Other US listings · AILLP · stock
Ameren Illinois Co (AILLP) stock price history
Every Other US listings trading session of Ameren Illinois Co from Mar 10, 1999 to Jul 17, 2026: 6,143 daily bars, adjusted for splits and dividends, with minute bars arriving as capture begins. The full series is served by the API: a free key covers the last year, paid plans the whole history and minute bars.
AILLP adjusted close, 1999 to 2026
- $93.06
- All time high, 2021
- $67.38
- 52 week high, $59.02 low
- 6,143
- Daily sessions since 1999
Last updated Jul 17, 2026, the last stored session. Refreshes after each trading day. Full 1999 to 2026 series and minute bars.
AILLP key facts
- Ameren Illinois Co (AILLP) closed at $65.00 on Jul 17, 2026 on Other US listings.
- AILLP's all time high close is $93.06, set on Aug 10, 2021; its all time low close is $11.26 on Sep 14, 2000.
- AILLP's 52 week range is $59.02 to $67.38.
- AILLP returned +10.1% over the year to Jul 17, 2026 and -9.8% over five years.
- Over ten years AILLP returned +18%, +1.7% a year compounded.
- AILLP's deepest drawdown was -45.0% from Aug 11, 2021 to Oct 16, 2023.
- DataCedar holds 6,143 daily sessions of AILLP history from Mar 10, 1999, adjusted for splits and dividends, served by the API under a key.
AILLP price chart, 1999 to 2026
AILLP returns
Price return from the last close on or before the window start to Jul 17, 2026, on adjusted closes.
| Period | Return |
|---|---|
| 1 month | +1.2% |
| 3 months | +1.2% |
| 6 months | +1.6% |
| Year to date | +0.9% |
| 1 year | +10.1% |
| 3 years | +4.0% |
| 5 years | -9.8% |
| 10 years | +18.2% |
| Since Mar 10, 1999 | +266.9% |
| Compound annual growth, 27.4 years | +4.9% |
AILLP records
Measured on the stored closes; every figure is reproducible from the API series.
- All time high close
- $93.06 on Aug 10, 2021
- All time low close
- $11.26 on Sep 14, 2000
- 52 week high
- $67.38 on Feb 9, 2026
- 52 week low
- $59.02 on Jul 17, 2025
- Deepest drawdown
- -45.0% from Aug 11, 2021 to Oct 16, 2023, not yet recovered
- Best single session
- +25.8% on Aug 10, 2021
- Worst single session
- -21.1% on Aug 12, 2021
- Volatility, 1 year annualised
- 18.8%
- Sessions closing higher, 1 year
- 14%
- Growth of 1 since 1999
- 3.7×
- Best calendar year
- 2004, +26%
- Worst calendar year
- 2022, -19%
AILLP price history by year
Open is the first session's open, high and low span the year, close is the last session's close, and the return is close over the previous year's close. 1999 starts on Mar 10, 1999; 2026 runs to Jul 17, 2026.
