FALC (FalconStor Software) E10: $-7.11 (As of Dec. 2025)

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.

FALC FalconStor Software Inc FALC
53 GF Score
Price $1.84
GF Value $1.47
Valuation Modestly Overvalued
! 5 Warning Signs
View Full Analysis

What is FalconStor Software E10?

FalconStor Software FALC 53 E10 is $-7.11 as of Dec. 2025. GuruFocus rates FALC with a GF Score™ of 53/100 and a GF Value™ of $1.47 (Modestly Overvalued). The stock has 5 warning signs investors should review.

E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller P/E calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years.

FalconStor Software's adjusted earnings per share data for the three months ended in Dec. 2025 was $0.190. Add all the adjusted EPS for the past 10 years together and divide 10 will get our e10, which is $-7.11 for the trailing ten years ended in Dec. 2025.

During the past 3 years, the average E10 Growth Rate was 14.60% per year. During the past 5 years, the average E10 Growth Rate was 19.00% per year. During the past 10 years, the average E10 Growth Rate was 13.70% 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 E10 growth rate using E10 data.

During the past 13 years, the highest 3-Year average E10 Growth Rate of FalconStor Software was 26.70% per year. The lowest was -11.30% per year. And the median was 10.80% per year.

As of today (2026-09-11), FalconStor Software's current stock price is $1.84. FalconStor Software's E10 for the quarter that ended in Dec. 2025 was $-7.11. FalconStor Software's Shiller PE Ratio of today is .


FalconStor Software  (OTCPK:FALC) E10 Explanation

If a company grows much fast than inflation, E10 may underestimate the company's earnings power. Shiller PE Ratio can seem to be too high even the actual P/E is low.

For the Shiller P/E, the earnings of the past 10 years are inflation-adjusted and averaged. The result is used for P/E calculation. Since it looks at the average over the last 10 years, the Shiller P/E is also called PE10.

The Shiller P/E was first used by professor Robert Shiller to measure the valuation of the overall market. The same calculation is applied here to individual companies.


Be Aware

Shiller PE Ratio works better for cyclical companies. It gives you a better idea on the company's real earnings power.


FalconStor Software E10 Related Terms


FalconStor Software E10 Historical Data

* Premium members only.

The historical data trend for FalconStor Software's E10 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.

FalconStor Software E10 Chart

FalconStor Software Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
E10
Get a 7-Day Free Trial Premium Member Only Premium Member Only -14.57 -11.42 -8.66 -7.32 -7.11

FalconStor Software Quarterly Data
Sep20 Dec20 Mar21 Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Jun24 Sep24 Dec24 Jun25 Sep25 Dec25
E10 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 -8.37 -7.32 -6.67 -8.10 -7.11

FALC vs INUV, NVNI, QH: E10 Comparison

For the Software - Application subindustry, FalconStor Software's Shiller PE Ratio, along with its competitors' market caps and Shiller PE 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.


FalconStor Software Shiller PE Ratio vs Software Industry

For the Software industry and Technology sector, FalconStor Software's Shiller PE Ratio distribution charts can be found below:

* The bar in red indicates where FalconStor Software's Shiller PE Ratio falls into.


FALC
53GF Score
FalconStor Software Inc FALC
E10 is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

FalconStor Software E10 Calculation

E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller P/E calculation. When we calculate the today's Shiller P/E ratio of a stock, we use today's price divided by E10.

What is E10? How do we calculate E10?

E10 is the average of the inflation adjusted earnings of a company over the past 10 years. Let's use an example to explain.

If we want to calculate the E10 of Wal-Mart (WMT) for Dec. 31, 2010, we need to have the inflation data and the earnings from 2001 through 2010.

We adjusted the earnings of 2001 earnings data with the total inflation from 2001 through 2010 to the equivalent earnings in 2010. If the total inflation from 2001 to 2010 is 40%, and Wal-Mart earned $1 a share in 2001, then the 2001's equivalent earnings in 2010 is $1.4 a share. If Wal-Mart earns $1 again in 2002, and the total inflation from 2002 through 2010 is 35%, then the equivalent 2002 earnings in 2010 is $1.35. So on and so forth, you get the equivalent earnings of past 10 years. Then you add them together and divided the sum by 10 to get E10.

