TTEK - CIK 0000831641
TETRA TECH INC has filed 2,115 documents with the SEC between 1995 and 2026. The most frequent type is insider trade (1,320 filings), alongside the regular cadence of annual reports, quarterly reports, and event disclosures every public company must make. Use the filters to focus on one filing type, or flip the sort to trace the company's history from its earliest paperwork.
Data parsed from SEC EDGAR XBRL filings. See the full market cap rankings.
| Filing | Type | Filed | Period covered |
|---|---|---|---|
| 424B3 | - | 2002-04-15 | - |
| Passive ownership stake (update) | SC 13G/A | 2002-04-10 | - |
| Employee stock plan | S-8 | 2002-04-04 | - |
| Securities registration | S-3 | 2002-04-04 | - |
| Major company event | 8-K | 2002-03-15 | 2002-03-14 |
| Quarterly report | 10-Q | 2002-02-13 | 2001-12-30 |
| Passive ownership stake (update) | SC 13G/A | 2002-02-12 | - |
| Passive ownership stake (update) | SC 13G/A | 2002-02-07 | - |
| Passive ownership stake (update) | SC 13G/A | 2002-02-06 | - |
| Major company event | 8-K | 2002-01-17 | 2002-01-16 |
| Annual report | 10-K | 2001-12-31 | 2001-09-30 |
| Proxy statement | DEF 14A | 2001-12-31 | 2002-02-19 |
| Major company event | 8-K | 2001-11-15 | 2001-11-14 |
| 424B3 | - | 2001-10-25 | - |
| 424B3 | - | 2001-10-09 | - |
| S-3MEF | - | 2001-09-27 | - |
| S-3MEF | - | 2001-09-27 | - |
| Securities registration | S-3 | 2001-09-27 | - |
| 424B3 | - | 2001-08-24 | - |
| Securities registration | S-3 | 2001-08-15 | - |
| Quarterly report | 10-Q | 2001-08-15 | 2001-07-01 |
| Major company event | 8-K | 2001-07-19 | 2001-07-18 |
| Major company event | 8-K | 2001-07-06 | 2001-07-02 |
| 424B3 | - | 2001-06-29 | - |
| Securities registration | S-3 | 2001-06-21 | - |
| 424B3 | - | 2001-06-05 | - |
| DEF 14C | - | 2001-05-31 | 2001-07-31 |
| Securities registration | S-3 | 2001-05-29 | - |
| 424B3 | - | 2001-05-25 | - |
| Quarterly report (amended) | 10-Q/A | 2001-05-23 | 2001-04-01 |
| Quarterly report (amended) | 10-Q/A | 2001-05-18 | 2001-04-01 |
| Securities registration | S-3 | 2001-05-16 | - |
| Quarterly report | 10-Q | 2001-05-16 | 2001-04-01 |
| Passive ownership stake (update) | SC 13G/A | 2001-05-10 | - |
| Passive ownership stake (update) | SC 13G/A | 2001-02-14 | - |
| Quarterly report | 10-Q | 2001-02-14 | 2000-12-31 |
| Passive ownership stake (update) | SC 13G/A | 2001-02-14 | - |
| Passive ownership stake (update) | SC 13G/A | 2001-02-12 | - |
| Passive ownership stake | SC 13G | 2001-02-09 | - |
| Passive ownership stake (update) | SC 13G/A | 2001-02-09 | - |
| Proxy statement | DEF 14A | 2001-01-12 | 2001-02-22 |
| 424B3 | - | 2001-01-09 | - |
| PRE 14A | - | 2001-01-02 | 2001-02-22 |
| Employee stock plan | S-8 | 2000-12-29 | - |
| Securities registration | S-3 | 2000-12-29 | - |
| Annual report | 10-K | 2000-12-29 | 2000-10-01 |
| Major company event | 8-K | 2000-12-13 | 2000-12-13 |
| 424B3 | - | 2000-11-08 | - |
| Securities registration | S-3 | 2000-10-27 | - |
| 424B3 | - | 2000-09-18 | - |