Notes: Feb. 11, 2015 -- Dawson Geophysical Company, previously known as TGC Industries, Inc., today announced the completion of its previously announced strategic business combination effective February 11, 2015. Trading in the combined company's common stock will open on NASDAQ on February 12, 2015 under the symbol DWSN on a post-split basis. Under the terms of the transaction, which was structured as a stock-for-stock merger and intended to qualify as a tax-free reorganization, Dawson Operating Company, previously known as Dawson Geophysical Company ("Legacy Dawson"), merged with a wholly owned subsidiary of Dawson Geophysical Company (the "Combined Company"), previously known as TGC Industries, Inc. ("Legacy TGC") and continued as the surviving entity and a wholly owned subsidiary of the Combined Company. As consideration for the transaction, all outstanding shares of Legacy Dawson's common stock, par value $0.33 1/3 per share, were converted into the right to receive 1.760 shares of Legacy TGC's common stock, par value $0.01 per share, after giving effect to a 1-for-3 reverse stock split of Legacy TGC's common stock. Immediately prior to the effective time of the transaction, Legacy Dawson changed its name to "Dawson Operating Company" and Legacy TGC changed its name to "Dawson Geophysical Company".