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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
866609	Ion Geophysical Corp	IO	Oil & Gas Field Exploration Services (1382)	222286646

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1072813	Jr M James Lapeyre	2105 Citywest Boulevard Suite 100 Houston TX 77042-2855		Yes	No	Yes	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2016-12-21	10,500	$6.69	979,709	No	4	P	Indirect	Shares held by Laitram, LLC
Common Stock	Acquisiton	2016-12-22	107	$6.80	979,816	No	4	P	Indirect	Shares held by Laitram, LLC

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	Shares held by Laitram, LLC
No	4	P	Indirect	Shares held by Laitram, LLC

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	157,773	Direct
Common Stock	699	Indirect	Co-Trustee for Children
Common Stock	32,850	Indirect	Joint account with adult child (J)
Common Stock	32,850	Indirect	Joint account with adult child (K)
Common Stock	33,702	Indirect	Joint account with adult child (S)

Footnotes

Open market purchase pursuant to a 10b5-1 trading plan adopted by the Reporting Person, in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended.
This transaction was executed in multiple trades at prices ranging from $6.50 to $7.05, inclusive. The price set forth above reflects the weighted-average price per share. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.