Ameren Illinois Co (AILIN) stock
AILINOTCElectric & Other Services CombinedFiscal year ends December 31Also trades as AILIH, AILIM, AILIO, AILIP, AILLI, AILLM, AILLN, AILLO, AILLP
Last filing: 10-Q on Aug 3, 2026
$70.35+0.00 (0.00%)
Close on Oct 19, 2026Market cap –P/E –Yield –
Price history
Ameren Illinois share prices for every month, newest first. Adjusted for stock splits, not for dividends.
Close, Oct 19, 2026
$70.35
0.00% on the day
52-week range
$70.35 – $74.25
-5.3% from the high
Change over 52 weeks
-2.6%
From $72.25 on Oct 17, 2025
Average volume
29
Shares a day, last 90 sessions
| Month | Open | High | Low | Close | Change | Volume |
|---|---|---|---|---|---|---|
| Oct 2026 | $70.35 | $70.35 | $70.35 | $70.35 | 0.00% | 0 |
| Sep 2026 | $72.00 | $72.00 | $70.35 | $70.35 | -2.29% | 1,100 |
| Aug 2026 | $71.00 | $72.00 | $71.00 | $72.00 | +1.41% | 125 |
| Jul 2026 | $71.00 | $73.50 | $71.00 | $71.00 | 0.00% | 1,400 |
| Jun 2026 | $73.25 | $73.25 | $71.00 | $71.00 | -3.07% | 300 |
| May 2026 | $73.25 | $73.25 | $73.25 | $73.25 | 0.00% | 0 |
| Apr 2026 | $73.25 | $73.25 | $73.25 | $73.25 | 0.00% | 0 |
| Mar 2026 | $73.25 | $73.25 | $73.25 | $73.25 | 0.00% | 0 |
| Feb 2026 | $73.25 | $73.25 | $73.25 | $73.25 | 0.00% | 0 |
| Jan 2026 | $73.25 | $73.25 | $73.25 | $73.25 | 0.00% | 0 |
| Dec 2025 | $72.88 | $74.25 | $72.54 | $73.25 | +0.51% | 692 |
| Nov 2025 | $72.25 | $72.88 | $70.69 | $72.88 | +0.87% | 499 |
| Oct 2025 | $71.00 | $72.25 | $71.00 | $72.25 | +1.76% | 192 |
| Sep 2025 | $71.00 | $71.00 | $71.00 | $71.00 | 0.00% | 0 |
| Aug 2025 | $71.00 | $71.00 | $71.00 | $71.00 | 0.00% | 0 |
| Jul 2025 | $72.00 | $72.00 | $71.00 | $71.00 | -1.39% | 100 |
| Jun 2025 | $72.50 | $72.50 | $70.50 | $72.00 | -0.69% | 826 |
| May 2025 | $72.50 | $72.50 | $72.50 | $72.50 | 0.00% | 0 |
| Apr 2025 | $71.21 | $72.50 | $70.50 | $72.50 | +1.81% | 2,900 |
| Mar 2025 | $71.21 | $71.21 | $71.21 | $71.21 | 0.00% | 0 |
| Feb 2025 | $73.30 | $73.30 | $71.21 | $71.21 | -2.85% | 100 |
| Jan 2025 | $73.00 | $73.30 | $73.00 | $73.30 | +0.41% | 200 |
| Dec 2024 | $73.50 | $73.50 | $73.00 | $73.00 | -0.68% | 300 |
| Nov 2024 | $74.75 | $74.75 | $73.50 | $73.50 | -1.67% | 368 |
| Oct 2024 | $75.00 | $75.00 | $74.75 | $74.75 | -0.33% | 300 |
| Sep 2024 | $73.00 | $75.00 | $73.00 | $75.00 | +2.74% | 200 |
| Aug 2024 | $70.25 | $73.00 | $70.25 | $73.00 | +3.91% | 700 |
| Jul 2024 | $70.05 | $70.25 | $70.05 | $70.25 | +0.29% | 200 |
| Jun 2024 | $70.05 | $70.05 | $70.05 | $70.05 | 0.00% | 400 |
| May 2024 | $71.00 | $71.00 | $70.05 | $70.05 | -1.34% | 100 |
