NASDAQ:LNT | Historical Stock Price | ALLIANT ENERGY CORP

Complete retained daily price history on its own workbook tab. Split-adjusted close keeps every historical share price on one comparable split basis. Cumulative dividend-reinvested close is the daily close of a rebased total-return index: it starts with one share at the earliest retained close, reinvests every distribution, and normalizes every forward and reverse split exactly once. Admitted exchange opening prices remain a distinct current-session series.

Available history
1973-02-21 to 2026-09-04
Data captured

Stock Price Chart

Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close

$3.27$9.17$25.74$72.25$202.84$569.441973-02-212026-08-27

Logarithmic scale. Both lines share the same starting value for the selected range.

View year

Historical Stock Price — 2005

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2005-12-30$14.02$46.97722,600
2005-12-29$14.01$46.93495,400
2005-12-28$13.94$46.70659,400
2005-12-27$14.03$47.00357,800
2005-12-23$14.14$47.35342,600
2005-12-22$14.15$47.40458,600
2005-12-21$14.07$47.121,276,000
2005-12-20$14.29$47.87591,400
2005-12-19$14.17$47.47679,600
2005-12-16$14.36$48.09747,000
2005-12-15$14.37$48.12752,600
2005-12-14$14.38$48.16723,200
2005-12-13$14.23$47.671,202,600
2005-12-12$14.32$47.97878,600
2005-12-09$14.46$48.43523,000
2005-12-08$14.30$47.891,060,000
2005-12-07$14.25$47.74830,800
2005-12-06$14.18$47.49727,600
2005-12-05$14.27$47.81893,600
2005-12-02$14.28$47.82781,200
2005-12-01$14.16$47.441,895,400
2005-11-30$14.18$47.491,414,600
2005-11-29$14.10$47.241,082,400
2005-11-28$14.05$47.07921,000
2005-11-25$14.09$47.20198,600
2005-11-23$14.03$46.981,156,200
2005-11-22$13.93$46.651,553,200
2005-11-21$13.94$46.70700,600
2005-11-18$13.80$46.23758,800
2005-11-17$13.77$46.13680,800
2005-11-16$13.65$45.73650,200
2005-11-15$13.64$45.682,052,600
2005-11-14$13.50$45.211,101,000
2005-11-11$13.43$44.991,008,400
2005-11-10$13.49$45.191,533,000
2005-11-09$13.39$44.84938,200
2005-11-08$13.27$44.461,118,400
2005-11-07$13.32$44.621,464,400
2005-11-04$13.33$44.661,379,800
2005-11-03$13.00$43.551,042,400
2005-11-02$13.03$43.631,033,800
2005-11-01$13.05$43.721,117,600
2005-10-31$13.23$44.301,389,000
2005-10-28$13.09$43.841,370,400
2005-10-27$12.94$43.351,784,400
2005-10-26$13.26$43.981,237,400
2005-10-25$13.48$44.691,099,800
2005-10-24$13.56$44.98711,400
2005-10-21$13.32$44.181,039,800
2005-10-20$13.12$43.501,179,600
2005-10-19$13.38$44.38997,400
2005-10-18$13.55$44.94709,400
2005-10-17$13.71$45.47811,200
2005-10-14$13.64$45.23643,200
2005-10-13$13.63$45.21666,000
2005-10-12$13.90$46.10822,400
2005-10-11$14.17$46.98868,400
2005-10-10$14.15$46.92513,800
2005-10-07$14.35$47.60631,400
2005-10-06$14.19$47.05866,200
2005-10-05$14.30$47.43580,600
2005-10-04$14.77$48.97710,800
2005-10-03$14.91$49.45858,600
2005-09-30$14.57$48.311,091,000
