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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 week, newest first. Adjusted for stock splits, not for dividends.

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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
Week ofOpenHighLowCloseChangeVolume
Oct 19, 2026$70.35$70.35$70.35$70.350.00%0
Oct 12, 2026$70.35$70.35$70.35$70.350.00%0
Oct 5, 2026$70.35$70.35$70.35$70.350.00%0
Sep 28, 2026$70.35$70.35$70.35$70.350.00%0
Sep 21, 2026$70.35$70.35$70.35$70.35-0.92%100
Sep 14, 2026$71.00$71.00$71.00$71.000.00%0
Sep 8, 2026$71.00$71.00$71.00$71.000.00%0
Aug 31, 2026$72.00$72.00$71.00$71.00-1.39%1,000
Aug 24, 2026$71.00$72.00$71.00$72.00+1.41%125
Aug 17, 2026$71.00$71.00$71.00$71.000.00%0
Aug 10, 2026$71.00$71.00$71.00$71.000.00%0
Aug 3, 2026$71.00$71.00$71.00$71.000.00%0
Jul 27, 2026$71.00$71.00$71.00$71.000.00%0
Jul 20, 2026$71.35$73.50$71.00$71.00-0.49%850
Jul 13, 2026$71.00$71.35$71.00$71.35+0.49%550
Jul 6, 2026$71.00$71.00$71.00$71.000.00%0
Jun 29, 2026$71.00$71.00$71.00$71.000.00%0
Jun 22, 2026$71.00$71.00$71.00$71.000.00%0
Jun 15, 2026$71.00$71.00$71.00$71.000.00%0
Jun 8, 2026$73.25$73.25$71.00$71.00-3.07%300
Jun 1, 2026$73.25$73.25$73.25$73.250.00%0
May 26, 2026$73.25$73.25$73.25$73.250.00%0
May 18, 2026$73.25$73.25$73.25$73.250.00%0
May 11, 2026$73.25$73.25$73.25$73.250.00%0
May 4, 2026$73.25$73.25$73.25$73.250.00%0
Apr 27, 2026$73.25$73.25$73.25$73.250.00%0
Apr 20, 2026$73.25$73.25$73.25$73.250.00%0
Apr 13, 2026$73.25$73.25$73.25$73.250.00%0
Apr 6, 2026$73.25$73.25$73.25$73.250.00%0
Mar 30, 2026$73.25$73.25$73.25$73.250.00%0
Mar 23, 2026$73.25$73.25$73.25$73.250.00%0
Mar 16, 2026$73.25$73.25$73.25$73.250.00%0
Mar 9, 2026$73.25$73.25$73.25$73.250.00%0
Mar 2, 2026$73.25$73.25$73.25$73.250.00%0
Feb 23, 2026$73.25$73.25$73.25$73.250.00%0
Feb 17, 2026$73.25$73.25$73.25$73.250.00%0
Feb 9, 2026$73.25$73.25$73.25$73.250.00%0
Feb 2, 2026$73.25$73.25$73.25$73.250.00%0
Jan 26, 2026$73.25$73.25$73.25$73.250.00%0
Jan 20, 2026$73.25$73.25$73.25$73.250.00%0
Jan 12, 2026$73.25$73.25$73.25$73.250.00%0
Jan 5, 2026$73.25$73.25$73.25$73.250.00%0
Dec 29, 2025$73.25$73.25$73.25$73.25-1.35%237
Dec 22, 2025$72.85$74.25$72.54$74.25+1.92%255
Dec 15, 2025$72.88$72.88$72.60$72.85-0.04%200
Dec 8, 2025$72.88$72.88$72.88$72.880.00%0
Dec 1, 2025$72.88$72.88$72.88$72.88+0.01%0
Nov 24, 2025$72.25$72.88$70.69$72.88+0.87%499
Nov 17, 2025$72.25$72.25$72.25$72.250.00%0
Nov 10, 2025$72.25$72.25$72.25$72.250.00%0
Nov 3, 2025$72.25$72.25$72.25$72.250.00%0
Oct 27, 2025$72.25$72.25$72.25$72.250.00%0

Seasonality

AILIN return in each calendar month over the last 10 years, including dividends. The current month runs to the latest close.

YearJanFebMarAprMayJunJulAugSepOctNovDec
Average1.4%-1.7%0.5%-0.2%-0.7%0.5%2.1%-1.1%-0.1%1.0%0.1%1.2%
Months up10 of 101 of 101 of 108 of 100 of 101 of 1010 of 103 of 101 of 108 of 102 of 92 of 9
20261.5%0.0%0.0%1.5%0.0%-3.1%1.6%1.4%-2.3%1.6%
20252.0%-2.9%0.0%3.4%0.0%-0.7%0.1%0.0%0.0%3.3%0.9%0.5%
20241.6%0.0%0.0%1.6%-1.3%0.0%1.9%3.9%2.7%1.2%-1.7%-0.7%
20231.2%-16.7%5.3%0.1%0.0%0.0%1.4%0.0%0.0%1.4%0.0%-9.0%
20221.1%0.0%0.0%-11.0%0.0%0.0%1.3%-14.8%0.0%1.5%0.0%20.0%
20211.1%2.8%0.0%-1.8%0.0%0.0%3.1%-2.8%0.0%1.1%1.9%0.0%
20201.1%0.0%0.0%1.1%0.0%0.0%1.1%0.0%-0.8%1.1%0.0%0.0%
20191.2%0.0%0.0%1.2%0.0%0.0%4.3%1.0%0.0%1.1%0.0%0.0%
20181.7%0.0%0.0%1.2%0.0%0.0%3.2%0.0%-1.0%-0.9%0.0%0.0%
20171.2%0.0%0.0%1.2%-6.1%8.5%2.4%0.0%0.0%-1.4%0.0%0.0%