Tetra Tech, Inc. (TTEK)

Tetra Tech Revenue

Tetra Tech had revenue of $1.31B in the quarter ending June 28, 2026, a decrease of -4.47%. This brings the company's total for the last twelve months to $5.07B, down -7.61% year-over-year. In the fiscal year ending September 28, 2025, Tetra Tech had annual revenue of $5.44B with 4.69% growth. That makes Tetra Tech the 2,917th largest company in the world by revenue and 838th in the United States.

• Revenue (ttm): $5.07B
• Revenue Growth: -7.61%
• P/S Ratio: 2.21
• Revenue / Employee: $174,347
• Employees: 25,000
• Market Cap: 9.63B

Revenue Chart

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Revenue by Segment

By Segment

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• International 2.03B 37.4%
• U.S. Federal Government 1.72B 31.6%
• U.S. Commercial 899.30M 16.5%
• U.S. State And Local Government 789.97M 14.5%

By Geography

• United States 3.45B 63.3%
• United Kingdom 771.72M 14.2%
• Canada 512.30M 9.4%
• Australia 489.10M 9.0%
• Others 223.63M 4.1%

Fiscal year ended Sep 28, 2025 See the full Tetra Tech breakdown

Revenue History

Fiscal Year End	Revenue	Change	Growth
Sep 28, 2025	5.44B	243.91M	4.69%
Sep 29, 2024	5.20B	676.13M	14.95%
Oct 1, 2023	4.52B	1.02B	29.07%
Oct 2, 2022	3.50B	290.54M	9.04%
Oct 3, 2021	3.21B	218.62M	7.30%
Sep 27, 2020	2.99B	-112.46M	-3.62%
Sep 29, 2019	3.11B	143.20M	4.83%
Sep 30, 2018	2.96B	210.79M	7.66%
Oct 1, 2017	2.75B	169.89M	6.58%
Oct 2, 2016	2.58B	284.15M	12.36%
Sep 27, 2015	2.30B	-184.49M	-7.43%
Sep 28, 2014	2.48B	-129.94M	-4.97%
Sep 29, 2013	2.61B	-97.32M	-3.59%
Sep 30, 2012	2.71B	137.93M	5.36%
Oct 2, 2011	2.57B	371.91M	16.90%
Oct 3, 2010	2.20B	-86.25M	-3.77%
Sep 27, 2009	2.29B	142.23M	6.63%
Sep 28, 2008	2.15B	591.37M	38.06%
Sep 30, 2007	1.55B	139.18M	9.84%
Oct 1, 2006	1.41B	135.17M	10.56%
Oct 2, 2005	1.28B	-	-

Data Sources: Fiscal.ai and S&P Global Market Intelligence Last updated: Jul 31, 2026

Revenue data is provided by Fiscal.ai and updates within minutes after each earnings release, which is every three months for this company. Revenue geography data is provided by S&P Global Market Intelligence.

Update frequency:

Quarterly

Last checked:

Nov 11, 2026

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