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 |
|---|---|---|---|
| Securities registration | S-3 | 2000-08-16 | - |
| Quarterly report | 10-Q | 2000-08-16 | 2000-07-02 |
| Quarterly report | 10-Q | 2000-05-17 | 2000-04-02 |
| Passive ownership stake | SC 13G | 2000-05-10 | - |
| 424B3 | - | 2000-02-25 | - |
| S-3/A | - | 2000-02-17 | - |
| Quarterly report | 10-Q | 2000-02-16 | 2000-01-02 |
| Passive ownership stake | SC 13G | 2000-02-14 | - |
| Passive ownership stake (update) | SC 13G/A | 2000-02-14 | - |
| Passive ownership stake (update) | SC 13G/A | 2000-02-08 | - |
| Securities registration | S-3 | 2000-01-20 | - |
| Proxy statement | DEF 14A | 1999-12-30 | 2000-02-17 |
| Annual report | 10-K | 1999-12-30 | 1999-10-03 |
| 424B3 | - | 1999-10-29 | - |
| Securities registration | S-3 | 1999-10-21 | - |
| 424B3 | - | 1999-09-10 | - |
| Securities registration | S-3 | 1999-09-01 | - |
| Quarterly report | 10-Q | 1999-08-18 | 1999-07-04 |
| Quarterly report | 10-Q | 1999-05-19 | 1999-04-04 |
| Passive ownership stake (update) | SC 13G/A | 1999-05-10 | - |
| 424B3 | - | 1999-04-29 | - |
| POS AM | - | 1999-04-16 | - |
| 424B3 | - | 1999-03-24 | - |
| Prospectus supplement | 424B2 | 1999-03-09 | - |
| Prospectus supplement | 424B2 | 1999-03-09 | - |
| Annual report (amended) | 10-K/A | 1999-03-05 | 1998-10-04 |
| POS AM | - | 1999-02-26 | - |
| POS AM | - | 1999-02-26 | - |
| Securities registration | S-3 | 1999-02-26 | - |
| Passive ownership stake | SC 13G | 1999-02-17 | - |
| Quarterly report | 10-Q | 1999-02-16 | 1999-01-03 |
| Passive ownership stake (update) | SC 13G/A | 1999-02-16 | - |
| Passive ownership stake | SC 13G | 1999-02-12 | - |
| Passive ownership stake | SC 13G | 1999-02-11 | - |
| 424B4 | - | 1999-02-03 | - |
| S-3/A | - | 1999-02-02 | - |
| Annual report (amended) | 10-K/A | 1999-02-02 | 1998-10-04 |
| Passive ownership stake (update) | SC 13G/A | 1999-01-19 | - |
| DEFR14A | - | 1999-01-12 | - |
| S-3/A | - | 1999-01-08 | - |
| Securities registration | S-3 | 1998-12-31 | - |
| Proxy statement | DEF 14A | 1998-12-31 | 1999-02-17 |
| Annual report | 10-K | 1998-12-31 | 1998-10-04 |
| Major company event (amended) | 8-K/A | 1998-12-01 | 1998-09-22 |
| 424B1 | - | 1998-11-06 | - |
| Major company event | 8-K | 1998-10-01 | 1998-09-22 |
| Securities registration | S-3 | 1998-09-24 | - |
| 424B1 | - | 1998-09-02 | - |
| Securities registration | S-3 | 1998-08-11 | - |
| Proxy statement | DEF 14A | 1998-08-11 | 1998-09-14 |