X0306 4 2016-03-01 0 0000866609 ION GEOPHYSICAL CORP IO 0001297501 Hanson R Brian 2105 CITYWEST BOULEVARD SUITE 400 HOUSTON TX 77042-2839 1 1 0 0 President & CEO Common Stock 2016-03-01 4 A 0 50000 0.00 A 90182 D Common Stock 2016-03-01 4 P 0 20000 3.8356 A 110182 D Common Stock 666 I Shares held by Spouse Stock Appreciation Right 3.10 2026-03-01 Common Stock 300000 300000 D Employee Stock Option (right to buy) 3.10 2017-03-01 2026-03-01 Common Stock 100000 100000 D Restricted Stock grant issued pursuant to the ION Geophysical Corporation Amended and Restated 2013 Long Term Incentive Plan. Shares will vest in three equal annual installments beginning the first anniversary of the transaction date in Column 2. As adjusted for the one-for-fifteen reverse stock split completed on 02/04/2016. This transaction was executed in multiple trades at prices ranging from $3.25 to $4.21, 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. Issued pursuant to the ION Geophysical Corporation Stock Appreciation Rights Plan. The SARs will vest in one-third increments upon the achievement of performance targets set at 20%, 25% and 30% appreciation of the 20-day volume weighted average price per share over the exercise price of the SAR. No SARs can be exercised prior to the first anniversary of the grant date. Beginning on the first anniversary date, SARs can be exercised up to one-third per year. Issued pursuant to the ION Geophysical Corporation Amended and Restated 2013 Long Term Incentive Plan and become exercisable in four equal annual installments beginning on the date specified in Column 6. Rebecca F. Sacco, attorney-in-fact 2016-03-02