27 filings
EFFECT
DWSN
Dawson Geophysical Co
19 Feb 15
Notice of effectiveness
12:00am
EFFECT
DWSN
Dawson Geophysical Co
20 Apr 12
Notice of effectiveness
12:00am
UPLOAD
DWSN
Dawson Geophysical Co
22 Nov 11
Letter from SEC
12:00am
EFFECT
DWSN
Dawson Geophysical Co
23 Sep 11
Notice of effectiveness
12:00am
CORRESP
DWSN
Dawson Geophysical Co
22 Sep 11
Correspondence with SEC
12:00am
CORRESP
l8mtm
29 Aug 11
Correspondence with SEC
12:00am
UPLOAD
7fn5kii7
24 Aug 11
Letter from SEC
12:00am
CORRESP
j8gwvcwc3ymby5m
8 Aug 11
Correspondence with SEC
12:00am
CORRESP
kws1 rnjsf7lcy
26 Jul 11
Correspondence with SEC
12:00am
CORRESP
nfn6dzz445rg
20 Jul 11
Correspondence with SEC
12:00am
UPLOAD
00nlk
8 Jul 11
Letter from SEC
12:00am
UPLOAD
alfk4qgz mswgboj
4 Feb 11
Letter from SEC
12:00am
CORRESP
d93yg
13 Jan 11
Correspondence with SEC
12:00am
UPLOAD
sefx55vjw
3 Jan 11
Letter from SEC
12:00am
EFFECT
acrp e1w5
9 Apr 09
Notice of effectiveness
12:00am
UPLOAD
1sxpk
20 Feb 09
Letter from SEC
12:00am
CORRESP
4bioubiw2mdwuhneiap
13 Feb 09
Correspondence with SEC
12:00am
UPLOAD
5he4im4h
10 Feb 09
Letter from SEC
12:00am
CORRESP
pj731ew30v vnz8
4 Feb 09
Correspondence with SEC
12:00am
UPLOAD
f3xk 0u6jx
30 Jan 09
Letter from SEC
12:00am