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Tetra Tech Inc SEC Filings
What Tetra Tech Inc has told the SEC happened, by the 8-K items and forms it filed under: when it reported results, who joined or left, what it bought or sold, and whether its auditor or its accounts ever changed.
TTEK overview →Filings on file
112
since Nov 10, 2016
Warning signs
0
none filed
Last results
Jul 29, 2026
8-K item 2.02
Industry
Services-Engineering Services
SIC 8711
Newest first
Each label is a form type or an 8-K item as filed; each row links to the filing.
| Filed | What it reports | Document |
|---|---|---|
| Jul 31, 2026 | Quarterly report 10-Q | Read ↗ |
| Jul 29, 2026 | Results announced 8-K | Read ↗ |
| May 1, 2026 | Quarterly report 10-Q | Read ↗ |
| Apr 29, 2026 | Results announced 8-K | Read ↗ |
| Mar 26, 2026 | Executive or director change 8-K | Read ↗ |
| Feb 20, 2026 | Executive or director changeShareholder vote 8-K | Read ↗ |
| Jan 30, 2026 | Quarterly report 10-Q | Read ↗ |
| Jan 28, 2026 | Results announced 8-K | Read ↗ |
| Jan 6, 2026 | Executive or director change 8-K | Read ↗ |
| Dec 22, 2025 | Executive or director change 8-K | Read ↗ |
| Nov 20, 2025 | Annual report 10-K | Read ↗ |
| Nov 12, 2025 | Results announced 8-K | Read ↗ |
| Oct 7, 2025 | Executive or director change 8-K | Read ↗ |
| Aug 1, 2025 | Quarterly report 10-Q | Read ↗ |
| Jul 30, 2025 | Results announced 8-K | Read ↗ |
| May 8, 2025 | Quarterly report 10-Q | Read ↗ |
| May 7, 2025 | Results announcedMaterial agreementNew debt 8-K | Read ↗ |
| Feb 28, 2025 | Executive or director changeShareholder vote 8-K | Read ↗ |
| Jan 31, 2025 | Quarterly report 10-Q | Read ↗ |
| Jan 30, 2025 | Results announced 8-K | Read ↗ |
| Nov 19, 2024 | Annual report 10-K | Read ↗ |
| Nov 13, 2024 | Results announced 8-K | Read ↗ |
| Aug 2, 2024 | Executive or director change 8-K | Read ↗ |
| Aug 2, 2024 | Quarterly report 10-Q | Read ↗ |
| Jul 31, 2024 | Results announced 8-K | Read ↗ |
| May 24, 2024 | Executive or director change 8-K | Read ↗ |
| May 3, 2024 | Quarterly report 10-Q | Read ↗ |
| May 1, 2024 | Results announced 8-K | Read ↗ |
| Mar 1, 2024 | Shareholder vote 8-K | Read ↗ |
| Feb 2, 2024 | Quarterly report 10-Q | Read ↗ |
| Jan 31, 2024 | Results announced 8-K | Read ↗ |
| Nov 22, 2023 | Annual report 10-K | Read ↗ |
| Nov 15, 2023 | Shareholder vote 8-K/A | Read ↗ |
| Nov 15, 2023 | Results announced 8-K | Read ↗ |
| Aug 22, 2023 | Material agreementNew debtUnregistered share sale 8-K | Read ↗ |
| Aug 15, 2023 | Annual report 10-K/A | Read ↗ |
| Aug 10, 2023 | Quarterly report 10-Q | Read ↗ |
| Aug 9, 2023 | Results announced 8-K | Read ↗ |
| May 11, 2023 | Quarterly report 10-Q | Read ↗ |
| May 10, 2023 | Results announced 8-K | Read ↗ |
| May 8, 2023 | Executive or director change 8-K | Read ↗ |
| Apr 10, 2023 | Acquisition or sale completed 8-K/A | Read ↗ |
| Mar 3, 2023 | Shareholder vote 8-K | Read ↗ |
| Feb 3, 2023 | Quarterly report 10-Q | Read ↗ |
| Feb 1, 2023 | Results announced 8-K | Read ↗ |
| Jan 24, 2023 | Acquisition or sale completed 8-K | Read ↗ |
| Nov 25, 2022 | Annual report 10-K | Read ↗ |
| Nov 15, 2022 | Executive or director change 8-K | Read ↗ |
| Nov 9, 2022 | Results announced 8-K | Read ↗ |
| Oct 28, 2022 | Material agreement 8-K | Read ↗ |
| Oct 11, 2022 | Material agreement 8-K | Read ↗ |
| Sep 26, 2022 | Material agreementNew debt 8-K | Read ↗ |
| Aug 5, 2022 | Quarterly report 10-Q | Read ↗ |
| Aug 3, 2022 | Results announced 8-K | Read ↗ |
| Aug 2, 2022 | Executive or director change 8-K | Read ↗ |
| May 6, 2022 | Quarterly report 10-Q | Read ↗ |
| May 4, 2022 | Results announced 8-K | Read ↗ |
