# Tetra Tech Inc: overview

TTEK · Nasdaq · CIK 831641 · [Industrials](/sectors/industrials.md) · fiscal year ends Sep 27

Pages: [Overview](/companies/ttek.md) · [Financials](/companies/ttek/financials.md) · [Filings](/companies/ttek/filings.md) · [Insiders](/companies/ttek/insiders.md)

Latest reported revenue: [$1.31bn](/filings/0000831641-26-000017.md) for Q3 FY2026, three months to 2026-06-28, from the 10-Q filed Jul 31, 2026 (XBRL us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax, accession 0000831641-26-000017).

## Last eight quarters

| Line item | Unit | Q4 FY2024 (2024-09-29) | Q1 FY2025 (2024-12-29) | Q2 FY2025 (2025-03-30) | Q3 FY2025 (2025-06-29) | Q4 FY2025 (2025-09-28) | Q1 FY2026 (2025-12-28) | Q2 FY2026 (2026-03-29) | Q3 FY2026 (2026-06-28) |
| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: |
| Revenue | $m | [1,374](/filings/0000831641-25-000032.md) | [1,421](/filings/0000831641-26-000005.md) | [1,322](/filings/0000831641-26-000011.md) | [1,370](/filings/0000831641-26-000017.md) | [1,330](/filings/0000831641-25-000032.md) | [1,211](/filings/0000831641-26-000005.md) | [1,220](/filings/0000831641-26-000011.md) | [1,309](/filings/0000831641-26-000017.md) |
| Gross margin | % | [17.8% d](/filings/0000831641-25-000032.md) | [15.6%](/filings/0000831641-26-000005.md) | [16.2%](/filings/0000831641-26-000011.md) | [18.4%](/filings/0000831641-26-000017.md) | [20.6% d](/filings/0000831641-25-000032.md) | [18.2%](/filings/0000831641-26-000005.md) | [17.5%](/filings/0000831641-26-000011.md) | [18.6%](/filings/0000831641-26-000017.md) |
| Operating margin | % | [10.4%](/filings/0000831641-25-000032.md) | [1.6%](/filings/0000831641-26-000005.md) | [3.0%](/filings/0000831641-26-000011.md) | [12.0%](/filings/0000831641-26-000017.md) | [13.6%](/filings/0000831641-25-000032.md) | [11.6%](/filings/0000831641-26-000005.md) | [10.8%](/filings/0000831641-26-000011.md) | [12.1%](/filings/0000831641-26-000017.md) |
| Net margin | % | [7.0%](/filings/0000831641-25-000032.md) | [0.1%](/filings/0000831641-26-000005.md) | [0.4%](/filings/0000831641-25-000019.md) | [8.3%](/filings/0000831641-25-000023.md) | [9.6%](/filings/0000831641-25-000032.md) | [8.7%](/filings/0000831641-26-000005.md) | [7.7%](/filings/0000831641-26-000011.md) | [8.4%](/filings/0000831641-26-000017.md) |
| Diluted EPS | $ per share | [0.35](/filings/0000831641-25-000032.md) | [0.00](/filings/0000831641-26-000005.md) | [0.02](/filings/0000831641-26-000011.md) | [0.43](/filings/0000831641-26-000017.md) | [0.48](/filings/0000831641-25-000032.md) | [0.40](/filings/0000831641-26-000005.md) | [0.36](/filings/0000831641-26-000011.md) | [0.42](/filings/0000831641-26-000017.md) |
| Free cash flow | $m | [98.8 d](/filings/0000831641-25-000032.md) | [9.6](/filings/0000831641-26-000005.md) | [(11.4) d](/filings/0000831641-26-000011.md) | [346 d](/filings/0000831641-26-000017.md) | [94.7 d](/filings/0000831641-25-000032.md) | [68.1](/filings/0000831641-26-000005.md) | [159 d](/filings/0000831641-26-000011.md) | [225 d](/filings/0000831641-26-000017.md) |

