Ameren Illinois Co (AILIP) stock
AILIPOTCElectric & Other Services CombinedFiscal year ends December 31Also trades as AILIH, AILIM, AILIN, AILIO, AILLI, AILLM, AILLN, AILLO, AILLP
Last filing: 10-Q on Aug 3, 2026
$66.48+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
$66.48
0.00% on the day
52-week range
$66.48 – $72.00
-7.7% from the high
Change over 52 weeks
-7.0%
From $71.45 on Oct 17, 2025
Average volume
14
Shares a day, last 90 sessions
| Month | Open | High | Low | Close | Change | Volume |
|---|---|---|---|---|---|---|
| Oct 2026 | $66.48 | $66.48 | $66.48 | $66.48 | -0.75% | 101 |
| Sep 2026 | $67.30 | $67.30 | $66.98 | $66.98 | -0.48% | 200 |
| Aug 2026 | $67.25 | $67.30 | $67.25 | $67.30 | +0.07% | 728 |
| Jul 2026 | $69.00 | $69.00 | $67.25 | $67.25 | -2.54% | 100 |
| Jun 2026 | $67.25 | $69.00 | $67.25 | $69.00 | +2.60% | 200 |
| May 2026 | $70.00 | $70.00 | $67.25 | $67.25 | -3.93% | 730 |
| Apr 2026 | $70.00 | $70.00 | $70.00 | $70.00 | 0.00% | 100 |
| Mar 2026 | $67.53 | $71.00 | $67.53 | $70.00 | +3.66% | 1,873 |
| Feb 2026 | $67.53 | $67.53 | $67.53 | $67.53 | 0.00% | 0 |
| Jan 2026 | $66.98 | $67.53 | $66.98 | $67.53 | +0.82% | 280 |
| Dec 2025 | $71.45 | $72.00 | $66.75 | $66.98 | -6.26% | 789 |
| Nov 2025 | $71.45 | $71.45 | $71.45 | $71.45 | 0.00% | 0 |
| Oct 2025 | $72.50 | $72.50 | $71.45 | $71.45 | -1.45% | 387 |
| Sep 2025 | $66.13 | $72.50 | $66.13 | $72.50 | +9.63% | 960 |
| Aug 2025 | $69.00 | $71.50 | $66.13 | $66.13 | -4.16% | 771 |
| Jul 2025 | $67.00 | $72.50 | $67.00 | $69.00 | +2.99% | 1,000 |
| Jun 2025 | $67.00 | $67.00 | $67.00 | $67.00 | 0.00% | 0 |
| May 2025 | $66.13 | $67.00 | $66.00 | $67.00 | +1.32% | 600 |
| Apr 2025 | $70.00 | $70.00 | $66.13 | $66.13 | -5.53% | 541 |
| Mar 2025 | $69.50 | $70.00 | $66.12 | $70.00 | +0.72% | 850 |
| Feb 2025 | $69.00 | $69.64 | $69.00 | $69.50 | +0.72% | 744 |
| Jan 2025 | $68.25 | $69.00 | $68.25 | $69.00 | +1.10% | 300 |
| Dec 2024 | $75.00 | $75.00 | $68.00 | $68.25 | -9.00% | 200 |
| Nov 2024 | $68.55 | $75.00 | $68.55 | $75.00 | +9.41% | 200 |
| Oct 2024 | $74.00 | $74.00 | $68.30 | $68.55 | -7.36% | 1,068 |
| Sep 2024 | $70.00 | $74.00 | $69.00 | $74.00 | +5.71% | 1,000 |
| Aug 2024 | $66.80 | $70.00 | $66.80 | $70.00 | +4.79% | 1,300 |
| Jul 2024 | $67.05 | $68.50 | $66.80 | $66.80 | -0.37% | 1,200 |
| Jun 2024 | $68.99 | $68.99 | $67.05 | $67.05 | -2.81% | 200 |
| May 2024 | $68.00 | $68.99 | $68.00 | $68.99 | +1.46% | 200 |
