Listed

Tetra Tech Inc

TTEKNasdaqCIK 831641IndustrialsFiscal year ends Sep 27

Latest reported revenue, Q3 FY2026$1.31bnRevenue, Q3 FY2026, three months to 2026-06-28$1.31bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Report this figureThree months to Jun 28, 2026, from the 10-Q filed Jul 31, 2026.

Latest quarter: Q3 FY2026

Three months to Jun 28, 2026, against the same quarter a year earlier.

  • Revenue$1.31bnRevenue, Q3 FY2026, three months to 2026-06-28$1.31bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Report this figure−4.5% on a year earlier
  • Gross margin18.6%Gross margin, Q3 FY2026, three months to 2026-06-28. gross profit / revenueGross profit: $243.2m. XBRL concept us-gaap:GrossProfit. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Revenue: $1.31bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Report this figure+0.2 pts on a year earlier
  • Operating margin12.1%Operating margin, Q3 FY2026, three months to 2026-06-28. operating income / revenueOperating income: $157.9m. XBRL concept us-gaap:OperatingIncomeLoss. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Revenue: $1.31bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Report this figure+0.0 pts on a year earlier
  • Net margin8.4%Net margin, Q3 FY2026, three months to 2026-06-28. net income / revenueNet income: $109.8m. XBRL concept us-gaap:ProfitLoss. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Revenue: $1.31bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Report this figure+0.1 pts on a year earlier
  • Diluted EPS$0.42Diluted EPS, Q3 FY2026, three months to 2026-06-28$0.42 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Report this figure−2.3% on a year earlier
  • Free cash flow$225.1mFree cash flow, Q3 FY2026, three months to 2026-06-28. operating cash flow − capital expenditureOperating cash flow: $228.9m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2026-07-31, accession 0000831641-26-000017. Derived: 9-month figure less the 6-month figure.Capital expenditure: $3.8m. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-Q filed 2026-07-31, accession 0000831641-26-000017. Derived: 9-month figure less the 6-month figure.Report this figure−35.0% on a year earlier