- Revenue. XBRL Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax.
- Gross margin (gross profit / revenue). XBRL Gross profit: us-gaap:GrossProfit; Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. Derived values: 12-month figure less the 9-month figure.
- Operating margin (operating income / revenue). XBRL Operating income: us-gaap:OperatingIncomeLoss; Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax.
- Net margin (net income / revenue). XBRL Net income: us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic; Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax; Net income: us-gaap:ProfitLoss; Net income: us-gaap:NetIncomeLoss.
- Diluted EPS. XBRL Diluted EPS: us-gaap:EarningsPerShareDiluted.
- Free cash flow (operating cash flow − capital expenditure). XBRL Operating cash flow: us-gaap:NetCashProvidedByUsedInOperatingActivities; Capital expenditure: us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. Derived values: 12-month figure less the 9-month figure; 6-month figure less the 3-month figure; 9-month figure less the 6-month figure.

## Last five fiscal years

| Line item | Unit | FY2021 (2021-10-03) | FY2022 (2022-10-02) | FY2023 (2023-10-01) | FY2024 (2024-09-29) | FY2025 (2025-09-28) |
| --- | --- | ---: | ---: | ---: | ---: | ---: |
| Revenue | $m | [3,214](/filings/0000831641-23-000082.md) | [3,504](/filings/0000831641-24-000063.md) | [4,523](/filings/0000831641-25-000032.md) | [5,199](/filings/0000831641-25-000032.md) | [5,443](/filings/0000831641-25-000032.md) |
| Gross margin | % | [15.5%](/filings/0000831641-23-000082.md) | [16.4%](/filings/0000831641-24-000063.md) | [16.0%](/filings/0000831641-25-000032.md) | [16.7%](/filings/0000831641-25-000032.md) | [17.7%](/filings/0000831641-25-000032.md) |
| Operating margin | % | [8.7%](/filings/0000831641-23-000082.md) | [9.7%](/filings/0000831641-24-000063.md) | [7.9%](/filings/0000831641-25-000032.md) | [9.6%](/filings/0000831641-25-000032.md) | [7.5%](/filings/0000831641-25-000032.md) |
| Net margin | % | [7.2%](/filings/0000831641-23-000082.md) | [7.5%](/filings/0000831641-24-000063.md) | [6.0%](/filings/0000831641-25-000032.md) | [6.4%](/filings/0000831641-25-000032.md) | [4.6%](/filings/0000831641-25-000032.md) |
| Diluted EPS | $ per share | [4.26](/filings/0000831641-23-000082.md) | [0.97](/filings/0000831641-24-000063.md) | [1.02](/filings/0000831641-25-000032.md) | [1.23](/filings/0000831641-25-000032.md) | [0.93](/filings/0000831641-25-000032.md) |
| Free cash flow | $m | [296](/filings/0000831641-23-000082.md) | [326](/filings/0000831641-24-000063.md) | [342](/filings/0000831641-25-000032.md) | [341](/filings/0000831641-25-000032.md) | [439](/filings/0000831641-25-000032.md) |

- Revenue. XBRL Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax.
- Gross margin (gross profit / revenue). XBRL Gross profit: us-gaap:GrossProfit; Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax.
- Operating margin (operating income / revenue). XBRL Operating income: us-gaap:OperatingIncomeLoss; Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax.
- Net margin (net income / revenue). XBRL Net income: us-gaap:ProfitLoss; Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax.
- Diluted EPS. XBRL Diluted EPS: us-gaap:EarningsPerShareDiluted.
- Free cash flow (operating cash flow − capital expenditure). XBRL Operating cash flow: us-gaap:NetCashProvidedByUsedInOperatingActivities; Capital expenditure: us-gaap:PaymentsToAcquirePropertyPlantAndEquipment.

Each value links to the filing it came from. d marks a derived value. A ratio is not reported when any input is missing.

## Insider purchases and sales

The last 20 open-market transactions on Form 4 (codes P and S). Reported price is as stated on the form, not a market price. [All insider transactions](/companies/ttek/insiders.md)

None in coverage.

