OTC:AILLN | Historical Stock Price | Ameren Illinois Co

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
2009-02-09 to 2026-08-28
Data captured

Stock Price Chart

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

$67.45$88.75$116.77$153.64$202.16$266.002009-02-092026-08-28

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

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Historical Stock Price — 2025

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volume
2025-12-31$78.85$192.930
2025-12-30$78.85$192.930
2025-12-29$78.85$192.930
2025-12-26$78.85$192.930
2025-12-24$78.85$192.930
2025-12-23$78.85$192.930
2025-12-22$78.85$192.93132
2025-12-19$81.21$198.710
2025-12-18$81.21$198.710
2025-12-17$81.21$198.710
2025-12-16$81.21$198.710
2025-12-15$81.21$198.710
2025-12-12$81.21$198.710
2025-12-11$81.21$198.710
2025-12-10$81.21$198.710
2025-12-09$81.21$198.710
2025-12-08$81.21$198.710
2025-12-05$81.21$198.710
2025-12-04$81.21$198.710
2025-12-03$81.21$198.710
2025-12-02$81.21$198.71160
2025-12-01$79.25$193.91100
2025-11-28$79.00$193.300
2025-11-26$79.00$193.300
2025-11-25$79.00$193.300
2025-11-24$79.00$193.300
2025-11-21$79.00$193.300
2025-11-20$79.00$193.300
2025-11-19$79.00$193.300
2025-11-18$79.00$193.30100
2025-11-17$81.00$198.200
2025-11-14$81.00$198.20200
2025-11-13$80.99$198.170
2025-11-12$80.99$198.170
2025-11-11$80.99$198.170
2025-11-10$80.99$198.170
2025-11-07$80.99$198.170
2025-11-06$80.99$198.17200
2025-11-05$79.00$193.300
2025-11-04$79.00$193.300
2025-11-03$79.00$193.300
2025-10-31$79.00$193.300
2025-10-30$79.00$193.300
2025-10-29$79.00$193.300
2025-10-28$79.00$193.30300
2025-10-27$78.55$192.200
2025-10-24$78.55$192.20100
2025-10-23$79.25$193.910
2025-10-22$79.25$193.910
2025-10-21$79.25$193.91163
2025-10-20$78.77$192.740
2025-10-17$78.77$192.740
2025-10-16$78.77$192.740
2025-10-15$78.77$192.740
2025-10-14$78.77$192.74469
2025-10-13$81.50$199.420
2025-10-10$81.50$199.42220
2025-10-09$81.00$195.200
2025-10-08$81.00$195.201,161
2025-10-07$78.87$190.070
2025-10-06$78.87$190.070
2025-10-03$78.87$190.070
2025-10-02$78.87$190.070
2025-10-01$78.87$190.070
2025-09-30$78.87$190.070
2025-09-29$78.87$190.07208
2025-09-26$81.00$195.200
2025-09-25$81.00$195.200
2025-09-24$81.00$195.20189
2025-09-23$81.75$197.010
2025-09-22$81.75$197.01200
2025-09-19$79.50$191.580
2025-09-18$79.50$191.58564
2025-09-17$79.49$191.56110
2025-09-16$79.45$191.46137
2025-09-15$79.49$191.56285
2025-09-12$79.14$190.720
2025-09-11$79.14$190.72100
2025-09-10$77.00$185.560
2025-09-09$77.00$185.560
2025-09-08$77.00$185.560
2025-09-05$77.00$185.561,050
2025-09-04$78.93$190.210
2025-09-03$78.93$190.210
2025-09-02$78.93$190.210
2025-08-29$78.93$190.210
2025-08-28$78.93$190.210
2025-08-27$78.93$190.210
2025-08-26$78.93$190.210
2025-08-25$78.93$190.21150
2025-08-22$77.22$186.090
2025-08-21$77.22$186.09400
2025-08-20$77.50$186.76510
2025-08-19$78.04$188.07365
2025-08-18$78.47$189.10102
2025-08-15$78.30$188.690
2025-08-14$78.30$188.690
2025-08-13$78.30$188.690
2025-08-12$78.30$188.690
2025-08-11$78.30$188.690
2025-08-08$78.30$188.690
2025-08-07$78.30$188.690
2025-08-06$78.30$188.690
2025-08-05$78.30$188.690
2025-08-04$78.30$188.690
2025-08-01$78.30$188.690
2025-07-31$78.30$188.690
2025-07-30$78.30$188.690
2025-07-29$78.30$188.69320
2025-07-28$77.75$187.37109
2025-07-25$77.90$187.730
2025-07-24$77.90$187.730
2025-07-23$77.90$187.730
2025-07-22$77.90$187.73100
2025-07-21$77.78$187.440
2025-07-18$77.78$187.440