2005-09-29$14.66$48.61944,800
2005-09-28$14.51$48.11361,000
2005-09-27$14.55$48.26545,200
2005-09-26$14.55$48.24548,800
2005-09-23$14.53$48.18539,000
2005-09-22$14.62$48.48490,800
2005-09-21$14.58$48.36652,000
2005-09-20$14.93$49.52652,000
2005-09-19$14.98$49.69713,200
2005-09-16$15.06$49.95953,800
2005-09-15$15.03$49.84456,800
2005-09-14$15.02$49.80442,600
2005-09-13$15.08$50.02875,400
2005-09-12$15.12$50.15669,000
2005-09-09$15.17$50.32744,200
2005-09-08$15.08$50.00382,600
2005-09-07$15.12$50.131,490,200
2005-09-06$15.20$50.40759,000
2005-09-02$15.18$50.35783,800
2005-09-01$15.15$50.25817,800
2005-08-31$15.03$49.841,191,600
2005-08-30$14.80$49.09819,400
2005-08-29$15.04$49.87669,800
2005-08-26$14.96$49.62676,400
2005-08-25$15.00$49.74385,000
2005-08-24$14.87$49.32749,600
2005-08-23$14.84$49.221,553,000
2005-08-22$14.72$48.82708,400
2005-08-19$14.64$48.56477,200
2005-08-18$14.72$48.81637,600
2005-08-17$14.47$48.00517,800
2005-08-16$14.53$48.19529,600
2005-08-15$14.73$48.84761,000
2005-08-12$14.68$48.67547,800
2005-08-11$14.63$48.51966,800
2005-08-10$14.30$47.43930,200
2005-08-09$14.18$47.02787,800
2005-08-08$14.22$47.17827,400
2005-08-05$14.66$48.63998,600
2005-08-04$14.71$48.77610,200
2005-08-03$14.64$48.56338,800
2005-08-02$14.53$48.18374,400
2005-08-01$14.44$47.90481,400
2005-07-29$14.55$48.26685,400
2005-07-28$14.54$48.21304,000
2005-07-27$14.37$47.651,224,200
2005-07-26$14.39$47.291,366,400
2005-07-25$14.48$47.591,007,800
2005-07-22$14.48$47.59799,000
2005-07-21$14.37$47.231,015,600
2005-07-20$14.35$47.15551,600
2005-07-19$14.25$46.83376,200
2005-07-18$14.17$46.55428,200
2005-07-15$14.20$46.65334,000
2005-07-14$14.22$46.73875,800
2005-07-13$14.22$46.72575,600
2005-07-12$14.35$47.16444,800
2005-07-11$14.41$47.36325,800
2005-07-08$14.28$46.93283,800
2005-07-07$14.08$46.27807,600
2005-07-06$14.13$46.42540,800
2005-07-05$14.31$47.01466,200
2005-07-01$14.24$46.80526,200
2005-06-30$14.08$46.26435,000
2005-06-29$14.05$46.18529,400
2005-06-28$14.03$46.09404,600
2005-06-27$13.81$45.39415,800
2005-06-24$13.63$44.78485,600
2005-06-23$13.79$45.32377,400
2005-06-22$13.93$45.77298,800
2005-06-21$13.82$45.42434,200
2005-06-20$13.94$45.81263,800
2005-06-17$13.91$45.70987,800
2005-06-16$13.88$45.60439,600
2005-06-15$13.83$45.44483,200
2005-06-14$13.82$45.42394,400
2005-06-13$13.82$45.40621,600
2005-06-10$13.70$45.01665,600
2005-06-09$13.80$45.34393,600
2005-06-08$13.70$45.03586,400
2005-06-07$13.76$45.22524,600
2005-06-06$13.67$44.911,392,800
2005-06-03$13.75$45.19657,600
2005-06-02$13.80$45.35591,400
2005-06-01$13.89$45.65399,600
2005-05-31$13.80$45.35819,800
2005-05-27$13.75$45.19642,200
2005-05-26$13.70$45.03796,000
2005-05-25$13.65$44.851,287,600
2005-05-24$13.53$44.451,518,000
2005-05-23$13.62$44.76557,000
2005-05-20$13.62$44.76526,200
2005-05-19$13.68$44.941,103,200
2005-05-18$13.76$45.22986,000
