DAWSON GEOPHYSICAL CO

CUSIP: 239359102 Class: CMN

Swiss National Bank's Holding History (CIK: 0001582202)

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

Q3 2014
Shares 6,500 Value ($000) $118 Avg Close — Range —
Q2 2014
Shares 6,500 Value ($000) $186 Avg Close — Range —
Q1 2014
Shares 6,500 Value ($000) $182 Avg Close — Range —
Q4 2013
Shares 5,300 Value ($000) $179 Avg Close — Range —
Q3 2013
Shares 5,300 Value ($000) $172 Avg Close — Range —
Q2 2013
Shares 5,300 Value ($000) $195 Avg Close — Range —