WISCONSIN ENERGY CORP

CUSIP: 976657106 Class: COM

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

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

Q1 2015
Shares 29,042 Value ($000) $1,438 Avg Close — Range —
Q4 2014
Shares 36,674 Value ($000) $1,934 Avg Close — Range —
Q3 2014
Shares 36,909 Value ($000) $1,587 Avg Close — Range —
Q2 2014
Shares 37,015 Value ($000) $1,737 Avg Close — Range —
Q1 2014
Shares 37,408 Value ($000) $1,741 Avg Close — Range —
Q4 2013
Shares 37,598 Value ($000) $1,554 Avg Close — Range —
Q3 2013
Shares 43,103 Value ($000) $1,740 Avg Close — Range —
Q2 2013
Shares 48,240 Value ($000) $1,977 Avg Close — Range —