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 — 1990

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1990-12-31$12.25$16.04110,400
1990-12-28$12.13$15.8823,600
1990-12-27$12.25$16.0420,000
1990-12-26$12.31$16.128,200
1990-12-24$12.31$16.1252,000
1990-12-21$12.38$16.21102,800
1990-12-20$12.38$16.2186,200
1990-12-19$12.31$16.1242,200
1990-12-18$12.25$16.0418,600
1990-12-17$12.19$15.9654,000
1990-12-14$12.25$16.0436,800
1990-12-13$12.25$16.04102,000
1990-12-12$12.25$16.0440,400
1990-12-11$12.25$16.0415,200
1990-12-10$12.44$16.2911,000
1990-12-07$12.44$16.2939,200
1990-12-06$12.31$16.1235,600
1990-12-05$12.38$16.2130,000
1990-12-04$12.25$16.0435,600
1990-12-03$12.38$16.21275,200
1990-11-30$12.13$15.8832,600
1990-11-29$12.06$15.8028,800
1990-11-28$12.00$15.7190,600
1990-11-27$12.00$15.7185,400
1990-11-26$12.00$15.7158,200
1990-11-23$12.00$15.717,800
1990-11-21$12.00$15.7184,200
1990-11-20$11.81$15.4742,400
1990-11-19$11.75$15.3950,600
1990-11-16$11.88$15.5557,600
1990-11-15$11.88$15.5520,200
1990-11-14$11.94$15.6353,000
1990-11-13$11.94$15.6315,000
1990-11-12$11.94$15.6394,600
1990-11-09$11.94$15.63225,200
1990-11-08$11.63$15.2224,800
1990-11-07$11.56$15.1425,200
1990-11-06$11.75$15.3938,800
1990-11-05$11.88$15.5527,600
1990-11-02$11.75$15.3921,400
1990-11-01$11.75$15.3939,800
1990-10-31$11.50$15.0654,200
1990-10-30$11.50$15.0612,400
1990-10-29$11.50$15.0615,600
1990-10-26$11.44$14.98183,400
1990-10-25$11.50$15.06156,800
1990-10-24$11.63$14.94357,200
1990-10-23$11.63$14.9451,600
1990-10-22$11.81$15.1825,600
1990-10-19$11.75$15.1049,800
1990-10-18$11.56$14.8697,200
1990-10-17$11.44$14.7019,000
1990-10-16$11.31$14.5456,600
1990-10-15$11.44$14.7032,000
1990-10-12$11.44$14.7084,600
1990-10-11$11.44$14.7039,600
1990-10-10$11.19$14.3825,600
1990-10-09$11.44$14.7044,400
1990-10-08$11.25$14.4627,600
1990-10-05$11.06$14.2214,000
1990-10-04$11.06$14.2224,800
1990-10-03$10.88$13.9745,800
1990-10-02$10.81$13.8928,000
1990-10-01$10.63$13.6523,600
1990-09-28$10.38$13.3327,000
1990-09-27$10.44$13.4114,000
1990-09-26$10.50$13.4963,000
1990-09-25$10.56$13.5752,800
1990-09-24$10.44$13.4131,600
1990-09-21$10.56$13.5725,200
1990-09-20$10.56$13.5731,400
1990-09-19$10.44$13.4129,000
1990-09-18$10.25$13.1738,600
1990-09-17$10.31$13.2575,600
1990-09-14$10.06$12.9352,800
1990-09-13$10.50$13.4934,800
1990-09-12$10.75$13.8123,200
1990-09-11$10.88$13.9728,400
1990-09-10$10.88$13.9729,400
1990-09-07$10.81$13.8977,800
1990-09-06$10.88$13.9729,600
1990-09-05$10.88$13.9718,800
1990-09-04$10.75$13.8131,200
1990-08-31$10.63$13.6533,600
1990-08-30$10.81$13.8989,800
1990-08-29$10.88$13.9749,800
1990-08-28$10.63$13.6560,800
1990-08-27$10.44$13.4136,600
1990-08-24$10.25$13.1730,000
1990-08-23$10.25$13.1726,400
1990-08-22$10.44$13.4164,000
1990-08-21$10.44$13.4142,000
1990-08-20$10.69$13.7396,800
1990-08-17$10.94$14.0654,200
1990-08-16$10.88$13.9728,400
1990-08-15$10.94$14.06108,800
1990-08-14$11.00$14.1423,800
1990-08-13$11.00$14.14117,000
1990-08-10$11.00$14.1457,000
1990-08-09$10.75$13.8157,600
1990-08-08$10.81$13.8949,400
1990-08-07$10.75$13.8185,200
1990-08-06$10.94$14.0686,200
1990-08-03$11.00$14.1433,800
1990-08-02$11.13$14.3015,600
1990-08-01$10.94$14.06471,800
1990-07-31$10.94$14.0666,600
1990-07-30$10.88$13.9751,800
1990-07-27$10.88$13.9726,200
1990-07-26$10.94$14.06280,800
1990-07-25$11.00$14.14325,000
1990-07-24$11.00$13.86355,800
1990-07-23$10.81$13.6250,800
1990-07-20$11.00$13.8677,200
1990-07-19$10.88$13.7044,600
1990-07-18$10.81$13.6260,600
1990-07-17$10.94$13.7848,200
1990-07-16$11.00$13.8624,200
1990-07-13$11.00$13.8650,200
1990-07-12$11.00$13.8686,000
1990-07-11$11.00$13.8612,400
1990-07-10$11.25$14.1719,600
1990-07-09$11.06$13.9332,800
1990-07-06$11.00$13.8613,200