| Year | Open | High | Low | Close | Return | Volume | Sessions |
|---|---|---|---|---|---|---|---|
| 2026 | $64.45 | $67.38 | $62.73 | $65.00 | +0.9% | 15.4K | 135 |
| 2025 | $58.18 | $68.15 | $57.91 | $64.45 | +8.9% | 33.1K | 250 |
| 2024 | $55.02 | $65.76 | $54.21 | $59.17 | +7.5% | 41.2K | 252 |
| 2023 | $60.02 | $62.50 | $50.89 | $55.02 | -8.3% | 16.4K | 230 |
| 2022 | $74.52 | $75.29 | $60.02 | $60.02 | -19.5% | 8.3K | 240 |
| 2021 | $73.28 | $93.06 | $69.28 | $74.52 | +1.7% | 13K | 252 |
| 2020 | $67.03 | $74.09 | $63.63 | $73.28 | +9.3% | 12.2K | 253 |
| 2019 | $61.99 | $67.42 | $61.29 | $67.03 | +8.1% | 11.6K | 252 |
| 2018 | $61.32 | $63.33 | $59.65 | $61.99 | +2.2% | 15.2K | 190 |
| 2017 | $60.92 | $61.54 | $56.29 | $60.67 | -0.4% | 65.7K | 156 |
| 2016 | $52.43 | $61.29 | $52.43 | $60.92 | +16.8% | 29.4K | 200 |
| 2015 | $48.41 | $52.70 | $48.41 | $52.13 | +7.7% | 42K | 205 |
| 2014 | $45.33 | $49.40 | $43.31 | $48.41 | +7.8% | 25.2K | 205 |
| 2013 | $44.61 | $48.62 | $43.72 | $44.93 | +0.7% | 55.2K | 229 |
| 2012 | $38.29 | $45.12 | $38.29 | $44.61 | +16.5% | 153.1K | 242 |
| 2011 | $30.93 | $40.01 | $30.93 | $38.29 | +23.8% | 90.7K | 252 |
| 2010 | $26.07 | $50.07 | $26.07 | $30.93 | +18.6% | 53.2K | 241 |
| 2009 | $24.55 | $28.26 | $22.35 | $26.07 | +6.2% | 14.7K | 252 |
| 2008 | $27.17 | $28.77 | $23.32 | $24.55 | -14.5% | 9.2K | 248 |
| 2007 | $26.11 | $30.37 | $24.94 | $28.72 | +10.0% | 21K | 233 |
| 2006 | $24.30 | $29.28 | $24.04 | $26.11 | +7.4% | 58.7K | 236 |
| 2005 | $24.52 | $27.19 | $21.38 | $24.30 | -0.9% | 55.8K | 226 |
| 2004 | $20.21 | $24.52 | $18.94 | $24.52 | +25.6% | 32.4K | 250 |
| 2003 | $16.50 | $22.74 | $16.50 | $19.51 | +18.2% | 19.9K | 252 |
| 2002 | $14.86 | $17.17 | $14.86 | $16.50 | +11.1% | 14.4K | 218 |
| 2001 | $13.29 | $15.56 | $13.13 | $14.85 | +11.8% | 7.7K | 162 |
| 2000 | $15.22 | $15.38 | $11.26 | $13.29 | -17.3% | 13.7K | 114 |
| 1999 | $17.72 | $18.98 | $15.19 | $16.07 | n/a | 21.5K | 168 |
AILLP monthly closes, last 12 months
| Month | Month end close | Change |
|---|---|---|
| July 2026 | $65.00 | +2.3% |
| June 2026 | $63.56 | +0.1% |
| May 2026 | $63.51 | 0.0% |
| April 2026 | $63.51 | -5.8% |
| March 2026 | $67.38 | 0.0% |
| February 2026 | $67.38 | +5.7% |
| January 2026 | $63.75 | -1.1% |
| December 2025 | $64.45 | +1.5% |
| November 2025 | $63.49 | -0.7% |
| October 2025 | $63.97 | +3.6% |
| September 2025 | $61.72 | +1.7% |
| August 2025 | $60.69 | -1.1% |
About the AILLP data
Daily bars. 6,143 sessions from Mar 10, 1999 to Jul 17, 2026, one row per Other US listings trading day with open, high, low, close and volume. Prices are adjusted for splits and cash dividends so the series is comparable across its whole length; the API also serves the raw, split only and dividend only views.
Minute bars. Not stored for this listing yet. Minute history is captured forward from the day collection begins for a symbol and is never backfilled.
Time and currency. Session dates are Other US listings trading days; minute timestamps are UTC. Prices are in USD. Volume is shares traded on the session.
Get the data. The REST endpoint returns the daily series as JSON with pagination; a free key serves the last year, Quant and above the full history back to Mar 10, 1999, and minute bars come with the paid windows. It takes timeframe (1Min, 5Min, 15Min, 1Hour, 1Day), adjustment, start and end. See the bars endpoint and authentication, and pricing for the plan windows.
curl "https://api.datacedar.com/v3/stocks/other%3AAILLP/bars?timeframe=1Day&adjustment=all&limit=50000" \
-H "X-API-Key: YOUR_KEY"Nearby on Other US listings
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Common questions
AILLP share price history
