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Ameren Illinois Co (AILIM) stock

AILIMOTCElectric & Other Services CombinedFiscal year ends December 31Also trades as AILIH, AILIN, AILIO, AILIP, AILLI, AILLM, AILLN, AILLO, AILLP
Last filing: 10-Q on Aug 3, 2026
$75.50−0.25 (-0.33%)

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
$75.50
-0.33% on the day
52-week range
$74.30 – $81.00
-6.8% from the high
Change over 52 weeks
-1.9%
From $77.00 on Oct 17, 2025
Average volume
11
Shares a day, last 90 sessions
Week ofOpenHighLowCloseChangeVolume
Oct 19, 2026$74.30$75.50$74.30$75.50-0.33%300
Oct 12, 2026$75.75$75.75$75.75$75.750.00%0
Oct 5, 2026$75.75$75.75$75.75$75.750.00%0
Sep 28, 2026$75.77$75.77$75.75$75.75-1.62%200
Sep 21, 2026$77.00$77.00$77.00$77.000.00%0
Sep 14, 2026$77.00$77.00$77.00$77.000.00%0
Sep 8, 2026$77.00$77.00$77.00$77.000.00%0
Aug 31, 2026$77.00$77.00$77.00$77.000.00%0
Aug 24, 2026$77.00$77.00$77.00$77.000.00%0
Aug 17, 2026$77.00$77.00$77.00$77.000.00%0
Aug 10, 2026$77.00$77.00$77.00$77.000.00%0
Aug 3, 2026$77.00$77.00$77.00$77.000.00%0
Jul 27, 2026$77.00$77.00$77.00$77.000.00%0
Jul 20, 2026$75.50$77.00$75.50$77.00+1.99%200
Jul 13, 2026$75.50$75.50$75.50$75.500.00%0
Jul 6, 2026$76.00$76.00$75.50$75.50-0.66%125
Jun 29, 2026$76.00$76.00$76.00$76.000.00%0
Jun 22, 2026$75.43$76.00$75.43$76.00+0.76%146
Jun 15, 2026$75.43$75.43$75.43$75.430.00%0
Jun 8, 2026$78.00$78.00$75.43$75.43-5.71%370
Jun 1, 2026$80.00$80.00$80.00$80.000.00%0
May 26, 2026$80.00$80.00$80.00$80.000.00%0
May 18, 2026$80.00$80.00$80.00$80.000.00%0
May 11, 2026$77.00$80.00$77.00$80.00+3.90%490
May 4, 2026$77.00$77.00$77.00$77.000.00%0
Apr 27, 2026$77.00$77.00$77.00$77.000.00%0
Apr 20, 2026$77.00$77.00$77.00$77.000.00%0
Apr 13, 2026$77.00$77.00$77.00$77.000.00%0
Apr 6, 2026$77.00$77.00$77.00$77.000.00%0
Mar 30, 2026$81.00$81.00$77.00$77.00-4.94%200
Mar 23, 2026$81.00$81.00$81.00$81.000.00%0
Mar 16, 2026$79.00$81.00$79.00$81.00+2.53%160
Mar 9, 2026$79.00$79.00$79.00$79.000.00%0
Mar 2, 2026$79.00$79.00$79.00$79.000.00%0
Feb 23, 2026$79.00$79.00$79.00$79.00-0.94%100
Feb 17, 2026$79.25$79.75$79.25$79.75+4.32%605
Feb 9, 2026$75.25$76.45$75.25$76.45+1.59%172
Feb 2, 2026$77.25$77.25$75.25$75.25-2.59%606
Jan 26, 2026$77.25$77.25$77.25$77.250.00%0
Jan 20, 2026$77.25$77.25$77.25$77.250.00%0
Jan 12, 2026$77.25$77.25$77.25$77.250.00%0
Jan 5, 2026$77.25$77.25$77.25$77.25+0.32%135
Dec 29, 2025$77.00$77.00$77.00$77.00-0.32%147
Dec 22, 2025$77.25$77.25$77.25$77.250.00%0
Dec 15, 2025$77.25$77.25$77.25$77.250.00%0
Dec 8, 2025$77.00$77.25$77.00$77.25+0.32%100
Dec 1, 2025$77.00$77.00$77.00$77.000.00%0
Nov 24, 2025$77.00$77.00$77.00$77.000.00%0
Nov 17, 2025$77.00$77.00$77.00$77.000.00%0
Nov 10, 2025$77.00$77.00$77.00$77.00-0.65%200
Nov 3, 2025$77.00$77.50$77.00$77.50+0.65%100
Oct 27, 2025$77.00$77.00$77.00$77.000.00%789

Seasonality

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

YearJanFebMarAprMayJunJulAugSepOctNovDec
Average1.4%-0.1%-1.3%-0.4%0.4%-1.1%2.7%-0.3%0.2%1.5%0.5%-0.7%
Months up9 of 102 of 104 of 106 of 102 of 100 of 1010 of 101 of 101 of 109 of 104 of 92 of 9
20261.9%2.3%2.5%-3.5%3.9%-5.0%2.9%0.0%-1.6%1.2%
20250.4%1.1%1.5%-2.3%-0.2%-3.0%5.0%2.3%0.0%0.6%0.0%0.0%
20243.4%0.0%0.5%-1.3%-0.9%-1.8%6.5%0.0%3.8%-1.0%-1.4%-0.1%
20231.2%0.0%-10.2%1.4%-0.2%0.0%1.4%-3.3%0.0%1.4%0.0%-7.4%
2022-0.1%-1.7%0.0%-3.6%1.8%-1.2%1.2%0.0%0.0%1.2%0.0%0.0%
20211.1%-0.8%-0.9%1.4%-0.2%0.0%1.3%-1.3%0.0%1.2%2.0%0.0%
20201.2%0.0%0.1%0.6%0.0%0.0%1.2%0.0%0.0%4.2%0.5%0.5%
20192.7%0.0%-2.4%1.2%0.0%0.0%2.3%-0.5%0.0%1.2%0.0%-0.5%
20181.2%0.0%-3.6%1.2%0.0%0.0%1.2%0.0%0.0%1.2%2.0%0.0%
20171.2%-1.7%0.0%1.2%0.0%0.0%3.5%0.0%0.0%3.3%1.7%1.0%