StockData
Ameren Illinois Co logo

Ameren Illinois Co (AILLM) stock

AILLMOTCElectric & Other Services CombinedFiscal year ends December 31Also trades as AILIH, AILIM, AILIN, AILIO, AILIP, AILLI, AILLN, AILLO, AILLP
Last filing: 10-Q on Aug 3, 2026
$76.00+0.00 (0.00%)

Close on Oct 19, 2026Market cap –P/E –Yield –

Price history

Ameren Illinois share prices for every trading day, newest first. Adjusted for stock splits, not for dividends.

Download all as CSV
Close, Oct 19, 2026
$76.00
0.00% on the day
52-week range
$76.00 – $82.74
-8.1% from the high
Change over 52 weeks
-4.1%
From $79.27 on Oct 17, 2025
Average volume
9
Shares a day, last 90 sessions
DateOpenHighLowCloseChangeVolume
Oct 19, 2026$76.00$76.00$76.00$76.000.00%0
Oct 16, 2026$76.00$76.00$76.00$76.00-3.31%200
Oct 15, 2026$78.60$78.60$78.60$78.600.00%0
Oct 14, 2026$78.60$78.60$78.60$78.600.00%0
Oct 13, 2026$78.60$78.60$78.60$78.600.00%0
Oct 12, 2026$78.60$78.60$78.60$78.600.00%0
Oct 9, 2026$78.60$78.60$78.60$78.600.00%0
Oct 8, 2026$78.60$78.60$78.60$78.600.00%0
Oct 7, 2026$78.60$78.60$78.60$78.600.00%0
Oct 6, 2026$78.60$78.60$78.60$78.600.00%0
Oct 5, 2026$78.60$78.60$78.60$78.600.00%0
Oct 2, 2026$78.60$78.60$78.60$78.600.00%0
Oct 1, 2026$78.60$78.60$78.60$78.600.00%0
Sep 30, 2026$78.60$78.60$78.60$78.600.00%0
Sep 29, 2026$78.60$78.60$78.60$78.600.00%0
Sep 28, 2026$78.60$78.60$78.60$78.600.00%0
Sep 25, 2026$78.60$78.60$78.60$78.600.00%0
Sep 24, 2026$78.60$78.60$78.60$78.600.00%0
Sep 23, 2026$78.60$78.60$78.60$78.600.00%0
Sep 22, 2026$78.60$78.60$78.60$78.600.00%0
Sep 21, 2026$78.60$78.60$78.60$78.600.00%0
Sep 18, 2026$78.60$78.60$78.60$78.600.00%0
Sep 17, 2026$78.60$78.60$78.60$78.600.00%0
Sep 16, 2026$78.60$78.60$78.60$78.600.00%0
Sep 15, 2026$78.60$78.60$78.60$78.600.00%0
Sep 14, 2026$78.60$78.60$78.60$78.600.00%0
Sep 11, 2026$78.60$78.60$78.60$78.600.00%0
Sep 10, 2026$78.60$78.60$78.60$78.600.00%0
Sep 9, 2026$78.60$78.60$78.60$78.600.00%0
Sep 8, 2026$78.60$78.60$78.60$78.600.00%0

Seasonality

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

YearJanFebMarAprMayJunJulAugSepOctNovDec
Average1.9%-0.5%0.1%1.4%-0.5%0.0%2.0%-0.4%0.3%0.3%-0.4%-1.9%
Months up10 of 104 of 103 of 107 of 105 of 102 of 109 of 105 of 102 of 106 of 101 of 92 of 9
20261.6%0.6%3.4%-1.9%-1.3%0.0%2.2%-0.8%0.0%-1.8%
20254.1%1.3%0.0%-2.2%1.0%-1.0%1.6%3.3%-1.9%2.2%-0.2%-0.1%
20241.6%4.3%0.0%1.6%0.6%-1.6%3.2%-1.2%6.3%3.8%-1.7%-7.7%
20234.9%3.4%-2.7%4.2%0.0%0.0%1.4%-4.7%-2.0%-4.4%-2.5%-2.2%
20221.1%-4.2%1.5%0.1%-6.9%0.2%7.6%-6.4%0.0%1.4%0.0%-7.5%
20211.1%-4.5%0.0%1.2%-1.0%0.0%1.2%0.2%0.0%1.2%0.0%0.3%
20201.2%0.0%-3.9%5.3%0.5%0.0%0.0%0.0%1.2%5.2%0.0%0.0%
20191.3%0.0%0.0%5.7%5.9%-1.7%1.2%2.5%-0.2%1.2%-0.7%0.5%
20181.2%0.0%0.0%-1.0%2.8%-3.4%0.2%1.0%0.0%-4.9%0.0%0.0%
20171.2%-5.4%3.1%1.2%-7.0%7.5%1.2%2.0%0.0%-0.8%2.0%0.0%