DAWSON GEOPHYSICAL CO — Director's Dealing 2013

Sep 17, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TGC INDUSTRIES INC (TGE)
CIK: 0000799165
Period of Report: 2013-09-13

Reporting Person: GARDNER HERBERT M (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-09-13	Common Stock	M	26812	$2.805	Acquired	712173	Direct
2013-09-13	Common Stock	F	9322	$8.07	Disposed	702851	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-09-13	Nonqualified Stock Option	$2.8055	M	26812	Disposed	2013-10-22	Common Stock (26812)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	80453	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: Includes 296,331 shares held in Reporting Persons IRA accounts.

F2: Reporting Person disclaims beneficial ownership of shares owned by the estate of spouse.

F3: Currently exercisable.

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