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.

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Historical Stock Price — 1999

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1999-12-31$13.75$32.2085,400
1999-12-30$13.78$32.28159,800
1999-12-29$13.88$32.50146,200
1999-12-28$14.03$32.86157,400
1999-12-27$13.81$32.35187,800
1999-12-23$13.81$32.35231,200
1999-12-22$13.81$32.35256,800
1999-12-21$13.81$32.35280,000
1999-12-20$13.63$31.91271,600
1999-12-17$13.50$31.62263,000
1999-12-16$13.50$31.62232,000
1999-12-15$13.50$31.62174,200
1999-12-14$13.22$30.96464,800
1999-12-13$13.09$30.67135,000
1999-12-10$13.38$31.33193,600
1999-12-09$13.66$31.98195,000
1999-12-08$13.59$31.84309,000
1999-12-07$13.75$32.20165,400
1999-12-06$13.69$32.06291,000
1999-12-03$13.53$31.69255,000
1999-12-02$13.59$31.84116,200
1999-12-01$13.56$31.77169,600
1999-11-30$13.53$31.69392,000
1999-11-29$12.94$30.30264,600
1999-11-26$13.16$30.8174,200
1999-11-24$13.28$31.11190,600
1999-11-23$13.25$31.03192,400
1999-11-22$13.44$31.47139,200
1999-11-19$13.72$32.13134,400
1999-11-18$13.81$32.35556,200
1999-11-17$14.03$32.86188,000
1999-11-16$14.25$33.38191,400
1999-11-15$14.25$33.38317,200
1999-11-12$13.97$32.72348,400
1999-11-11$13.88$32.50267,200
1999-11-10$13.91$32.57229,200
1999-11-09$13.91$32.57136,400
1999-11-08$14.00$32.79116,200
1999-11-05$14.22$33.30355,600
1999-11-04$14.00$32.79157,200
1999-11-03$14.00$32.79127,400
1999-11-02$14.03$32.86187,400
1999-11-01$13.91$32.57251,000
1999-10-29$13.59$31.84249,600
1999-10-28$13.75$32.20144,800
1999-10-27$13.59$31.84337,200
1999-10-26$13.41$30.813,925,800
1999-10-25$13.31$30.60594,000
1999-10-22$13.31$30.60212,400
1999-10-21$13.44$30.89181,200
1999-10-20$13.72$31.53105,400
1999-10-19$13.75$31.60110,200
1999-10-18$13.81$31.7572,600
1999-10-15$13.78$31.6899,200
1999-10-14$14.03$32.2581,000
1999-10-13$13.84$31.8286,200
1999-10-12$13.84$31.8289,800
1999-10-11$14.00$32.1899,200
1999-10-08$13.78$31.6898,200
1999-10-07$13.94$32.03151,000
1999-10-06$14.38$33.04206,200
1999-10-05$14.13$32.47106,400
1999-10-04$14.41$33.11238,800
1999-10-01$14.00$32.18247,800
1999-09-30$13.84$31.82151,000
1999-09-29$13.47$30.9678,000
1999-09-28$13.47$30.96123,800
1999-09-27$13.69$31.46194,000
1999-09-24$13.63$31.32140,200
1999-09-23$13.75$31.60115,800
1999-09-22$13.94$32.03117,400
1999-09-21$13.94$32.0384,000
1999-09-20$14.34$32.9773,800
1999-09-17$14.41$33.11105,000
1999-09-16$14.34$32.9792,600
1999-09-15$14.41$33.11131,000
1999-09-14$14.34$32.97144,400
1999-09-13$14.28$32.82143,400
1999-09-10$14.53$33.40100,200
1999-09-09$14.44$33.1885,000
1999-09-08$14.47$33.26232,000
1999-09-07$14.53$33.4061,600
1999-09-03$14.72$33.83182,000
1999-09-02$14.44$33.18196,400
1999-09-01$14.41$33.11191,000
1999-08-31$14.47$33.26298,000
1999-08-30$14.38$33.04235,400
1999-08-27$14.38$33.04244,600
1999-08-26$14.25$32.75233,800
1999-08-25$13.97$32.11209,800
1999-08-24$13.81$31.75102,200
1999-08-23$13.88$31.8972,800
1999-08-20$13.88$31.89126,400
1999-08-19$13.75$31.6075,200
1999-08-18$13.53$31.10138,600
1999-08-17$13.59$31.24155,800
1999-08-16$13.56$31.17330,800
1999-08-13$13.88$31.89122,800
1999-08-12$13.91$31.96103,600
1999-08-11$13.97$32.11303,800
1999-08-10$13.97$32.11119,800
1999-08-09$14.16$32.54136,600
1999-08-06$14.00$32.18110,000
1999-08-05$14.09$32.39136,600
1999-08-04$14.09$32.39229,000
1999-08-03$14.19$32.61196,800
1999-08-02$14.19$32.61167,800
1999-07-30$14.44$33.18164,400
1999-07-29$14.22$32.68161,000
1999-07-28$14.41$33.113,707,800
1999-07-27$14.94$33.76159,600
1999-07-26$14.97$33.8392,800
1999-07-23$14.94$33.76145,800
1999-07-22$14.97$33.83140,600
1999-07-21$14.91$33.69177,600
1999-07-20$14.81$33.4894,800
1999-07-19$14.78$33.41262,400
1999-07-16$14.63$33.0591,000
1999-07-15$14.84$33.55398,800
1999-07-14$14.63$33.0576,400
1999-07-13$14.59$32.98136,400
1999-07-12$14.66$33.12125,200
1999-07-09$14.72$33.26266,800