| Apr 2024 | $69.00 | $69.00 | $67.15 | $68.00 | -1.45% | 800 |
| Mar 2024 | $69.00 | $69.00 | $69.00 | $69.00 | 0.00% | 100 |
| Feb 2024 | $72.00 | $72.00 | $69.00 | $69.00 | -4.17% | 400 |
| Jan 2024 | $72.00 | $72.00 | $72.00 | $72.00 | 0.00% | 0 |
| Dec 2023 | $72.00 | $72.00 | $72.00 | $72.00 | 0.00% | 100 |
| Nov 2023 | $75.75 | $75.75 | $72.00 | $72.00 | -4.95% | 200 |
| Oct 2023 | $75.00 | $75.75 | $75.00 | $75.75 | -3.50% | 300 |
| Sep 2023 | $78.50 | $78.50 | $78.50 | $78.50 | 0.00% | 0 |
| Aug 2023 | $78.50 | $78.50 | $78.50 | $78.50 | 0.00% | 0 |
| Jul 2023 | $78.50 | $78.50 | $78.50 | $78.50 | 0.00% | 0 |
| Jun 2023 | $78.50 | $78.50 | $78.50 | $78.50 | 0.00% | 0 |
| May 2023 | $78.50 | $78.50 | $78.50 | $78.50 | 0.00% | 0 |
| Apr 2023 | $79.50 | $79.50 | $76.95 | $78.50 | -1.26% | 700 |
| Mar 2023 | $81.00 | $81.00 | $78.00 | $79.50 | -1.85% | 700 |
| Feb 2023 | $81.00 | $81.00 | $81.00 | $81.00 | 0.00% | 0 |
| Jan 2023 | $81.00 | $81.00 | $81.00 | $81.00 | 0.00% | 0 |
| Dec 2022 | $81.00 | $81.00 | $81.00 | $81.00 | 0.00% | 0 |
| Nov 2022 | $82.00 | $82.00 | $81.00 | $81.00 | -1.22% | 200 |
| Oct 2022 | $83.50 | $83.50 | $82.00 | $82.00 | -1.80% | 100 |
| Sep 2022 | $83.50 | $83.50 | $83.50 | $83.50 | 0.00% | 0 |
| Aug 2022 | $83.50 | $83.50 | $83.50 | $83.50 | 0.00% | 0 |
| Jul 2022 | $82.00 | $83.50 | $81.00 | $83.50 | +1.83% | 400 |
| Jun 2022 | $87.01 | $87.01 | $81.00 | $82.00 | -5.76% | 2,100 |
| May 2022 | $95.00 | $96.40 | $87.01 | $87.01 | -8.41% | 100 |
| Apr 2022 | $95.00 | $95.00 | $93.91 | $95.00 | 0.00% | 0 |
| Mar 2022 | $96.40 | $96.40 | $94.00 | $95.00 | -1.45% | 600 |
| Feb 2022 | $99.75 | $99.75 | $95.25 | $96.40 | -3.36% | 4,000 |
| Jan 2022 | $99.75 | $99.75 | $99.75 | $99.75 | 0.00% | 0 |
| Dec 2021 | $96.10 | $99.75 | $95.60 | $99.75 | +3.80% | 2,000 |
| Nov 2021 | $96.01 | $96.14 | $96.01 | $96.10 | +0.09% | 500 |
| Oct 2021 | $96.00 | $98.00 | $96.00 | $96.01 | +0.01% | 400 |
| Sep 2021 | $95.20 | $96.00 | $95.20 | $96.00 | +0.84% | 100 |
| Aug 2021 | $98.21 | $99.00 | $95.20 | $95.20 | -3.06% | 300 |
| Jul 2021 | $98.21 | $98.21 | $98.21 | $98.21 | 0.00% | 0 |
| Jun 2021 | $98.21 | $98.21 | $98.21 | $98.21 | 0.00% | 0 |
| May 2021 | $98.21 | $98.21 | $98.21 | $98.21 | 0.00% | 0 |
| Apr 2021 | $102.00 | $102.00 | $98.21 | $98.21 | -3.72% | 200 |
| Mar 2021 | $102.00 | $102.00 | $102.00 | $102.00 | 0.00% | 0 |
| Feb 2021 | $102.00 | $102.00 | $102.00 | $102.00 | 0.00% | 0 |
