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 — 2003

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2003-12-31$12.45$38.59323,600
2003-12-30$12.47$38.65448,000
2003-12-29$12.39$38.39476,400
2003-12-26$12.39$38.39185,800
2003-12-24$12.32$38.17148,200
2003-12-23$12.30$38.13435,000
2003-12-22$12.26$37.99713,000
2003-12-19$12.15$37.64572,200
2003-12-18$12.14$37.61842,800
2003-12-17$12.08$37.43599,800
2003-12-16$12.23$37.91319,400
2003-12-15$12.30$38.13447,600
2003-12-12$12.32$38.17503,000
2003-12-11$12.39$38.40547,000
2003-12-10$12.21$37.85434,000
2003-12-09$12.16$37.68378,000
2003-12-08$12.40$38.42387,400
2003-12-05$12.29$38.09265,200
2003-12-04$12.36$38.30308,000
2003-12-03$12.38$38.36409,800
2003-12-02$12.45$38.57578,000
2003-12-01$12.34$38.23433,000
2003-11-28$12.23$37.89127,800
2003-11-26$12.22$37.88262,800
2003-11-25$12.16$37.68338,200
2003-11-24$12.00$37.20298,000
2003-11-21$11.73$36.36234,000
2003-11-20$11.74$36.39270,000
2003-11-19$11.87$36.78539,600
2003-11-18$11.85$36.73637,200
2003-11-17$12.12$37.55560,200
2003-11-14$12.12$37.55757,200
2003-11-13$12.29$38.09235,200
2003-11-12$12.33$38.22420,600
2003-11-11$12.23$37.89355,400
2003-11-10$12.10$37.51669,600
2003-11-07$12.28$38.05484,200
2003-11-06$12.27$38.02843,400
2003-11-05$12.30$38.13897,800
2003-11-04$12.29$38.09758,200
2003-11-03$12.31$38.16673,600
2003-10-31$12.03$37.29404,600
2003-10-30$11.88$36.811,538,400
2003-10-29$11.69$36.232,176,600
2003-10-28$11.70$35.86930,200
2003-10-27$11.64$35.69623,600
2003-10-24$11.57$35.46800,600
2003-10-23$11.54$35.371,252,000
2003-10-22$11.50$35.26383,200
2003-10-21$11.54$35.37774,000
2003-10-20$11.57$35.48774,000
2003-10-17$11.45$35.11698,200
2003-10-16$11.53$35.34715,200
2003-10-15$11.52$35.33998,000
2003-10-14$11.55$35.421,818,200
2003-10-13$11.55$35.40400,000
2003-10-10$11.55$35.40956,200
2003-10-09$11.54$35.39706,200
2003-10-08$11.43$35.05372,600
2003-10-07$11.39$34.91570,400
2003-10-06$11.40$34.96401,200
2003-10-03$11.41$34.99409,600
2003-10-02$11.25$34.48372,200
2003-10-01$11.13$34.11559,000
2003-09-30$11.00$33.73491,000
2003-09-29$11.15$34.181,506,200
2003-09-26$11.15$34.18360,400
2003-09-25$11.09$33.99386,800
2003-09-24$11.09$33.99262,000
2003-09-23$11.15$34.19348,800
2003-09-22$11.26$34.51494,600
2003-09-19$11.35$34.79592,600
2003-09-18$11.26$34.53627,400
2003-09-17$11.07$33.93782,000
2003-09-16$11.04$33.85673,400
2003-09-15$11.06$33.90489,600
2003-09-12$10.97$33.64340,000
2003-09-11$10.99$33.70282,200
2003-09-10$10.95$33.56489,600
2003-09-09$10.86$33.29548,200
2003-09-08$10.88$33.35484,600
2003-09-05$10.67$32.72426,800
2003-09-04$10.75$32.95446,800
2003-09-03$10.67$32.70364,400
2003-09-02$10.57$32.40383,600
2003-08-29$10.47$32.09463,000
2003-08-28$10.34$31.71866,000
2003-08-27$10.43$31.97507,200
2003-08-26$10.34$31.69486,200
2003-08-25$10.36$31.77373,800
2003-08-22$10.35$31.74284,000
2003-08-21$10.56$32.38439,800
2003-08-20$10.46$32.08470,000
2003-08-19$10.29$31.54707,600
2003-08-18$10.34$31.69433,400
2003-08-15$10.34$31.69222,600
2003-08-14$10.25$31.43412,400
2003-08-13$10.21$31.31568,800
2003-08-12$10.32$31.63577,800
2003-08-11$10.20$31.26633,600
2003-08-08$10.20$31.28454,400
2003-08-07$10.29$31.551,021,800
2003-08-06$10.23$31.351,213,800
2003-08-05$10.04$30.791,358,200
2003-08-04$10.28$31.521,194,800
2003-08-01$10.25$31.42743,200
2003-07-31$10.16$31.141,290,000
2003-07-30$10.14$31.082,665,600
2003-07-29$9.93$30.431,016,800
2003-07-28$9.91$30.014,592,400
2003-07-25$9.80$29.671,020,600
2003-07-24$9.84$29.781,000,600
2003-07-23$9.87$29.87653,000
2003-07-22$9.95$30.13883,400
2003-07-21$9.83$29.75586,200
2003-07-18$10.00$30.26571,000
2003-07-17$9.94$30.08840,400
2003-07-16$9.90$29.981,118,000
2003-07-15$10.01$30.291,380,200
2003-07-14$10.01$30.29842,400
2003-07-11$10.05$30.431,319,200
2003-07-10$10.05$30.431,202,400
