DAWSON GEOPHYSICAL CO — Director's Dealing 2013

Mar 18, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TGC INDUSTRIES INC (TGE)
CIK: 0000799165
Period of Report: 2013-03-14

Reporting Person: Winn Daniel G (Exec Vice President)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-03-14	Common Stock	M	34729	$2.91	Acquired	87596	Direct
2013-03-14	Common Stock	F	9749	$10.37	Disposed	77847	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-03-14	Incentive Stock Option	$2.91	M	34729	Disposed	2013-10-23	Common Stock (34729)	Direct
2013-03-14	Incentive Stock Option (reload)	$10.37	A	9749	Acquired	2013-10-23	Common Stock (9749)	Direct

Footnotes

F1: Currently exercisable.

F2: Not applicable.