Clear Channel Outdoor Holdings Inc. (CCO), Tennant Company (TNC), Edgewater Technology Inc. (EDGW), Layne Christensen Company (LAYN): GAMCO Investors’ October Moves
Mario Gabelli’s GAMCO Investors has been particularly active over the past few days. Since the October 1, the mutual fund filed 8 Schedule 13D forms, disclosing changes it its equity positions.

