Trending NewsTrending NewsNASDAQ:ALDX Aldeyra Therapeutics (ALDX) Stock Price, News & Analysis $1.75 0.00 (0.00%) Closing price 04:00 PM EasternExtended Trading$1.72 -0.03 (-2.00%) As of 07:49 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 Massive. Learn more. Add Compare Share Share Stock Analysis Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock About Aldeyra Therapeutics Stock (NASDAQ:ALDX) View Price History Chart DataSkip Price History Chart 1 Day 5 Days 30 Days 90 Days 1 Year Advanced 1 Day 1 Day 5 Days 30 Days 90 Days 1 Year Advanced Show volume Show extended hours Get Aldeyra Therapeutics alerts:Sign Up Key Stats Today's Range$1.67▼$1.7550-Day Range$1.50▼$2.2352-Week Range$1.07▼$6.18Volume576,683 shsAverage Volume889,579 shsMarket Capitalization$105.56 millionP/E RatioN/ADividend YieldN/APrice Target$5.50Consensus RatingHold Company Overview Aldeyra Therapeutics, Inc. is a clinical-stage biopharmaceutical company focused on the discovery, development and commercialization of novel small molecule therapies for immune-mediated diseases. The company’s research efforts center on targeted alkenals, a class of reactive aldehyde species that play a key role in inflammatory pathways. By selectively modulating these pathways, Aldeyra aims to address both ocular and systemic indications with high unmet medical need. The company’s lead product candidate, reproxalap, is being investigated in several ophthalmic disorders, including dry eye disease, allergic conjunctivitis and non-infectious anterior uveitis. Aldeyra is also developing ADX-2191, an intravitreal formulation targeting proliferative vitreoretinopathy, a serious complication of retinal detachment surgery. In addition to its ophthalmology pipeline, Aldeyra has earlier-stage programs exploring systemic indications where reactive aldehyde species contribute to inflammation and tissue damage. Founded in 2009 and headquartered in Lexington, Massachusetts, Aldeyra is led by a management team with extensive experience in ophthalmology and biopharmaceutical development. Under the leadership of Chief Executive Officer Fredric A. Hargreaves, the company collaborates with clinical research centers across North America and Europe to advance its pipeline through late-stage clinical trials. Aldeyra’s strategy emphasizes rigorous clinical validation, strategic partnerships and readiness for commercial launch upon regulatory approval.AI Generated. May Contain Errors. Read More Aldeyra Therapeutics Stock Analysis - MarketRank™See Top-Rated MarketRank™ Stocks69th Percentile Overall ScoreALDX MarketRank™: Aldeyra Therapeutics scored higher than 69% of companies evaluated by MarketBeat, and ranked 275th out of 871 stocks in the medical sector. Scores are calculated by averaging available category scores, with extra weight given to analysis and valuation. Analyst's Opinion3.6 / 5Analyst RatingHold Consensus RatingAldeyra Therapeutics has received a consensus rating of Hold. The company's average rating score is 2.00, and is based on no strong buy ratings, 1 buy rating, 2 hold ratings, and 1 sell rating.Upside PotentialAldeyra Therapeutics has a consensus price target of $5.50, representing about 214.3% upside from its current price of $1.75.Amount of Analyst CoverageAldeyra Therapeutics has only been the subject of 3 research reports in the past 90 days.Read more about Aldeyra Therapeutics' stock forecast and price target. Earnings and Valuation0.6 / 5Proj. Earnings GrowthGrowing Earnings GrowthEarnings for Aldeyra Therapeutics are expected to grow in the coming year, from ($0.43) to ($0.22) per share.Price to Earnings Ratio vs. the MarketThe P/E ratio of Aldeyra Therapeutics is -3.80, which means that its earnings are negative and its P/E ratio cannot be compared to companies with positive earnings.Price to Earnings Ratio vs. SectorThe P/E ratio of Aldeyra Therapeutics is -3.80, which means that its earnings are negative and its P/E ratio cannot be compared to companies with positive earnings.Price to Book Value per Share RatioAldeyra Therapeutics has a P/B Ratio of 2.50. P/B Ratios below 3 indicates that a company is reasonably valued with respect to its assets and liabilities.Read more about Aldeyra