Last eight quarters

Full statements
Revenue$1.31bnGross margin 18.6%
Diluted EPS$0.42, Q3 FY2026
Free cash flow$225.1m, Q3 FY2026
Tetra Tech Inc, key figures for the last eight quarters
Line itemUnitQ4 FY20242024-09-29Q1 FY20252024-12-29Q2 FY20252025-03-30Q3 FY20252025-06-29Q4 FY20252025-09-28Q1 FY20262025-12-28Q2 FY20262026-03-29Q3 FY20262026-06-28Shape over the periods
Revenue$m1,374Revenue, Q4 FY2024, three months to 2024-09-29$1.37bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure1,421Revenue, Q1 FY2025, three months to 2024-12-29$1.42bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-01-30, accession 0000831641-26-000005.Report this figure1,322Revenue, Q2 FY2025, three months to 2025-03-30$1.32bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-05-01, accession 0000831641-26-000011.Report this figure1,370Revenue, Q3 FY2025, three months to 2025-06-29$1.37bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Report this figure1,330Revenue, Q4 FY2025, three months to 2025-09-28$1.33bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure1,211Revenue, Q1 FY2026, three months to 2025-12-28$1.21bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-01-30, accession 0000831641-26-000005.Report this figure1,220Revenue, Q2 FY2026, three months to 2026-03-29$1.22bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-05-01, accession 0000831641-26-000011.Report this figure1,309Revenue, Q3 FY2026, three months to 2026-06-28$1.31bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Report this figure
Gross margin%17.8%Gross margin, Q4 FY2024, three months to 2024-09-29. gross profit / revenueGross profit: $245.3m. XBRL concept us-gaap:GrossProfit. 10-K filed 2025-11-20, accession 0000831641-25-000032. Derived: 12-month figure less the 9-month figure.Revenue: $1.37bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure15.6%Gross margin, Q1 FY2025, three months to 2024-12-29. gross profit / revenueGross profit: $221.5m. XBRL concept us-gaap:GrossProfit. 10-Q filed 2026-01-30, accession 0000831641-26-000005.Revenue: $1.42bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-01-30, accession 0000831641-26-000005.Report this figure16.2%Gross margin, Q2 FY2025, three months to 2025-03-30. gross profit / revenueGross profit: $214.2m. XBRL concept us-gaap:GrossProfit. 10-Q filed 2026-05-01, accession 0000831641-26-000011.Revenue: $1.32bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-05-01, accession 0000831641-26-000011.Report this figure18.4%Gross margin, Q3 FY2025, three months to 2025-06-29. gross profit / revenueGross profit: $251.5m. XBRL concept us-gaap:GrossProfit. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Revenue: $1.37bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Report this figure20.6%Gross margin, Q4 FY2025, three months to 2025-09-28. gross profit / revenueGross profit: $274.1m. XBRL concept us-gaap:GrossProfit. 10-K filed 2025-11-20, accession 0000831641-25-000032. Derived: 12-month figure less the 9-month figure.Revenue: $1.33bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure18.2%Gross margin, Q1 FY2026, three months to 2025-12-28. gross profit / revenueGross profit: $220.4m. XBRL concept us-gaap:GrossProfit. 10-Q filed 2026-01-30, accession 0000831641-26-000005.Revenue: $1.21bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-01-30, accession 0000831641-26-000005.Report this figure17.5%Gross margin, Q2 FY2026, three months to 2026-03-29. gross profit / revenueGross profit: $214.1m. XBRL concept us-gaap:GrossProfit. 10-Q filed 2026-05-01, accession 0000831641-26-000011.Revenue: $1.22bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-05-01, accession 0000831641-26-000011.Report this figure18.6%Gross margin, Q3 FY2026, three months to 2026-06-28. gross profit / revenueGross profit: $243.2m. XBRL concept us-gaap:GrossProfit. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Revenue: $1.31bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Report this figure