2005-05-17$13.54$44.481,000,200
2005-05-16$13.60$44.701,059,400
2005-05-13$13.31$43.731,855,800
2005-05-12$13.36$43.91873,000
2005-05-11$13.45$44.201,377,200
2005-05-10$13.38$43.961,352,200
2005-05-09$13.39$44.011,134,200
2005-05-06$13.45$44.191,124,400
2005-05-05$13.50$44.351,569,200
2005-05-04$13.17$43.27879,600
2005-05-03$13.08$42.97918,000
2005-05-02$13.10$43.041,189,000
2005-04-29$13.17$43.28662,200
2005-04-28$13.24$43.511,246,000
2005-04-27$13.27$43.611,064,600
2005-04-26$13.31$43.30888,400
2005-04-25$13.29$43.231,508,400
2005-04-22$13.09$42.602,355,400
2005-04-21$13.20$42.95983,400
2005-04-20$13.11$42.64561,800
2005-04-19$13.20$42.95772,600
2005-04-18$13.12$42.69711,000
2005-04-15$13.22$43.001,171,800
2005-04-14$13.34$43.391,297,400
2005-04-13$13.59$44.211,194,800
2005-04-12$13.73$44.681,039,400
2005-04-11$13.58$44.19396,000
2005-04-08$13.50$43.93343,000
2005-04-07$13.56$44.13530,800
2005-04-06$13.58$44.19532,800
2005-04-05$13.63$44.35587,600
2005-04-04$13.60$44.241,189,400
2005-04-01$13.63$44.351,585,600
2005-03-31$13.39$43.57629,800
2005-03-30$13.21$42.97662,000
2005-03-29$12.98$42.24626,200
2005-03-28$13.22$43.02379,400
2005-03-24$13.21$42.99563,600
2005-03-23$13.23$43.04582,200
2005-03-22$13.26$43.13573,000
2005-03-21$13.53$44.03450,400
2005-03-18$13.65$44.421,128,200
2005-03-17$13.65$44.40614,600
2005-03-16$13.55$44.09651,000
2005-03-15$13.58$44.19567,200
2005-03-14$13.76$44.76699,200
2005-03-11$13.36$43.47397,200
2005-03-10$13.52$44.00525,800
2005-03-09$13.46$43.78516,800
2005-03-08$13.66$44.43682,800
2005-03-07$13.67$44.47743,200
2005-03-04$13.49$43.90478,200
2005-03-03$13.28$43.21404,400
2005-03-02$13.31$43.30360,400
2005-03-01$13.38$43.52540,600
2005-02-28$13.38$43.52597,400
2005-02-25$13.35$43.44936,000
2005-02-24$13.38$43.54649,800
2005-02-23$13.35$43.44982,000
2005-02-22$13.03$42.40735,000
2005-02-18$13.56$44.11646,800
2005-02-17$13.65$44.42814,000
2005-02-16$13.75$44.73770,000
2005-02-15$13.57$44.16519,600
2005-02-14$13.53$44.03594,600
2005-02-11$13.45$43.771,038,200
2005-02-10$13.47$43.831,355,000
2005-02-09$13.53$44.031,066,600
2005-02-08$13.75$44.73776,600
2005-02-07$13.80$44.89676,000
2005-02-04$13.91$45.25572,000
2005-02-03$13.67$44.481,235,600
2005-02-02$13.73$44.66570,600
2005-02-01$13.83$44.991,087,400
2005-01-31$13.75$44.741,014,000
2005-01-28$13.58$44.191,376,400
2005-01-27$14.14$46.001,287,000
2005-01-26$14.20$45.781,232,000
2005-01-25$14.04$45.25781,000
2005-01-24$14.22$45.83497,800
2005-01-21$14.12$45.51726,800
2005-01-20$14.13$45.54773,600
2005-01-19$14.03$45.23634,600
2005-01-18$14.13$45.54444,800
2005-01-14$14.12$45.52542,800
2005-01-13$13.95$44.97611,200
2005-01-12$13.89$44.78615,600
2005-01-11$14.00$45.14565,200
2005-01-10$13.99$45.10827,800
2005-01-07$13.92$44.86323,600
2005-01-06$13.95$44.97315,800
2005-01-05$13.91$44.83563,600
2005-01-04$13.99$45.10380,400
2005-01-03$14.05$45.30582,200