Therapeutics' valuation and earnings. Short Interest1.0 / 5Short Interest LevelBearish Percentage of Shares Shorted13.90% of the float of Aldeyra Therapeutics has been sold short.Short Interest Ratio / Days to CoverAldeyra Therapeutics has a short interest ratio ("days to cover") of 8.49.Change versus previous monthShort interest in Aldeyra Therapeutics has recently increased by 2.96%, indicating that investor sentiment is decreasing. Dividend0.0 / 5Dividend StrengthN/A Dividend YieldAldeyra Therapeutics does not currently pay a dividend.Dividend GrowthAldeyra Therapeutics does not have a long track record of dividend growth. News and Social Media3.2 / 5News Sentiment0.05 News SentimentAldeyra Therapeutics has a news sentiment score of 0.05. This score is calculated as an average of sentiment of articles about the company over the last seven days and ranges from 2 (good news) to -2 (bad news). This is a lower news sentiment than the 0.82 average news sentiment score of Medical companies.News Coverage This WeekMarketBeat has tracked 19 news articles for Aldeyra Therapeutics this week, compared to 6 articles on an average week.Search Interest9 people have searched for ALDX on MarketBeat in the last 30 days. This is an increase of 80% compared to the previous 30 days.MarketBeat Follows2 people have added Aldeyra Therapeutics to their MarketBeat watchlist in the last 30 days. Company Ownership4.6 / 5Insider TradingAcquiring Shares Cluster Insider Buying2 insiders have purchased shares of Aldeyra Therapeutics in the last three months. Multiple insiders buying is a strong bullish signal.Net Insider BuyingOver the last three months, insiders have purchased a net $105,100.00 in company stock, which represents 0.0996% of the company's market cap.Insider Buying vs. Insider SellingIn the past three months, Aldeyra Therapeutics insiders have bought more of their company's stock than they have sold. Specifically, they have bought $105,100.00 in company stock and sold $0.00 in company stock.Percentage Held by Insiders9.60% of the stock of Aldeyra Therapeutics is held by insiders.Percentage Held by Institutions59.71% of the stock of Aldeyra Therapeutics is held by institutions. High institutional ownership can be a signal of strong market trust in this company.Read more about Aldeyra Therapeutics' insider trading history. Receive ALDX Stock News and Ratings via Email Sign-up to receive the latest news and ratings for Aldeyra Therapeutics and its competitors with MarketBeat's FREE daily newsletter. 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ALDX Stock News HeadlinesALDX Investors Have Opportunity to Lead Aldeyra Therapeutics, Inc. Securities Fraud Lawsuit with the Schall Law FirmMay 29 at 9:57 AM | businesswire.comALDX FINAL DEADLINE ALERT: Faruqi & Faruqi, LLP Reminds Aldeyra Therapeutics (ALDX) Investors of Securities Class Action Deadline on May 29, 2026May 29 at 9:22 AM | businesswire.comGoldman Sachs just told you what to buy (most people missed it)Goldman Sachs just revealed that 40% of AI data centers will be crippled by electricity shortages by 2027 - not chips, not funding, but power. Demand is growing 15% per year and the grid can't keep up. One small company makes the exact equipment these data centers need. They're sitting on $1.5 billion in orders, their hardware is already inside Musk's Colossus, and the stock still trades like a name nobody's heard of. Analyst Dylan Jovine is releasing the ticker for free.May 29 at 1:00 AM | Behind the Markets (Ad)ALDX UPCOMING DEADLINE : The Gross Law Firm Alerts Aldeyra Therapeutics, Inc. Stockholders of Securities Class Action - Contact the FirmMay 29 at 9:00 AM | globenewswire.comALDX Deadline Tomorrow: ALDX Investors with Losses in Excess of $100K Have Opportunity to Lead Aldeyra Therapeutics, Inc. Securities Fraud Lawsuit Filed by The Rosen Law FirmMay 28 at 6:32 PM | prnewswire.comALDEYRA DEADLINE: ROSEN, THE FIRST FILING FIRM, Encourages Aldeyra Therapeutics, Inc. Investors with Losses in Excess of $100K to Secure Counsel Before Important May 29 Deadline in Securities Class Action First Filed by the Firm - ALDXMay 28 at 3:33 PM | globenewswire.comINVESTOR ALERT: Pomerantz Law Firm Reminds Investors with Losses on their