| Apr 2024 | $71.00 | $71.00 | $71.00 | $71.00 | 0.00% | 0 |
| Mar 2024 | $71.00 | $71.00 | $71.00 | $71.00 | 0.00% | 0 |
| Feb 2024 | $71.00 | $71.00 | $71.00 | $71.00 | 0.00% | 0 |
| Jan 2024 | $71.00 | $71.00 | $71.00 | $71.00 | 0.00% | 0 |
| Dec 2023 | $78.00 | $78.00 | $68.25 | $71.00 | -8.97% | 1,100 |
| Nov 2023 | $78.00 | $78.00 | $78.00 | $78.00 | 0.00% | 0 |
| Oct 2023 | $78.00 | $78.00 | $78.00 | $78.00 | 0.00% | 0 |
| Sep 2023 | $78.00 | $78.00 | $78.00 | $78.00 | 0.00% | 0 |
| Aug 2023 | $78.00 | $78.00 | $78.00 | $78.00 | 0.00% | 0 |
| Jul 2023 | $78.00 | $78.00 | $78.00 | $78.00 | 0.00% | 0 |
| Jun 2023 | $78.00 | $78.00 | $78.00 | $78.00 | 0.00% | 0 |
| May 2023 | $78.00 | $78.00 | $78.00 | $78.00 | 0.00% | 100 |
| Apr 2023 | $79.00 | $79.00 | $78.00 | $78.00 | -1.27% | 100 |
| Mar 2023 | $75.00 | $79.00 | $73.00 | $79.00 | +5.33% | 4,600 |
| Feb 2023 | $90.00 | $90.00 | $75.00 | $75.00 | -16.67% | 100 |
| Jan 2023 | $90.00 | $90.00 | $90.00 | $90.00 | 0.00% | 0 |
| Dec 2022 | $75.01 | $90.00 | $74.00 | $90.00 | +19.98% | 900 |
| Nov 2022 | $75.01 | $75.01 | $75.01 | $75.01 | 0.00% | 0 |
| Oct 2022 | $75.01 | $75.01 | $75.01 | $75.01 | 0.00% | 0 |
| Sep 2022 | $75.01 | $75.01 | $75.01 | $75.01 | 0.00% | 0 |
| Aug 2022 | $88.00 | $89.00 | $75.01 | $75.01 | -14.76% | 500 |
| Jul 2022 | $88.00 | $88.00 | $88.00 | $88.00 | 0.00% | 0 |
| Jun 2022 | $88.00 | $88.00 | $88.00 | $88.00 | 0.00% | 0 |
| May 2022 | $88.00 | $88.00 | $88.00 | $88.00 | 0.00% | 0 |
| Apr 2022 | $100.00 | $100.00 | $86.04 | $88.00 | -12.00% | 300 |
| Mar 2022 | $100.00 | $100.00 | $100.00 | $100.00 | 0.00% | 0 |
| Feb 2022 | $100.00 | $100.00 | $100.00 | $100.00 | 0.00% | 0 |
| Jan 2022 | $100.00 | $100.00 | $100.00 | $100.00 | 0.00% | 0 |
| Dec 2021 | $100.00 | $100.00 | $100.00 | $100.00 | 0.00% | 0 |
| Nov 2021 | $98.14 | $100.00 | $98.14 | $100.00 | +1.90% | 400 |
| Oct 2021 | $98.14 | $98.14 | $98.14 | $98.14 | 0.00% | 0 |
| Sep 2021 | $98.14 | $98.14 | $98.14 | $98.14 | 0.00% | 0 |
| Aug 2021 | $101.00 | $101.00 | $98.11 | $98.14 | -2.83% | 200 |
| Jul 2021 | $99.06 | $101.00 | $99.06 | $101.00 | +1.96% | 300 |
| Jun 2021 | $99.06 | $99.06 | $99.06 | $99.06 | 0.00% | 0 |
| May 2021 | $99.06 | $99.06 | $99.06 | $99.06 | 0.00% | 0 |
| Apr 2021 | $102.00 | $102.00 | $99.06 | $99.06 | -2.88% | 100 |
| Mar 2021 | $102.00 | $102.00 | $102.00 | $102.00 | 0.00% | 0 |
| Feb 2021 | $99.18 | $102.00 | $99.18 | $102.00 | +2.84% | 100 |
| Jan 2021 | $99.18 | $99.18 | $98.12 | $99.18 | 0.00% | 0 |
