Tetra Tech Inc SEC filings TTEK
Tetra Tech Inc has 1,000 filings in SEC EDGAR's recent list, going back to Jan 8, 2015. Its latest annual report, Form ARS, was filed on Jan 9, 2026 for the period ended Sep 28, 2025. The latest quarterly report (Form 10-Q) was filed on Jul 31, 2026, covering the quarter ended Jun 28, 2026. The most recent current report (Form 8-K) was filed on Sep 10, 2026 (other events). The company's fiscal year ends on September 27.
| Form | Description | Filed | Period |
|---|---|---|---|
| 8-K |
Current report
Other events
|
Sep 10, 2026 | Sep 10, 2026 |
| 8-K |
Current report
Results of operations, Other events
|
Jul 29, 2026 | Jul 29, 2026 |
| 8-K |
Current report
Results of operations, Other events
|
Apr 29, 2026 | Apr 29, 2026 |
| 8-K |
Current report
Officer or director change, Other events
|
Mar 26, 2026 | Mar 26, 2026 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Feb 20, 2026 | Feb 19, 2026 |
| 8-K |
Current report
Results of operations, Other events
|
Jan 28, 2026 | Jan 28, 2026 |
| 8-K |
Current report
Officer or director change, Other events
|
Jan 6, 2026 | Jan 6, 2026 |
| 8-K |
Current report
Officer or director change, Other events
|
Dec 22, 2025 | Dec 22, 2025 |
| 8-K |
Current report
Results of operations, Other events
|
Nov 12, 2025 | Nov 12, 2025 |
| 8-K |
Current report
Officer or director change, Other events
|
Oct 7, 2025 | Oct 7, 2025 |
| 8-K |
Current report
Results of operations, Other events
|
Jul 30, 2025 | Jul 30, 2025 |
| 8-K |
Current report
Material agreement, Results of operations, New debt, Change to shareholder rights, Other events
|
May 7, 2025 | May 5, 2025 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Feb 28, 2025 | Feb 24, 2025 |
| 8-K |
Current report
Results of operations, Other events
|
Jan 30, 2025 | Jan 29, 2025 |
| 8-K |
Current report
Other events
|
Jan 17, 2025 | Jan 17, 2025 |
| 8-K |
Current report
Results of operations, Other events
|
Nov 13, 2024 | Nov 13, 2024 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Sep 6, 2024 | Sep 6, 2024 |
| 8-K |
Current report
Officer or director change, Other events
|
Aug 2, 2024 | Jul 29, 2024 |
| 8-K |
Current report
Results of operations, Other events
|
Jul 31, 2024 | Jul 31, 2024 |
| 8-K |
Current report
Officer or director change
|
May 24, 2024 | May 21, 2024 |
| 8-K |
Current report
Results of operations, Other events
|
May 1, 2024 | May 1, 2024 |
| 8-K |
Current report
Shareholder vote results
|
Mar 1, 2024 | Feb 29, 2024 |
| 8-K |
Current report
Results of operations, Other events
|
Jan 31, 2024 | Jan 31, 2024 |
| 8-K/A |
Amended current report
Shareholder vote results
|
Nov 15, 2023 | Feb 28, 2023 |
| 8-K |
Current report
Results of operations, Other events
|
Nov 15, 2023 | Nov 15, 2023 |
| 8-K |
Current report
Material agreement, New debt, Unregistered share sale, Other events
|
Aug 22, 2023 | Aug 17, 2023 |
| 8-K |
Current report
Results of operations, Other events
|
Aug 9, 2023 | Aug 9, 2023 |
| 8-K |
Current report
Results of operations, Other events
|
May 10, 2023 | May 10, 2023 |
| 8-K |
Current report
Officer or director change
|
May 8, 2023 | May 2, 2023 |
| 8-K/A |
Amended current report
Acquisition or sale of assets
|
Apr 10, 2023 | Jan 19, 2023 |
| 8-K |
Current report
Shareholder vote results
|
Mar 3, 2023 | Feb 28, 2023 |
| 8-K |
Current report
Results of operations, Other events
|
Feb 1, 2023 | Feb 1, 2023 |
| 8-K |
Current report
Acquisition or sale of assets, Regulation FD disclosure
|
Jan 24, 2023 | Jan 19, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Dec 12, 2022 | Dec 12, 2022 |
| 8-K |
Current report
Officer or director change, Other events
|
Nov 15, 2022 | Nov 11, 2022 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Nov 10, 2022 | Nov 7, 2022 |
| 8-K |
Current report
Results of operations, Other events
|
Nov 9, 2022 | Nov 9, 2022 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 3, 2022 | Nov 3, 2022 |
| 8-K |
Current report
Material agreement, Agreement ended, Change to shareholder rights, Other events
|
Oct 28, 2022 | Oct 26, 2022 |
| 8-K |
Current report
Regulation FD disclosure
|
Oct 12, 2022 | Oct 11, 2022 |
| 8-K |
Current report
Material agreement, Change to shareholder rights, Other events
|
Oct 11, 2022 | Oct 7, 2022 |
| 8-K |
Current report
Material agreement, New debt, Other events
|
Sep 26, 2022 | Sep 23, 2022 |
| 8-K |
Current report
Results of operations, Other events
|
Aug 3, 2022 | Aug 3, 2022 |
| 8-K |
Current report
Officer or director change, Other events
|
Aug 2, 2022 | Aug 2, 2022 |
| 8-K |
Current report
Results of operations, Other events
|
May 4, 2022 | May 4, 2022 |
| 8-K |
