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 — 1991

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1991-12-31$16.38$22.9533,800
1991-12-30$16.25$22.7750,000
1991-12-27$16.00$22.4218,600
1991-12-26$16.00$22.4225,000
1991-12-24$15.69$21.9912,200
1991-12-23$15.56$21.8135,000
1991-12-20$15.44$21.6431,000
1991-12-19$15.19$21.2938,000
1991-12-18$15.06$21.1125,800
1991-12-17$15.13$21.2021,800
1991-12-16$15.13$21.2053,400
1991-12-13$15.25$21.3750,600
1991-12-12$15.19$21.2935,000
1991-12-11$15.13$21.2030,800
1991-12-10$15.06$21.1138,800
1991-12-09$15.00$21.02113,600
1991-12-06$15.13$21.2033,200
1991-12-05$15.19$21.2918,800
1991-12-04$15.13$21.2023,000
1991-12-03$15.19$21.29188,200
1991-12-02$15.31$21.4655,200
1991-11-29$15.00$21.0210,800
1991-11-27$15.13$21.2060,400
1991-11-26$14.81$20.7620,600
1991-11-25$14.88$20.8519,600
1991-11-22$14.81$20.7638,200
1991-11-21$14.81$20.7629,000
1991-11-20$14.75$20.6741,800
1991-11-19$14.75$20.6740,800
1991-11-18$14.75$20.6771,800
1991-11-15$14.69$20.5824,200
1991-11-14$14.81$20.7630,200
1991-11-13$14.81$20.76148,400
1991-11-12$14.94$20.9438,200
1991-11-11$14.63$20.5031,000
1991-11-08$14.63$20.5026,600
1991-11-07$14.63$20.5059,400
1991-11-06$14.75$20.6728,400
1991-11-05$14.69$20.5824,400
1991-11-04$14.56$20.4115,200
1991-11-01$14.50$20.3220,400
1991-10-31$14.50$20.32261,400
1991-10-30$14.31$20.0635,000
1991-10-29$14.31$20.06173,600
1991-10-28$14.13$19.80382,800
1991-10-25$14.13$19.8042,600
1991-10-24$14.44$19.9222,400
1991-10-23$14.56$20.0950,200
1991-10-22$14.44$19.9228,800
1991-10-21$14.50$20.0151,200
1991-10-18$14.44$19.92128,800
1991-10-17$14.81$20.4422,800
1991-10-16$14.88$20.5260,800
1991-10-15$14.94$20.6124,600
1991-10-14$14.88$20.5235,000
1991-10-11$14.81$20.4431,400
1991-10-10$14.81$20.4440,600
1991-10-09$14.75$20.3544,200
1991-10-08$14.88$20.5284,400
1991-10-07$14.88$20.5243,200
1991-10-04$14.94$20.6129,000
1991-10-03$14.94$20.6122,400
1991-10-02$14.94$20.6157,400
1991-10-01$15.00$20.7028,800
1991-09-30$15.00$20.7043,800
1991-09-27$14.75$20.3523,600
1991-09-26$14.50$20.0120,000
1991-09-25$14.50$20.0118,600
1991-09-24$14.50$20.0145,200
1991-09-23$14.44$19.9216,400
1991-09-20$14.44$19.9262,800
1991-09-19$14.25$19.6671,600
1991-09-18$14.31$19.7518,400
1991-09-17$14.25$19.6664,600
1991-09-16$14.13$19.4945,400
1991-09-13$13.88$19.1433,800
1991-09-12$13.94$19.2334,200
1991-09-11$14.00$19.3240,600
1991-09-10$14.06$19.4076,000
1991-09-09$14.25$19.6619,400
1991-09-06$14.13$19.4913,200
1991-09-05$14.13$19.4929,800
1991-09-04$14.19$19.5733,800
1991-09-03$14.25$19.6618,400
1991-08-30$14.06$19.4032,400
1991-08-29$14.00$19.3234,200
1991-08-28$14.06$19.4035,200
1991-08-27$14.13$19.4942,200
1991-08-26$14.13$19.4926,000
1991-08-23$14.31$19.7542,400
1991-08-22$14.38$19.8329,800
1991-08-21$14.38$19.8387,800
1991-08-20$14.31$19.7525,400
1991-08-19$14.25$19.6644,200
1991-08-16$14.31$19.7548,000
1991-08-15$14.31$19.7582,400
1991-08-14$14.06$19.4097,800
1991-08-13$13.94$19.23101,800
1991-08-12$13.63$18.8069,800
1991-08-09$13.63$18.8052,200
1991-08-08$13.56$18.7122,000
1991-08-07$13.50$18.63105,400
1991-08-06$13.44$18.5424,800
1991-08-05$13.63$18.8017,800
1991-08-02$13.44$18.5423,600
1991-08-01$13.25$18.2818,200
1991-07-31$13.25$18.2845,000
1991-07-30$13.25$18.2827,800
1991-07-29$13.19$18.1952,400
1991-07-26$13.19$18.19158,800
1991-07-25$13.25$18.28147,600
1991-07-24$13.31$18.0655,200
1991-07-23$13.38$18.1416,800
1991-07-22$13.38$18.1441,600
1991-07-19$13.44$18.23115,200
1991-07-18$13.44$18.23148,200
1991-07-17$13.19$17.8972,400
1991-07-16$13.19$17.8997,800
1991-07-15$13.19$17.8931,400
1991-07-12$13.00$17.6316,800
1991-07-11$13.00$17.6318,000
1991-07-10$12.75$17.2952,400
1991-07-09$12.69$17.2133,600
1991-07-08$12.75$17.2918,000
