INTEGRYS ENERGY GROUP INC

CUSIP: 45822P105 Class: COM

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

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

Q1 2015
Shares 10,243 Value ($000) $738 Avg Close — Range —
Q4 2014
Shares 13,001 Value ($000) $1,012 Avg Close — Range —
Q3 2014
Shares 13,088 Value ($000) $848 Avg Close — Range —
Q2 2014
Shares 13,173 Value ($000) $937 Avg Close — Range —
Q1 2014
Shares 13,256 Value ($000) $791 Avg Close — Range —
Q4 2013
Shares 13,236 Value ($000) $720 Avg Close — Range —
Q3 2013
Shares 15,031 Value ($000) $840 Avg Close — Range —
Q2 2013
Shares 16,682 Value ($000) $976 Avg Close — Range —