Aldeyra Therapeutics, Inc. (ALDX) Stock Chart
ALDX price chart
Daily prices adjusted for splits and dividends. 1D and 5D show delayed intraday prices. Markers: E earnings, D dividend, S split.
Technical snapshot
Key levels & statistics
ALDX performance vs the market
Total return, dividends reinvestedALDX monthly returns
ALDX historical prices
ALDX dividends & splits
About the ALDX chart
Aldeyra Therapeutics (ALDX) closed at $0.70 on October 16, 2026, down 86.5% so far this year. The stock is trading 71.6% below its 200-day moving average of $2.46, which technical analysts usually read as a long-term downtrend. Over the past year ALDX returned −87.0% including dividends, behind the S&P 500 (+16.8%).
This page charts the full trading history of Aldeyra Therapeutics, Inc. stock. Daily prices come from EODHD and are adjusted for stock splits and dividends, so returns over long periods are comparable. For the latest quote, company profile, earnings and news, see the ALDX stock overview.
ALDX chart FAQ
What is Aldeyra Therapeutics's all-time high stock price?
The highest closing price for ALDX was $14.85 on April 27, 2021 (adjusted for stock splits). As of the October 16, 2026 close it traded 95.3% below that level.
What is the 52-week range of ALDX stock?
Over the 52 weeks to October 16, 2026, ALDX traded between an intraday low of $0.65 on October 16, 2026 and an intraday high of $5.93 on January 30, 2026.
Is ALDX above its 200-day moving average?
No. On October 16, 2026 ALDX closed at $0.70, 71.6% below its 200-day simple moving average of $2.46. The 50-day average was $1.32.
How has ALDX stock performed compared with the S&P 500?
Including reinvested dividends, ALDX returned −87.0% over the past year, compared with +16.8% for the S&P 500 (SPY). Over five years the figures were −91.6% and +83.0%.
Does Aldeyra Therapeutics pay a dividend?
Aldeyra Therapeutics has not paid a dividend in the past 12 months.
How do I read the ALDX chart?
Pick a time range above the chart and choose candlesticks, a line or an area chart. Moving averages, Bollinger Bands, volume, RSI and MACD can be switched on with the indicator buttons, and "Compare" plots ALDX against the S&P 500, its sector or a competitor as a percentage change. Chart prices are adjusted for splits and dividends.