Builders FirstSource (MIL:1BLDR) Cyclically Adjusted Book per Share: €19.62 (As of Mar. 2026)

Author: Vera Yuan Vera Yuan
Vera Yuan
Vera Yuan
Director of Data and Quant Analytics at GuruFocus
Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
Reviewed by: Charlie Tian Charlie Tian
Charlie Tian
Charlie Tian
Founder & CEO of GuruFocus
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.

MIL:1BLDR Builders FirstSource Inc MIL:1BLDR
57 GF Score
Price €68.70
GF Value €114.97
Valuation Significantly Undervalued
! 7 Warning Signs
View Full Analysis

What is Builders FirstSource Cyclically Adjusted Book per Share?

Builders FirstSource MIL:1BLDR 57 Cyclically Adjusted Book per Share is €19.62 as of Mar. 2026. GuruFocus rates MIL:1BLDR with a GF Score™ of 57/100 and a GF Value™ of €114.97 (Significantly Undervalued). The stock has 7 warning signs investors should review.

E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted Book per Share and the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted Book Value per Share of a company over the past 10 years.

Builders FirstSource's adjusted book value per share for the three months ended in Mar. 2026 was €32.215. Add all the adjusted book value per share for the past 10 years together and divide the count will get our Cyclically Adjusted Book per Share, which is €19.62 for the trailing ten years ended in Mar. 2026.

During the past 12 months, Builders FirstSource's average Cyclically Adjusted Book Growth Rate was 23.40% per year. During the past 3 years, the average Cyclically Adjusted Book Growth Rate was 32.90% per year. During the past 5 years, the average Cyclically Adjusted Book Growth Rate was 48.50% per year. During the past 10 years, the average Cyclically Adjusted Book Growth Rate was 30.30% per year. Please click Growth Rate Calculation Example (GuruFocus) to see how GuruFocus calculates Wal-Mart Stores Inc (WMT)'s revenue growth rate. You can apply the same method to get the Cyclically Adjusted Book Growth Rate using Cyclically Adjusted Book per Share data.

During the past 13 years, the highest 3-Year average Cyclically Adjusted Book Growth Rate of Builders FirstSource was 66.20% per year. The lowest was -15.30% per year. And the median was 32.90% per year.

As of today (2026-07-14), Builders FirstSource's current stock price is €68.70. Builders FirstSource's Cyclically Adjusted Book per Share for the quarter that ended in Mar. 2026 was €19.62. Builders FirstSource's Cyclically Adjusted PB Ratio of today is 3.50.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Builders FirstSource was 16.77. The lowest was 3.07. And the median was 9.45.


Builders FirstSource  (MIL:1BLDR) Cyclically Adjusted Book per Share Explanation

If a company grows much fast than inflation, Cyclically Adjusted Book per Share may underestimate the company's equity. Cyclically Adjusted PB Ratio can seem to be too high even the actual PB Ratio is low.

For the Cyclically Adjusted PB Ratio, the book value of the past 10 years are inflation-adjusted and averaged. The result is used for P/B calculation. Since it looks at the average over the last 10 years, the Cyclically Adjusted PB Ratio is also called CAPB Ratio.

The Shiller PE Ratio was first used by professor Robert Shiller. He uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings per share of a company over the past 10 years. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted book value per share of a company over the past 10 years.

Builders FirstSource's Cyclically Adjusted PB Ratio of today is calculated as

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=68.70/19.62
=3.50

* 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.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Builders FirstSource was 16.77. The lowest was 3.07. And the median was 9.45.


Be Aware

Cyclically Adjusted PB Ratio works better for cyclical companies. It gives you a better idea on the company's real book value.


Builders FirstSource Cyclically Adjusted Book per Share Related Terms


Builders FirstSource Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for Builders FirstSource's Cyclically Adjusted Book per Share 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.

Builders FirstSource Cyclically Adjusted Book per Share Chart

Builders FirstSource Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Cyclically Adjusted Book per Share
Get a 7-Day Free Trial Premium Member Only Premium Member Only 0.00 0.00 0.00 0.00 21.37

Builders FirstSource Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
Cyclically Adjusted Book per Share Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only 0.00 16.62 20.00 21.37 19.62

MIL:1BLDR vs AAON, OC, SPXC: Cyclically Adjusted Book per Share Comparison

For the Building Products & Equipment subindustry, Builders FirstSource's Cyclically Adjusted PB Ratio, along with its competitors' market caps and Cyclically Adjusted 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.


Builders FirstSource Cyclically Adjusted PB Ratio vs Construction Industry

For the Construction industry and Industrials sector, Builders FirstSource's Cyclically Adjusted PB Ratio distribution charts can be found below:

* The bar in red indicates where Builders FirstSource's Cyclically Adjusted PB Ratio falls into.


MIL:1BLDR
57GF Score
Builders FirstSource Inc MIL:1BLDR
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Builders FirstSource Cyclically Adjusted Book per Share Calculation

E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted Book per Share and the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted Book Value per Share of a company over the past 10 years.

What is Cyclically Adjusted Book per Share? How do we calculate Cyclically Adjusted Book per Share?

Cyclically Adjusted Book per Share is the average of the inflation adjusted Book Value per Share of a company over the past 10 years. Let's use an example to explain.

If we want to calculate the Cyclically Adjusted Book per Share of Wal-Mart (WMT) for Dec. 31, 2010, we need to have the inflation data and the book value per share from 2001 through 2010.

