INTEGRYS ENERGY GROUP INC

CUSIP: 45822P105 Class: COM

STATE OF WISCONSIN INVESTMENT BOARD's Holding History (CIK: 0000854157)

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

Q1 2015
Shares 128,015 Value ($000) $9,220 Avg Close — Range —
Q4 2014
Shares 62,385 Value ($000) $4,857 Avg Close — Range —
Q3 2014
Shares 141,325 Value ($000) $9,161 Avg Close — Range —
Q2 2014
Shares 92,986 Value ($000) $6,614 Avg Close — Range —
Q1 2014
Shares 94,899 Value ($000) $5,661 Avg Close — Range —
Q4 2013
Shares 94,869 Value ($000) $5,162 Avg Close — Range —
Q3 2013
Shares 96,529 Value ($000) $5,395 Avg Close — Range —
Q2 2013
Shares 101,059 Value ($000) $5,915 Avg Close — Range —