PIONEER ENERGY SVCS CORP

CUSIP: 723664108 Class: COM

Grantham, Mayo, Van Otterloo & Co. LLC's Holding History (CIK: 0001352662)

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

Q1 2014
Shares 32,400 Value ($000) $420 Avg Close — Range —
Q4 2013
Shares 46,200 Value ($000) $370 Avg Close — Range —
Q3 2013
Shares 44,500 Value ($000) $334 Avg Close — Range —
Q2 2013
Shares 37,800 Value ($000) $250 Avg Close — Range —