2025-07-17$77.78$187.440
2025-07-16$77.78$187.440
2025-07-15$77.78$187.44240
2025-07-14$77.25$186.160
2025-07-11$77.25$186.160
2025-07-10$77.25$183.210
2025-07-09$77.25$183.210
2025-07-08$77.25$183.210
2025-07-07$77.25$183.21100
2025-07-03$77.25$183.21160
2025-07-02$78.00$184.99114
2025-07-01$76.55$181.550
2025-06-30$76.55$181.55300
2025-06-27$76.60$181.670
2025-06-26$76.60$181.670
2025-06-25$76.60$181.670
2025-06-24$76.60$181.670
2025-06-23$76.60$181.670
2025-06-20$76.60$181.67101
2025-06-18$76.72$181.95174
2025-06-17$76.79$182.120
2025-06-16$76.79$182.120
2025-06-13$76.79$182.120
2025-06-12$76.79$182.120
2025-06-11$76.79$182.12505
2025-06-10$77.00$182.62225
2025-06-09$77.00$182.620
2025-06-06$77.00$182.62235
2025-06-05$77.00$182.620
2025-06-04$77.00$182.62472
2025-06-03$76.70$181.900
2025-06-02$76.70$181.900
2025-05-30$76.70$181.900
2025-05-29$76.70$181.900
2025-05-28$76.70$181.90100
2025-05-27$76.50$181.43100
2025-05-23$76.75$182.020
2025-05-22$76.75$182.02238
2025-05-21$78.00$184.990
2025-05-20$78.00$184.99625
2025-05-19$78.00$184.991,448
2025-05-16$78.00$184.990
2025-05-15$78.00$184.990
2025-05-14$78.00$184.991,000
2025-05-13$78.01$185.010
2025-05-12$78.01$185.010
2025-05-09$78.01$185.01375
2025-05-08$74.00$175.500
2025-05-07$74.00$175.500
2025-05-06$74.00$175.501,143
2025-05-05$78.00$184.990
2025-05-02$78.00$184.990
2025-05-01$78.00$184.990
2025-04-30$78.00$184.99457
2025-04-29$77.65$184.161,003
2025-04-28$79.50$188.550
2025-04-25$79.50$188.550
2025-04-24$79.50$188.550
2025-04-23$79.50$188.550
2025-04-22$79.50$188.55350
2025-04-21$78.00$184.990
2025-04-17$78.00$184.99500
2025-04-16$78.25$185.580
2025-04-15$78.25$185.58230
2025-04-14$78.25$185.58165
2025-04-11$78.00$184.99640
2025-04-10$79.30$185.170
2025-04-09$79.30$185.17448
2025-04-08$79.78$186.29680
2025-04-07$79.13$184.761,395
2025-04-04$80.05$186.920
2025-04-03$80.05$186.920
2025-04-02$80.05$186.920
2025-04-01$80.05$186.920
2025-03-31$80.05$186.92376
2025-03-28$79.00$184.470
2025-03-27$79.00$184.470
2025-03-26$79.00$184.471,954
2025-03-25$79.10$184.70524
2025-03-24$80.00$186.800
2025-03-21$80.00$186.800
2025-03-20$80.00$186.800
2025-03-19$80.00$186.80100
2025-03-18$79.55$185.750
2025-03-17$79.55$185.75207
2025-03-14$79.00$184.470
2025-03-13$79.00$184.470
2025-03-12$79.00$184.470
2025-03-11$79.00$184.473,276
2025-03-10$80.26$187.410
2025-03-07$80.26$187.410
2025-03-06$80.26$187.410
2025-03-05$80.26$187.410
2025-03-04$80.26$187.410
2025-03-03$80.26$187.410
2025-02-28$80.26$187.410
2025-02-27$80.26$187.410
2025-02-26$80.26$187.410
2025-02-25$80.26$187.410
2025-02-24$80.26$187.410
2025-02-21$80.26$187.410
2025-02-20$80.26$187.410
2025-02-19$80.26$187.410
2025-02-18$80.26$187.410
2025-02-14$80.26$187.410
2025-02-13$80.26$187.410
2025-02-12$80.26$187.410
2025-02-11$80.26$187.41595
2025-02-10$80.00$186.80340
2025-02-07$80.26$187.41130
2025-02-06$80.51$187.99495
2025-02-05$80.45$187.85117
2025-02-04$79.52$185.680
2025-02-03$79.52$185.680
2025-01-31$79.52$185.68266
2025-01-30$79.32$185.210
2025-01-29$79.32$185.21100
2025-01-28$79.50$185.630
2025-01-27$79.50$185.630
2025-01-24$79.50$185.630
2025-01-23$79.50$185.63395
2025-01-22$79.05$184.580
2025-01-21$79.05$184.580
2025-01-17$79.05$184.580
2025-01-16$79.05$184.580
2025-01-15$79.05$184.580
2025-01-14$79.05$184.580
2025-01-13$79.05$184.580
2025-01-10$79.05$181.720
2025-01-08$79.05$181.72100
2025-01-07$79.60$182.990
2025-01-06$79.60$182.99170
2025-01-03$79.78$183.39195
2025-01-02$77.00$177.010