Operating margin%10.4%Operating margin, Q4 FY2024, three months to 2024-09-29. operating income / revenueOperating income: $143.3m. XBRL concept us-gaap:OperatingIncomeLoss. 10-K filed 2025-11-20, accession 0000831641-25-000032.Revenue: $1.37bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure1.6%Operating margin, Q1 FY2025, three months to 2024-12-29. operating income / revenueOperating income: $22.5m. XBRL concept us-gaap:OperatingIncomeLoss. 10-Q filed 2026-01-30, accession 0000831641-26-000005.Revenue: $1.42bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-01-30, accession 0000831641-26-000005.Report this figure3.0%Operating margin, Q2 FY2025, three months to 2025-03-30. operating income / revenueOperating income: $39.6m. XBRL concept us-gaap:OperatingIncomeLoss. 10-Q filed 2026-05-01, accession 0000831641-26-000011.Revenue: $1.32bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-05-01, accession 0000831641-26-000011.Report this figure12.0%Operating margin, Q3 FY2025, three months to 2025-06-29. operating income / revenueOperating income: $165.0m. XBRL concept us-gaap:OperatingIncomeLoss. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Revenue: $1.37bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Report this figure13.6%Operating margin, Q4 FY2025, three months to 2025-09-28. operating income / revenueOperating income: $181.3m. XBRL concept us-gaap:OperatingIncomeLoss. 10-K filed 2025-11-20, accession 0000831641-25-000032.Revenue: $1.33bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure11.6%Operating margin, Q1 FY2026, three months to 2025-12-28. operating income / revenueOperating income: $141.0m. XBRL concept us-gaap:OperatingIncomeLoss. 10-Q filed 2026-01-30, accession 0000831641-26-000005.Revenue: $1.21bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-01-30, accession 0000831641-26-000005.Report this figure10.8%Operating margin, Q2 FY2026, three months to 2026-03-29. operating income / revenueOperating income: $131.5m. XBRL concept us-gaap:OperatingIncomeLoss. 10-Q filed 2026-05-01, accession 0000831641-26-000011.Revenue: $1.22bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-05-01, accession 0000831641-26-000011.Report this figure12.1%Operating margin, Q3 FY2026, three months to 2026-06-28. operating income / revenueOperating income: $157.9m. XBRL concept us-gaap:OperatingIncomeLoss. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Revenue: $1.31bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Report this figure
Net margin%7.0%Net margin, Q4 FY2024, three months to 2024-09-29. net income / revenueNet income: $96.2m. XBRL concept us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic. 10-K filed 2025-11-20, accession 0000831641-25-000032.Revenue: $1.37bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure0.1%Net margin, Q1 FY2025, three months to 2024-12-29. net income / revenueNet income: $778.0k. XBRL concept us-gaap:ProfitLoss. 10-Q filed 2026-01-30, accession 0000831641-26-000005.Revenue: $1.42bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-01-30, accession 0000831641-26-000005.Report this figure0.4%Net margin, Q2 FY2025, three months to 2025-03-30. net income / revenueNet income: $5.4m. XBRL concept us-gaap:NetIncomeLoss. 10-Q filed 2025-05-08, accession 0000831641-25-000019.Revenue: $1.32bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-05-01, accession 0000831641-26-000011.Report this figure8.3%Net margin, Q3 FY2025, three months to 2025-06-29. net income / revenueNet income: $113.8m. XBRL concept us-gaap:NetIncomeLoss. 10-Q filed 2025-08-01, accession 0000831641-25-000023.Revenue: $1.37bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Report this figure9.6%Net margin, Q4 FY2025, three months to 2025-09-28. net income / revenueNet income: $127.7m. XBRL concept us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic. 10-K filed 2025-11-20, accession 0000831641-25-000032.Revenue: $1.33bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure8.7%Net margin, Q1 FY2026, three months to 2025-12-28. net income / revenueNet income: $105.2m. XBRL concept us-gaap:ProfitLoss. 10-Q filed 2026-01-30, accession 0000831641-26-000005.Revenue: $1.21bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-01-30, accession 0000831641-26-000005.Report this figure7.7%Net margin, Q2 FY2026, three months to 2026-03-29. net income / revenueNet income: $93.8m. XBRL concept us-gaap:ProfitLoss. 10-Q filed 2026-05-01, accession 0000831641-26-000011.Revenue: $1.22bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-05-01, accession 0000831641-26-000011.Report this figure8.4%Net margin, Q3 FY2026, three months to 2026-06-28. net income / revenueNet income: $109.8m. XBRL concept us-gaap:ProfitLoss. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Revenue: $1.31bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Report this figure