| Dec 2020 | $99.18 | $99.18 | $99.18 | $99.18 | 0.00% | 0 |
| Nov 2020 | $99.18 | $99.18 | $99.18 | $99.18 | 0.00% | 0 |
| Oct 2020 | $99.18 | $99.18 | $99.18 | $99.18 | 0.00% | 0 |
| Sep 2020 | $100.00 | $100.00 | $99.18 | $99.18 | -0.82% | 200 |
| Aug 2020 | $100.00 | $100.00 | $100.00 | $100.00 | 0.00% | 0 |
| Jul 2020 | $100.00 | $100.00 | $100.00 | $100.00 | 0.00% | 0 |
| Jun 2020 | $100.00 | $100.00 | $100.00 | $100.00 | 0.00% | 100 |
| May 2020 | $100.00 | $100.00 | $100.00 | $100.00 | 0.00% | 0 |
| Apr 2020 | $98.80 | $100.00 | $98.80 | $100.00 | 0.00% | 200 |
| Mar 2020 | $100.00 | $100.00 | $100.00 | $100.00 | 0.00% | 0 |
| Feb 2020 | $100.00 | $100.00 | $100.00 | $100.00 | 0.00% | 0 |
| Jan 2020 | $100.00 | $100.00 | $100.00 | $100.00 | 0.00% | 0 |
| Dec 2019 | $100.00 | $100.00 | $100.00 | $100.00 | 0.00% | 100 |
| Nov 2019 | $100.00 | $100.00 | $100.00 | $100.00 | 0.00% | 0 |
| Oct 2019 | $100.00 | $100.00 | $100.00 | $100.00 | 0.00% | 0 |
| Sep 2019 | $100.00 | $100.00 | $100.00 | $100.00 | 0.00% | 100 |
| Aug 2019 | $99.00 | $100.00 | $98.01 | $100.00 | +1.01% | 1,400 |
| Jul 2019 | $96.00 | $99.00 | $92.02 | $99.00 | +3.13% | 2,500 |
| Jun 2019 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| May 2019 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 100 |
| Apr 2019 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 100 |
| Mar 2019 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| Feb 2019 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| Jan 2019 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| Dec 2018 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 300 |
| Nov 2018 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 100 |
| Oct 2018 | $98.00 | $98.00 | $95.00 | $96.00 | -2.04% | 200 |
| Sep 2018 | $99.00 | $99.00 | $94.00 | $98.00 | -1.01% | 300 |
| Aug 2018 | $99.00 | $99.00 | $99.00 | $99.00 | 0.00% | 0 |
| Jul 2018 | $97.00 | $99.00 | $97.00 | $99.00 | +2.06% | 800 |
| Jun 2018 | $97.00 | $97.00 | $97.00 | $97.00 | 0.00% | 0 |
| May 2018 | $97.00 | $97.00 | $97.00 | $97.00 | 0.00% | 0 |
| Apr 2018 | $97.00 | $97.00 | $97.00 | $97.00 | 0.00% | 0 |
| Mar 2018 | $97.00 | $97.00 | $97.00 | $97.00 | 0.00% | 0 |
| Feb 2018 | $97.00 | $97.00 | $97.00 | $97.00 | 0.00% | 0 |
| Jan 2018 | $96.50 | $97.00 | $92.00 | $97.00 | +0.52% | 200 |
| Dec 2017 | $96.50 | $96.50 | $96.50 | $96.50 | 0.00% | 0 |
| Nov 2017 | $96.50 | $96.50 | $96.50 | $96.50 | 0.00% | 0 |
| Oct 2017 | $99.00 | $99.00 | $95.00 | $96.50 | -2.53% | 500 |
| Sep 2017 | $99.00 | $99.00 | $99.00 | $99.00 | 0.00% | 100 |
