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Tetra Tech (TTEK) SEC Filing (8-K) 2005

Browse all Tetra Tech SEC filings, including Annual reports (10-K), Quarterly reports (10-Q), 8-K, proxy statements (DEF 14A), and insider filings (Form 4). Access official documents by filing date, reporting period, and form type. ...more

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Last updated: March 17, 2026, 5:32 AM ET

SEC Filings

Date

2005

8-K

Material company events (earnings, M&A, or leadership changes)

Sep 9, 2005 02:57 PM

2026

4

Insider ownership (buying, selling) activity

Aug 6, 2026 05:17 PM

S-8

Registration of shares for employee stock plans

Aug 5, 2026 04:03 PM

10-Q

Quarterly financial results and management updates

Jul 31, 2026 04:34 PM

8-K

Material company events (earnings, M&A, or leadership changes)

Jul 29, 2026 04:58 PM

4

Insider ownership (buying, selling) activity

Jun 5, 2026 07:08 PM

4

Insider ownership (buying, selling) activity

May 15, 2026 05:36 PM

10-Q

Quarterly financial results and management updates

May 1, 2026 04:33 PM

SC 13G

Passive large shareholder ownership disclosure

Apr 30, 2026 02:01 PM

8-K

Material company events (earnings, M&A, or leadership changes)

Apr 29, 2026 04:06 PM

4

Insider ownership (buying, selling) activity

Apr 28, 2026 07:35 PM

3

Initial disclosure of insider ownership

Apr 3, 2026 07:05 PM

SC 13G/A

Updated passive ownership disclosure

Mar 27, 2026 01:33 PM

8-K

Material company events (earnings, M&A, or leadership changes)

Mar 26, 2026 04:05 PM

4

Insider ownership (buying, selling) activity

Mar 18, 2026 08:43 PM

8-K

Material company events (earnings, M&A, or leadership changes)

Feb 20, 2026 05:00 PM

4

Insider ownership (buying, selling) activity

Feb 20, 2026 07:02 PM

4

Insider ownership (buying, selling) activity

Feb 20, 2026 07:04 PM

4

Insider ownership (buying, selling) activity

Feb 12, 2026 05:02 PM

4

Insider ownership (buying, selling) activity

Feb 6, 2026 05:07 PM

4

Insider ownership (buying, selling) activity

Feb 6, 2026 05:07 PM

10-Q

Quarterly financial results and management updates

Jan 30, 2026 04:02 PM

8-K

Material company events (earnings, M&A, or leadership changes)

Jan 28, 2026 05:15 PM

4

Insider ownership (buying, selling) activity

Jan 28, 2026 05:11 PM

4

Insider ownership (buying, selling) activity

Jan 28, 2026 05:11 PM

4

Insider ownership (buying, selling) activity

Jan 14, 2026 04:26 PM

4

Insider ownership (buying, selling) activity

Jan 14, 2026 04:26 PM

ARS

Annual Report to Shareholders

Jan 9, 2026 04:14 PM

DEFA14A

Additional or supplemental proxy disclosures

Jan 9, 2026 04:11 PM

DEF 14A

Final shareholder voting details (board elections and executive pay)

Jan 9, 2026 04:04 PM

3

Initial disclosure of insider ownership

Jan 8, 2026 05:07 PM

3

Initial disclosure of insider ownership

Jan 6, 2026 05:46 PM

8-K

Material company events (earnings, M&A, or leadership changes)

Jan 6, 2026 04:34 PM

2025

8-K

Material company events (earnings, M&A, or leadership changes)

Dec 22, 2025 04:32 PM

4

Insider ownership (buying, selling) activity

Dec 3, 2025 05:54 PM

4

Insider ownership (buying, selling) activity

Dec 2, 2025 08:20 PM

4

Insider ownership (buying, selling) activity

Dec 2, 2025 08:23 PM

4

Insider ownership (buying, selling) activity

Dec 2, 2025 08:22 PM

4

Insider ownership (buying, selling) activity

Dec 2, 2025 08:11 PM

4

Insider ownership (buying, selling) activity

Dec 2, 2025 08:13 PM

4

Insider ownership (buying, selling) activity

Dec 2, 2025 08:15 PM

Tetra Tech (Form 8-K) 2005

Current Events / Material company events (earnings, M&A, or leadership changes)

Sep 9, 2005 02:57 PM

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