| Jan 2021 | $102.00 | $102.00 | $102.00 | $102.00 | 0.00% | 500 |
| Dec 2020 | $101.00 | $104.30 | $101.00 | $102.00 | +0.99% | 2,100 |
| Nov 2020 | $101.00 | $101.00 | $99.75 | $101.00 | 0.00% | 3,800 |
| Oct 2020 | $94.80 | $101.00 | $94.80 | $101.00 | +6.54% | 600 |
| Sep 2020 | $94.80 | $94.80 | $94.80 | $94.80 | 0.00% | 0 |
| Aug 2020 | $94.80 | $94.80 | $94.80 | $94.80 | 0.00% | 0 |
| Jul 2020 | $94.45 | $94.80 | $94.25 | $94.80 | +0.37% | 500 |
| Jun 2020 | $94.45 | $94.45 | $94.45 | $94.45 | 0.00% | 0 |
| May 2020 | $95.40 | $97.00 | $94.00 | $94.45 | -2.63% | 1,200 |
| Apr 2020 | $95.25 | $97.00 | $95.25 | $97.00 | +1.84% | 400 |
| Mar 2020 | $97.00 | $97.00 | $93.25 | $95.25 | -1.80% | 1,100 |
| Feb 2020 | $95.25 | $97.50 | $95.00 | $97.00 | +1.84% | 400 |
| Jan 2020 | $95.25 | $95.25 | $95.25 | $95.25 | 0.00% | 0 |
| Dec 2019 | $95.25 | $95.25 | $95.25 | $95.25 | 0.00% | 0 |
| Nov 2019 | $95.25 | $95.25 | $95.25 | $95.25 | 0.00% | 0 |
| Oct 2019 | $95.25 | $95.25 | $95.25 | $95.25 | 0.00% | 0 |
| Sep 2019 | $96.00 | $96.00 | $95.00 | $95.25 | -0.78% | 500 |
| Aug 2019 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| Jul 2019 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| Jun 2019 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| May 2019 | $95.25 | $96.00 | $94.00 | $96.00 | +0.79% | 300 |
| Apr 2019 | $95.25 | $95.25 | $95.25 | $95.25 | 0.00% | 0 |
| Mar 2019 | $95.30 | $95.30 | $95.25 | $95.25 | -0.05% | 200 |
| Feb 2019 | $98.00 | $98.00 | $95.30 | $95.30 | -2.76% | 100 |
| Jan 2019 | $97.00 | $98.00 | $97.00 | $98.00 | +2.08% | 600 |
| Dec 2018 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| Nov 2018 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 0 |
| Oct 2018 | $96.00 | $96.00 | $96.00 | $96.00 | 0.00% | 100 |
| Sep 2018 | $97.00 | $97.00 | $95.00 | $96.00 | -1.03% | 200 |
| Aug 2018 | $97.00 | $97.00 | $97.00 | $97.00 | 0.00% | 0 |
| Jul 2018 | $97.00 | $97.00 | $97.00 | $97.00 | 0.00% | 0 |
| Jun 2018 | $95.00 | $97.00 | $95.00 | $97.00 | +2.11% | 400 |
| May 2018 | $95.00 | $95.00 | $95.00 | $95.00 | 0.00% | 0 |
| Apr 2018 | $93.00 | $95.50 | $93.00 | $95.00 | +2.15% | 400 |
| Mar 2018 | $93.00 | $93.00 | $93.00 | $93.00 | 0.00% | 0 |
| Feb 2018 | $93.00 | $93.00 | $93.00 | $93.00 | 0.00% | 200 |
| Jan 2018 | $98.00 | $98.00 | $93.00 | $93.00 | -5.10% | 1,400 |
| Dec 2017 | $98.00 | $98.00 | $98.00 | $98.00 | 0.00% | 0 |
| Nov 2017 | $92.00 | $98.00 | $92.00 | $98.00 | +6.52% | 500 |
