TETRA TECH INC
Tetra Tech, Inc. (NASDAQ: TTEK) is a leading global provider of high-end consulting and engineering services focused on water, environment, and sustainable infrastructure. The company operates through two reportable segments: the Government Services Group, which generates 49.1% of revenue and primarily serves U.S.… From the company’s description.
Margins and return on equity change in ; everything else in percent. Fewer shares and less debt are shown plainly, not as bad news — it depends what you make of buybacks. Dotted labels explain each measure. is shown separately from the annual figures.
What TETRA TECH INC does
In the company’s own words
Tetra Tech, Inc. (NASDAQ: TTEK) is a leading global provider of high-end consulting and engineering services focused on water, environment, and sustainable infrastructure. The company operates through two reportable segments: the Government Services Group, which generates 49.1% of revenue and primarily serves U.S. federal, state, and local government clients as well as international development agencies, and the Commercial/International Services Group, which accounts for 52.3% of revenue and serves U.S. commercial clients and international clients outside development agencies.
The company maintains a workforce of more than 25,000 associates across more than 100 countries on all seven continents. Tetra Tech's service portfolio spans the complete project lifecycle, from early-stage data collection and monitoring through design, implementation, and operations and maintenance. The company's core competencies include water resources analysis and management, environmental monitoring, sustainable infrastructure design, disaster management, renewable energy development, and advanced data analytics powered by artificial intelligence and machine learning technologies.
Tetra Tech operates under the "Leading with Science" brand philosophy, leveraging proprietary technologies collectively known as Tetra Tech Delta to differentiate its market position. These technologies include advanced analytics, digital solutions, and AI-enabled software for applications such as asset management, condition assessments, and infrastructure optimization. The company has been ranked number one by Engineering News-Record in water treatment and desalination for twelve consecutive years and holds top rankings across numerous other categories including environmental management, wind power, and site assessment.
The company generates revenue through three principal contract types: fixed-price contracts representing 43.5% of revenue, time-and-materials contracts at 42.6%, and cost-plus contracts at 13.9%. Major clients include the U.S. federal government, which represents 31.6% of revenue, with the United States Agency for International Development and Department of Defense being particularly significant. International operations, primarily in Australia, Canada, Europe, and the United Kingdom, represent 37.4% of revenue.
Tetra Tech's website is located at tetratech.com.
Company details
- Sector
- Industrials
- Industry
- Professional Services
- Headquarters
- PASADENA, CA
- Fiscal year end
- September
- CIK
- 831641
- SIC
- 8711
Financial performance, year by year
Fiscal 2013–2025 · USDThe full income statement, balance sheet and cash flow for each of these years — every figure traceable to its filing — is on the Financials tab with a free account.
Who owns TETRA TECH INC — and what changed
Funds as of 2026Q2 · superinvestors as of 2026-06-30
Largest fund holders · TETRA TECH INC’s weight in each
Fund ownership is a floor, not a census — pensions, insurers and people holding shares directly are not visible here.
TETRA TECH INC’s bonds, as funds hold them
Funds report holding 1 issues of TETRA TECH INC’s debt, $114.29M at market value — what funds hold, not the company’s total debt. Weighted-average coupon 2.25%, maturing 2028 to 2028.
Fund ownership counts N-PORT filers only, so it is a floor rather than a census — pensions, insurers and direct holders are not visible here, and the remainder is not “held by individuals”.
Every fund and institutional holder, quarter by quarter, is on the Ownership tab with a free account.
Recent filings
All filings →Each filing opens into its own statements and disclosures here.
Put this business in context.
Compare this company with peers, find it in your funds and follow its financial history with your connected AI:
- “How do TETRA TECH INC and its peers compare on margins and cash generation over ten years?”
- “Where did five years of TETRA TECH INC's earnings go — cash, debt, buybacks, reinvestment?”
- “What changed in TETRA TECH INC's last four quarterly filings that the numbers alone won't show?”