Current report
Shareholder vote results
|
Mar 4, 2022 | Mar 1, 2022 |
| 8-K |
Current report
Officer or director change, Other events
|
Feb 22, 2022 | Feb 22, 2022 |
| 8-K |
Current report
Material agreement, Change to shareholder rights, Other events
|
Feb 22, 2022 | Feb 18, 2022 |
| 8-K |
Current report
Results of operations, Other events
|
Feb 2, 2022 | Feb 2, 2022 |
| 8-K |
Current report
Results of operations, Other events
|
Nov 17, 2021 | Nov 17, 2021 |
| 8-K |
Current report
Other events
|
Oct 7, 2021 | Oct 7, 2021 |
| 8-K |
Current report
Results of operations, Other events
|
Jul 28, 2021 | Jul 28, 2021 |
| 8-K |
Current report
Results of operations, Other events
|
Apr 28, 2021 | Apr 28, 2021 |
| 8-K |
Current report
Shareholder vote results
|
Feb 25, 2021 | Feb 24, 2021 |
| 8-K |
Current report
Results of operations, Other events
|
Jan 27, 2021 | Jan 27, 2021 |
| 8-K |
Current report
Results of operations, Other events
|
Nov 12, 2020 | Nov 11, 2020 |
| 8-K |
Current report
Results of operations, Other events
|
Jul 29, 2020 | Jul 29, 2020 |
| 8-K |
Current report
Results of operations
|
Jun 9, 2020 | Jun 9, 2020 |
| 8-K |
Current report
Results of operations, Other events
|
Apr 29, 2020 | Apr 29, 2020 |
| 8-K |
Current report
Shareholder vote results
|
Feb 27, 2020 | Feb 26, 2020 |
| 8-K |
Current report
Results of operations, Other events
|
Jan 29, 2020 | Jan 29, 2020 |
| 8-K |
Current report
Results of operations, Other events
|
Nov 13, 2019 | Nov 13, 2019 |
| 8-K |
Current report
Officer or director change, Other events
|
Oct 2, 2019 | Sep 30, 2019 |
| 8-K |
Current report
Results of operations, Other events
|
Jul 31, 2019 | Jul 31, 2019 |
| 8-K |
Current report
Results of operations, Other events
|
May 1, 2019 | May 1, 2019 |
| 8-K |
Current report
Shareholder vote results
|
Mar 1, 2019 | Feb 28, 2019 |
| 8-K |
Current report
Results of operations, Other events
|
Jan 30, 2019 | Jan 30, 2019 |
| 8-K |
Current report
Results of operations, Officer or director change, Other events
|
Nov 7, 2018 | Nov 7, 2018 |
| 8-K |
Current report
Material agreement, Results of operations, Change to shareholder rights, Officer or director change, Other events
|
Aug 1, 2018 | Jul 30, 2018 |
| 8-K |
Current report
Results of operations, Other events
|
May 2, 2018 | May 2, 2018 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Mar 9, 2018 | Mar 8, 2018 |
| 8-K |
Current report
Results of operations, Other events
|
Jan 31, 2018 | Jan 31, 2018 |
| 8-K |
Current report
Officer or director change, Other events
|
Jan 22, 2018 | Jan 22, 2018 |
| 8-K |
Current report
Results of operations, Officer or director change, Other events
|
Nov 9, 2017 | Nov 8, 2017 |
| 8-K |
Current report
Results of operations, Other events
|
Aug 3, 2017 | Aug 2, 2017 |
| 8-K |
Current report
Results of operations, Other events
|
May 4, 2017 | May 3, 2017 |
| 8-K |
Current report
Shareholder vote results
|
Mar 3, 2017 | Mar 2, 2017 |
| 8-K |
Current report
Results of operations, Other events
|
Feb 2, 2017 | Feb 1, 2017 |
| 8-K |
Current report
Results of operations, Officer or director change, Other events
|
Nov 10, 2016 | Nov 9, 2016 |
| 8-K |
Current report
Results of operations, Other events
|
Jul 28, 2016 | Jul 27, 2016 |
| 8-K |
Current report
Results of operations, Other events
|
Apr 28, 2016 | Apr 27, 2016 |
| 8-K |
Current report
Shareholder vote results
|
Mar 4, 2016 | Mar 3, 2016 |
| 8-K |
Current report
Results of operations, Other events
|
Jan 28, 2016 | Jan 27, 2016 |
| 8-K |
Current report
Other events
|
Jan 19, 2016 | Jan 19, 2016 |
| 8-K |
Current report
Results of operations, Other events
|
Nov 12, 2015 | Nov 11, 2015 |
| 8-K |
Current report
Other events
|
Oct 14, 2015 | Oct 14, 2015 |
| 8-K |
Current report
Results of operations, Other events
|
Jul 30, 2015 | Jul 29, 2015 |
| 8-K |
Current report
Material agreement
|
Jun 2, 2015 | May 29, 2015 |
| 8-K |
Current report
Officer or director change
|
May 13, 2015 | May 13, 2015 |
| 8-K |
Current report
Results of operations, Other events
|
Apr 30, 2015 | Apr 29, 2015 |
| 8-K |
Current report
Officer or director change
|
Apr 9, 2015 | Apr 8, 2015 |
| 8-K |
Current report
Shareholder vote results
|
Mar 6, 2015 | Mar 5, 2015 |
| 8-K |
Current report
Results of operations, Other events
|
Jan 29, 2015 | Jan 28, 2015 |
Showing 93 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Services-Engineering Services (SIC 8711)
- Listed as
- TTEK (Nasdaq)
- Fiscal year ends
- September 27
- Incorporated in
- DE
- Headquarters
- Pasadena, CA
- SEC filer status
- Large accelerated filer
- SEC CIK
- 831641
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.