WESTERN GAS EQUITY PARTNERS

CUSIP: 95825R103 Class: CMN

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

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

Q4 2014
Shares 30,460 Value ($000) $1,835 Avg Close — Range —
Q3 2014
Shares 65,000 Value ($000) $3,961 Avg Close — Range —
Q2 2014
Shares 100,000 Value ($000) $6,270 Avg Close — Range —
Q1 2014
Shares 215,000 Value ($000) $10,559 Avg Close — Range —
Q4 2013
Shares 200,000 Value ($000) $7,902 Avg Close — Range —
Q3 2013
Shares 200,000 Value ($000) $7,438 Avg Close — Range —
Q2 2013
Shares 200,000 Value ($000) $8,234 Avg Close — Range —