ALLIANT ENERGY CORP

CUSIP: 18802108 Class: Common Stock

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q3 2016
Shares 2,190 Value ($000) $84 Avg Close — Range —
Q1 2016
Shares 1,295 Value ($000) $96 Avg Close — Range —
Q2 2015
Shares 2,808 Value ($000) $162 Avg Close — Range —
Q1 2015
Shares 4,108 Value ($000) $259 Avg Close — Range —
Q2 2014
Shares 1,600 Value ($000) $97 Avg Close — Range —
Q1 2014
Shares 2,400 Value ($000) $136 Avg Close — Range —
Q4 2013
Shares 2,100 Value ($000) $108 Avg Close — Range —
Q3 2013
Shares 800 Value ($000) $40 Avg Close — Range —