GEOSPACE TECHNOLOGIES CORP — SC 13G/A Filings
90 SC 13G/A filings on record
This page lists all SC 13G/A filings submitted to the SEC by GEOSPACE TECHNOLOGIES CORP (GEOS), sorted by most recent first. Each row links to the full filing on EdgarLookup. GEOSPACE TECHNOLOGIES CORP has filed 90 SC 13G/A documents with the SEC since 1997. To view all SEC filings by GEOSPACE TECHNOLOGIES CORP, see the full filings list.
All
10-K
10-K/A
10-K405
10-Q
10-Q/A
144
3
3/A
4
4/A
424B1
424B3
424B4
8-A12B
8-K
8-K/A
ARS
CORRESP
DEF 14A
DEFA14A
EFFECT
FWP
NT 10-Q
PRE 14A
S-1
S-1/A
S-3
S-3/A
S-8
S-8 POS
SC 13D
SC 13D/A
SC 13G
SC 13G/A
SCHEDULE 13G
SCHEDULE 13G/A
SD
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| SC 13G/A | — | 0001398344-14-005753 | Nov 10, 2014 | — |
| SC 13G/A | — | 0001398344-14-000954 | Feb 13, 2014 | — |
| SC 13G/A | — | 0000932471-14-003149 | Feb 11, 2014 | — |
| SC 13G/A | — | 0000790502-14-000036 | Jan 30, 2014 | — |
| SC 13G/A | — | 0001086364-14-000061 | Jan 10, 2014 | — |
| SC 13G/A | — | 0001398344-13-004392 | Sep 10, 2013 | — |
| SC 13G/A | — | 0001398344-13-003718 | Aug 9, 2013 | — |
| SC 13G/A | — | 0001086364-13-003688 | May 10, 2013 | — |
| SC 13G/A | — | 0001398344-13-000783 | Feb 14, 2013 | — |
| SC 13G/A | — | 0001086364-13-003274 | Feb 8, 2013 | — |
| SC 13G/A | — | 0000790502-13-000030 | Jan 29, 2013 | — |
| SC 13G/A | SCHEDULE 13G AMENDMENT NO. 10 | 0001193125-12-077622 | Feb 24, 2012 | — |
| SC 13G/A | — | 0000790502-12-000018 | Jan 25, 2012 | — |
| SC 13G/A | — | 0000790502-11-000014 | Jan 27, 2011 | — |
| SC 13G/A | — | 0000790502-10-000042 | Jan 26, 2010 | — |
| SC 13G/A | — | 0000790502-09-000028 | Jan 27, 2009 | — |
| SC 13G/A | AMENDMENT #9 TO SCHEDULE 13G | 0001193125-09-005833 | Jan 14, 2009 | — |
| SC 13G/A | AMENDMENT NO. 8 TO SCH 13G | 0001193125-09-002236 | Jan 7, 2009 | — |
| SC 13G/A | AMENDMENT NO. 7 TO SCH 13G | 0001193125-08-262005 | Dec 30, 2008 | — |
| SC 13G/A | AMENDMENT NO. 6 TO SC 13G | 0001193125-08-257091 | Dec 19, 2008 | — |
| SC 13G/A | — | 0000947772-08-000040 | May 12, 2008 | — |
| SC 13G/A | — | 0000790502-07-000034 | Mar 7, 2007 | — |
| SC 13G/A | AMENDMENT NO. 5 TO SCHEDULE 13G | 0001193125-07-048144 | Mar 7, 2007 | — |
| SC 13G/A | — | 0000790502-07-000031 | Feb 22, 2007 | — |
| SC 13G/A | SCHEDULE 13/G AMENDMENT NO. 4 | 0001193125-07-033649 | Feb 16, 2007 | — |
| SC 13G/A | DOC ONE | 0000315066-07-002063 | Feb 14, 2007 | — |
| SC 13G/A | SCHEDULE 13G | 0000898430-07-002560 | Feb 9, 2007 | — |
| SC 13G/A | SCHEDULE 13G | 0000898430-07-001187 | Feb 2, 2007 | — |
| SC 13G/A | SCHEDULE 13G AMENDMENT NO. 3 | 0001193125-06-116226 | May 19, 2006 | — |
| SC 13G/A | SCHEDULE 13G AMENDMENT NO. 2 | 0001193125-06-094680 | May 1, 2006 | — |
| SC 13G/A | SCHEDULE 13G AMENDMENT NO. 2 | 0001193125-06-077537 | Apr 11, 2006 | — |
| SC 13G/A | SCHEDULE 13G | 0000898430-06-001146 | Feb 6, 2006 | — |
| SC 13G/A | — | 0000790502-06-000005 | Jan 31, 2006 | — |
| SC 13G/A | SCHEDULE 13G/A | 0001193125-05-171097 | Aug 18, 2005 | — |
| SC 13G/A | AMENDMENT TO SCHEDULE 13G | 0000950134-05-001460 | Jan 27, 2005 | — |
| SC 13G/A | — | 0000790502-03-000016 | Jan 31, 2003 | — |
| SC 13G/A | — | 0000790502-02-000033 | Feb 4, 2002 | — |
| SC 13G/A | — | 0000790502-01-000024 | Jan 10, 2001 | — |
| SC 13G/A | AMENDMENT NO. 1 TO SCHEDULE 13G | 0000950134-00-001141 | Feb 14, 2000 | — |
| SC 13G/A | — | 0000790502-00-000057 | Jan 11, 2000 | — |