Sunrun (FRA:3S9) Cyclically Adjusted Book per Share: €17.14 (As of Jun. 2026)

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Director of Data and Quant Analytics at GuruFocus
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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.

FRA:3S9 Sunrun Inc FRA:3S9
66 GF Score
Price €7.75
GF Value €12.77
Valuation Possible Value Trap
! 7 Warning Signs
View Full Analysis

What is Sunrun Cyclically Adjusted Book per Share?

Sunrun FRA:3S9 -0.39% 66 Cyclically Adjusted Book per Share is €17.14 as of Jun. 2026. GuruFocus rates FRA:3S9 with a GF Score™ of 66/100 and a GF Value™ of €12.77 (Possible Value Trap). 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.

Sunrun's adjusted book value per share for the three months ended in Jun. 2026 was €12.616. 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 €17.14 for the trailing ten years ended in Jun. 2026.

During the past 12 months, Sunrun's average Cyclically Adjusted Book Growth Rate was 6.80% 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.

As of today (2026-08-28), Sunrun's current stock price is €7.75. Sunrun's Cyclically Adjusted Book per Share for the quarter that ended in Jun. 2026 was €17.14. Sunrun's Cyclically Adjusted PB Ratio of today is 0.45.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Sunrun was 1.25. The lowest was 0.34. And the median was 0.70.


Sunrun  (FRA:3S9) 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.

Sunrun's Cyclically Adjusted PB Ratio of today is calculated as

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=7.75/17.14
=0.45

* 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 Sunrun was 1.25. The lowest was 0.34. And the median was 0.70.


Be Aware

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


Sunrun Cyclically Adjusted Book per Share Related Terms


Sunrun Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for Sunrun'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.

Sunrun Cyclically Adjusted Book per Share Chart

Sunrun 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 15.33 17.82 17.02

Sunrun Quarterly Data
Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26 Jun26
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 15.41 15.78 17.02 16.65 17.14

FRA:3S9 vs SEDG, SHLS, CSIQ: Cyclically Adjusted Book per Share Comparison

For the Solar subindustry, Sunrun'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.


Sunrun Cyclically Adjusted PB Ratio vs Semiconductors Industry

For the Semiconductors industry and Technology sector, Sunrun's Cyclically Adjusted PB Ratio distribution charts can be found below:

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


FRA:3S9
66GF Score
Sunrun Inc FRA:3S9
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Sunrun 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, Sunrun's adjusted Book Value per Share data for the three months ended in Jun. 2026 was:

Adj_Book= Book Value per Share /CPI of Jun. 2026 (Change)*Current CPI (Jun. 2026)
=12.616/333.9520*333.9520
=12.616

Current CPI (Jun. 2026) = 333.9520.

Sunrun Quarterly Data

Book Value per Share CPI Adj_Book
201609 5.435 241.428 7.518
201612 6.115 241.432 8.458
201703 6.195 243.801 8.486
201706 6.059 244.955 8.260
201709 5.930 246.819 8.023
201712 6.939 246.524 9.400
201803 6.975 249.554 9.334
201806 7.425 251.989 9.840
201809 7.421 252.439 9.817
201812 7.370 251.233 9.797
201903 7.131 254.202 9.368
201906 6.914 256.143 9.014
201909 7.136 256.759 9.281
201912 7.330 256.974 9.526
202003 6.573 258.115 8.504
202006 6.448 257.797 8.353
202009 6.879 260.280 8.826
202012 24.806 260.474 31.804
202103 25.442 264.877 32.077
202106 24.881 271.696 30.582
202109 25.568 274.310 31.127
202112 26.590 278.802 31.850
202203 27.161 287.504 31.549
202206 28.328 296.311 31.927
202209 31.390 296.808 35.318
202212 29.566 296.797 33.267
202303 28.075 301.836 31.062
202306 28.056 305.109 30.708
202309 24.149 307.789 26.202
202312 21.861 306.746 23.800
202403 21.598 312.332 23.093
202406 22.323 314.175 23.728
202409 21.222 315.301 22.477
202412 10.809 315.605 11.437
202503 10.642 319.799 11.113
202506 11.017 322.561 11.406
202509 10.977 324.800 11.286
202512 11.451 324.054 11.801
202603 12.270 330.213 12.409
202606 12.616 333.952 12.616

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 €17.14 mean?
Sunrun (FRA:3S9) has a Cyclically Adjusted Book per Share of €17.14 as of Jun. 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 Sunrun and its competitors.
Is Sunrun's Cyclically Adjusted Book per Share too high?
Sunrun's current Cyclically Adjusted Book per Share is €17.14. Overall, Sunrun has a GF Score™ of 66/100 and is considered Possible Value Trap, reflecting its overall financial health beyond just this single metric.
How does Sunrun's Cyclically Adjusted Book per Share compare to SEDG and SHLS?
Sunrun's Cyclically Adjusted Book per Share of €17.14 can be compared against companies in the Semiconductors 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 Semiconductors company?
A good Cyclically Adjusted Book per Share depends on the Semiconductors 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 Sunrun and its competitors. Sunrun's current Cyclically Adjusted Book per Share is €17.14. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Sunrun stock overvalued right now?
Based on GuruFocus' analysis, Sunrun (FRA:3S9) is currently considered Possible Value Trap. The stock's GF Value™ is €12.77, compared to a current price of €7.75 — trading 39.3% below its estimated fair value. The current Cyclically Adjusted Book per Share is €17.14. Sunrun's overall GF Score™ is 66/100 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 Sunrun (FRA:3S9), the current Cyclically Adjusted Book per Share is €17.14 as of Jun. 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 Sunrun (FRA:3S9) Overvalued in 2026?

Based on GuruFocus' analysis, Sunrun stock appears to be undervalued. The current stock price of €7.75 is trading 39.3% below its estimated GF Value™ of €12.77. GuruFocus considers Sunrun to be Possible Value Trap.

Key valuation signals for FRA:3S9:

  • Cyclically Adjusted Book per Share: €17.14
  • GF Value™: €12.77 vs. price of €7.75 (39.3% below fair value)
  • GF Score™: 66/100 with 7 warning signs

No single metric tells the full story. See the FRA:3S9 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Sunrun Business Description

Address 600 California Street, Suite 1800, San Francisco, CA, USA, 94108
Sunrun is engaged in the design, development, installation, sale, ownership, and maintenance of residential solar energy systems in the United States. The company acquires customers directly and through relationships with various solar and strategic partners. The solar systems are constructed by Sunrun or by Sunrun's partners and are owned by the company. Sunrun's customers typically enter into 20- to 25-year agreements to utilize its solar energy system. The company also sells solar energy systems and products, such as panels and racking, and solar leads generated to customers.
66GF Score

Get the complete analysis for FRA:3S9

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

€7.75
Price
€12.77
GF Value