to EBITDA leverage of 0.1x [26] - Tetra Tech has returned $184 million to shareholders through dividends and share buybacks year-to-date [30][29] - The company has a backlog of $3.65 billion, up 12% year-over-year on a constant currency basis [20] Q&A Session Summary Question: Insights on fiscal '23 growth rates and considerations - Management noted positive indications for growth in fiscal '23, particularly from IIJA and other federal funding programs, while acknowledging potential foreign exchange impacts [45][46][54] Question: Impact of slow new award activity on growth - Management confirmed a slight slowdown in contract activity across federal agencies, attributing it to COVID-related personnel challenges [55][56][58] Question: Convergence of GSG and CIG margins - Management indicated that CIG margins are expected to converge with GSG margins without a decline in GSG, with both segments showing strength [62][64] Question: Update on Software-as-a-Service and Platform-as-a-Service offerings - Management highlighted progress in Platform-as-a-Service offerings, with recent acquisitions supporting subscription-based revenue growth [66][70] Question: Details on the $500 million Army Corps of Engineers contract - Management clarified that the contract is new and not a renewal, with initial task orders expected to be funded in Q4 [75][79]

(Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended July 3, 2022 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 0-19655 TETRA TECH, INC. (Exact name of registrant as specified in its charter) Delaware 95-4148514 (State or other jurisdiction of in ...