PIONEER ENERGY SVCS CORP

CUSIP: 723664108 Class: COM

Robeco Institutional Asset Management B.V.'s Holding History (CIK: 0001418773)

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

Q1 2015
Shares 33,240 Value ($000) $180 Avg Close — Range —
Q4 2014
Shares 33,240 Value ($000) $184 Avg Close — Range —
Q3 2014
Shares 92,436 Value ($000) $1,295 Avg Close — Range —
Q2 2014
Shares 78,944 Value ($000) $1,384 Avg Close — Range —