PARKER DRILLING CO

CUSIP: 701081101 Class: COMMON STOCK

COMERICA BANK's Holding History (CIK: 0000901541)

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

Q1 2014
Shares 11,030 Value ($000) $78 Avg Close — Range —
Q4 2013
Shares 10,991 Value ($000) $89 Avg Close — Range —
Q3 2013
Shares 11,027 Value ($000) $63 Avg Close — Range —
Q2 2013
Shares 11,132 Value ($000) $56 Avg Close — Range —