| Aug 2017 | $99.00 | $99.00 | $99.00 | $99.00 | 0.00% | 0 |
| Jul 2017 | $97.75 | $99.00 | $97.00 | $99.00 | +1.28% | 400 |
| Jun 2017 | $90.10 | $97.75 | $90.10 | $97.75 | +8.49% | 400 |
| May 2017 | $96.00 | $96.00 | $90.10 | $90.10 | -6.15% | 100 |
| Apr 2017 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| Mar 2017 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| Feb 2017 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| Jan 2017 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| Dec 2016 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| Nov 2016 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| Oct 2016 | $100.00 | $100.00 | $93.00 | $96.00 | -4.00% | 600 |
| Sep 2016 | $99.00 | $100.00 | $98.00 | $100.00 | +1.01% | 1,600 |
| Aug 2016 | $99.00 | $99.00 | $99.00 | $99.00 | 0.00% | 0 |
| Jul 2016 | $99.00 | $99.00 | $99.00 | $99.00 | 0.00% | 0 |
| Jun 2016 | $99.00 | $99.00 | $99.00 | $99.00 | 0.00% | 0 |
| May 2016 | $99.00 | $99.00 | $99.00 | $99.00 | 0.00% | 0 |
| Apr 2016 | $99.00 | $99.00 | $99.00 | $99.00 | 0.00% | 0 |
| Mar 2016 | $99.00 | $99.00 | $99.00 | $99.00 | 0.00% | 0 |
| Feb 2016 | $99.00 | $99.00 | $99.00 | $99.00 | 0.00% | 0 |
| Jan 2016 | $99.00 | $99.00 | $99.00 | $99.00 | 0.00% | 0 |
| Dec 2015 | $99.00 | $99.00 | $99.00 | $99.00 | 0.00% | 0 |
| Nov 2015 | $99.00 | $99.00 | $99.00 | $99.00 | -0.75% | 100 |
| Oct 2015 | $99.75 | $99.75 | $99.75 | $99.75 | 0.00% | 0 |
| Sep 2015 | $99.75 | $99.75 | $99.75 | $99.75 | 0.00% | 0 |
| Aug 2015 | $99.75 | $99.75 | $99.75 | $99.75 | 0.00% | 0 |
| Jul 2015 | $97.50 | $99.75 | $97.50 | $99.75 | +2.31% | 800 |
| Jun 2015 | $97.50 | $97.50 | $97.50 | $97.50 | 0.00% | 0 |
| May 2015 | $97.50 | $97.50 | $97.50 | $97.50 | 0.00% | 0 |
| Apr 2015 | $97.50 | $97.50 | $97.50 | $97.50 | 0.00% | 0 |
| Mar 2015 | $97.50 | $97.50 | $97.50 | $97.50 | 0.00% | 0 |
| Feb 2015 | $94.00 | $97.50 | $94.00 | $97.50 | +3.72% | 600 |
| Jan 2015 | $94.00 | $94.00 | $94.00 | $94.00 | 0.00% | 0 |
| Dec 2014 | $98.75 | $98.75 | $94.00 | $94.00 | -4.81% | 400 |
| Nov 2014 | $98.75 | $98.75 | $98.75 | $98.75 | 0.00% | 0 |
| Oct 2014 | $93.00 | $98.75 | $93.00 | $98.75 | +6.18% | 600 |
| Sep 2014 | $90.01 | $93.00 | $90.01 | $93.00 | +3.32% | 500 |
| Aug 2014 | $91.00 | $91.00 | $90.01 | $90.01 | -1.09% | 100 |
| Jul 2014 | $96.00 | $96.00 | $88.50 | $91.00 | -5.21% | 400 |
