Aldeyra Therapeutics (ALDX) Stock Chart & Stock Price History $5.08 +0.27 (+5.61%) Closing price 08/4/2025 04:00 PM EasternExtended Trading$5.10 +0.01 (+0.30%) As of 08/4/2025 06:26 PM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more. Add Compare Share Share Chart Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Aldeyra Therapeutics Stock Price Performance The Aldeyra Therapeutics (ALDX) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 57.52%, with a year-to-date return of 1.80%. In the past month, the stock has increased 18.00%, reflecting recent market activity. As of the latest close, Aldeyra Therapeutics traded at $5.08 with a market cap of $304.29 million and volume of 1.04 million shares. Five years ago, the stock traded at $7.46, representing a 31.90% decrease over that period. At the time, it had a market cap of $218.36 million and a volume of 1.86 million shares. Receive ALDX Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Aldeyra Therapeutics and its competitors with MarketBeat's FREE daily newsletter. Email Address 5 Day Performance+1.80%1 Month Performance+18.00%3 Month Performance+88.15%Year-To-Date Performance+1.80%1 Year Performance+57.52%5 Year Performance-31.90% ALDX Stock Chart for Tuesday, August, 5, 2025 ALDX Chart by TradingView Aldeyra Therapeutics Stock Price History Daily Weekly Monthly Yearly Time Frame Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 3 Year 5 Year Time Frame Start Date End Date Export to Excel DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization08/04/2025$4.81$5.08+5.61%$5.23$4.801.04 million shs$304.29 million08/01/2025$4.99$4.81-3.61%$4.92$4.231.51 million shs$288.12 million07/31/2025$5.05$4.99-1.19%$5.15$4.94779,965 shs$298.90 million07/30/2025$5.09$5.05-0.79%$5.35$5.00964,879 shs$302.48 million07/29/2025$5.32$5.09-4.32%$5.32$5.021.22 million shs$304.89 million07/28/2025$5.17$5.32+2.90%$5.37$5.12904,734 shs$318.67 million07/25/2025$5.44$5.17-4.96%$5.47$5.131.75 million shs$309.68 million07/24/2025$5.53$5.44-1.63%$5.62$5.39979,812 shs$325.83 million07/23/2025$5.36$5.53+3.17%$5.62$5.37864,501 shs$331.25 million07/22/2025$5.39$5.36-0.56%$5.40$5.21936,906 shs$321.06 million Get the Latest News and Ratings for ALDX and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Aldeyra Therapeutics and its competitors with MarketBeat's FREE daily newsletter. 07/21/2025$5.39$5.39$5.47$5.241.44 million shs$322.84 million07/18/2025$5.03$5.39+7.16%$5.66$5.151.77 million shs$322.86 million07/17/2025$5.16$5.03-2.52%$5.41$4.881.92 million shs$301.28 million07/16/2025$4.97$5.16+3.82%$5.18$4.94717,458 shs$309.08 million07/15/2025$5.01$4.97-0.80%$5.09$4.811.17 million shs$297.68 million07/14/2025$4.65$5.01+7.74%$5.04$4.641.22 million shs$300.08 million07/11/2025$4.80$4.65-3.12%$4.81$4.551.38 million shs$278.52 million07/10/2025$4.52$4.80+6.19%$4.92$4.441.41 million shs$287.52 million07/09/2025$4.33$4.52+4.39%$4.60$4.341.74 million shs$270.75 million07/08/2025$4.35$4.33-0.46%$4.44$4.121.10 million shs$259.35 million07/07/2025$4.31$4.35+1.05%$4.43$4.16906,880 shs$260.57 million07/04/2025$4.31$4.31$4.34$4.00757,113 shs$257.85 million Related Companies CVAC Stock Chart AUPH Stock Chart PRAX Stock Chart CALT Stock Chart PAHC Stock Chart SRPT Stock Chart DYN Stock Chart SANA Stock Chart RCUS Stock Chart PHVS Stock Chart Receive ALDX Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Aldeyra Therapeutics and its competitors with MarketBeat's FREE daily newsletter. This page (NASDAQ:ALDX) was last updated on 8/5/2025 by MarketBeat.com Staff From Our PartnersMan Who Called Nvidia at $1.10 Says Buy This Now...In 2004, one man called Nvidia before just about anyone knew it existed. 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