1991-07-05$12.94$17.5511,600
1991-07-03$12.94$17.5519,600
1991-07-02$13.00$17.6312,400
1991-07-01$12.81$17.3851,200
1991-06-28$12.88$17.4654,200
1991-06-27$12.81$17.3822,400
1991-06-26$12.81$17.3826,000
1991-06-25$12.75$17.2928,600
1991-06-24$12.69$17.2133,400
1991-06-21$12.75$17.2918,600
1991-06-20$12.94$17.5513,800
1991-06-19$13.06$17.7225,000
1991-06-18$12.94$17.5513,600
1991-06-17$13.00$17.6333,800
1991-06-14$13.06$17.7224,400
1991-06-13$13.13$17.8024,200
1991-06-12$13.19$17.8937,000
1991-06-11$13.13$17.8024,000
1991-06-10$12.94$17.5520,000
1991-06-07$13.13$17.8010,600
1991-06-06$13.25$17.9718,800
1991-06-05$13.25$17.9722,600
1991-06-04$13.25$17.9728,800
1991-06-03$13.19$17.8931,400
1991-05-31$13.25$17.9713,600
1991-05-30$13.31$18.0613,000
1991-05-29$13.38$18.1424,400
1991-05-28$13.25$17.9722,600
1991-05-24$13.25$17.9730,000
1991-05-23$13.25$17.9713,600
1991-05-22$13.25$17.9726,200
1991-05-21$13.31$18.0619,000
1991-05-20$13.38$18.1429,800
1991-05-17$13.38$18.1412,800
1991-05-16$13.44$18.2328,200
1991-05-15$13.31$18.0621,200
1991-05-14$13.19$17.8928,600
1991-05-13$13.38$18.1418,200
1991-05-10$13.31$18.0614,800
1991-05-09$13.44$18.2318,800
1991-05-08$13.25$17.9750,400
1991-05-07$13.25$17.9716,200
1991-05-06$13.19$17.8928,800
1991-05-03$13.06$17.7215,200
1991-05-02$13.25$17.9729,600
1991-05-01$13.13$17.8026,800
1991-04-30$12.88$17.4638,600
1991-04-29$12.88$17.4622,400
1991-04-26$12.81$17.3827,200
1991-04-25$12.81$17.38198,800
1991-04-24$12.81$17.38210,600
1991-04-23$13.31$17.7547,600
1991-04-22$13.06$17.4214,800
1991-04-19$13.00$17.33174,200
1991-04-18$13.13$17.5080,400
1991-04-17$13.50$18.0076,000
1991-04-16$13.50$18.0066,800
1991-04-15$13.50$18.0032,200
1991-04-12$13.50$18.0047,200
1991-04-11$13.44$17.9226,800
1991-04-10$13.44$17.9254,400
1991-04-09$13.19$17.5819,000
1991-04-08$13.38$17.8318,400
1991-04-05$13.31$17.7538,400
1991-04-04$13.44$17.9221,200
1991-04-03$13.50$18.0071,400
1991-04-02$13.44$17.9249,600
1991-04-01$13.13$17.5016,800
1991-03-28$13.13$17.5025,600
1991-03-27$13.13$17.5033,800
1991-03-26$13.00$17.3330,800
1991-03-25$12.88$17.1735,800
1991-03-22$12.94$17.2518,600
1991-03-21$12.94$17.2536,200
1991-03-20$12.69$16.9213,000
1991-03-19$12.75$17.0027,400
1991-03-18$12.69$16.9230,600
1991-03-15$12.69$16.9221,600
1991-03-14$12.75$17.0024,600
1991-03-13$12.69$16.9225,200
1991-03-12$12.81$17.0842,200
1991-03-11$12.81$17.0832,000
1991-03-08$12.88$17.1776,800
1991-03-07$13.00$17.3314,000
1991-03-06$13.13$17.5018,600
1991-03-05$13.19$17.5820,200
1991-03-04$13.19$17.5856,800
1991-03-01$13.19$17.5872,200
1991-02-28$12.81$17.0854,000
1991-02-27$12.56$16.7531,000
1991-02-26$12.69$16.9216,600
1991-02-25$12.75$17.0019,400
1991-02-22$12.81$17.0827,000
1991-02-21$12.63$16.8392,000
1991-02-20$12.50$16.6723,400
1991-02-19$12.88$17.1730,800
1991-02-15$12.88$17.17108,200
1991-02-14$12.81$17.0853,600
1991-02-13$12.88$17.1760,000
1991-02-12$12.88$17.17122,600
1991-02-11$12.69$16.9258,400
1991-02-08$12.31$16.4230,200
1991-02-07$12.19$16.2552,600
1991-02-06$12.13$16.1765,000
1991-02-05$12.13$16.1785,400
1991-02-04$11.94$15.9279,000
1991-02-01$11.69$15.5890,400
1991-01-31$12.00$16.0023,200
1991-01-30$12.00$16.0027,600
1991-01-29$12.13$16.1717,400
1991-01-28$12.13$16.17213,200
1991-01-25$12.25$16.33239,800
1991-01-24$12.56$16.45271,200
1991-01-23$12.38$16.2126,600
1991-01-22$12.38$16.2123,200
1991-01-21$12.25$16.0458,000
1991-01-18$12.19$15.9625,600
1991-01-17$12.25$16.0434,800
1991-01-16$11.88$15.5531,600
1991-01-15$11.50$15.0622,800
1991-01-14$11.63$15.2210,400
1991-01-11$11.56$15.1490,000
1991-01-10$11.75$15.3913,000
1991-01-09$11.81$15.47123,800
1991-01-08$11.88$15.5523,000
1991-01-07$11.81$15.4764,000
1991-01-04$12.00$15.7118,000
1991-01-03$12.31$16.1211,200
1991-01-02$12.13$15.8818,200