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Century Aluminum CoSTU:EY3 +0.12%66 PB Ratio is 4.03 as of Jul. 25, 2026, which is 104% above its 10-year median of 1.98. GuruFocus rates STU:EY3 with a GF Score™ of 66/100 and a GF Value™ of €19.46 (Significantly Overvalued). The stock has 6 warning signs investors should review. Among 2,354 Metals & Mining companies, Century Aluminum Co ranks worse than 71.28% on this metric.
The historical rank and industry rank for Century Aluminum Co's PB Ratio or its related term are showing as below:
STU:EY3'
s PB Ratio Range Over the Past 10 Years
Min: 0.4 Med: 1.98 Max: 6.72
Current: 3.97
During the past 13 years, Century Aluminum Co's highest PB Ratio was 6.72. The lowest was 0.40. And the median was 1.98.
STU:EY3's PB Ratio is ranked worse than 71.28% of 2354
companies
in the Metals & Mining industry
Industry Median: 2.15
vs STU:EY3: 3.97
During the past 12 months, Century Aluminum Co's average Book Value Per Share Growth Rate was 49.40% per year.
During the past 3 years, the average Book Value Per Share Growth Rate was 23.50% per year.
During the past 5 years, the average Book Value Per Share Growth Rate was 8.30% per year.
During the past 10 years, the average Book Value Per Share Growth Rate was -6.10% per year.
During the past 13 years, the highest 3-Year average Book Value Per Share Growth Rate of Century Aluminum Co was 42.40% per year. The lowest was -19.60% per year. And the median was -3.10% per year.
Back to Basics: PB Ratio
Century Aluminum Co (STU:EY3) PB Ratio Explanation
The PB Ratio works the best for the businesses that earn most of their profit from their assets, e.g. banks and insurance companies.
Be Aware
Some businesses have very light assets, such as software companies or insurance agencies. The PB Ratio does not work well for these companies. Some companies even have negative equity, so the PB Ratio cannot be applied to them.
Century Aluminum Co PB Ratio Related Terms
Century Aluminum Co PB Ratio Historical Data
* Premium members only.
The historical data trend for Century Aluminum Co's PB 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 Aluminum subindustry, Century Aluminum Co's PB Ratio, along with its competitors' market caps and PB 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.
Century Aluminum Co PB Ratio vs Metals & Mining Industry
For the Metals & Mining industry and Basic Materials sector, Century Aluminum Co's PB Ratio distribution charts can be found below:
* The bar in red indicates where Century Aluminum Co's PB Ratio falls into.
The PB Ratio, or Price-to-Book ratio, or Price/Book, is a financial ratio used to compare a company's market price to its Book Value per Share. It is a ratio widely used to value stocks.
* 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.
It can also be calculated from the numbers for the whole company:
A closely related ratio is called Price-to-Tangible-Book. The difference between Price-to-Tangible-Book and PB Ratio is that book value other than intangibles are used in the calculation.
Century Aluminum Co (STU:EY3) has a PB Ratio of 4.03 as of Jul. 25, 2026. Price-to-Book ratio is the ratio of share price to a company's book value per share. View historical data on Century Aluminum Co and its competitors. This is 104% above median its historical median of 1.98. Over the past decade, Century Aluminum Co's PB Ratio has ranged from 0.40 to 6.72. According to the industry distribution chart, Century Aluminum Co ranks #1678 out of 2354 companies in the Metals & Mining industry, placing it in the top 71.3%.
Is Century Aluminum Co's PB Ratio too high?
Century Aluminum Co's current PB Ratio of 4.03 is 104% above median its 10-year median of 1.98. Over the past 10 years, this metric has ranged from a low of 0.40 to a high of 6.72. The Metals & Mining industry median PB Ratio is 2.15. Century Aluminum Co's value of 4.03 is 87.4% above this industry median. Based on the distribution chart, Century Aluminum Co ranks #1678 out of 2354 companies in the Metals & Mining industry, which is below the industry midpoint. Overall, Century Aluminum Co has a GF Score™ of 66/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Century Aluminum Co's PB Ratio compare to CSTM and KALU?
According to the Metals & Mining industry distribution chart, Century Aluminum Co ranks #1678 out of 2354 companies for PB Ratio. This places Century Aluminum Co in the lower half of its industry. The industry median PB Ratio is 2.15. Century Aluminum Co's value of 4.03 is 87.4% above this benchmark. Historically, Century Aluminum Co's own PB Ratio has ranged from 0.40 to 6.72 over the past decade. While the company's 10-year median is 1.98 vs. the industry median of 2.15, Century Aluminum Co has consistently been above the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good PB Ratio for a Metals & Mining company?
The median PB Ratio among Metals & Mining companies is 2.15, based on 2,354 companies in the industry. Companies in the top quartile (top 25%) have a PB Ratio significantly above this median, while those in the bottom quartile fall well below. However, PB Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Century Aluminum Co's current PB Ratio of 4.03 is 87.4% above the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high PB Ratio mean?
A high PB Ratio can signal that a stock is expensive relative to its fundamentals. Price-to-Book ratio is the ratio of share price to a company's book value per share. View historical data on Century Aluminum Co and its competitors. For the Metals & Mining industry, the median PB Ratio is 2.15 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Century Aluminum Co's current PB Ratio is 4.03, which is 104% above median its own 10-year median of 1.98. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Century Aluminum Co stock overvalued right now?
Based on GuruFocus' analysis, Century Aluminum Co (STU:EY3) is currently considered Significantly Overvalued. The stock's GF Value™ is €19.46, compared to a current price of €40.50 — trading 108.1% above its estimated fair value. The current PB Ratio is 4.03, which is 104% above median its 10-year median of 1.98 and 87.4% above the Metals & Mining industry median of 2.15. Century Aluminum Co's overall GF Score™ is 66/100 with 6 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is PB Ratio calculated?
PB Ratio is calculated from a company's financial statements. For Century Aluminum Co (STU:EY3), the current PB Ratio is 4.03 as of Jul. 25, 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 Century Aluminum Co (STU:EY3) Overvalued in 2026?
Based on GuruFocus' analysis, Century Aluminum Co stock appears to be overvalued.
The current stock price of €40.50 is trading 108.1% above its estimated GF Value™ of €19.46.
GuruFocus considers Century Aluminum Co to be Significantly Overvalued.
Key valuation signals for STU:EY3:
PB Ratio: 4.03 (104% above median its 10-year median of 1.98)
GF Value™: €19.46 vs. price of €40.50 (108.1% above fair value)
Industry Position: 87.4% above the Metals & Mining median (#1678 of 2354)
No single metric tells the full story. See the STU:EY3 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Century Aluminum Co produces primary aluminum standard grade and value-added products. The firm operates smelter facilities in the United States and Iceland. The majority of revenue is generated from Glencore, which agreed to purchase nearly all of Century Aluminum's North American production. The company produces high purity aluminum, standard-grade aluminum sow and tee bars, and value-added billet and foundry products. The company also owns a carbon anode production facility in the Netherlands.
66GF Score
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