TETRA TECH INC — SC 13G/A Filings
97 SC 13G/A filings on record
This page lists all SC 13G/A filings submitted to the SEC by TETRA TECH INC (TTEK), sorted by most recent first. Each row links to the full filing on EdgarLookup. TETRA TECH INC has filed 97 SC 13G/A documents with the SEC since 2014. To view all SEC filings by TETRA TECH INC, see the full filings list.
All
10-C
10-K
10-K/A
10-Q
10-Q/A
144
3
3/A
4
4/A
424B1
424B2
424B3
424B4
5
8-K
8-K/A
ARS
CORRESP
DEF 14A
DEF 14C
DEFA14A
DEFR14A
NT 10-K
NT 10-Q
POS AM
PRE 14A
PRER14C
S-3
S-3/A
S-3MEF
S-8
SC 13D
SC 13D/A
SC 13G
SC 13G/A
SCHEDULE 13D/A
SCHEDULE 13G
SCHEDULE 13G/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| SC 13G/A | SEC SCHEDULE 13G | 0001532155-24-000092 | Feb 14, 2024 | — |
| SC 13G/A | SCHEDULE 13G/A | 0001104659-24-022083 | Feb 13, 2024 | — |
| SC 13G/A | — | 0001086364-24-002077 | Jan 24, 2024 | — |
| SC 13G/A | SCHEDULE 13G/A | 0001104659-23-017089 | Feb 9, 2023 | — |
| SC 13G/A | — | 0001306550-23-008284 | Feb 7, 2023 | — |
| SC 13G/A | SCHEDULE 13G/A | 0001104659-22-126218 | Dec 12, 2022 | — |
| SC 13G/A | SCHEDULE 13G/A | 0001104659-22-018701 | Feb 10, 2022 | — |
| SC 13G/A | — | 0000834237-22-002132 | Jan 27, 2022 | — |
| SC 13G/A | — | 0000834237-22-000623 | Jan 25, 2022 | — |
| SC 13G/A | SEC SCHEDULE 13G | 0000354204-21-000244 | Feb 12, 2021 | — |
| SC 13G/A | SCHEDULE 13G/A | 0001104659-21-019219 | Feb 10, 2021 | — |
| SC 13G/A | — | 0000834237-21-002119 | Jan 27, 2021 | — |
| SC 13G/A | SCHEDULE 13G/A | 0001104659-20-017418 | Feb 12, 2020 | — |
| SC 13G/A | — | 0000834237-20-002807 | Feb 4, 2020 | — |
| SC 13G/A | — | 0000932471-19-005756 | Feb 12, 2019 | — |
| SC 13G/A | SCHEDULE 13G/A | 0001258897-19-001305 | Feb 8, 2019 | — |
| SC 13G/A | — | 0000215457-19-002662 | Jan 31, 2019 | — |
| SC 13G/A | — | 0000932471-18-006535 | Aug 8, 2018 | — |
| SC 13G/A | — | 0000932471-18-004458 | Feb 12, 2018 | — |
| SC 13G/A | SCHEDULE 13G/A | 0001258897-18-001310 | Feb 9, 2018 | — |
| SC 13G/A | — | 0000215457-18-001573 | Jan 19, 2018 | — |
| SC 13G/A | — | 0000932471-17-001901 | Feb 10, 2017 | — |
| SC 13G/A | — | 0000215457-17-000932 | Jan 17, 2017 | — |
| SC 13G/A | — | 0000215457-16-006113 | Apr 8, 2016 | — |
| SC 13G/A | — | 0000932471-16-011673 | Feb 10, 2016 | — |
| SC 13G/A | — | 0000215457-16-004050 | Jan 27, 2016 | — |
| SC 13G/A | — | 0001374170-15-000020 | Aug 12, 2015 | — |
| SC 13G/A | — | 0000932471-15-003751 | Feb 10, 2015 | — |
| SC 13G/A | — | 0001086364-15-000382 | Jan 15, 2015 | — |
| SC 13G/A | — | 0000932471-14-003792 | Feb 12, 2014 | — |
| SC 13G/A | — | 0001086364-14-001651 | Jan 30, 2014 | — |
| SC 13G/A | NONE | 0001140361-13-006874 | Feb 14, 2013 | — |
| SC 13G/A | — | 0000932471-13-002368 | Feb 11, 2013 | — |
| SC 13G/A | — | 0001086364-13-003482 | Feb 8, 2013 | — |
| SC 13G/A | TETRA TECH, INC. | 0000914208-12-000355 | Apr 9, 2012 | — |
| SC 13G/A | NONE | 0001140361-12-007653 | Feb 14, 2012 | — |
| SC 13G/A | — | 0001086364-12-001018 | Feb 10, 2012 | — |
| SC 13G/A | TETRA TECH, INC. 12312011 | 0000914208-12-000186 | Feb 10, 2012 | — |
| SC 13G/A | TETRA TECH, INC. | 0000914208-11-000231 | Feb 14, 2011 | — |
| SC 13G/A | — | 0001140361-11-008598 | Feb 14, 2011 | — |
| SC 13G/A | — | 0001086364-11-003884 | Feb 9, 2011 | — |
| SC 13G/A | TETRA TECH, INC. | 0000914208-10-000161 | Feb 12, 2010 | — |
| SC 13G/A | — | 0000895345-09-000102 | Feb 17, 2009 | — |
| SC 13G/A | TETRA TECH INC. | 0000914208-09-000265 | Feb 12, 2009 | — |
| SC 13G/A | TETRA TECH, INC. | 0000902664-09-000181 | Jan 23, 2009 | — |
| SC 13G/A | — | 0000895345-08-000117 | Feb 13, 2008 | — |
| SC 13G/A | TETRA TECH, INC. | 0001193125-08-028268 | Feb 13, 2008 | — |
| SC 13G/A | AMENDMENT TO SCHEDULE 13G | 0000950129-08-000881 | Feb 13, 2008 | — |
| SC 13G/A | TETRA TECH, INC. | 0000902664-08-000944 | Feb 12, 2008 | — |
| SC 13G/A | TETRA TECH INC | 0000950135-08-000157 | Jan 11, 2008 | — |