DAWSON GEOPHYSICAL CO — Director's Dealing 2013

Sep 23, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TGC INDUSTRIES INC (TGE)
CIK: 0000799165
Period of Report: 2013-09-18

Reporting Person: BARRETT WILLIAM J (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-09-18	Common Stock	M	26812	$2.8055	Acquired	1892524	Direct
2013-09-18	Common Stock	F	9247	$8.135	Disposed	1883277	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-09-18	Nonqualified Stock Option	$2.8055	M	26812	Disposed	2013-10-22	Common Stock (26812)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	177745	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Nonqualified Stock Option	$3.52	2014-12-03	Common Stock (21979)	21979	Direct
Nonqualified Stock Option	$5.73	2016-11-20	Common Stock (18562)	18562	Direct
Nonqualified Stock Option	$5.60	2017-08-06	Common Stock (19687)	19687	Direct

Footnotes

F1: Reporting Person disclaims beneficial ownership of common stock owned by spouse.

F2: Includes 1,808,549 shares of common stock held in Reporting Persons IRA accounts.

F3: Currently exercisable.

F4: Adjusted for the five percent stock dividend paid to all shareholders of record on May 14, 2013.