Diluted EPS$ per share0.35Diluted EPS, Q4 FY2024, three months to 2024-09-29$0.35 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure0.00Diluted EPS, Q1 FY2025, three months to 2024-12-29$0.00 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2026-01-30, accession 0000831641-26-000005.Report this figure0.02Diluted EPS, Q2 FY2025, three months to 2025-03-30$0.02 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2026-05-01, accession 0000831641-26-000011.Report this figure0.43Diluted EPS, Q3 FY2025, three months to 2025-06-29$0.43 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Report this figure0.48Diluted EPS, Q4 FY2025, three months to 2025-09-28$0.48 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure0.40Diluted EPS, Q1 FY2026, three months to 2025-12-28$0.40 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2026-01-30, accession 0000831641-26-000005.Report this figure0.36Diluted EPS, Q2 FY2026, three months to 2026-03-29$0.36 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2026-05-01, accession 0000831641-26-000011.Report this figure0.42Diluted EPS, Q3 FY2026, three months to 2026-06-28$0.42 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2026-07-31, accession 0000831641-26-000017.Report this figure
Free cash flow$m98.8Free cash flow, Q4 FY2024, three months to 2024-09-29. operating cash flow − capital expenditureOperating cash flow: $105.6m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-K filed 2025-11-20, accession 0000831641-25-000032. Derived: 12-month figure less the 9-month figure.Capital expenditure: $6.8m. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-K filed 2025-11-20, accession 0000831641-25-000032. Derived: 12-month figure less the 9-month figure.Report this figure9.6Free cash flow, Q1 FY2025, three months to 2024-12-29. operating cash flow − capital expenditureOperating cash flow: $13.1m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2026-01-30, accession 0000831641-26-000005.Capital expenditure: $3.4m. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-Q filed 2026-01-30, accession 0000831641-26-000005.Report this figure(11.4)Free cash flow, Q2 FY2025, three months to 2025-03-30. operating cash flow − capital expenditureOperating cash flow: −$5.8m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2026-05-01, accession 0000831641-26-000011. Derived: 6-month figure less the 3-month figure.Capital expenditure: $5.6m. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-Q filed 2026-05-01, accession 0000831641-26-000011. Derived: 6-month figure less the 3-month figure.Report this figure346Free cash flow, Q3 FY2025, three months to 2025-06-29. operating cash flow − capital expenditureOperating cash flow: $349.6m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2026-07-31, accession 0000831641-26-000017. Derived: 9-month figure less the 6-month figure.Capital expenditure: $3.5m. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-Q filed 2026-07-31, accession 0000831641-26-000017. Derived: 9-month figure less the 6-month figure.Report this figure94.7Free cash flow, Q4 FY2025, three months to 2025-09-28. operating cash flow − capital expenditureOperating cash flow: $100.8m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-K filed 2025-11-20, accession 0000831641-25-000032. Derived: 12-month figure less the 9-month figure.Capital expenditure: $6.1m. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-K filed 2025-11-20, accession 0000831641-25-000032. Derived: 12-month figure less the 9-month figure.Report this figure68.1Free cash flow, Q1 FY2026, three months to 2025-12-28. operating cash flow − capital expenditureOperating cash flow: $72.3m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2026-01-30, accession 0000831641-26-000005.Capital expenditure: $4.2m. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-Q filed 2026-01-30, accession 0000831641-26-000005.Report this figure159Free cash flow, Q2 FY2026, three months to 2026-03-29. operating cash flow − capital expenditureOperating cash flow: $165.3m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2026-05-01, accession 0000831641-26-000011. Derived: 6-month figure less the 3-month figure.Capital expenditure: $6.0m. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-Q filed 2026-05-01, accession 0000831641-26-000011. Derived: 6-month figure less the 3-month figure.Report this figure225Free cash flow, Q3 FY2026, three months to 2026-06-28. operating cash flow − capital expenditureOperating cash flow: $228.9m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2026-07-31, accession 0000831641-26-000017. Derived: 9-month figure less the 6-month figure.Capital expenditure: $3.8m. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-Q filed 2026-07-31, accession 0000831641-26-000017. Derived: 9-month figure less the 6-month figure.Report this figure

