SC 13G | SEC Filings Hub

Filing metadata

Accession number: 0001193125-12-227338
Form type: SC 13G
Filer: ION GEOPHYSICAL CORP
CIK: CIK 866609
Filed: May 11, 2012
Reporting period: —
Description: Passive 5%+ stake

Documents

0001193125-12-227338-index.htm

Complete submission

0001193125-12-227338.txt

directory listing

Filed by

ION GEOPHYSICAL CORP