Investment in Aldeyra Therapeutics, Inc. Of Class Action Lawsuit and Upcoming Deadlines - ALDXMay 28 at 10:00 AM | prnewswire.comALDX Investors Have Opportunity to Lead Aldeyra Therapeutics, Inc. Securities Fraud Lawsuit with the Schall Law FirmMay 28 at 9:54 AM | globenewswire.comSee More Headlines ALDX Stock Analysis - Frequently Asked Questions How have ALDX shares performed this year? Aldeyra Therapeutics' stock was trading at $5.18 at the start of the year. Since then, ALDX stock has decreased by 66.2% and is now trading at $1.75. How were Aldeyra Therapeutics' earnings last quarter? Aldeyra Therapeutics, Inc. (NASDAQ:ALDX) issued its quarterly earnings data on Thursday, May, 7th. The biotechnology company reported ($0.06) earnings per share for the quarter, topping analysts' consensus estimates of ($0.13) by $0.07. When did Aldeyra Therapeutics IPO? Aldeyra Therapeutics (ALDX) raised $16 million in an initial public offering (IPO) on Friday, April 11th 2014. The company issued 1,500,000 shares at a price of $10.00-$12.00 per share. Who are Aldeyra Therapeutics' major shareholders? Aldeyra Therapeutics' top institutional investors include Renaissance Technologies LLC (1.43%), Dimensional Fund Advisors LP (1.03%), Bank of America Corp DE (0.36%) and Bank of New York Mellon Corp (0.23%). Insiders that own company stock include Perceptive Advisors Llc, Todd C Brady, Stephen Machatha, Richard Douglas, Bruce Greenberg and Michael Alfieri. View institutional ownership trends. How do I buy shares of Aldeyra Therapeutics? Shares of ALDX stock can be purchased through any online brokerage account. Popular online brokerages with access to the U.S. stock market include Charles Schwab, E*TRADE, Fidelity, and Vanguard Brokerage Services. What other stocks do shareholders of Aldeyra Therapeutics own? Based on aggregate information from My MarketBeat watchlists, some other companies that Aldeyra Therapeutics investors own include NVIDIA (NVDA), Advanced Micro Devices (AMD), Meta Platforms (META), Tesla (TSLA), Viking Therapeutics (VKTX), Alibaba Group (BABA) and Netflix (NFLX). Company Calendar Last Earnings5/07/2026Today5/29/2026Next Earnings (Estimated)8/06/2026Fiscal Year End12/31/2026Get Stock Alerts Health Indicator TradeSmith's Health IndicatorA long-term volatility-based measure designed for securities held 12 months or longer.Green: Strong and healthy uptrend with normal pullbacks.Yellow: Significant pullback but still within expected volatility.Red: Dropped beyond expected volatility; considered unhealthy. Red Zone (2m+) 1-Year History May 25 Aug 25 Nov 25 Feb 26 May 26 ALDX's financial health is in the Red zone, according to TradeSmith. ALDX has been in this zone for over 2 months. Industry, Sector and Symbol Stock ExchangeNASDAQ SectorMedical Industry MED - DRUGS Sub-IndustryPharmaceutical Products Current SymbolNASDAQ:ALDX CIK1341235 Webwww.ampliphibio.com Phone781-761-4904Fax781-270-0630Employees10Year Founded2004Price Target and Rating Average Price Target for Aldeyra Therapeutics$5.50 High Price Target$9.00 Low Price Target$2.00 Potential Upside/Downside+214.3%Consensus RatingHold Rating Score (0-4)2.00 Research Coverage4 Analysts Profitability EPS (Trailing Twelve Months)($0.46) Trailing P/E RatioN/A Forward P/E RatioN/A P/E GrowthN/ANet Income-$33.85 million Net MarginsN/A Pretax MarginN/A Return on Equity-57.34% Return on Assets-36.33% Debt Debt-to-Equity RatioN/A Current Ratio2.72 Quick Ratio2.72 Sales & Book Value Annual SalesN/A Price / SalesN/A Cash FlowN/A Price / Cash FlowN/A Book Value$0.70 per share Price / Book2.50Miscellaneous Outstanding Shares60,320,000Free Float54,530,000Market Cap$105.56 million OptionableOptionable Beta1.16 Social Links A Guide To High-Short-Interest StocksMarketBeat's analysts have just released their top five short plays for June 2026. Learn which stocks have the most short interest and how to trade them. Click the link to see which companies made the list.Get This Free Report This page (NASDAQ:ALDX) was last updated on 5/29/2026 by MarketBeat.com Staff. From Our PartnersThe 1934 playbookIn 1934, a legal government maneuver transferred billions in wealth overnight. 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