We adjusted the 2001 book value per share data with the total inflation from 2001 through 2010 to the equivalent book value in 2010. If the total inflation from 2001 to 2010 is 40%, and Wal-Mart's book value is $1 a share in 2001, then the 2001's equivalent book value in 2010 is $1.4 a share. If Wal-Mart's book value is $1 again in 2002, and the total inflation from 2002 through 2010 is 35%, then the equivalent 2002 book value in 2010 is $1.35. So on and so forth, you get the equivalent book value per share of past 10 years. Then you add them together and divided the sum by the count to get Cyclically Adjusted Book per Share.

Please note that we use the CPI data of the country/region where the company is headquartered. If the CPI data for that country/region is not available, then we will use the CPI data of the United States as default.

For example, Builders FirstSource's adjusted Book Value per Share data for the three months ended in Mar. 2026 was:

Adj_Book= Book Value per Share /CPI of Mar. 2026 (Change)*Current CPI (Mar. 2026)
=32.215/330.2130*330.2130
=32.215

Current CPI (Mar. 2026) = 330.2130.

Builders FirstSource Quarterly Data

Book Value per Share CPI Adj_Book
201606 1.358 241.018 1.861
201609 2.399 241.428 3.281
201612 2.631 241.432 3.598
201703 2.700 243.801 3.657
201706 2.902 244.955 3.912
201709 3.061 246.819 4.095
201712 2.799 246.524 3.749
201803 2.837 249.554 3.754
201806 3.445 251.989 4.514
201809 4.021 252.439 5.260
201812 4.555 251.233 5.987
201903 4.842 254.202 6.290
201906 5.378 256.143 6.933
201909 6.110 256.759 7.858
201912 6.398 256.974 8.221
202003 6.473 258.115 8.281
202006 6.970 257.797 8.928
202009 7.326 260.280 9.294
202012 8.111 260.474 10.283
202103 20.239 264.877 25.231
202106 21.962 271.696 26.692
202109 23.918 274.310 28.792
202112 23.636 278.802 27.994
202203 26.365 287.504 30.282
202206 30.326 296.311 33.796
202209 35.417 296.808 39.403
202212 33.736 296.797 37.534
202303 33.012 301.836 36.116
202306 32.054 305.109 34.691
202309 34.782 307.789 37.316
202312 35.612 306.746 38.336
202403 37.363 312.332 39.502
202406 34.341 314.175 36.094
202409 34.671 315.301 36.311
202412 36.126 315.605 37.798
202503 35.578 319.799 36.737
202506 32.771 322.561 33.548
202509 33.264 324.800 33.818
202512 33.611 324.054 34.250
202603 32.215 330.213 32.215

Add all the adjusted book value per share together and divide the count will get our Cyclically Adjusted Book per Share.

What does a Cyclically Adjusted Book per Share of €19.62 mean?
Builders FirstSource (MIL:1BLDR) has a Cyclically Adjusted Book per Share of €19.62 as of Mar. 2026. Cyclically adjusted book value per share represents the company's inflation-adjusted book value per share over a 10-year period. View historical data on Builders FirstSource and its competitors.
Is Builders FirstSource's Cyclically Adjusted Book per Share too high?
Builders FirstSource's current Cyclically Adjusted Book per Share is €19.62. Overall, Builders FirstSource has a GF Score™ of 57/100 and is considered Significantly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Builders FirstSource's Cyclically Adjusted Book per Share compare to AAON and OC?
Builders FirstSource's Cyclically Adjusted Book per Share of €19.62 can be compared against companies in the Construction industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Cyclically Adjusted Book per Share for a Construction company?
A good Cyclically Adjusted Book per Share depends on the Construction industry context. However, Cyclically Adjusted Book per Share 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 Cyclically Adjusted Book per Share mean?
A high Cyclically Adjusted Book per Share can signal that a stock is expensive relative to its fundamentals. Cyclically adjusted book value per share represents the company's inflation-adjusted book value per share over a 10-year period. View historical data on Builders FirstSource and its competitors. Builders FirstSource's current Cyclically Adjusted Book per Share is €19.62. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Builders FirstSource stock overvalued right now?
Based on GuruFocus' analysis, Builders FirstSource (MIL:1BLDR) is currently considered Significantly Undervalued. The stock's GF Value™ is €114.97, compared to a current price of €68.70 — trading 40.2% below its estimated fair value. The current Cyclically Adjusted Book per Share is €19.62. Builders FirstSource's overall GF Score™ is 57/100 with 7 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Cyclically Adjusted Book per Share calculated?
Cyclically Adjusted Book per Share is calculated from a company's financial statements. For Builders FirstSource (MIL:1BLDR), the current Cyclically Adjusted Book per Share is €19.62 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 Builders FirstSource (MIL:1BLDR) Overvalued in 2026?

Based on GuruFocus' analysis, Builders FirstSource stock appears to be undervalued. The current stock price of €68.70 is trading 40.2% below its estimated GF Value™ of €114.97. GuruFocus considers Builders FirstSource to be Significantly Undervalued.

Key valuation signals for MIL:1BLDR:

  • Cyclically Adjusted Book per Share: €19.62
  • GF Value™: €114.97 vs. price of €68.70 (40.2% below fair value)
  • GF Score™: 57/100 with 7 warning signs

No single metric tells the full story. See the MIL:1BLDR stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Builders FirstSource Business Description

Address 6031 Connection Drive, Suite 400, Irving, TX, USA, 75039
Builders FirstSource Inc is a manufacturer and supplier of building materials. The company offers structural and related building products such as factory-built roof and floor trusses, wall panels and stairs, vinyl windows, custom millwork and trim, and engineered wood. The products can be designed for each home individually and are installed by Builders FirstSource. The company's construction-related services include professional installation, turn-key framing, and shell construction. Builders FirstSource's customers range from large production builders to small custom homebuilders.
57GF Score

Get the complete analysis for MIL:1BLDR

Cyclically Adjusted Book per Share is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

€68.70
Price
€114.97
GF Value