Dawson Geophysical , which provides seismic data to oil and gas producers, plans to buy rival TGC Industries for about $157 million in stock as customers look to raise production amid higher oil prices. Under the terms of the deal, TGC shareholders will get 0.188 Dawson share for each share they own. This values TGC at $8.00 a share, which is 17 percent higher than the stock's Friday close.
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