Aldeyra Therapeutics, Inc. (ALDX)

NASDAQ

$0.71

$-0.02

(-2.30%)

Regular Market

Aldeyra Therapeutics, Inc. (ALDX) Live Price Chart

Last updated: ⁦2026-10-21 16:24:40⁩. Prices reflect the latest regular market data. Stock price data is sourced from Massive.

Summary

Aldeyra Therapeutics, Inc. (ALDX) operates in the PHARMACEUTICAL PREPARATIONS sector and is listed on NASDAQ. The stock is currently priced at $0.71, with a market capitalization of $40.12M and a P/E ratio of --. Over the past 52 weeks, its price has ranged from $0.65 to $5.93. This page covers its latest market performance, valuation, price trends and company information.

Key Market Data

Market Cap	$40.12M
Open	$0.74
Day's High	$16.70
Day's Low	$0.65
Previous Close	$0.73
Volume	188.46K
Average Volume	1.18M
P/E Ratio	--
52-Week High	$5.93
52-Week Low	$0.65
Dividend Yield	--
Earnings Date	--

Aldeyra Therapeutics, Inc. (ALDX) Stock Price Today

Aldeyra Therapeutics, Inc. (ALDX) is currently trading at $0.71 as of 2026-10-21 16:23:00, down 3.72% ($0.03) from the previous close of $0.73

During today's regular trading session, ALDX has traded between $0.65 and $16.70, with a trading volume of 188.46K shares. The current price is near the lower end of today's range.

Aldeyra Therapeutics, Inc. (ALDX) 7-Day Stock Price Change

Over the past seven days, Aldeyra Therapeutics, Inc. (ALDX) moved from $0.91 to $0.71, representing a decline of 21.95% ($0.20).

The stock traded between $0.65 and $0.94 during the period. The latest price is near the lower end of the 7-day range, indicating strong downward.

The average daily volume was 1.42 million shares, down versus the previous seven-day period, indicating lower trading activity.

ALDX 52-Week Price Position

Position in Range: 1.1%

52W Low$0.65

52W High$5.93

ALDX is currently trading at $0.71, placing it 1.1% of the way from its 52-week low of $0.65 to its 52-week high of $5.93. This percentage reflects the stock's relative position within its 52-week trading range, not its valuation or future performance.

What is Aldeyra Therapeutics, Inc. (ALDX)?

Aldeyra Therapeutics Inc is a biotechnology company engaged in developing and commercializing next-generation medicines to improve the lives of patients with immune-mediated and metabolic diseases. The company's product candidate, Reproxalap, is a treatment in late-stage development for dry eye disease and allergic conjunctivitis. In addition, it also has additional product candidates in development for proliferative vitreoretinopathy, primary vitreoretinal lymphoma, and other retinal diseases, autoimmune disease, and cancer. Company products includes ADX248, ADX743, ADX631, ADX246, ADX629, ADX2191.

Aldeyra Therapeutics, Inc. Information

Industry	PHARMACEUTICAL PREPARATIONS
Employees	6
Exchange	NASDAQ
Company Website	https://www.aldeyra.com

How to Buy Aldeyra Therapeutics, Inc. (ALDX) Stock on MEXC

Eligible investors can buy real shares of Aldeyra Therapeutics, Inc. (ALDX) through MEXC RealStocks. Follow these three steps to open a RealStocks account, transfer USDT, and place a US stock order.

Step 1: Open and Verify Your RealStocks Account

Log in to the MEXC App, go to Trade → RealStocks, and select Open Account. Complete the required account-opening and identity verification process with MEXC's partner licensed broker.

Step 2: Transfer USDT to Your RealStocks Account

Go to Wallets → RealStocks and transfer USDT from your Spot Account to your RealStocks Account. RealStocks are quoted in USD, while account funding can be completed using USDT.

Step 3: Search for ALDX and Place Your Order

Open the RealStocks trading page and search for ALDX. Select a market or limit order, enter the price and quantity as required, review the order details, and submit your order. Once filled, the corresponding real shares will be held in your RealStocks Account.

Frequently Asked Questions (FAQ)

1.What is Aldeyra Therapeutics, Inc. (ALDX) stock price today?

Aldeyra Therapeutics, Inc. (ALDX) is currently trading at $ 0.71, down 3.72% ($0.03) from the previous close of $ 0.73. Intraday prices update in real time during regular trading hours.

2.Is ALDX stock going up or down today?

As of 2026-10-21 16:23:00, ALDX is trading at $ 0.71, down 3.72% ($0.03) from its previous close of $ 0.73. The stock has traded between $ 0.65 and $ 16.70 during today’s regular session. Past price movements do not guarantee future results.

3.What is ALDX pre-market price?

As of 2026-10-21 16:23:00, ALDX is trading at $ 0.74 in pre-market trading, up 0.50% ($0.00) from the previous close of $ 0.73. Pre-market prices reflect trading activity before the regular session opens and may experience lower liquidity and higher volatility.

4.What is ALDX after-hours price?

As of 2026-10-21 16:23:00, ALDX is trading at $ 0.73 in after-hours trading, down 0.04% ($0.00) from the regular-session close of $ 0.73. After-hours prices may differ from the regular session’s opening price due to lower liquidity and wider bid-ask spreads.

5.Is ALDX stock trading now?

ALDX trades on the NASDAQ exchange during regular hours, Monday through Friday, 9:30 AM to 4:00 PM ET, excluding public holidays. Pre-market and after-hours trading are also available through select brokers outside these hours.

6.Where does ALDX sit relative to its 52-week high and low?

Over the past 52 weeks, ALDX has traded between a low of $ 0.65 and a high of $ 5.93. At $ 0.71, the stock is positioned 1.1% of the way from its 52-week low to its 52-week high, providing context for its current price within the one-year trading range.

7.What sector is Aldeyra Therapeutics, Inc. in?

Aldeyra Therapeutics, Inc. (ALDX) operates in the PHARMACEUTICAL PREPARATIONS sector. Sector classification helps investors compare it with companies exposed to similar market trends and competitive conditions.

8.What is Aldeyra Therapeutics, Inc.'s market capitalization and where is it listed?

Aldeyra Therapeutics, Inc. is listed on the NASDAQ exchange with a market capitalization of $ 40.12M. Market cap reflects the total market value of all outstanding shares and is commonly used to classify stocks by size.

9.How is ALDX valued in terms of P/E ratio and EPS?

ALDX trades at a P/E ratio of --, based on trailing-twelve-month EPS of $ -0.38. P/E ratio compares the stock price to earnings per share and is a common starting point for assessing valuation relative to peers.

10.Does Aldeyra Therapeutics, Inc. pay a dividend?

Aldeyra Therapeutics, Inc. pays an indicated annual cash dividend of $ 0.00 per share, with a current dividend yield of 0.00% based on the latest share price. Dividend policies are subject to change at the board's discretion.