1999-07-08$14.78$33.41176,800
1999-07-07$14.59$32.9891,200
1999-07-06$14.53$32.84150,600
1999-07-02$14.66$33.12177,800
1999-07-01$14.53$32.84328,800
1999-06-30$14.19$32.06557,200
1999-06-29$14.94$33.76153,800
1999-06-28$14.97$33.8390,400
1999-06-25$14.72$33.26102,400
1999-06-24$14.75$33.33346,600
1999-06-23$14.84$33.55142,800
1999-06-22$14.97$33.83203,800
1999-06-21$15.03$33.9768,800
1999-06-18$15.19$34.32262,200
1999-06-17$15.03$33.97289,400
1999-06-16$15.09$34.11188,800
1999-06-15$15.22$34.39249,800
1999-06-14$15.09$34.11168,400
1999-06-11$14.81$33.4892,400
1999-06-10$14.91$33.69176,600
1999-06-09$14.97$33.83127,000
1999-06-08$14.78$33.41225,400
1999-06-07$15.06$34.04249,600
1999-06-04$15.00$33.90108,800
1999-06-03$14.81$33.48205,000
1999-06-02$14.91$33.69146,000
1999-06-01$14.94$33.76152,600
1999-05-28$15.09$34.11296,600
1999-05-27$15.03$33.97152,000
1999-05-26$15.19$34.32109,200
1999-05-25$15.06$34.04234,000
1999-05-24$15.06$34.04254,200
1999-05-21$14.72$33.26196,400
1999-05-20$14.66$33.12155,400
1999-05-19$14.72$33.26180,800
1999-05-18$14.66$33.12208,400
1999-05-17$14.81$33.48241,000
1999-05-14$14.63$33.05185,800
1999-05-13$14.94$33.76358,200
1999-05-12$14.38$32.49162,800
1999-05-11$14.25$32.20294,400
1999-05-10$14.31$32.35191,400
1999-05-07$14.44$32.63144,600
1999-05-06$14.44$32.63182,200
1999-05-05$14.34$32.42164,600
1999-05-04$14.31$32.35216,000
1999-05-03$14.53$32.84413,600
1999-04-30$14.47$32.70348,200
1999-04-29$14.56$32.91215,800
1999-04-28$14.59$32.98377,000
1999-04-27$14.53$32.284,399,600
1999-04-26$14.47$32.14612,200
1999-04-23$14.47$32.14418,000
1999-04-22$14.38$31.93851,800
1999-04-21$14.56$32.34158,400
1999-04-20$14.47$32.14230,200
1999-04-19$14.28$31.72212,200
1999-04-16$14.03$31.16199,200
1999-04-15$13.88$30.82197,200
1999-04-14$13.84$30.75177,000
1999-04-13$13.84$30.75275,200
1999-04-12$13.78$30.61179,400
1999-04-09$13.63$30.26147,800
1999-04-08$13.63$30.26118,600
1999-04-07$13.50$29.98243,800
1999-04-06$13.53$30.05214,000
1999-04-05$13.59$30.19166,800
1999-04-01$13.63$30.26163,600
1999-03-31$13.31$29.57423,000
1999-03-30$13.72$30.47156,600
1999-03-29$14.13$31.37361,800
1999-03-26$14.09$31.30220,800
1999-03-25$14.25$31.6590,800
1999-03-24$14.22$31.58571,600
1999-03-23$13.91$30.89212,400
1999-03-22$13.97$31.03177,600
1999-03-19$14.13$31.37222,600
1999-03-18$14.22$31.58172,400
1999-03-17$14.22$31.58111,200
1999-03-16$14.28$31.72267,400
1999-03-15$14.34$31.86117,600
1999-03-12$14.25$31.65258,600
1999-03-11$14.22$31.58301,400
1999-03-10$13.94$30.96261,800
1999-03-09$13.97$31.03142,800
1999-03-08$14.22$31.58160,000
1999-03-05$14.31$31.7981,200
1999-03-04$14.22$31.58127,200
1999-03-03$14.31$31.79126,600
1999-03-02$13.97$31.03165,200
1999-03-01$13.66$30.33149,000
1999-02-26$13.78$30.61145,400
1999-02-25$13.91$30.89113,400
1999-02-24$14.03$31.16119,800
1999-02-23$13.97$31.03156,600
1999-02-22$14.16$31.44129,600
1999-02-19$13.75$30.54186,800
1999-02-18$13.88$30.82166,800
1999-02-17$13.81$30.68426,000
1999-02-16$13.75$30.54235,800
1999-02-12$13.69$30.40119,400
1999-02-11$13.88$30.82158,400
1999-02-10$13.84$30.75235,400
1999-02-09$13.97$31.03373,200
1999-02-08$14.06$31.23172,600
1999-02-05$14.13$31.37154,200
1999-02-04$14.34$31.86125,000
1999-02-03$14.38$31.93165,200
1999-02-02$14.31$31.79707,000
1999-02-01$14.38$31.93214,200
1999-01-29$14.47$32.14108,600
1999-01-28$14.75$32.76113,800
1999-01-27$14.84$32.97225,800
1999-01-26$15.19$33.184,167,200
1999-01-25$15.22$33.25322,800
1999-01-22$15.16$33.11155,600
1999-01-21$15.19$33.18302,400
1999-01-20$14.94$32.63301,800
1999-01-19$15.00$32.77250,400
1999-01-15$15.09$32.97167,000
1999-01-14$15.13$33.04240,600
1999-01-13$15.19$33.18684,600
1999-01-12$15.44$33.72464,000
1999-01-11$15.22$33.25187,200
1999-01-08$15.41$33.66149,400
1999-01-07$15.47$33.79115,200
1999-01-06$15.56$34.00121,400
1999-01-05$15.69$34.27125,400
1999-01-04$16.00$34.95312,600