 HOUSTON, Feb. 18, 2021 GLOBE NEWSWIRE -- ION Geophysical Corporation NYSE: IO ION or the Company today announced the successful completion of its previously announced registered direct offering of 2,990,001 shares of its common stock at a purchase price of 3.50 per share. The Company intends to use the gross proceeds of approximately 10.5 million, excluding transaction expenses, for working capital and general corporate purposes. 