$ SC 13D/A SEC Filings

Filed On	Filing
05 May 2022	ION GEOPHYSICAL CORPORATION
23 Sep 2021	ION GEOPHYSICAL CORPORATION
20 Sep 2021	ION GEOPHYSICAL CORPORATION
16 Jun 2021	SC 13D/A
07 Nov 2016	SC 13D AMENDMENT NO. 8
05 Oct 2016	SC 13D/A
12 Sep 2016	SC 13D/A
08 Dec 2015	SC 13D/A
23 Mar 2005	SC 13D AMENDMENT NO. 4
23 Mar 2005	SC 13D AMENDMENT NO.4
02 Jul 2004	AMENDMENT NO.3 TO SCHEDULE 13D
02 Jul 2004	AMENDMENT NO.3 TO SCHEDULE 13D
13 Jan 2004	SCHEDULE 13D/A AMENDMENT NO. 2
13 Jan 2004	SCHEDULE 13D/A AMENDMENT NO. 2
28 Apr 2003	SCHEDULE 13D/A
28 Apr 2003	SCHEDULE 13 D/A
07 Aug 2002	SCF IV LP FOR INPUT/OUTPUT INC - AMENDMENT NO.2
18 Aug 1999	INPUT/OUTPUT, INC. - AMENDMENT NO. 1