DAWSON GEOPHYSICAL CO — SC 13G/A Filings
63 SC 13G/A filings on record
This page lists all SC 13G/A filings submitted to the SEC by DAWSON GEOPHYSICAL CO (DWSN), sorted by most recent first. Each row links to the full filing on EdgarLookup. DAWSON GEOPHYSICAL CO has filed 63 SC 13G/A documents with the SEC since 2004. To view all SEC filings by DAWSON GEOPHYSICAL CO, see the full filings list.
All
10-K
10-K/A
10-Q
10-QT
10KSB
10KSB/A
10QSB
10QSB/A
25
3
4
4/A
424B3
424B4
425
5
5/A
8-A12B
8-A12G
8-K
8-K/A
ARS
CERTAMX
CERTNAS
CORRESP
DEF 14A
DEFA14A
DEFM14A
DEFR14A
DEFS14A
EFFECT
NT 10-K
NT 10-Q
POS EX
PRE 14A
PREM14A
PRER14A
PRES14A
S-4
S-4/A
S-8
S-8 POS
SB-2
SB-2/A
SC 13D
SC 13D/A
SC 13G
SC 13G/A
SC 14D9
SC 14D9/A
SC TO-T
SC TO-T/A
SCHEDULE 13D/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| SC 13G/A | — | 0000906304-09-000252 | Jan 30, 2009 | — |
| SC 13G/A | JAN 2009 13GA | 0000820478-09-000022 | Jan 9, 2009 | — |
| SC 13G/A | — | 0000906304-08-000432 | Nov 6, 2008 | — |
| SC 13G/A | — | 0000906304-08-000210 | Jan 31, 2008 | — |
| SC 13G/A | — | 0001144204-07-008401 | Feb 15, 2007 | — |
| SC 13G/A | AMENDMENT | 0001104659-06-007724 | Feb 10, 2006 | — |
| SC 13G/A | AMENDMENT NO. 1 TO SCHEDULE 13G | 0001193125-06-020911 | Feb 6, 2006 | — |
| SC 13G/A | — | 0000914248-02-000066 | Apr 9, 2002 | — |
| SC 13G/A | — | 0000914248-02-000059 | Mar 11, 2002 | — |
| SC 13G/A | — | 0000914248-02-000028 | Feb 12, 2002 | — |
| SC 13G/A | — | 0000914248-01-000030 | Feb 14, 2001 | — |
| SC 13G/A | — | 0000914248-00-000022 | Mar 2, 2000 | — |
| SC 13G/A | — | 0000914248-99-000033 | Feb 11, 1999 | — |