## Funds that report holding it

From each manager’s latest Form 13F, largest reported value first. Reported value is as filed: filing data, not a price. [All funds](/funds.md)

| Fund | Quarter ended | Reported value | Shares | Put or call | Change on the quarter before |
| --- | --- | ---: | ---: | --- | --- |
| [BlackRock, Inc.](/funds/2012383.md) | 2026-06-30 | $828.4m | 28,675,276 |  | Added +1,884,870 |
| [VANGUARD PORTFOLIO MANAGEMENT LLC](/funds/2100121.md) | 2026-06-30 | $360.2m | 12,467,970 |  | Reduced −175,124 |
| [VANGUARD CAPITAL MANAGEMENT LLC](/funds/2100119.md) | 2026-06-30 | $338.8m | 11,725,738 |  | Added +16,587 |
| [Capital International Investors](/funds/1562230.md) | 2026-06-30 | $336.6m | 11,651,238 |  | Added +265,971 |
| [STATE STREET CORP](/funds/93751.md) | 2026-06-30 | $282.0m | 9,761,640 |  | Added +125,728 |
| [FMR LLC](/funds/315066.md) | 2026-06-30 | $253.3m | 8,768,611 |  | Added +8,440,359 |
| [GEODE CAPITAL MANAGEMENT, LLC](/funds/1214717.md) | 2026-06-30 | $197.4m | 6,833,071 |  | Added +1,615,623 |
| [FIL Ltd](/funds/318989.md) | 2026-06-30 | $158.1m | 5,471,691 |  | Added +639,019 |
| [Amundi](/funds/1330387.md) | 2026-06-30 | $147.3m | 5,098,519 |  | Added +349,272 |
| [FULLER & THALER ASSET MANAGEMENT, INC.](/funds/1082327.md) | 2026-06-30 | $142.2m | 4,921,268 |  | Added +1,606,825 |

## Recent filings

[All 1,528 filings](/companies/ttek/filings.md)

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-09-10 | 09:00 ET | [8-K](/filings/0001104659-26-106564.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-26-106564 |
| 2026-07-31 | 16:34 ET | [10-Q](/filings/0000831641-26-000017.md) | Quarterly report, period 2026-06-28 | 0000831641-26-000017 |
| 2026-07-29 | 16:58 ET | [8-K](/filings/0001104659-26-088213.md) | 2.02 Results of operations; 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-26-088213 |
| 2026-05-01 | 16:33 ET | [10-Q](/filings/0000831641-26-000011.md) | Quarterly report, period 2026-03-29 | 0000831641-26-000011 |
| 2026-04-29 | 16:06 ET | [8-K](/filings/0001104659-26-051486.md) | 2.02 Results of operations; 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-26-051486 |
| 2026-03-26 | 16:05 ET | [8-K](/filings/0001104659-26-035179.md) | 5.02 Departure or appointment of officers or directors; 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-26-035179 |
| 2026-02-20 | 17:00 ET | [8-K](/filings/0001104659-26-018205.md) | 5.02 Departure or appointment of officers or directors; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001104659-26-018205 |
| 2026-01-30 | 16:02 ET | [10-Q](/filings/0000831641-26-000005.md) | Quarterly report, period 2025-12-28 | 0000831641-26-000005 |
| 2026-01-28 | 17:15 ET | [8-K](/filings/0001104659-26-007481.md) | 2.02 Results of operations; 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-26-007481 |
| 2026-01-09 | 16:04 ET | [DEF 14A](/filings/0001104659-26-002458.md) | Proxy statement, period 2026-02-19 | 0001104659-26-002458 |

## Latest annual report

[Form 10-K for the fiscal year ended Sep 28, 2025](/filings/0000831641-25-000032.md), filed Nov 20, 2025.

## 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](/leagues/2026q3/targets/2596cbe0-0153-4563-bbcc-25c21a5a7f02)

## About the filer

- CIK: 831641
- Tickers: TTEK
- Exchange: Nasdaq
- SIC code: 8711 Services-Engineering Services
- State of incorporation: 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. No prices; not investment advice.