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Ameren Illinois Co (AILLP) stock

AILLPOTCElectric & Other Services CombinedFiscal year ends December 31Also trades as AILIH, AILIM, AILIN, AILIO, AILIP, AILLI, AILLM, AILLN, AILLO
Last filing: 10-Q on Aug 3, 2026
$60.54+0.24 (+0.39%)

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
$60.54
+0.39% on the day
52-week range
$60.30 – $70.00
-13.5% from the high
Change over 52 weeks
-9.6%
From $67.00 on Oct 17, 2025
Average volume
224
Shares a day, last 90 sessions
Week ofOpenHighLowCloseChangeVolume
Oct 19, 2026$60.54$60.54$60.54$60.54+0.39%150
Oct 12, 2026$61.75$61.75$60.30$60.30-2.35%280
Oct 5, 2026$61.75$61.75$61.75$61.750.00%0
Sep 28, 2026$63.10$63.10$61.75$61.75-0.80%1,347
Sep 21, 2026$63.25$63.25$62.25$62.25-1.58%985
Sep 14, 2026$62.30$63.50$62.00$63.25+0.80%646
Sep 8, 2026$62.75$62.75$62.75$62.750.00%0
Aug 31, 2026$62.75$62.75$62.65$62.750.00%1,081
Aug 24, 2026$62.75$62.75$62.75$62.750.00%0
Aug 17, 2026$62.90$63.00$62.23$62.75-0.24%2,286
Aug 10, 2026$62.90$62.90$62.90$62.900.00%0
Aug 3, 2026$63.90$64.00$62.50$62.90-1.56%1,363
Jul 27, 2026$65.00$65.00$63.80$63.90-1.69%5,400
Jul 20, 2026$63.55$65.04$63.55$65.000.00%1,600
Jul 13, 2026$65.00$65.00$64.17$65.000.00%1,504
Jul 6, 2026$64.55$65.00$64.55$65.00+0.70%105
Jun 29, 2026$64.30$64.55$64.30$64.55+0.45%300
Jun 22, 2026$65.25$65.25$63.78$64.26-1.52%1,414
Jun 15, 2026$65.25$65.25$65.25$65.250.00%0
Jun 8, 2026$68.00$68.00$65.00$65.25-4.04%1,962
Jun 1, 2026$68.00$68.00$68.00$68.00+5.43%1,200
May 26, 2026$64.37$67.25$64.28$64.50+0.20%1,940
May 18, 2026$64.45$64.45$64.37$64.37-0.12%649
May 11, 2026$64.45$64.45$64.45$64.45-0.08%160
May 4, 2026$64.50$64.50$64.50$64.500.00%0
Apr 27, 2026$64.50$64.50$64.50$64.50-0.77%190
Apr 20, 2026$65.26$65.26$65.00$65.00-0.40%1,000
Apr 13, 2026$65.26$65.26$65.26$65.260.00%0
Apr 6, 2026$65.26$65.26$65.26$65.260.00%0
Mar 30, 2026$69.50$69.50$65.26$65.26-6.10%300
Mar 23, 2026$69.50$69.50$69.50$69.500.00%0
Mar 16, 2026$69.50$69.50$69.50$69.500.00%0
Mar 9, 2026$69.50$69.50$69.50$69.500.00%0
Mar 2, 2026$69.50$69.50$69.50$69.500.00%0
Feb 23, 2026$69.50$69.50$69.50$69.500.00%0
Feb 17, 2026$69.50$69.50$69.50$69.500.00%277
Feb 9, 2026$69.50$69.50$69.50$69.50+2.21%815
Feb 2, 2026$67.00$68.00$64.70$68.00+3.42%1,581
Jan 26, 2026$65.00$65.75$65.00$65.75+1.15%1,237
Jan 20, 2026$65.00$65.00$65.00$65.00-1.52%203
Jan 12, 2026$66.00$66.00$66.00$66.000.00%0
Jan 5, 2026$67.50$67.50$65.75$66.00-2.22%466
Dec 29, 2025$67.50$67.50$67.50$67.500.00%0
Dec 22, 2025$69.50$69.50$67.50$67.50-2.88%448
Dec 15, 2025$69.50$69.50$69.50$69.500.00%0
Dec 8, 2025$69.50$69.50$69.50$69.500.00%0
Dec 1, 2025$66.50$70.00$65.75$69.50+4.51%1,530
Nov 24, 2025$66.50$66.50$66.50$66.500.00%0
Nov 17, 2025$66.50$66.50$65.90$66.500.00%312
Nov 10, 2025$65.50$66.50$65.50$66.50+0.76%392
Nov 3, 2025$67.00$67.00$66.00$66.00-1.49%403
Oct 27, 2025$67.00$67.00$67.00$67.000.00%402

Seasonality

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

YearJanFebMarAprMayJunJulAugSepOctNovDec
Average0.4%0.6%-0.8%-0.3%-0.6%0.2%0.4%-0.1%0.8%0.3%-1.3%0.8%
Months up8 of 105 of 101 of 105 of 105 of 105 of 107 of 104 of 104 of 107 of 103 of 94 of 9
2026-1.1%5.7%0.0%-5.8%0.0%0.1%0.5%-1.8%-1.3%-0.7%
20250.9%0.8%0.0%-0.7%-2.4%4.1%1.1%-1.1%1.7%3.6%-0.7%1.5%
20243.1%-0.0%-0.7%-0.9%1.6%-1.4%2.9%3.8%4.9%-4.1%-1.6%-0.0%
20231.4%0.7%-2.0%1.4%0.3%1.0%-3.4%-4.4%-1.9%-7.5%0.0%6.6%
20221.0%-4.6%0.0%-4.3%-4.6%-4.8%-2.6%5.2%0.0%1.5%-7.6%0.0%
20210.9%-2.5%-1.3%2.3%0.1%0.0%-0.3%1.8%0.0%3.3%-4.0%1.6%
20201.1%-0.3%-2.1%0.5%1.1%2.1%0.9%-0.8%5.8%1.0%-1.5%1.4%
20191.1%1.4%0.0%1.6%0.3%0.0%1.1%1.1%-1.6%1.1%2.5%-0.6%
20181.3%-1.1%1.9%-1.1%-1.3%0.3%2.2%-3.2%0.0%4.5%0.5%-1.6%
2017-6.0%5.6%-3.7%3.9%-0.8%0.0%1.6%-1.0%0.8%0.5%0.5%-1.3%