Nasdaq · ALDX · stock
Aldeyra Therapeutics, Inc. (ALDX) stock price history
Every Nasdaq trading session of Aldeyra Therapeutics, Inc. from May 2, 2014 to Nov 12, 2026: 3,153 daily bars, adjusted for splits and dividends, with minute bars from Jul 13, 2026 forward. The full series is served by the API: a free key covers the last year, paid plans the whole history and minute bars.
ALDX adjusted close, 2014 to 2026
- $14.85
- All time high, 2021
- $5.93
- 52 week high, $0.5270 low
- 3,153
- Daily sessions since 2014
Last updated Nov 12, 2026, the last stored session. Refreshes after each trading day. Full 2014 to 2026 series and minute bars.
ALDX key facts
- Aldeyra Therapeutics, Inc. (ALDX) closed at $0.6301 on Nov 12, 2026 on Nasdaq.
- ALDX's all time high close is $14.85, set on Apr 27, 2021; its all time low close is $0.5600 on Oct 30, 2026.
- ALDX's 52 week range is $0.5270 to $5.93.
- ALDX returned -88.1% over the year to Nov 12, 2026 and -92.9% over five years.
- Over ten years ALDX returned -90%, -20.6% a year compounded.
- ALDX's deepest drawdown was -96.2% from Apr 27, 2021 to Oct 30, 2026.
- DataCedar holds 3,153 daily sessions of ALDX history from May 2, 2014 and minute bars from Jul 13, 2026, adjusted for splits and dividends, served by the API under a key.
ALDX price chart, 2014 to 2026
ALDX returns
Price return from the last close on or before the window start to Nov 12, 2026, on adjusted closes.
| Period | Return |
|---|---|
| 1 month | -30.5% |
| 3 months | -58.5% |
| 6 months | -63.2% |
| Year to date | -87.8% |
| 1 year | -88.1% |
| 3 years | -72.4% |
| 5 years | -92.9% |
| 10 years | -90.0% |
| Since May 2, 2014 | -91.2% |
| Compound annual growth, 12.5 years | -17.7% |
ALDX records
Measured on the stored closes; every figure is reproducible from the API series.
- All time high close
- $14.85 on Apr 27, 2021
- All time low close
- $0.5600 on Oct 30, 2026
- 52 week high
- $5.93 on Jan 30, 2026
- 52 week low
- $0.5270 on Nov 2, 2026
- Deepest drawdown
- -96.2% from Apr 27, 2021 to Oct 30, 2026, not yet recovered
- Best single session
- +70.1% on Sep 14, 2017
- Worst single session
- -73.3% on Apr 3, 2025
- Volatility, 1 year annualised
- 153.6%
- Sessions closing higher, 1 year
- 42%
- Best calendar year
- 2022, +74%
- Worst calendar year
- 2023, -50%
ALDX 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. 2014 starts on May 2, 2014; 2026 runs to Nov 12, 2026.
| Year | Open | High | Low | Close | Return | Volume | Sessions |
|---|---|---|---|---|---|---|---|
| 2026 | $5.12 | $5.93 | $0.5270 | $0.6301 | -87.8% | 373.8M | 218 |
| 2025 | $5.06 | $7.20 | $1.14 | $5.18 | +3.8% | 272.6M | 250 |
| 2024 | $3.46 | $6.55 | $2.71 | $4.99 | +42.2% | 124.2M | 252 |
| 2023 | $7.01 | $11.97 | $1.42 | $3.51 | -49.6% | 348M | 250 |
| 2022 | $4.06 | $7.99 | $2.36 | $6.96 | +74.0% | 186.9M | 251 |
| 2021 | $6.89 | $15.95 | $3.37 | $4.00 | -41.7% | 332.2M | 252 |
| 2020 | $5.90 | $8.70 | $1.48 | $6.86 | +18.1% | 170.3M | 253 |
| 2019 | $8.21 | $12.79 | $4.31 | $5.81 | -30.0% | 89.8M | 252 |
| 2018 | $6.90 | $16.70 | $6.25 | $8.30 | +22.1% | 67.1M | 251 |
| 2017 | $5.35 | $11.90 | $3.80 | $6.80 | +27.1% | 68.2M | 251 |
| 2016 | $6.59 | $8.19 | $3.39 | $5.35 | -21.1% | 10.1M | 252 |
| 2015 | $7.65 | $13.50 | $4.84 | $6.78 | -6.1% | 6M | 252 |
| 2014 | $7.50 | $11.99 | $3.00 | $7.22 | n/a | 3.2M | 169 |
ALDX monthly closes, last 12 months
| Month | Month end close | Change |
|---|---|---|
| November 2026 | $0.6301 | +12.5% |
| October 2026 | $0.5600 | -54.5% |
| September 2026 | $1.23 | -16.9% |
| August 2026 | $1.48 | -3.9% |
| July 2026 | $1.54 | -27.7% |
| June 2026 | $2.13 | +21.7% |
| May 2026 | $1.75 | +15.1% |
| April 2026 | $1.52 | -10.1% |
| March 2026 | $1.69 | -69.0% |
| February 2026 | $5.46 | +1.9% |
| January 2026 | $5.36 | +3.5% |
| December 2025 | $5.18 | -5.5% |
About the ALDX data
Daily bars. 3,153 sessions from May 2, 2014 to Nov 12, 2026, one row per Nasdaq 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. Stored from Jul 13, 2026 forward, most recent session Nov 2, 2026. Minute history is captured from the day collection began and is never backfilled, so this start date is exact. Five minute, fifteen minute and hourly bars are derived from these minutes.
Time and currency. Session dates are Nasdaq 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 May 2, 2014, 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/nasdaq%3AALDX/bars?timeframe=1Day&adjustment=all&limit=50000" \
-H "X-API-Key: YOUR_KEY"Nearby on Nasdaq
Common questions
ALDX share price history
