PIONEER NAT RES CO

CUSIP: 723787107 Class: COM

WASATCH ADVISORS LP's Holding History (CIK: 0000814133)

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

Q1 2015
Shares 313,173 Value ($000) $51,207 Avg Close — Range —
Q4 2014
Shares 343,973 Value ($000) $51,200 Avg Close — Range —