| Mar 4, 2022 | Shareholder vote 8-K | Read ↗ |
| Feb 22, 2022 | Executive or director change 8-K | Read ↗ |
| Feb 22, 2022 | Material agreement 8-K | Read ↗ |
| Feb 4, 2022 | Quarterly report 10-Q | Read ↗ |
| Feb 2, 2022 | Results announced 8-K | Read ↗ |
| Nov 24, 2021 | Annual report 10-K | Read ↗ |
| Nov 17, 2021 | Results announced 8-K | Read ↗ |
| Jul 30, 2021 | Quarterly report 10-Q | Read ↗ |
| Jul 28, 2021 | Results announced 8-K | Read ↗ |
| Apr 30, 2021 | Quarterly report 10-Q | Read ↗ |
| Apr 28, 2021 | Results announced 8-K | Read ↗ |
| Feb 25, 2021 | Shareholder vote 8-K | Read ↗ |
| Jan 29, 2021 | Quarterly report 10-Q | Read ↗ |
| Jan 27, 2021 | Results announced 8-K | Read ↗ |
| Nov 23, 2020 | Annual report 10-K | Read ↗ |
| Nov 12, 2020 | Results announced 8-K | Read ↗ |
| Jul 31, 2020 | Quarterly report 10-Q | Read ↗ |
| Jul 29, 2020 | Results announced 8-K | Read ↗ |
| Jun 9, 2020 | Results announced 8-K | Read ↗ |
| May 1, 2020 | Quarterly report 10-Q | Read ↗ |
| Apr 29, 2020 | Results announced 8-K | Read ↗ |
| Feb 27, 2020 | Shareholder vote 8-K | Read ↗ |
| Jan 31, 2020 | Quarterly report 10-Q | Read ↗ |
| Jan 29, 2020 | Results announced 8-K | Read ↗ |
| Nov 29, 2019 | Annual report 10-K | Read ↗ |
| Nov 13, 2019 | Results announced 8-K | Read ↗ |
| Oct 2, 2019 | Executive or director change 8-K | Read ↗ |
| Aug 2, 2019 | Quarterly report 10-Q | Read ↗ |
| Jul 31, 2019 | Results announced 8-K | Read ↗ |
| May 3, 2019 | Quarterly report 10-Q | Read ↗ |
| May 1, 2019 | Results announced 8-K | Read ↗ |
| Mar 1, 2019 | Shareholder vote 8-K | Read ↗ |
| Feb 1, 2019 | Quarterly report 10-Q | Read ↗ |
| Jan 30, 2019 | Results announced 8-K | Read ↗ |
| Nov 16, 2018 | Annual report 10-K | Read ↗ |
| Nov 7, 2018 | Executive or director changeResults announced 8-K | Read ↗ |
| Aug 3, 2018 | Quarterly report 10-Q | Read ↗ |
| Aug 1, 2018 | Executive or director changeResults announcedMaterial agreement 8-K | Read ↗ |
| May 4, 2018 | Quarterly report 10-Q | Read ↗ |
| May 2, 2018 | Results announced 8-K | Read ↗ |
| Mar 9, 2018 | Executive or director changeShareholder vote 8-K | Read ↗ |
| Feb 1, 2018 | Quarterly report 10-Q | Read ↗ |
| Jan 31, 2018 | Results announced 8-K | Read ↗ |
| Jan 22, 2018 | Executive or director change 8-K | Read ↗ |
| Nov 20, 2017 | Annual report 10-K | Read ↗ |
| Nov 9, 2017 | Executive or director changeResults announced 8-K | Read ↗ |
| Aug 4, 2017 | Quarterly report 10-Q | Read ↗ |
| Aug 3, 2017 | Results announced 8-K | Read ↗ |
| May 5, 2017 | Quarterly report 10-Q | Read ↗ |
| May 4, 2017 | Results announced 8-K | Read ↗ |
| Mar 3, 2017 | Shareholder vote 8-K | Read ↗ |
| Feb 3, 2017 | Quarterly report 10-Q | Read ↗ |
| Feb 2, 2017 | Results announced 8-K | Read ↗ |
| Nov 22, 2016 | Annual report 10-K | Read ↗ |
| Nov 10, 2016 | Executive or director changeResults announced 8-K | Read ↗ |
Source: Tetra Tech Inc's EDGAR filing history, the last ten years. The labels are the form types and 8-K item numbers the company filed under, not a reading of what it wrote — an item 5.02 can be a chief executive fired or a director retiring on schedule — so each row links to the filing.
More on TTEK
Company overviewEverything on TTEK in one place, with the price.Insider tradingWhat TTEK's own officers and directors buy and sell.Who owns itEvery manager reporting a position in TTEK.Funds holding itWhich funds and ETFs hold TTEK, and how big a bet.LobbyingWhat TTEK spends lobbying Congress, and on what.Who lobbies for itThe lobbyists on TTEK's account, and who they worked for.PatentsWhat TTEK is filing at the patent office.