PIONEER NAT RES CO

CUSIP: 723787AH0 Class: CNV

KEYBANK NATIONAL ASSOCIATION/OH's Holding History (CIK: 0001089877)

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

Q1 2013
Shares 7,556,000 Value ($000) $16,335 Avg Close — Range —
Q4 2012
Shares 6,443,000 Value ($000) $11,517 Avg Close — Range —