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ION GEOPHYSICAL CORP
ION GEOPHYSICAL CORP. Institutional holdings reported to the SEC.

Institutional Holders (2014Q1)
Portfolio Summary: 2 Institutional holders with a total value of $289,000.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 CITADEL ADVISORS LLC 48,500 204,000 70.59% Put
2 GROUP ONE TRADING LLC 20,100 85,000 29.41% Put

From 2023-01-03 onward, the SEC requires values to be reported in nearest dollars. Earlier filings reported values in thousands; therefore, positions shown as $0 in older filings may represent actual values between $0–$999.