WISCONSIN ENERGY CORP

CUSIP: 976657106 Class: COM

Robeco Institutional Asset Management B.V.'s Holding History (CIK: 0001418773)

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

Q1 2015
Shares 308,719 Value ($000) $15,280 Avg Close — Range —
Q4 2014
Shares 320,201 Value ($000) $16,888 Avg Close — Range —
Q3 2014
Shares 353,246 Value ($000) $15,189 Avg Close — Range —
Q2 2014
Shares 353,246 Value ($000) $16,574 Avg Close — Range —
Q1 2014
Shares 337,020 Value ($000) $15,688 Avg Close — Range —
Q4 2013
Shares 275,697 Value ($000) $11,398 Avg Close — Range —
Q3 2013
Shares 271,208 Value ($000) $10,951 Avg Close — Range —
Q2 2013
Shares 244,443 Value ($000) $10,019 Avg Close — Range —