GEOSPACE TECHNOLOGIES CORP — SC 13D/A Filings
9 SC 13D/A filings on record
This page lists all SC 13D/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 9 SC 13D/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 13D/A | AMENDMENT NO. 1 TO THE SCHEDULE 13D | 0001013594-20-000664 | Aug 26, 2020 | — |
| SC 13D/A | — | 0001659213-20-000002 | Jul 15, 2020 | — |
| SC 13D/A | FEBRUARY 8, 2019 | 0001013594-19-000118 | Feb 8, 2019 | — |
| SC 13D/A | 13DA | 0001659213-18-000004 | Dec 12, 2018 | — |
| SC 13D/A | — | 0001659213-18-000003 | May 15, 2018 | — |
| SC 13D/A | PEBBLETON CORPORATION N.V. FOR OYO GEOSPACE | 0000950129-04-001527 | Mar 25, 2004 | — |
| SC 13D/A | PEBBLETON CORPORATION N.V. FOR OYO GEOSPACE CORP. | 0000950129-04-000981 | Mar 3, 2004 | — |
| SC 13D/A | PEBBLETON CORPORATION N.V. FOR OYO GEOSPACE CORP. | 0000950129-04-000816 | Feb 26, 2004 | — |
| SC 13D/A | AMENDMENT TO SCHEDULE 13D - R. CHANEY & PARTNERS | 0000950134-97-009470 | Dec 22, 1997 | — |