WILLIAMS PARTNERS L P

CUSIP: 96950F104 Class: COM UNIT L P

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

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

Q4 2014
Shares 514,860 Value ($000) $23,040 Avg Close — Range —
Q3 2014
Shares 204,662 Value ($000) $10,857 Avg Close — Range —
Q2 2014
Shares 207,896 Value ($000) $11,287 Avg Close — Range —
Q1 2014
Shares 196,086 Value ($000) $9,989 Avg Close — Range —
Q4 2013
Shares 120,796 Value ($000) $6,144 Avg Close — Range —