| Oct 2017 | $91.20 | $92.00 | $91.20 | $92.00 | +0.88% | 200 |
| Sep 2017 | $91.20 | $91.20 | $91.20 | $91.20 | 0.00% | 0 |
| Aug 2017 | $97.00 | $97.00 | $91.20 | $91.20 | -5.98% | 100 |
| Jul 2017 | $93.00 | $98.00 | $92.20 | $97.00 | +4.30% | 500 |
| Jun 2017 | $93.00 | $93.00 | $93.00 | $93.00 | 0.00% | 0 |
| May 2017 | $92.50 | $93.00 | $90.00 | $93.00 | +0.54% | 700 |
| Apr 2017 | $91.20 | $92.50 | $90.00 | $92.50 | +1.43% | 500 |
| Mar 2017 | $96.05 | $96.05 | $91.20 | $91.20 | -5.05% | 100 |
| Feb 2017 | $96.05 | $96.05 | $96.05 | $96.05 | 0.00% | 0 |
| Jan 2017 | $96.05 | $96.05 | $96.05 | $96.05 | 0.00% | 0 |
| Dec 2016 | $96.50 | $96.50 | $93.50 | $96.05 | -0.47% | 500 |
| Nov 2016 | $96.25 | $96.50 | $94.50 | $96.50 | +0.26% | 900 |
| Oct 2016 | $98.00 | $98.00 | $94.50 | $96.25 | -1.79% | 900 |
| Sep 2016 | $98.00 | $98.00 | $98.00 | $98.00 | 0.00% | 0 |
| Aug 2016 | $95.50 | $98.00 | $95.50 | $98.00 | +2.62% | 400 |
| Jul 2016 | $95.50 | $95.50 | $95.50 | $95.50 | 0.00% | 0 |
| Jun 2016 | $94.80 | $95.50 | $94.50 | $95.50 | +0.74% | 300 |
| May 2016 | $96.50 | $97.00 | $94.00 | $94.80 | -1.76% | 1,200 |
| Apr 2016 | $99.00 | $99.00 | $94.00 | $96.50 | -2.53% | 700 |
| Mar 2016 | $93.00 | $99.00 | $93.00 | $99.00 | +6.45% | 2,900 |
| Feb 2016 | $93.00 | $93.00 | $93.00 | $93.00 | 0.00% | 0 |
| Jan 2016 | $97.00 | $97.00 | $93.00 | $93.00 | -4.12% | 300 |
| Dec 2015 | $97.25 | $98.00 | $97.00 | $97.00 | -0.26% | 900 |
| Nov 2015 | $97.25 | $97.25 | $97.25 | $97.25 | 0.00% | 0 |
| Oct 2015 | $95.50 | $97.25 | $93.00 | $97.25 | +1.83% | 4,500 |
| Sep 2015 | $92.75 | $96.00 | $92.75 | $95.50 | +2.96% | 1,800 |
| Aug 2015 | $98.00 | $98.00 | $92.75 | $92.75 | -5.36% | 100 |
| Jul 2015 | $98.00 | $98.00 | $98.00 | $98.00 | 0.00% | 0 |
| Jun 2015 | $98.13 | $98.88 | $95.15 | $98.00 | +1.03% | 7,900 |
| May 2015 | $97.00 | $97.00 | $95.13 | $97.00 | 0.00% | 600 |
| Apr 2015 | $97.00 | $97.00 | $97.00 | $97.00 | 0.00% | 0 |
| Mar 2015 | $96.00 | $97.00 | $96.00 | $97.00 | +1.04% | 600 |
| Feb 2015 | $98.75 | $98.75 | $94.00 | $96.00 | -2.78% | 4,000 |
| Jan 2015 | $96.00 | $98.75 | $96.00 | $98.75 | +2.86% | 1,000 |
| Dec 2014 | $91.00 | $96.00 | $91.00 | $96.00 | +5.49% | 2,100 |
| Nov 2014 | $91.00 | $91.00 | $91.00 | $91.00 | 0.00% | 0 |
| Oct 2014 | $98.00 | $98.00 | $91.00 | $91.00 | -7.14% | 300 |
| Sep 2014 | $87.00 | $98.00 | $87.00 | $98.00 | +12.64% | 3,800 |
| Aug 2014 | $87.00 | $87.00 | $87.00 | $87.00 | 0.00% | 0 |
