PIONEER ENERGY SVCS CORP

CUSIP: 723664108 Class: COM

MARTINGALE ASSET MANAGEMENT L P's Holding History (CIK: 0000936944)

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

Q2 2015
Shares 188,082 Value ($000) $1,193 Avg Close — Range —
Q1 2015
Shares 140,108 Value ($000) $760 Avg Close — Range —
Q4 2014
Shares 140,758 Value ($000) $780 Avg Close — Range —
Q3 2014
Shares 91,743 Value ($000) $1,287 Avg Close — Range —
Q2 2014
Shares 95,542 Value ($000) $1,676 Avg Close — Range —
Q1 2014
Shares 91,421 Value ($000) $1,184 Avg Close — Range —