DAWSON GEOPHYSICAL CO — Director's Dealing 2012

Jun 15, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TGC INDUSTRIES INC (TGE)
CIK: 0000799165
Period of Report: 2012-06-14

Reporting Person: MCINNES ALLEN T (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-06-14	Common Stock	S	10325	$9.957	Disposed	1023773	Direct
2012-06-15	Common Stock	S	19675	$9.9558	Disposed	1004098	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Nonqualified Stock Option	$7.98	2012-09-18	Common Stock (11539)	11539	Direct
Nonqualified Stock Option	$2.95	2013-10-22	Common Stock (25536)	25536	Direct
Nonqualified Stock Option	$3.69	2014-12-03	Common Stock (20933)	20933	Direct
Nonqualified Stock Option	$6.02	2016-11-20	Common Stock (17679)	17679	Direct

Footnotes

F1: Currently exercisable.

F2: The option vests 50% on 11-21-2011 and 50% on 11-21-2012

F3: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.95 - $9.97, inclusive. The reporting person undertakes to provide TGC Industries, Inc., any security holder of TGC, or the staff of the SEC, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote.

F4: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.95 - $10.03, inclusive. The reporting person undertakes to provide TGC Industries, Inc., any security holder of TGC, or the staff of the SEC, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote.

F5: Adjusted to reflect the five percent stock dividend paid to all shareholders of record on May 14, 2012.