| Jun 2014 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| May 2014 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| Apr 2014 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| Mar 2014 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| Feb 2014 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| Jan 2014 | $93.60 | $96.00 | $93.60 | $96.00 | +2.56% | 400 |
| Dec 2013 | $93.60 | $93.60 | $93.60 | $93.60 | 0.00% | 0 |
| Nov 2013 | $96.00 | $96.00 | $93.60 | $93.60 | -2.50% | 100 |
| Oct 2013 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| Sep 2013 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| Aug 2013 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| Jul 2013 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| Jun 2013 | $101.25 | $101.25 | $96.00 | $96.00 | -5.19% | 200 |
| May 2013 | $95.00 | $101.25 | $95.00 | $101.25 | +6.58% | 8,200 |
| Apr 2013 | $100.00 | $100.00 | $95.00 | $95.00 | -5.00% | 300 |
| Mar 2013 | $100.00 | $100.00 | $99.00 | $100.00 | 0.00% | 1,100 |
| Feb 2013 | $100.00 | $100.00 | $100.00 | $100.00 | 0.00% | 0 |
| Jan 2013 | $100.00 | $100.00 | $99.35 | $100.00 | 0.00% | 4,200 |
| Dec 2012 | $88.05 | $100.00 | $88.05 | $100.00 | +13.57% | 2,500 |
| Nov 2012 | $88.05 | $88.05 | $88.05 | $88.05 | 0.00% | 0 |
| Oct 2012 | $99.25 | $99.25 | $88.05 | $88.05 | – | 300 |
Seasonality
AILIN return in each calendar month over the last 10 years, including dividends. The current month runs to the latest close.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average | 1.4% | -1.7% | 0.5% | -0.2% | -0.7% | 0.5% | 2.1% | -1.1% | -0.1% | 1.0% | 0.1% | 1.2% |
| Months up | 10 of 10 | 1 of 10 | 1 of 10 | 8 of 10 | 0 of 10 | 1 of 10 | 10 of 10 | 3 of 10 | 1 of 10 | 8 of 10 | 2 of 9 | 2 of 9 |
| 2026 | 1.5% | 0.0% | 0.0% | 1.5% | 0.0% | -3.1% | 1.6% | 1.4% | -2.3% | 1.6% | ||
| 2025 | 2.0% | -2.9% | 0.0% | 3.4% | 0.0% | -0.7% | 0.1% | 0.0% | 0.0% | 3.3% | 0.9% | 0.5% |
| 2024 | 1.6% | 0.0% | 0.0% | 1.6% | -1.3% | 0.0% | 1.9% | 3.9% | 2.7% | 1.2% | -1.7% | -0.7% |
| 2023 | 1.2% | -16.7% | 5.3% | 0.1% | 0.0% | 0.0% | 1.4% | 0.0% | 0.0% | 1.4% | 0.0% | -9.0% |
| 2022 | 1.1% | 0.0% | 0.0% | -11.0% | 0.0% | 0.0% | 1.3% | -14.8% | 0.0% | 1.5% | 0.0% | 20.0% |
| 2021 | 1.1% | 2.8% | 0.0% | -1.8% | 0.0% | 0.0% | 3.1% | -2.8% | 0.0% | 1.1% | 1.9% | 0.0% |
| 2020 | 1.1% | 0.0% | 0.0% | 1.1% | 0.0% | 0.0% | 1.1% | 0.0% | -0.8% | 1.1% | 0.0% | 0.0% |
| 2019 | 1.2% | 0.0% | 0.0% | 1.2% | 0.0% | 0.0% | 4.3% | 1.0% | 0.0% | 1.1% | 0.0% | 0.0% |
| 2018 | 1.7% | 0.0% | 0.0% | 1.2% | 0.0% | 0.0% | 3.2% | 0.0% | -1.0% | -0.9% | 0.0% | 0.0% |
| 2017 | 1.2% | 0.0% | 0.0% | 1.2% | -6.1% | 8.5% | 2.4% | 0.0% | 0.0% | -1.4% | 0.0% | 0.0% |