Aldeyra Therapeutics, Inc. (ALDX) Stock Price History
Historical prices from 2014 to 2026
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ALDX Historical Performance
Short-Term Returns
ALDX Stock Price Trajectory (2014–2026)
As of May 8, 2026, Aldeyra Therapeutics, Inc. (ALDX) trades at $1.73, representing a -13.9% return over the past year. The stock has delivered a -86.1% total return over five years (-32.6% CAGR), reflecting challenging market conditions.
The stock reached its all-time high of $16.70 on September 26, 2018. From this peak, ALDX has corrected -89.6%, currently trading 62% below its 200-day moving average, suggesting potential weakness.
When compared to Healthcare sector peers OCUL (+37.3% 1Y), KALA (-97.6% 1Y), and HALO (-7.1% 1Y), ALDX has underperformed the peer group average. Compare ALDX vs OCUL →
ALDX Historical Price Data (2025–2026)
Showing 30 of 3,023 recordsLoading full history…
| Date | Open | High | Low | Close | Volume | Change % |
|---|---|---|---|---|---|---|
| 2026-05-07 | 1.73 | 1.75 | 1.68 | 1.73 | 632K | -0.57% |
| 2026-05-06 | 1.71 | 1.86 | 1.69 | 1.74 | 1.12M | +1.16% |
| 2026-05-05 | 1.64 | 1.73 | 1.59 | 1.72 | 1.04M | +6.17% |
| 2026-05-04 | 1.57 | 1.68 | 1.57 | 1.62 | 783K | +1.89% |
| 2026-05-01 | 1.52 | 1.60 | 1.51 | 1.59 | 741K | +4.61% |
| 2026-04-30 | 1.51 | 1.60 | 1.49 | 1.52 | 1.11M | +1.33% |
| 2026-04-29 | 1.55 | 1.59 | 1.47 | 1.50 | 701K | -4.46% |
| 2026-04-28 | 1.57 | 1.62 | 1.56 | 1.57 | 725K | -0.63% |
| 2026-04-27 | 1.54 | 1.60 | 1.52 | 1.58 | 1.19M | +1.94% |
| 2026-04-24 | 1.58 | 1.59 | 1.51 | 1.55 | 1.47M | -3.13% |
| 2026-04-23 | 1.70 | 1.70 | 1.57 | 1.60 | 1.44M | -5.88% |
| 2026-04-22 | 1.68 | 1.71 | 1.65 | 1.70 | 1.06M | +1.19% |
| 2026-04-21 | 1.79 | 1.83 | 1.67 | 1.68 | 1.56M | -5.62% |
| 2026-04-20 | 1.78 | 1.81 | 1.75 | 1.78 | 971K | -1.11% |
| 2026-04-17 | 1.85 | 1.86 | 1.79 | 1.80 | 1.25M | 0.00% |
| 2026-04-16 | 1.82 | 1.83 | 1.72 | 1.80 | 1.29M | -1.64% |
| 2026-04-15 | 1.79 | 1.87 | 1.77 | 1.83 | 1.79M | +2.23% |
| 2026-04-14 | 1.79 | 1.89 | 1.75 | 1.79 | 2.02M | -0.56% |
| 2026-04-13 | 1.74 | 1.83 | 1.70 | 1.80 | 1.48M | +1.12% |
| 2026-04-10 | 1.60 | 1.80 | 1.60 | 1.78 | 2.24M | +11.95% |
| 2026-04-09 | 1.54 | 1.63 | 1.52 | 1.59 | 2.63M | +1.27% |
| 2026-04-08 | 1.58 | 1.62 | 1.55 | 1.57 | 1.33M | +3.29% |
| 2026-04-07 | 1.51 | 1.56 | 1.48 | 1.52 | 1.27M | 0.00% |
| 2026-04-06 | 1.64 | 1.66 | 1.52 | 1.52 | 1.91M | -8.43% |
| 2026-04-02 | 1.68 | 1.72 | 1.63 | 1.66 | 1.78M | -1.19% |
| 2026-04-01 | 1.71 | 1.87 | 1.68 | 1.68 | 4.50M | -0.59% |
| 2026-03-31 | 1.73 | 1.81 | 1.67 | 1.69 | 2.31M | +0.60% |
| 2026-03-30 | 1.76 | 1.78 | 1.68 | 1.68 | 1.87M | -5.08% |
| 2026-03-27 | 1.82 | 1.84 | 1.75 | 1.77 | 2.55M | -3.80% |
| 2026-03-26 | 1.81 | 1.88 | 1.73 | 1.84 | 2.93M | -0.54% |
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Start ComparisonALDX — Frequently Asked Questions
Quick answers to the most common questions about buying ALDX stock.
How has ALDX stock performed recently?
ALDX declined -13.9% over the past year, below its 5-year annualized CAGR of -32.6%. The stock trades below its 200-day moving average, reflecting the downtrend.
What is ALDX's all-time high price?
Aldeyra Therapeutics, Inc. reached $16.70 on 2018-09-26. The 52-week high is $6.18. Current 1-year return of -13.9% places the stock further from historical peaks.
Where can I download ALDX historical price data?
This page provides ALDX daily OHLCV data with 50-day MA, 200-day MA, and RSI indicators. Data spans 2014-2026, downloadable in CSV format.