NASDAQ:ALDX

Aldeyra Therapeutics Stock Price (Quote)

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$2.05
+0.0900 (+4.59%)
At Close: Jun 22, 2026

Range Low Price High Price Comment
30 days $1.53 $2.15 Monday, 22nd Jun 2026 ALDX stock ended at $2.05. This is 4.59% more than the trading day before Thursday, 18th Jun 2026. During the day the stock fluctuated 10.26% from a day low at $1.95 to a day high of $2.15.
90 days $1.47 $2.33
52 weeks $1.07 $6.18

Historical Aldeyra Therapeutics prices

Date Open High Low Close Volume
Jun 22, 2026 $1.95 $2.15 $1.95 $2.05 1 662 826
Jun 18, 2026 $1.88 $1.99 $1.87 $1.96 2 183 496
Jun 17, 2026 $1.79 $1.92 $1.77 $1.83 1 277 680
Jun 16, 2026 $1.77 $1.84 $1.75 $1.78 923 686
Jun 15, 2026 $1.83 $1.83 $1.74 $1.76 609 291
Jun 12, 2026 $1.71 $1.78 $1.70 $1.76 826 520
Jun 11, 2026 $1.68 $1.73 $1.66 $1.71 1 178 970
Jun 10, 2026 $1.71 $1.80 $1.65 $1.69 896 008
Jun 09, 2026 $1.76 $1.83 $1.68 $1.72 922 385
Jun 08, 2026 $1.90 $1.97 $1.74 $1.74 1 771 243
Jun 05, 2026 $1.76 $1.76 $1.62 $1.63 946 330
Jun 04, 2026 $1.86 $1.93 $1.75 $1.76 1 073 825
Jun 03, 2026 $1.64 $1.87 $1.59 $1.86 1 951 494
Jun 02, 2026 $1.65 $1.69 $1.58 $1.64 880 751
Jun 01, 2026 $1.73 $1.74 $1.62 $1.66 677 660
May 29, 2026 $1.73 $1.75 $1.68 $1.75 575 678
May 28, 2026 $1.73 $1.79 $1.69 $1.75 1 221 787
May 27, 2026 $1.74 $1.78 $1.68 $1.71 763 872
May 26, 2026 $1.55 $1.78 $1.53 $1.78 1 960 642
May 22, 2026 $1.57 $1.62 $1.53 $1.55 466 729
May 21, 2026 $1.52 $1.59 $1.51 $1.59 621 089
May 20, 2026 $1.54 $1.57 $1.51 $1.55 830 011
May 19, 2026 $1.58 $1.58 $1.53 $1.54 709 201
May 18, 2026 $1.67 $1.69 $1.58 $1.60 1 020 892
May 15, 2026 $1.63 $1.71 $1.60 $1.68 1 308 630

FAQ

What are historical stock prices?
Historical stock prices refer to a stock’s recorded prices at various past points. These prices include several key figures that help investors and analysts evaluate a stock’s performance over time:
Open: Open price for the trading day.
High: Highest price for the trading day.
Low: Lowest price for the trading day.
Close: Close price for the trading day.

Additionally, historical prices often include:
Volume is the number of shares traded during the day. It indicates how actively a stock was traded and can provide insights into market sentiment and liquidity.

How can I use ALDX stock historical prices to predict future price movements?
Trend Analysis: Examine the ALDX stock’s historical trends to identify patterns that might continue.
Moving Averages: Use moving averages to detect potential reversal points.
Momentum Indicators: Apply indicators like RSI or MACD to assess the momentum and strength of price movements.
Volume Analysis: Analyze trading volume alongside price changes to gauge trend strength.
Statistical Methods: Use statistical tools such as regression analysis to model and forecast future prices based on past data.
These techniques can provide insights but should be used with risk management practices to mitigate potential losses.

What impact do stock splits have on historical price data?
When a company performs a stock split, it adjusts the historical price data to reflect the new, lower trading price as if it had always been that way.

This ensures consistency for anyone analyzing the stock’s past prices. The adjustment helps prevent misleading signals on charts, such as false sell signals or bearish trends that aren’t there. For instance, in a 2-for-1 stock split, the price per share is cut in half, which would otherwise appear as a dramatic drop on the chart. If someone didn’t know about the split, they might wrongly think something negative happened to the company. Most technical indicators would also react to this apparent drop by signaling to sell.

A stock split, while making the shares seem more affordable and potentially more attractive to investors, doesn’t alter the company’s fundamental value.

Why do the ALDX stock historical prices show a range for periods like 30 days, 90 days, and 52 weeks?
The range provides the lowest and highest prices at which the stock has traded during the specified period. This helps investors understand the stock’s volatility and price variability within that timeframe.

How can I use historical price volatility to assess risk?
High price volatility historically indicates higher risk and potentially higher returns. Investors can gauge the stock’s risk level by examining the range between high and low prices over various periods.
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ABOUT ALDEYRA THERAPEUTICS
Aldeyra Therapeutics
Aldeyra Therapeutics, Inc., a biotechnology company, develops and commercializes medicines for immune-mediated ocular and systemic diseases. The company's lead product candidate is reproxalap, a reactive aldehyde species (RASP)modulator, which is in Phase III clinical trial for the treatment of dry eye diseases and allergic conjunctivitis. It also develops ADX-629, a first-in-class orally administered RASP modulator that is Phase II clinical tria...
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