Castellum ABOSTO:CAST +0.36%66 PB Ratio is 0.77 as of Jun. 27, 2026, which is 29% below its 10-year median of 1.08. GuruFocus rates OSTO:CAST with a GF Score™ of 66/100 and a GF Value™ of kr113.16 (Modestly Overvalued). The stock has 3 warning signs investors should review. Among 1,712 Real Estate companies, Castellum AB ranks better than 52.8% on this metric.
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. As of today (2026-06-27), Castellum AB's share price is kr125.95. Castellum AB's Book Value per Share for the quarter that ended in Mar. 2026 was kr164.20. Hence, Castellum AB's PB Ratio of today is 0.77.
The historical rank and industry rank for Castellum AB's PB Ratio or its related term are showing as below:
OSTO:CAST'
s PB Ratio Range Over the Past 10 Years
Min: 0.46 Med: 1.08 Max: 1.58
Current: 0.77
During the past 13 years, Castellum AB's highest PB Ratio was 1.58. The lowest was 0.46. And the median was 1.08.
OSTO:CAST's PB Ratio is ranked better than 52.8% of 1712
companies
in the Real Estate industry
Industry Median: 0.82
vs OSTO:CAST: 0.77
During the past 12 months, Castellum AB's average Book Value Per Share Growth Rate was 2.50% per year.
During the past 3 years, the average Book Value Per Share Growth Rate was -7.60% per year.
During the past 5 years, the average Book Value Per Share Growth Rate was -1.60% per year.
During the past 10 years, the average Book Value Per Share Growth Rate was 8.50% per year.
During the past 13 years, the highest 3-Year average Book Value Per Share Growth Rate of Castellum AB was 29.50% per year. The lowest was -7.70% per year. And the median was 9.30% per year.
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.
Castellum AB PB Ratio Related Terms
Castellum AB PB Ratio Historical Data
* Premium members only.
The historical data trend for Castellum AB'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 Real Estate - Development subindustry, Castellum AB'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.
Castellum AB PB Ratio vs Real Estate Industry
For the Real Estate industry and Real Estate sector, Castellum AB's PB Ratio distribution charts can be found below:
* The bar in red indicates where Castellum AB'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.
Castellum AB's PB Ratio for today is calculated as follows:
* 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.
Castellum AB (OSTO:CAST) has a PB Ratio of 0.77 as of Jun. 27, 2026. Price-to-Book ratio is the ratio of share price to a company's book value per share. View historical data on Castellum AB and its competitors. This is 29% below median its historical median of 1.08. Over the past decade, Castellum AB's PB Ratio has ranged from 0.46 to 1.58. According to the industry distribution chart, Castellum AB ranks #808 out of 1712 companies in the Real Estate industry, placing it in the top 47.2%.
Is Castellum AB's PB Ratio too high?
Castellum AB's current PB Ratio of 0.77 is 29% below median its 10-year median of 1.08. Over the past 10 years, this metric has ranged from a low of 0.46 to a high of 1.58. The Real Estate industry median PB Ratio is 0.82. Castellum AB's value of 0.77 is 6.1% below this industry median. Based on the distribution chart, Castellum AB ranks #808 out of 1712 companies in the Real Estate industry, which is above the industry midpoint. Overall, Castellum AB has a GF Score™ of 66/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Castellum AB's PB Ratio compare to competitors?
According to the Real Estate industry distribution chart, Castellum AB ranks #808 out of 1712 companies for PB Ratio. This puts Castellum AB in the upper half of its industry. The industry median PB Ratio is 0.82. Castellum AB's value of 0.77 is 6.1% below this benchmark. Historically, Castellum AB's own PB Ratio has ranged from 0.46 to 1.58 over the past decade. While the company's 10-year median is 1.08 vs. the industry median of 0.82, Castellum AB has consistently been below 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 Real Estate company?
The median PB Ratio among Real Estate companies is 0.82, based on 1,712 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. Castellum AB's current PB Ratio of 0.77 is 6.1% below 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 Castellum AB and its competitors. For the Real Estate industry, the median PB Ratio is 0.82 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Castellum AB's current PB Ratio is 0.77, which is 29% below median its own 10-year median of 1.08. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Castellum AB stock overvalued right now?
Based on GuruFocus' analysis, Castellum AB (OSTO:CAST) is currently considered Modestly Overvalued. The stock's GF Value™ is kr113.16, compared to a current price of kr125.95 — trading 11.3% above its estimated fair value. The current PB Ratio is 0.77, which is 29% below median its 10-year median of 1.08 and 6.1% below the Real Estate industry median of 0.82. Castellum AB's overall GF Score™ is 66/100 with 3 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 Castellum AB (OSTO:CAST), the current PB Ratio is 0.77 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.
Is Castellum AB (OSTO:CAST) Overvalued in 2026?
Based on GuruFocus' analysis, Castellum AB stock appears to be overvalued.
The current stock price of kr125.95 is trading 11.3% above its estimated GF Value™ of kr113.16.
GuruFocus considers Castellum AB to be Modestly Overvalued.
Key valuation signals for OSTO:CAST:
PB Ratio: 0.77 (29% below median its 10-year median of 1.08)
GF Value™: kr113.16 vs. price of kr125.95 (11.3% above fair value)
Industry Position: 6.1% below the Real Estate median (#808 of 1712)
No single metric tells the full story. See the OSTO:CAST stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Castellum AB is a Swedish property company that owns, manages, and develops commercial properties in growth cities. The Company holds properties mainly in Sweden, with additional presence in Denmark and Finland. Its operating segments are organized by geographical areas: Stockholm; West (Greater Gothenburg, including Boras); Central (Orebro, Linkoping, Norrkoping, Jonkoping, and Vaxjo); Malardalen (Uppsala and Vasteras); Oresund (Malmo, Lund, Helsingborg, and Copenhagen); and Finland.
66GF Score
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