1990-07-05$11.06$13.9321,200
1990-07-03$11.13$14.0115,200
1990-07-02$11.13$14.0151,600
1990-06-29$11.19$14.0919,400
1990-06-28$11.06$13.938,800
1990-06-27$11.06$13.9364,800
1990-06-26$11.06$13.9312,400
1990-06-25$11.06$13.9338,600
1990-06-22$11.00$13.8647,000
1990-06-21$10.94$13.7825,800
1990-06-20$11.00$13.8618,800
1990-06-19$11.31$14.2526,000
1990-06-18$11.31$14.2512,200
1990-06-15$11.38$14.3320,800
1990-06-14$11.44$14.418,800
1990-06-13$11.44$14.4116,200
1990-06-12$11.44$14.4114,000
1990-06-11$11.44$14.4110,200
1990-06-08$11.44$14.4140,800
1990-06-07$11.38$14.3314,000
1990-06-06$11.31$14.2515,600
1990-06-05$11.19$14.0950,600
1990-06-04$11.25$14.1753,600
1990-06-01$11.00$13.8621,800
1990-05-31$11.06$13.9317,600
1990-05-30$11.25$14.1713,400
1990-05-29$11.25$14.1724,400
1990-05-25$11.38$14.3321,000
1990-05-24$11.50$14.4918,200
1990-05-23$11.50$14.4924,400
1990-05-22$11.56$14.5663,600
1990-05-21$11.38$14.3327,800
1990-05-18$11.50$14.4963,800
1990-05-17$11.81$14.8817,200
1990-05-16$11.81$14.8895,400
1990-05-15$11.81$14.8838,600
1990-05-14$11.81$14.8831,800
1990-05-11$11.81$14.88145,000
1990-05-10$11.69$14.7236,000
1990-05-09$11.69$14.7257,800
1990-05-08$11.69$14.7238,200
1990-05-07$11.75$14.8053,400
1990-05-04$11.50$14.4921,600
1990-05-03$11.31$14.259,800
1990-05-02$11.31$14.2573,800
1990-05-01$11.38$14.3327,000
1990-04-30$11.31$14.2554,600
1990-04-27$11.19$14.0914,600
1990-04-26$11.19$14.0916,200
1990-04-25$11.19$14.09176,000
1990-04-24$10.94$13.78124,000
1990-04-23$11.19$13.8227,000
1990-04-20$11.19$13.8225,600
1990-04-19$11.31$13.9720,200
1990-04-18$11.31$13.9723,800
1990-04-17$11.38$14.0518,600
1990-04-16$11.50$14.2014,400
1990-04-12$11.44$14.139,600
1990-04-11$11.50$14.204,800
1990-04-10$11.38$14.0530,400
1990-04-09$11.38$14.0514,400
1990-04-06$11.44$14.13106,200
1990-04-05$11.25$13.9022,600
1990-04-04$11.38$14.0529,000
1990-04-03$11.31$13.9717,000
1990-04-02$11.44$14.1313,400
1990-03-30$11.44$14.1344,200
1990-03-29$11.31$13.9735,400
1990-03-28$11.25$13.9036,200
1990-03-27$11.19$13.8237,000
1990-03-26$11.19$13.8238,800
1990-03-23$11.19$13.828,800
1990-03-22$11.06$13.6679,600
1990-03-21$11.38$14.0520,400
1990-03-20$11.44$14.1312,000
1990-03-19$11.44$14.139,200
1990-03-16$11.44$14.1372,800
1990-03-15$11.38$14.0518,800
1990-03-14$11.44$14.13204,800
1990-03-13$11.56$14.2839,800
1990-03-12$11.69$14.4461,200
1990-03-09$11.44$14.1327,000
1990-03-08$11.38$14.0518,800
1990-03-07$11.25$13.9012,200
1990-03-06$11.25$13.9041,200
1990-03-05$11.19$13.8231,600
1990-03-02$11.19$13.8228,000
1990-03-01$11.25$13.9051,200
1990-02-28$11.38$14.0517,600
1990-02-27$11.25$13.909,000
1990-02-26$11.25$13.9026,600
1990-02-23$11.13$13.7412,800
1990-02-22$11.25$13.9025,200
1990-02-21$11.19$13.8223,600
1990-02-20$11.25$13.90113,600
1990-02-16$11.69$14.449,400
1990-02-15$11.56$14.2826,200
1990-02-14$11.31$13.9717,200
1990-02-13$11.38$14.0516,800
1990-02-12$11.50$14.2085,600
1990-02-09$11.25$13.9044,000
1990-02-08$11.44$14.1323,000
1990-02-07$11.44$14.1326,800
1990-02-06$11.31$13.9726,000
1990-02-05$11.25$13.9011,000
1990-02-02$11.13$13.7424,600
1990-02-01$11.19$13.8223,000
1990-01-31$11.06$13.6632,200
1990-01-30$11.25$13.9036,400
1990-01-29$11.38$14.0526,000
1990-01-26$11.31$13.97108,000
1990-01-25$11.38$14.0584,800
1990-01-24$11.44$13.8635,000
1990-01-23$11.50$13.9322,400
1990-01-22$11.56$14.0119,000
1990-01-19$11.69$14.1622,000
1990-01-18$11.63$14.0986,200
1990-01-17$11.69$14.1610,600
1990-01-16$11.69$14.1612,000
1990-01-15$11.69$14.1621,800
1990-01-12$11.81$14.3180,000
1990-01-11$11.88$14.397,800
1990-01-10$11.88$14.3992,800
1990-01-09$11.88$14.3934,400
1990-01-08$11.88$14.3913,000
1990-01-05$12.13$14.6999,200
1990-01-04$12.38$14.9924,000
1990-01-03$12.44$15.0795,200
1990-01-02$12.13$14.6945,000