WESTERN GAS PARTNERS LP

CUSIP: 958254104 Class: COM

MASON STREET ADVISORS, LLC's Holding History (CIK: 0001167711)

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

Q4 2014
Shares 200,000 Value ($000) $14,610 Avg Close — Range —
Q3 2014
Shares 50,000 Value ($000) $3,750 Avg Close — Range —
Q2 2014
Shares 50,000 Value ($000) $3,824 Avg Close — Range —
Q1 2014
Shares 50,000 Value ($000) $3,310 Avg Close — Range —
Q4 2013
Shares 50,000 Value ($000) $3,084 Avg Close — Range —
Q3 2013
Shares 100,214 Value ($000) $6,026 Avg Close — Range —
Q2 2013
Shares 142,152 Value ($000) $9,224 Avg Close — Range —