2003-07-09$10.07$30.471,196,000
2003-07-08$10.01$30.291,986,800
2003-07-07$10.03$30.352,024,800
2003-07-03$10.03$30.351,462,000
2003-07-02$10.13$30.6612,726,400
2003-07-01$9.71$29.402,472,200
2003-06-30$9.52$28.811,412,600
2003-06-27$9.60$29.07669,600
2003-06-26$9.66$29.251,370,600
2003-06-25$10.01$30.31256,800
2003-06-24$9.98$30.20405,000
2003-06-23$10.00$30.26455,800
2003-06-20$10.05$30.41391,000
2003-06-19$10.00$30.28502,800
2003-06-18$9.95$30.13473,600
2003-06-17$9.91$29.99599,600
2003-06-16$9.98$30.20630,000
2003-06-13$9.88$29.90332,800
2003-06-12$10.04$30.38639,600
2003-06-11$10.03$30.35445,400
2003-06-10$9.99$30.23322,200
2003-06-09$9.96$30.14436,400
2003-06-06$9.98$30.22990,000
2003-06-05$10.15$30.73398,000
2003-06-04$10.30$31.19546,600
2003-06-03$10.14$30.69524,000
2003-06-02$10.13$30.66457,400
2003-05-30$9.99$30.25779,000
2003-05-29$9.84$29.78949,400
2003-05-28$10.00$30.26763,200
2003-05-27$10.22$30.94990,600
2003-05-23$10.04$30.40831,200
2003-05-22$9.55$28.92624,200
2003-05-21$9.36$28.34477,600
2003-05-20$9.36$28.34502,600
2003-05-19$9.33$28.23449,400
2003-05-16$9.46$28.64833,600
2003-05-15$9.16$27.73601,400
2003-05-14$8.99$27.20396,000
2003-05-13$8.94$27.05369,800
2003-05-12$8.92$26.99266,400
2003-05-09$8.88$26.89250,200
2003-05-08$8.80$26.64608,400
2003-05-07$8.88$26.89558,000
2003-05-06$8.91$26.96645,200
2003-05-05$8.81$26.67851,600
2003-05-02$8.73$26.42447,600
2003-05-01$8.63$26.13494,400
2003-04-30$8.78$26.58527,000
2003-04-29$8.75$26.49744,600
2003-04-28$8.79$26.61978,800
2003-04-25$8.65$25.814,527,400
2003-04-24$8.62$25.72258,800
2003-04-23$8.60$25.66287,400
2003-04-22$8.57$25.56322,200
2003-04-21$8.47$25.27335,000
2003-04-17$8.51$25.38289,200
2003-04-16$8.46$25.25256,200
2003-04-15$8.42$25.13229,000
2003-04-14$8.41$25.10383,200
2003-04-11$8.33$24.84253,200
2003-04-10$8.39$25.02218,000
2003-04-09$8.45$25.20649,200
2003-04-08$8.27$24.68406,600
2003-04-07$8.18$24.39534,000
2003-04-04$8.15$24.31237,800
2003-04-03$8.09$24.14350,200
2003-04-02$8.17$24.38556,400
2003-04-01$8.20$24.47586,200
2003-03-31$8.04$23.98531,800
2003-03-28$7.98$23.81426,600
2003-03-27$7.89$23.53293,800
2003-03-26$7.86$23.44348,000
2003-03-25$8.01$23.89429,600
2003-03-24$7.92$23.63630,000
2003-03-21$8.07$24.08970,400
2003-03-20$7.95$23.72516,200
2003-03-19$7.85$23.42434,800
2003-03-18$7.86$23.45669,200
2003-03-17$7.78$23.20557,400
2003-03-14$7.66$22.84710,200
2003-03-13$7.59$22.65493,600
2003-03-12$7.60$22.68483,600
2003-03-11$7.63$22.77647,000
2003-03-10$7.75$23.11406,600
2003-03-07$7.83$23.35399,200
2003-03-06$7.81$23.29411,600
2003-03-05$7.87$23.47377,600
2003-03-04$7.90$23.57327,600
2003-03-03$7.97$23.77410,600
2003-02-28$7.88$23.51496,000
2003-02-27$7.85$23.42573,800
2003-02-26$7.85$23.42537,800
2003-02-25$8.04$23.99646,400
2003-02-24$7.94$23.69562,800
2003-02-21$8.04$23.98589,800
2003-02-20$7.94$23.68294,000
2003-02-19$7.87$23.48515,600
2003-02-18$7.90$23.57526,600
2003-02-14$7.76$23.14604,200
2003-02-13$7.70$22.98814,000
2003-02-12$7.56$22.56740,400
2003-02-11$7.85$23.42822,200
2003-02-10$8.03$23.96407,800
2003-02-07$7.95$23.72482,000
2003-02-06$8.01$23.90617,400
2003-02-05$8.10$24.17613,600
2003-02-04$8.12$24.23619,600
2003-02-03$8.18$24.41388,800
2003-01-31$8.10$24.16430,800
2003-01-30$8.01$23.89439,400
2003-01-29$8.00$23.87662,200
2003-01-28$8.19$24.054,590,200
2003-01-27$8.13$23.89909,400
2003-01-24$8.33$24.46603,600
2003-01-23$8.32$24.43415,800
2003-01-22$8.22$24.15503,800
2003-01-21$8.28$24.32374,600
2003-01-17$8.41$24.71430,200
2003-01-16$8.54$25.08498,600
2003-01-15$8.58$25.20637,000
2003-01-14$8.63$25.34592,200
2003-01-13$8.66$25.45817,200
2003-01-10$8.70$25.55631,800
2003-01-09$8.85$26.01731,400
2003-01-08$8.73$25.64801,800
2003-01-07$8.71$25.591,262,600
2003-01-06$9.10$26.73946,600
2003-01-03$8.62$25.32640,200
2003-01-02$8.50$24.96641,400