AC ImmuneACIU -10.53%25 PEG Ratio is 0.00 as of Jun. 30, 2026. GuruFocus rates ACIU with a GF Score™ of 25/100 and a GF Value™ of $0.75 (Significantly Overvalued). The stock has 6 warning signs investors should review. Among 95 Biotechnology companies, AC Immune ranks worse than 1052630.53% on this metric.
PE Ratio without NRI / 5-Year EBITDA Growth Rate*
PEG Ratio is defined as the PE Ratio without NRI divided by the growth ratio. The growth rate we use is the 5-Year EBITDA growth rate. As of today, AC Immune's PE Ratio without NRI is 0.00. AC Immune's 5-Year EBITDA growth rate is 7.10%. Therefore, AC Immune's PEG Ratio for today is 0.00.
* 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 AC Immune's PEG Ratio or its related term are showing as below:
ACIU's PEG Ratio is not ranked *
in the Biotechnology industry.
Industry Median: 1.98 * 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.
AC Immune (NAS:ACIU) 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.
AC Immune PEG Ratio Related Terms
AC Immune PEG Ratio Historical Data
* Premium members only.
The historical data trend for AC Immune'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, AC Immune'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.
AC Immune PEG Ratio vs Biotechnology Industry
For the Biotechnology industry and Healthcare sector, AC Immune's PEG Ratio distribution charts can be found below:
* The bar in red indicates where AC Immune'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.
AC Immune (ACIU) has a PEG Ratio of 0.00 as of Jun. 30, 2026. Price-earnings to growth ratio is the ratio of price-earnings to a company's earnings growth rate. View historical data on AC Immune and its competitors. According to the industry distribution chart, AC Immune ranks #999999 out of 95 companies in the Biotechnology industry.
Is AC Immune's PEG Ratio too high?
AC Immune's current PEG Ratio is 0.00. Based on the distribution chart, AC Immune ranks #999999 out of 95 companies in the Biotechnology industry, which is in the bottom quartile relative to peers. Overall, AC Immune has a GF Score™ of 25/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does AC Immune's PEG Ratio compare to NAUT and IVVD?
According to the Biotechnology industry distribution chart, AC Immune ranks #999999 out of 95 companies for PEG Ratio. This places AC Immune in the lower half of its industry. The industry median PEG Ratio is 1.98. 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 1.98, 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 AC Immune and its competitors. For the Biotechnology industry, the median PEG Ratio is 1.98 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. AC Immune'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 AC Immune stock overvalued right now?
Based on GuruFocus' analysis, AC Immune (ACIU) is currently considered Significantly Overvalued. The stock's GF Value™ is $0.75, compared to a current price of $2.38 — trading 217.3% above its estimated fair value. The current PEG Ratio is 0.00. AC Immune's overall GF Score™ is 25/100 with 6 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 AC Immune (ACIU), the current PEG Ratio is 0.00 as of Jun. 30, 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.
Is AC Immune (ACIU) Overvalued in 2026?
Based on GuruFocus' analysis, AC Immune stock appears to be overvalued.
The current stock price of $2.38 is trading 217.3% above its estimated GF Value™ of $0.75.
GuruFocus considers AC Immune to be Significantly Overvalued.
Key valuation signals for ACIU:
PEG Ratio: 0.00
GF Value™: $0.75 vs. price of $2.38 (217.3% above fair value)
No single metric tells the full story. See the ACIU stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
AC Immune SA is a clinical stage biopharmaceutical company advancing a portfolio of programs strategically focused on pioneering Precision Medicine for neurodegenerative diseases. The company uses its proprietary technology platforms to discover, design, and develop novel proprietary small molecules, antibodies, and vaccines for the prevention, diagnosis, and treatment of neurodegenerative diseases associated with protein misfolding. The company has one segment. The company currently focuses mostly of its resources on discovering and developing therapeutic and diagnostic products targeting misfolded proteins. The company's pipeline consists of ACI-24.060, Crenezumab, ACI-35.030, Semorinemab, ACI-7104.056, and others.
25GF Score
Get the complete analysis for ACIU
PEG Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
ACIU has been successfully added to your 
