DAWSON GEOPHYSICAL CO

CUSIP: 239359102 Class: CMN

FIRST TRUST ADVISORS LP's Holding History (CIK: 0001125816)

Note: Option positions (PUT/CALL) are excluded.

Q4 2013
Shares 6,706 Value ($000) $227 Avg Close — Range —
Q3 2013
Shares 11,087 Value ($000) $360 Avg Close — Range —