Aldeyra TherapeuticsALDX +1.95%29 PEG Ratio is 0.00 as of Jun. 27, 2026. GuruFocus rates ALDX with a GF Score™ of 29/100. The stock has 2 warning signs investors should review. Among 95 Biotechnology companies, Aldeyra Therapeutics ranks worse than 1052630.53% on this metric.
* The 5-Year EBITDA Growth Rate is the 5-year average EBITDA per share growth rate. While the denominator is a percentage, we use the whole number as opposed to the decimal form for the calculation. For example, 5% would be shown as 5 as opposed to 0.05. If it's smaller than or equal to 0, then the PEG Ratio is not calculated.
The historical rank and industry rank for Aldeyra Therapeutics's PEG Ratio or its related term are showing as below:
ALDX's PEG Ratio is not ranked *
in the Biotechnology industry.
Industry Median: 1.92 * Ranked among companies with meaningful PEG Ratio only.
Peter Lynch thinks a company with a P/E ratio equal to its growth rate is fairly valued.
Aldeyra Therapeutics (NAS:ALDX) PEG Ratio Explanation
To compare stocks with different growth rates, Peter Lynch invented a ratio called PEG Ratio. PEG Ratio is defined as the P/E ratio divided by the growth ratio. He thinks a company with a P/E ratio equal to its growth rate is fairly valued. Still he said he would rather buy a company growing 20% a year with a P/E of 20, instead of a company growing 10% a year with a P/E of 10.
Aldeyra Therapeutics PEG Ratio Related Terms
Aldeyra Therapeutics PEG Ratio Historical Data
* Premium members only.
The historical data trend for Aldeyra Therapeutics's PEG Ratio can be seen below:
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
For the Biotechnology subindustry, Aldeyra Therapeutics's PEG Ratio, along with its competitors' market caps and PEG Ratio data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Aldeyra Therapeutics PEG Ratio vs Biotechnology Industry
For the Biotechnology industry and Healthcare sector, Aldeyra Therapeutics's PEG Ratio distribution charts can be found below:
* The bar in red indicates where Aldeyra Therapeutics's PEG Ratio falls into.
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
* Note: The 5-Year EBITDA Growth Rate is the 5-year average EBITDA per share growth rate. While the denominator is a percentage, we use the whole number as opposed to the decimal form for the calculation. For example, 5% would be shown as 5 as opposed to 0.05. If it's smaller than or equal to 0, then the PEG Ratio is not calculated.
Aldeyra Therapeutics (ALDX) has a PEG Ratio of 0.00 as of Jun. 27, 2026. Price-earnings to growth ratio is the ratio of price-earnings to a company's earnings growth rate. View historical data on Aldeyra Therapeutics and its competitors. According to the industry distribution chart, Aldeyra Therapeutics ranks #999999 out of 95 companies in the Biotechnology industry.
Is Aldeyra Therapeutics' PEG Ratio too high?
Aldeyra Therapeutics' current PEG Ratio is 0.00. Based on the distribution chart, Aldeyra Therapeutics ranks #999999 out of 95 companies in the Biotechnology industry, which is in the bottom quartile relative to peers. Overall, Aldeyra Therapeutics has a GF Score™ of 29/100, reflecting its overall financial health beyond just this single metric.
How does Aldeyra Therapeutics' PEG Ratio compare to CGTX and RANI?
According to the Biotechnology industry distribution chart, Aldeyra Therapeutics ranks #999999 out of 95 companies for PEG Ratio. This places Aldeyra Therapeutics in the lower half of its industry. The industry median PEG Ratio is 1.92. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good PEG Ratio for a Biotechnology company?
The median PEG Ratio among Biotechnology companies is 1.92, based on 95 companies in the industry. Companies in the top quartile (top 25%) have a PEG Ratio significantly above this median, while those in the bottom quartile fall well below. However, PEG Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high PEG Ratio mean?
A high PEG Ratio can signal that a stock is expensive relative to its fundamentals. Price-earnings to growth ratio is the ratio of price-earnings to a company's earnings growth rate. View historical data on Aldeyra Therapeutics and its competitors. For the Biotechnology industry, the median PEG Ratio is 1.92 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Aldeyra Therapeutics's current PEG Ratio is 0.00. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Aldeyra Therapeutics stock overvalued right now?
Aldeyra Therapeutics (ALDX) has a current PEG Ratio of 0.00. The current PEG Ratio is 0.00. Aldeyra Therapeutics' overall GF Score™ is 29/100 with 2 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is PEG Ratio calculated?
PEG Ratio is calculated from a company's financial statements. For Aldeyra Therapeutics (ALDX), the current PEG Ratio is 0.00 as of Jun. 27, 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
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.
29GF Score
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