| Jul 2014 | $92.50 | $92.50 | $86.00 | $87.00 | -5.95% | 300 |
| Jun 2014 | $89.75 | $92.50 | $89.75 | $92.50 | +3.06% | 900 |
| May 2014 | $88.00 | $89.75 | $88.00 | $89.75 | +1.99% | 400 |
| Apr 2014 | $88.00 | $88.00 | $88.00 | $88.00 | 0.00% | 0 |
| Mar 2014 | $88.00 | $88.00 | $88.00 | $88.00 | 0.00% | 0 |
| Feb 2014 | $87.00 | $90.00 | $87.00 | $88.00 | +1.15% | 900 |
| Jan 2014 | $88.75 | $88.75 | $85.00 | $87.00 | -1.97% | 500 |
| Dec 2013 | $88.00 | $88.75 | $87.55 | $88.75 | +0.85% | 1,400 |
| Nov 2013 | $96.00 | $96.00 | $88.00 | $88.00 | -8.33% | 700 |
| 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 | $96.00 | $96.00 | $96.00 | $96.00 | +1.05% | 300 |
| May 2013 | $98.50 | $98.50 | $90.25 | $95.00 | -3.55% | 7,200 |
| Apr 2013 | $96.50 | $98.50 | $96.50 | $98.50 | +2.07% | 3,200 |
| Mar 2013 | $96.50 | $96.50 | $96.50 | $96.50 | 0.00% | 0 |
| Feb 2013 | $96.25 | $96.50 | $95.50 | $96.50 | +0.26% | 6,800 |
| Jan 2013 | $94.00 | $96.25 | $94.00 | $96.25 | +2.39% | 3,200 |
| Dec 2012 | $94.00 | $94.00 | $94.00 | $94.00 | 0.00% | 0 |
| Nov 2012 | $95.50 | $95.50 | $93.00 | $94.00 | -1.57% | 300 |
| Oct 2012 | $96.00 | $96.00 | $95.50 | $95.50 | +0.53% | 500 |
| Sep 2012 | $95.00 | $95.00 | $95.00 | $95.00 | – | 0 |
Seasonality
AILIP 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 | 1.1% | -0.8% | -0.6% | 0.6% | -1.1% | -0.4% | 2.0% | -0.8% | 1.4% | 0.5% | 1.1% | -1.2% |
| Months up | 9 of 10 | 2 of 10 | 2 of 10 | 8 of 10 | 4 of 10 | 2 of 10 | 9 of 10 | 2 of 10 | 3 of 10 | 6 of 10 | 3 of 9 | 2 of 9 |
| 2026 | 2.4% | 0.0% | 3.7% | 1.5% | -3.9% | 2.6% | -1.0% | 0.1% | -0.5% | 0.8% | ||
| 2025 | 2.7% | 0.7% | 0.7% | -4.1% | 1.3% | 0.0% | 4.6% | -4.2% | 9.6% | 0.0% | 0.0% | -6.3% |
| 2024 | 1.5% | -4.2% | 0.0% | 0.1% | 1.5% | -2.8% | 1.2% | 4.8% | 5.7% | -6.0% | 9.4% | -9.0% |
| 2023 | 1.3% | 0.0% | -1.9% | 0.1% | 0.0% | 0.0% | 1.4% | 0.0% | 0.0% | -2.1% | -5.0% | 0.0% |
| 2022 | 1.1% | -3.4% | -1.5% | 1.1% | -8.4% | -5.8% | 3.2% | 0.0% | 0.0% | -0.5% | -1.2% | 0.0% |
| 2021 | 1.0% | 0.0% | 0.0% | -2.7% | 0.0% | 0.0% | 1.1% | -3.1% | 0.8% | 1.1% | 0.1% | 3.8% |
| 2020 | 1.1% | 1.8% | -1.8% | 3.0% | -2.6% | 0.0% | 1.5% | 0.0% | 0.0% | 7.7% | 0.0% | 1.0% |
| 2019 | 3.2% | -2.8% | -0.1% | 1.1% | 0.8% | 0.0% | 1.1% | 0.0% | -0.8% | 1.1% | 0.0% | 0.0% |
| 2018 | -4.1% | 0.0% | 0.0% | 3.3% | 0.0% | 2.1% | 1.1% | 0.0% | -1.0% | 1.1% | 0.0% | 0.0% |
| 2017 | 1.1% | 0.0% | -5.0% | 2.6% | 0.5% | 0.0% | 5.5% | -6.0% | 0.0% | 2.1% | 6.5% | 0.0% |