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
ARS Annual report to shareholders Jan 9, 2026 Sep 28, 2025
10-K Annual report Nov 20, 2025 Sep 28, 2025
ARS Annual report to shareholders Jan 16, 2025 Sep 29, 2024
10-K Annual report Nov 19, 2024 Sep 29, 2024
ARS Annual report to shareholders Jan 18, 2024 Oct 1, 2023
10-K Annual report Nov 22, 2023 Oct 1, 2023
10-K/A Amended annual report Aug 15, 2023 Oct 2, 2022
10-K Annual report Nov 25, 2022 Oct 2, 2022
10-K Annual report Nov 24, 2021 Oct 3, 2021
10-K Annual report Nov 23, 2020 Sep 27, 2020
10-K Annual report Nov 29, 2019 Sep 29, 2019
10-K Annual report Nov 16, 2018 Sep 30, 2018
10-K Annual report Nov 20, 2017 Oct 1, 2017
10-K Annual report Nov 22, 2016 Oct 2, 2016
10-K Annual report Nov 20, 2015 Sep 27, 2015

Showing 15 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.

New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.

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.