TGC Industries Added to Russell 3000® Index

PLANO, Texas, June 25, 2012 /PRNewswire/ -- TGC Industries, Inc. (NASDAQ: TGE) ("TGC") today announced that it has been added to the Russell 3000® Index as of the close of the U.S. markets on June 22, 2012, when Russell Investments ("Russell") reconstituted its comprehensive set of U.S. and global equity indexes.  The Russell 3000 Index measures the performance of the largest 3000 U.S. companies, representing approximately 98% of the investable U.S. equity market. 

Based on its membership in the Russell 3000 Index, which remains in place for one year, TGC will also automatically be included in the small-cap Russell 2000® Index, as well as the appropriate growth and value style indexes.  Russell determines membership for its equity indexes primarily by objective market capitalization rankings and style attributes.  The Russell 3000 Index also serves as the U.S. component of the Russell Global® Index.  The Russell indexes are widely used by investment managers and institutional investors for index funds and as benchmarks for both passive and active investment strategies. 

TGC Industries, Inc., based in Plano, Texas, is a leading provider of seismic data acquisition services with operations throughout the continental United States and Canada.  The Company has branch offices in Houston, Midland, Oklahoma City and Calgary.

SOURCE TGC Industries, Inc.