X0202 4 2005-10-11 0 0000799165 TGC INDUSTRIES INC TGE 0001182279 MCINNES ALLEN T 5529 50TH STREET LUBBOCK TX 79414 1 0 1 0 Common Stock 2005-10-11 4 M 0 10000 1.00 D 600135 D Common Stock 2005-10-12 4 C 0 188500 A 788635 D Non-statutory stock option 1.00 2005-10-11 4 M 0 10000 1.00 D 2001-12-11 2005-12-11 Common Stock 10000 0 D Warrants .30 2005-10-12 4 S 0 200000 D 1999-07-31 2009-07-31 Common Stock 200000 0 D Warrants (Series A) .20 2005-10-12 4 S 0 371000 D 2002-09-10 2012-09-10 Common Stock 371000 0 D Warrants (Series A2) .20 2005-10-12 4 S 0 162329 D 2003-06-12 2013-06-12 Common Stock 162329 0 D Warrants (C2) 1.00 2004-12-15 2007-12-15 Common Stock 5200 5200 D 8-1/2% Sr Convertible Preferred Stock 2005-10-12 4 C 0 188500 D Common Stock 188500 0 D The shares of the 8-1/2% Senior Convertible Preferred Stock are convertible into Common Stock on a one-for-one basis. Includes 71,000 additional shares of Common Stock issuable upon exercise (pursuant to application of the Warrants anti-dilution provisions) resulting from the PIK dividends paid on the Company's 8-1/2% Senior Convertible Preferred Stock. Includes 12,329 additional shares of Common Stock issuable upon exercise (pursuant to application of the Warrants anti-dilution provisions) resulting from the PIK dividends paid on the Company's 8-1/2% Senior Convertible Preferred Stock. Immediately convertible. Not applicable. Warrants were sold to Company pursuant to a warrant purchase agreement that defined the sales price of each warrant as the price at which the Company's Common Stock was sold in the Company's public offering on October 6, 2005, less the exercise price of the Warrants (the "in the money value") and an amount equal to underwriting discounts and commissions of 6.5% on the in the money value. Allen T. McInnes 2005-10-13