Focus or hover a figure to see its XBRL concept, period and filing; each links to that filing. A figure marked d is derived: a quarter computed from year-to-date figures, such as the fourth quarter as the fiscal year less the nine months before it. A ratio reads not reported when any input is missing.

Last five fiscal years

Revenue$5.44bnGross margin 17.7%
Diluted EPS$0.93, FY2025
Free cash flow$439.1m, FY2025
Tetra Tech Inc, key figures for the last five fiscal years
Line itemUnitFY20212021-10-03FY20222022-10-02FY20232023-10-01FY20242024-09-29FY20252025-09-28Shape over the periods
Revenue$m3,214Revenue, FY2021, twelve months to 2021-10-03$3.21bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2023-11-22, accession 0000831641-23-000082.Report this figure3,504Revenue, FY2022, twelve months to 2022-10-02$3.50bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2024-11-19, accession 0000831641-24-000063.Report this figure4,523Revenue, FY2023, twelve months to 2023-10-01$4.52bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure5,199Revenue, FY2024, twelve months to 2024-09-29$5.20bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure5,443Revenue, FY2025, twelve months to 2025-09-28$5.44bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure
Gross margin%15.5%Gross margin, FY2021, twelve months to 2021-10-03. gross profit / revenueGross profit: $498.4m. XBRL concept us-gaap:GrossProfit. 10-K filed 2023-11-22, accession 0000831641-23-000082.Revenue: $3.21bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2023-11-22, accession 0000831641-23-000082.Report this figure16.4%Gross margin, FY2022, twelve months to 2022-10-02. gross profit / revenueGross profit: $575.6m. XBRL concept us-gaap:GrossProfit. 10-K filed 2024-11-19, accession 0000831641-24-000063.Revenue: $3.50bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2024-11-19, accession 0000831641-24-000063.Report this figure16.0%Gross margin, FY2023, twelve months to 2023-10-01. gross profit / revenueGross profit: $725.0m. XBRL concept us-gaap:GrossProfit. 10-K filed 2025-11-20, accession 0000831641-25-000032.Revenue: $4.52bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure16.7%Gross margin, FY2024, twelve months to 2024-09-29. gross profit / revenueGross profit: $866.4m. XBRL concept us-gaap:GrossProfit. 10-K filed 2025-11-20, accession 0000831641-25-000032.Revenue: $5.20bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure17.7%Gross margin, FY2025, twelve months to 2025-09-28. gross profit / revenueGross profit: $961.3m. XBRL concept us-gaap:GrossProfit. 10-K filed 2025-11-20, accession 0000831641-25-000032.Revenue: $5.44bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure
Operating margin%8.7%Operating margin, FY2021, twelve months to 2021-10-03. operating income / revenueOperating income: $278.7m. XBRL concept us-gaap:OperatingIncomeLoss. 10-K filed 2023-11-22, accession 0000831641-23-000082.Revenue: $3.21bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2023-11-22, accession 0000831641-23-000082.Report this figure9.7%Operating margin, FY2022, twelve months to 2022-10-02. operating income / revenueOperating income: $340.4m. XBRL concept us-gaap:OperatingIncomeLoss. 10-K filed 2024-11-19, accession 0000831641-24-000063.Revenue: $3.50bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2024-11-19, accession 0000831641-24-000063.Report this figure7.9%Operating margin, FY2023, twelve months to 2023-10-01. operating income / revenueOperating income: $358.1m. XBRL concept us-gaap:OperatingIncomeLoss. 10-K filed 2025-11-20, accession 0000831641-25-000032.Revenue: $4.52bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure9.6%Operating margin, FY2024, twelve months to 2024-09-29. operating income / revenueOperating income: $500.7m. XBRL concept us-gaap:OperatingIncomeLoss. 10-K filed 2025-11-20, accession 0000831641-25-000032.Revenue: $5.20bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure7.5%Operating margin, FY2025, twelve months to 2025-09-28. operating income / revenueOperating income: $408.4m. XBRL concept us-gaap:OperatingIncomeLoss. 10-K filed 2025-11-20, accession 0000831641-25-000032.Revenue: $5.44bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure
Net margin%7.2%Net margin, FY2021, twelve months to 2021-10-03. net income / revenueNet income: $232.8m. XBRL concept us-gaap:ProfitLoss. 10-K filed 2023-11-22, accession 0000831641-23-000082.Revenue: $3.21bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2023-11-22, accession 0000831641-23-000082.Report this figure7.5%Net margin, FY2022, twelve months to 2022-10-02. net income / revenueNet income: $263.2m. XBRL concept us-gaap:ProfitLoss. 10-K filed 2024-11-19, accession 0000831641-24-000063.Revenue: $3.50bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2024-11-19, accession 0000831641-24-000063.Report this figure6.0%Net margin, FY2023, twelve months to 2023-10-01. net income / revenueNet income: $273.5m. XBRL concept us-gaap:ProfitLoss. 10-K filed 2025-11-20, accession 0000831641-25-000032.Revenue: $4.52bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure6.4%Net margin, FY2024, twelve months to 2024-09-29. net income / revenueNet income: $333.4m. XBRL concept us-gaap:ProfitLoss. 10-K filed 2025-11-20, accession 0000831641-25-000032.Revenue: $5.20bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure4.6%Net margin, FY2025, twelve months to 2025-09-28. net income / revenueNet income: $247.9m. XBRL concept us-gaap:ProfitLoss. 10-K filed 2025-11-20, accession 0000831641-25-000032.Revenue: $5.44bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure
Diluted EPS$ per share4.26Diluted EPS, FY2021, twelve months to 2021-10-03$4.26 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-K filed 2023-11-22, accession 0000831641-23-000082.Report this figure0.97Diluted EPS, FY2022, twelve months to 2022-10-02$0.97 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-K filed 2024-11-19, accession 0000831641-24-000063.Report this figure1.02Diluted EPS, FY2023, twelve months to 2023-10-01$1.02 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure1.23Diluted EPS, FY2024, twelve months to 2024-09-29$1.23 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure0.93Diluted EPS, FY2025, twelve months to 2025-09-28$0.93 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure
Free cash flow$m296Free cash flow, FY2021, twelve months to 2021-10-03. operating cash flow − capital expenditureOperating cash flow: $304.4m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-K filed 2023-11-22, accession 0000831641-23-000082.Capital expenditure: $8.6m. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-K filed 2023-11-22, accession 0000831641-23-000082.Report this figure326Free cash flow, FY2022, twelve months to 2022-10-02. operating cash flow − capital expenditureOperating cash flow: $336.2m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-K filed 2024-11-19, accession 0000831641-24-000063.Capital expenditure: $10.6m. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-K filed 2024-11-19, accession 0000831641-24-000063.Report this figure342Free cash flow, FY2023, twelve months to 2023-10-01. operating cash flow − capital expenditureOperating cash flow: $368.5m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-K filed 2025-11-20, accession 0000831641-25-000032.Capital expenditure: $26.9m. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure341Free cash flow, FY2024, twelve months to 2024-09-29. operating cash flow − capital expenditureOperating cash flow: $358.7m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-K filed 2025-11-20, accession 0000831641-25-000032.Capital expenditure: $18.1m. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure439Free cash flow, FY2025, twelve months to 2025-09-28. operating cash flow − capital expenditureOperating cash flow: $457.7m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-K filed 2025-11-20, accession 0000831641-25-000032.Capital expenditure: $18.6m. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-K filed 2025-11-20, accession 0000831641-25-000032.Report this figure

Focus or hover a figure to see its XBRL concept, period and filing; each links to that filing. A figure marked d is derived: a quarter computed from year-to-date figures, such as the fourth quarter as the fiscal year less the nine months before it. A ratio reads not reported when any input is missing.

