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Graham Number is a figure that measures a stock's fundamental value by taking into account the company's earnings per share and book value per share. The Graham number is the upper bound of the price range that a defensive investor should pay for the stock. According to the theory, any stock price below the Graham number is considered undervalued, and thus worth investing in.
As of today (2026-07-22), the stock price of Rockwool AS is $34.70. Rockwool AS's graham number for the quarter that ended in Mar. 2026 was $N/A. Therefore, Rockwool AS's Price to Graham Number ratio for today is N/A.
The historical rank and industry rank for Rockwool AS's Graham Number or its related term are showing as below:
During the past 13 years, the highest Price to Graham Number ratio of Rockwool AS was 5.74. The lowest was 0.96. And the median was 1.47.
RKWAF's Price-to-Graham-Number is not ranked *
in the Construction industry.
Industry Median: 1 * Ranked among companies with meaningful Price-to-Graham-Number only.
Graham Number is a combination of asset valuation and earnings power valuation. It is a very conservative way of valuing a stock.
Rockwool AS (OTCPK:RKWAF) Graham Number Explanation
Ben Graham actually did not publish a formula like this. But he wrote in The Intelligent Investor (1948 version) regarding to the criteria for purchases:
Current price should not be more than 15 times average earnings of the past three years.
Current price should not be more than 1.5 times the book value last reported. However, a multiplier of earnings below 15 could justify a correspondingly higher multiplier of assets. As a rule of thumb we suggest that the product of the multiplier times the ratio of price to book value should not exceed 22.5. (This figure corresponds to 15 times earnings and 1.5 times book value. It would admit an issue selling at only 9 times earnings and 2.5 times asset value, etc.)
Unlike valuation methods such as DCF or Discounted Earnings, the Graham number does not take growth into the valuation. Unlike the valuation methods based on book value alone, it takes into account the earnings power. Therefore, the Graham Number is a combination of asset valuation and earnings power valuation.
In general, the Graham number is a very conservative way of valuing a stock. It cannot be applied to companies with negative book values.
Rockwool AS's Price to Graham number Ratio for today is calculated as
Price to Graham number
=
Share Price (Today)
/
Graham number (Q: Mar. 2026 )
=
34.70
/
N/A
=
N/A
* 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.
Be Aware
Please keep these in mind:
1. Graham Number does not take growth into account. Therefore it underestimates the values of the companies that have good earnings growth. We feel that if the earnings per share grows more than 10% a year, Graham Number underestimates the value.
2. Graham Number punishes the companies that have temporarily low earnings. Therefore, an average of earnings makes more sense in the calculation of Graham Number.
3. Graham Numbers underestimates companies that are light with book.
Rockwool AS Graham Number Related Terms
Rockwool AS Graham Number Historical Data
* Premium members only.
The historical data trend for Rockwool AS's Graham Number 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 Building Products & Equipment subindustry, Rockwool AS's Price-to-Graham-Number, along with its competitors' market caps and Price-to-Graham-Number 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.
Rockwool AS Price-to-Graham-Number vs Construction Industry
For the Construction industry and Industrials sector, Rockwool AS's Price-to-Graham-Number distribution charts can be found below:
* The bar in red indicates where Rockwool AS's Price-to-Graham-Number 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.
Rockwool AS (RKWAF) has a Graham Number of $N/A as of Mar. 2026. The Graham Number values a company based on its per-share earnings and book value. View historical data on Rockwool AS and its competitors. Over the past decade, Rockwool AS's Graham Number has ranged from 0.96 to 5.74. According to the industry distribution chart, Rockwool AS ranks #999999 out of 1216 companies in the Construction industry.
Is Rockwool AS's Graham Number too high?
Rockwool AS's current Graham Number is $N/A. Over the past 10 years, this metric has ranged from a low of 0.96 to a high of 5.74. Based on the distribution chart, Rockwool AS ranks #999999 out of 1216 companies in the Construction industry, which is in the bottom quartile relative to peers. Overall, Rockwool AS has a GF Score™ of 94/100, reflecting its overall financial health beyond just this single metric.
How does Rockwool AS's Graham Number compare to TT and JCI?
According to the Construction industry distribution chart, Rockwool AS ranks #999999 out of 1216 companies for Graham Number. This places Rockwool AS in the lower half of its industry. The industry median Graham Number is 1.00. Historically, Rockwool AS's own Graham Number has ranged from 0.96 to 5.74 over the past decade. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Graham Number for a Construction company?
The median Graham Number among Construction companies is 1.00, based on 1,216 companies in the industry. Companies in the top quartile (top 25%) have a Graham Number significantly above this median, while those in the bottom quartile fall well below. However, Graham Number 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 Graham Number mean?
A high Graham Number can signal that a stock is expensive relative to its fundamentals. The Graham Number values a company based on its per-share earnings and book value. View historical data on Rockwool AS and its competitors. For the Construction industry, the median Graham Number is 1.00 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Rockwool AS's current Graham Number is $N/A. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Rockwool AS stock overvalued right now?
Rockwool AS (RKWAF) has a current Graham Number of $N/A. The stock's GF Value™ is $39.50, compared to a current price of $34.70 — trading 12.2% below its estimated fair value. The current Graham Number is $N/A. Rockwool AS's overall GF Score™ is 94/100 with 1 warning sign to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Graham Number calculated?
Graham Number is calculated from a company's financial statements. For Rockwool AS (RKWAF), the current Graham Number is $N/A as of Mar. 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 Rockwool AS (RKWAF) Overvalued in 2026?
Based on GuruFocus' analysis, Rockwool AS stock appears to be undervalued.
The current stock price of $34.70 is trading 12.2% below its estimated GF Value™ of $39.50.
Key valuation signals for RKWAF:
Graham Number: $N/A
GF Value™: $39.50 vs. price of $34.70 (12.2% below fair value)
No single metric tells the full story. See the RKWAF stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Rockwool AS manufactures and sells building materials, including insulation and roofing systems. The company organizes itself into two segments based on the product: Insulation and Systems. The Insulation segment, sells building, industrial, and technical insulation and external thermal insulation wall systems to the construction industry. The Systems business sells acoustic ceilings and wall systems, external cladding systems, horticultural substrate solutions, engineered fiber solutions, and noise and vibration control to the construction and automotive industries. The majority of revenue is from the Insulation Segment. The majority of sales come from Europe.
94GF Score
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