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 | TETRA TECH INC. NEW SC 13G/A | 0000950152-07-007371 | Sep 6, 2007 | — |
| SC 13G/A | TTEK AS OF 12/31/2006 | 0000080255-07-000427 | Feb 14, 2007 | — |
| SC 13G/A | TETRA TECH, INC. | 0000902664-07-000589 | Feb 13, 2007 | — |
| SC 13G/A | SC 13G/A | 0000017283-07-000709 | Feb 12, 2007 | — |
| SC 13G/A | TETRA TECH, INC. | 0000902664-06-000760 | Feb 14, 2006 | — |
| SC 13G/A | — | 0001329883-06-000099 | Feb 14, 2006 | — |
| SC 13G/A | TTEK AS OF 12/31/2005 | 0000080255-06-000052 | Feb 13, 2006 | — |
| SC 13G/A | TTEK AS OF 12/31/2004 | 0000080255-05-000433 | Feb 14, 2005 | — |
| SC 13G/A | TETRA TECH, INC. | 0000891804-05-000511 | Feb 11, 2005 | — |
| SC 13G/A | TTEK AS OF 12/31/2003 | 0000080255-04-000365 | Feb 12, 2004 | — |
| SC 13G/A | SCHEDULE 13G/A | 0001193125-04-018060 | Feb 10, 2004 | — |
| SC 13G/A | AMENDMENT TO SCHEDULE 13G | 0000950134-03-002202 | Feb 12, 2003 | — |
| SC 13G/A | AS OF 12/31/2002 | 0000080255-03-000191 | Feb 5, 2003 | — |
| SC 13G/A | A I M MANAGEMENT GROUP INC. FOR TETRA TECH, INC. | 0000950129-02-001834 | Apr 10, 2002 | — |
| SC 13G/A | AS OF 12/31/2001 | 0000080255-02-000211 | Feb 12, 2002 | — |
| SC 13G/A | SCHEDULE 13G/A | 0000950124-02-000259 | Feb 7, 2002 | — |
| SC 13G/A | A I M MANAGEMENT GROUP INC. - TETRA TECH, INC. | 0000950129-02-000520 | Feb 6, 2002 | — |
| SC 13G/A | AIM MANAGEMENT GROUP INC. FOR TETRA TECH, INC. | 0000950129-01-500521 | May 10, 2001 | — |
| SC 13G/A | SC 13G/A | 0000912057-01-005891 | Feb 14, 2001 | — |
| SC 13G/A | AMENDMENT TO SCHEDULE 13G | 0000810717-01-000075 | Feb 14, 2001 | — |
| SC 13G/A | — | 0000080255-01-000274 | Feb 12, 2001 | — |
| SC 13G/A | — | 0000073076-01-000002 | Feb 9, 2001 | — |
| SC 13G/A | SC 13G/A | 0000912057-00-006843 | Feb 14, 2000 | — |
| SC 13G/A | — | 0000080255-00-000273 | Feb 8, 2000 | — |
| SC 13G/A | SCHEDULE 13G AMENDMENT #1 | 0000928385-99-001668 | May 10, 1999 | — |
| SC 13G/A | SCHED 13G | 0001047469-99-006210 | Feb 16, 1999 | — |
| SC 13G/A | AMENDMENT TO SCHEDULE 13G | 0000943152-99-000014 | Jan 19, 1999 | — |
| SC 13G/A | AMENDMENT TO SCHEDULE 13G | 0000943152-98-000306 | Jun 10, 1998 | — |
| SC 13G/A | AMENDMENT TO SCHEDULE 13G | 0000943152-98-000287 | Apr 9, 1998 | — |
| SC 13G/A | AMENDMENT TO SCHEDULE 13G | 0000943152-98-000217 | Mar 9, 1998 | — |
| SC 13G/A | SCH13G | 0001047469-98-004927 | Feb 11, 1998 | — |
| SC 13G/A | SCHEDULE 13G | 0000950115-98-000230 | Feb 10, 1998 | — |
| SC 13G/A | SCHEDULE 13G AMENDMENT | 0000912057-98-000164 | Feb 6, 1998 | — |
| SC 13G/A | SCHEDULE 13G AMENDMENT | 0000912057-98-000076 | Feb 6, 1998 | — |
| SC 13G/A | — | 0000073076-98-000006 | Jan 29, 1998 | — |
| SC 13G/A | SCHEDULE 13G | 0000950115-98-000036 | Jan 9, 1998 | — |
| SC 13G/A | SCHEDULE 13G/A | 0000943152-97-000359 | Jun 23, 1997 | — |
| SC 13G/A | AMENDMENT #4 TO SCHEDULE 13G | 0000898430-97-000537 | Feb 13, 1997 | — |
| SC 13G/A | — | 0000073076-97-000035 | Feb 7, 1997 | — |
| SC 13G/A | SCHEDULE 13G AMENDMENT | 0000065103-96-000202 | Dec 10, 1996 | — |
| SC 13G/A | SCHEDULE 13G -5-10-96 - TETRA TECHNOLOGIES INCORPORATED | 0000315066-96-001583 | May 13, 1996 | — |
| SC 13G/A | — | 0000068100-96-000385 | Feb 15, 1996 | — |
| SC 13G/A | SCHEDULE 13G AMENDMENT | 0000065103-96-000135 | Feb 13, 1996 | — |
| SC 13G/A | SCHEDULE 13G AMENDMENT | 0000065103-95-000151 | Nov 16, 1995 | — |
| SC 13G/A | — | 0000068100-95-000214 | Feb 15, 1995 | — |
| SC 13G/A | SCHEDULE 13G AMENDMENT | 0000065103-95-000070 | Feb 13, 1995 | — |
| SC 13G/A | SCHEDULE 13G - 2-14-95 - TETRA TECHNOLOGIES, INCORPORATED | 0000315066-95-002111 | Feb 10, 1995 | — |