Insider purchases and sales

All insider transactions

The last 20 open-market transactions reported on Form 4 (codes P and S). The reported price is the price per share the insider stated on the form: filing data, not a market price.

No open-market purchases or sales by insiders are in coverage from Nov 2024 to Oct 2026.

No open-market purchases or sales by insiders are in coverage for this company.

Funds that report holding it

All funds

From each manager's latest Form 13F, largest reported value first. Reported value is as filed at the quarter end: filing data, not a price. A put or call is an option position, not shares held.

Funds that report holding Tetra Tech Inc
FundQuarter endedReported valueSharesPut or callChange on the quarter before
BlackRock, Inc.2026-06-30$828.4m28,675,276Added+1,884,870
VANGUARD PORTFOLIO MANAGEMENT LLC2026-06-30$360.2m12,467,970Reduced−175,124
VANGUARD CAPITAL MANAGEMENT LLC2026-06-30$338.8m11,725,738Added+16,587
Capital International Investors2026-06-30$336.6m11,651,238Added+265,971
STATE STREET CORP2026-06-30$282.0m9,761,640Added+125,728
FMR LLC2026-06-30$253.3m8,768,611Added+8,440,359
GEODE CAPITAL MANAGEMENT, LLC2026-06-30$197.4m6,833,071Added+1,615,623
FIL Ltd2026-06-30$158.1m5,471,691Added+639,019
Amundi2026-06-30$147.3m5,098,519Added+349,272
FULLER & THALER ASSET MANAGEMENT, INC.2026-06-30$142.2m4,921,268Added+1,606,825

Recent filings

All 1,528 filings

Reports and events: 10-K, 10-Q, 8-K, proxy statements and ownership schedules.

Tetra Tech Inc, recent filings
FiledFormWhat it isAccession number
2026-09-1009:00 ET8-K8.01 Other events; 9.01 Financial statements and exhibits0001104659-26-106564
2026-07-3116:34 ET10-QQuarterly reportPeriod 2026-06-280000831641-26-000017
2026-07-2916:58 ET8-K2.02 Results of operations; 8.01 Other events; 9.01 Financial statements and exhibits0001104659-26-088213
2026-05-0116:33 ET10-QQuarterly reportPeriod 2026-03-290000831641-26-000011
2026-04-2916:06 ET8-K2.02 Results of operations; 8.01 Other events; 9.01 Financial statements and exhibits0001104659-26-051486
2026-03-2616:05 ET8-K5.02 Departure or appointment of officers or directors; 8.01 Other events; 9.01 Financial statements and exhibits0001104659-26-035179
2026-02-2017:00 ET8-K5.02 Departure or appointment of officers or directors; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits0001104659-26-018205
2026-01-3016:02 ET10-QQuarterly reportPeriod 2025-12-280000831641-26-000005
2026-01-2817:15 ET8-K2.02 Results of operations; 8.01 Other events; 9.01 Financial statements and exhibits0001104659-26-007481
2026-01-0916:04 ETDEF 14AProxy statementPeriod 2026-02-190001104659-26-002458

Latest annual report

Form 10-K for the fiscal year ended Sep 28, 2025Filed Nov 20, 2025. Its page lists the documents and the extracted sections, such as Business and Risk factors.

Forecast league

Q4 FY2026, the quarter ended 2026-09-28, is open for forecasts until the first results filing for it is accepted by EDGAR. Results are due by [object Promise].Forecast this quarter

About the filer

CIK
831641
Tickers
TTEK
Exchange
Nasdaq
SIC code
8711 Services-Engineering Services
Sector
Industrials
Fiscal year ends
Sep 27
Incorporated in
DE
Filer category
Large accelerated filer

Source: SEC EDGAR, XBRL company facts, the filing index and Forms 4. Last ingested by Listed: Oct 24, 2026, 15:25 ET. Listed shows no prices and gives no investment advice.