Other US listings · AILLN · stock
Ameren Illinois Co (AILLN) stock price history
Every Other US listings trading session of Ameren Illinois Co from Feb 9, 2009 to Jul 17, 2026: 4,386 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.
AILLN adjusted close, 2009 to 2026
- $98.81
- All time high, 2021
- $78.50
- 52 week high, $72.05 low
- 4,386
- Daily sessions since 2009
Last updated Jul 17, 2026, the last stored session. Refreshes after each trading day. Full 2009 to 2026 series and minute bars.
AILLN key facts
- Ameren Illinois Co (AILLN) closed at $78.04 on Jul 17, 2026 on Other US listings.
- AILLN's all time high close is $98.81, set on May 19, 2021; its all time low close is $28.55 on Jul 31, 2009.
- AILLN's 52 week range is $72.05 to $78.50.
- AILLN returned +6.7% over the year to Jul 17, 2026 and -0.7% over five years.
- Over ten years AILLN returned +32%, +2.8% a year compounded.
- AILLN's deepest drawdown was -40.3% from Jun 15, 2021 to Oct 4, 2023.
- DataCedar holds 4,386 daily sessions of AILLN history from Feb 9, 2009, adjusted for splits and dividends, served by the API under a key.
AILLN price chart, 2009 to 2026
AILLN returns
Price return from the last close on or before the window start to Jul 17, 2026, on adjusted closes.
| Period | Return |
|---|---|
| 1 month | +1.1% |
| 3 months | +0.4% |
| 6 months | +0.7% |
| Year to date | +3.7% |
| 1 year | +6.7% |
| 3 years | +6.1% |
| 5 years | -0.7% |
| 10 years | +32.4% |
| Since Feb 9, 2009 | +145.5% |
| Compound annual growth, 17.4 years | +5.3% |
AILLN records
Measured on the stored closes; every figure is reproducible from the API series.
- All time high close
- $98.81 on May 19, 2021
- All time low close
- $28.55 on Jul 31, 2009
- 52 week high
- $78.50 on Jun 15, 2026
- 52 week low
- $72.05 on Aug 21, 2025
- Deepest drawdown
- -40.3% from Jun 15, 2021 to Oct 4, 2023, not yet recovered
- Best single session
- +26.7% on May 19, 2021
- Worst single session
- -21.4% on Jun 16, 2021
- Volatility, 1 year annualised
- 10.1%
- Sessions closing higher, 1 year
- 13%
- Growth of 1 since 2009
- 2.5×
- Best calendar year
- 2011, +16%
- Worst calendar year
- 2023, -10%
AILLN 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. 2009 starts on Feb 9, 2009; 2026 runs to Jul 17, 2026.
| Year | Open | High | Low | Close | Return | Volume | Sessions |
|---|---|---|---|---|---|---|---|
| 2026 | $75.25 | $78.50 | $75.25 | $78.04 | +3.7% | 11.3K | 135 |
| 2025 | $69.04 | $77.78 | $60.13 | $75.25 | +9.0% | 31.1K | 250 |
| 2024 | $67.36 | $80.70 | $66.31 | $69.04 | +2.5% | 24.7K | 252 |
| 2023 | $75.00 | $75.40 | $59.01 | $67.36 | -10.2% | 19.4K | 250 |
| 2022 | $78.47 | $79.75 | $72.22 | $75.00 | -4.4% | 8.9K | 251 |
| 2021 | $75.58 | $98.81 | $74.01 | $78.47 | +3.8% | 5.6K | 252 |
| 2020 | $71.49 | $75.58 | $66.41 | $75.58 | +5.7% | 9K | 253 |
| 2019 | $66.85 | $72.53 | $66.85 | $71.49 | +6.9% | 12.5K | 252 |
| 2018 | $61.47 | $67.48 | $61.47 | $66.85 | +8.8% | 35.8K | 251 |
| 2017 | $59.99 | $63.63 | $59.99 | $61.47 | +2.5% | 3.9K | 251 |
| 2016 | $56.84 | $60.29 | $56.84 | $59.99 | +5.6% | 4.6K | 252 |
| 2015 | $53.65 | $56.84 | $53.09 | $56.84 | +7.3% | 7.1K | 252 |
| 2014 | $47.75 | $55.32 | $47.75 | $52.98 | +10.9% | 17.4K | 252 |
| 2013 | $48.34 | $55.43 | $46.72 | $47.75 | -1.2% | 48.1K | 252 |
| 2012 | $42.66 | $48.34 | $42.66 | $48.34 | +13.3% | 89.9K | 250 |
| 2011 | $36.91 | $42.66 | $36.43 | $42.66 | +15.6% | 57.9K | 252 |
| 2010 | $32.01 | $37.46 | $31.28 | $36.91 | +15.3% | 121.3K | 252 |
| 2009 | $31.79 | $32.77 | $28.55 | $32.01 | n/a | 22.3K | 227 |
AILLN monthly closes, last 12 months
| Month | Month end close | Change |
|---|---|---|
| July 2026 | $78.04 | +1.1% |
| June 2026 | $77.22 | -0.0% |
| May 2026 | $77.22 | -0.8% |
| April 2026 | $77.86 | +0.9% |
| March 2026 | $77.15 | 0.0% |
| February 2026 | $77.15 | +1.0% |
| January 2026 | $76.42 | +1.6% |
| December 2025 | $75.25 | -0.2% |
| November 2025 | $75.40 | 0.0% |
| October 2025 | $75.40 | +1.7% |
| September 2025 | $74.14 | -0.1% |
| August 2025 | $74.19 | +0.8% |
About the AILLN data
Daily bars. 4,386 sessions from Feb 9, 2009 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 Feb 9, 2009, 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/AILLN/bars?timeframe=1Day&adjustment=all&limit=50000" \
-H "X-API-Key: YOUR_KEY"Nearby on Other US listings
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Common questions
AILLN share price history