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, FalconStor Software's adjusted earnings per share data for the three months ended in Dec. 2025 was:

Adj_EPS= Earnings per Share (Diluted) /CPI of Dec. 2025 (Change)*Current CPI (Dec. 2025)
=0.19/324.0540*324.0540
=0.190

Current CPI (Dec. 2025) = 324.0540.

FalconStor Software Quarterly Data

per share eps CPI Adj_EPS
201509 -7.000 237.945 -9.533
201512 -6.000 236.525 -8.220
201603 -11.000 238.132 -14.969
201606 -9.000 241.018 -12.101
201609 -5.000 241.428 -6.711
201612 -5.000 241.432 -6.711
201703 -3.000 243.801 -3.988
201706 -2.000 244.955 -2.646
201709 2.000 246.819 2.626
201712 2.000 246.524 2.629
201803 -5.000 249.554 -6.493
201806 -1.540 251.989 -1.980
201809 -0.700 252.439 -0.899
201812 -0.303 251.233 -0.391
201903 -0.090 254.202 -0.115
201906 -0.270 256.143 -0.342
201909 -0.160 256.759 -0.202
201912 -0.050 256.974 -0.063
202003 -0.170 258.115 -0.213
202006 -0.003 257.797 -0.004
202009 0.190 260.280 0.237
202012 -0.090 260.474 -0.112
202103 -0.010 264.877 -0.012
202106 -0.120 271.696 -0.143
202109 0.010 274.310 0.012
202112 -0.070 278.802 -0.081
202203 -0.200 287.504 -0.225
202206 -0.180 296.311 -0.197
202209 -0.030 296.808 -0.033
202212 -0.060 296.797 -0.066
202303 -0.110 301.836 -0.118
202306 -0.120 305.109 -0.127
202309 0.060 307.789 0.063
202312 0.080 306.746 0.085
202406 -0.070 314.175 -0.072
202409 0.030 315.301 0.031
202412 -0.040 315.605 -0.041
202506 -0.110 322.561 -0.111
202509 -0.070 324.800 -0.070
202512 0.190 324.054 0.190

Add all the adjusted EPS together and divide 10 will get our e10.

Frequently Asked Questions Learn more about E10 →
What does a E10 of $-7.11 mean?
FalconStor Software (FALC) has a E10 of $-7.11 as of Dec. 2025. E10 represents the company's inflation-adjusted earnings per share over a 10-year period. View historical data on FalconStor Software and its competitors.
Is FalconStor Software's E10 too high?
FalconStor Software's current E10 is $-7.11. Overall, FalconStor Software has a GF Score™ of 53/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does FalconStor Software's E10 compare to INUV and NVNI?
FalconStor Software's E10 of $-7.11 can be compared against companies in the Software industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good E10 for a Software company?
A good E10 depends on the Software industry context. However, E10 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 E10 mean?
A high E10 can signal that a stock is expensive relative to its fundamentals. E10 represents the company's inflation-adjusted earnings per share over a 10-year period. View historical data on FalconStor Software and its competitors. FalconStor Software's current E10 is $-7.11. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is FalconStor Software stock overvalued right now?
Based on GuruFocus' analysis, FalconStor Software (FALC) is currently considered Modestly Overvalued. The stock's GF Value™ is $1.47, compared to a current price of $1.84 — trading 25.2% above its estimated fair value. The current E10 is $-7.11. FalconStor Software's overall GF Score™ is 53/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is E10 calculated?
E10 is calculated from a company's financial statements. For FalconStor Software (FALC), the current E10 is $-7.11 as of Dec. 2025. 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 FalconStor Software (FALC) Overvalued in 2026?

Based on GuruFocus' analysis, FalconStor Software stock appears to be overvalued. The current stock price of $1.84 is trading 25.2% above its estimated GF Value™ of $1.47. GuruFocus considers FalconStor Software to be Modestly Overvalued.

Key valuation signals for FALC:

  • E10: $-7.11
  • GF Value™: $1.47 vs. price of $1.84 (25.2% above fair value)
  • GF Score™: 53/100 with 5 warning signs

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


FalconStor Software Business Description

Address 111 Congress Avenue, Suite 500, Austin, TX, USA, 78701
FalconStor Software Inc operates in the trusted data protection software industry, modernizing disaster recovery and backup operations for the hybrid cloud environment. The company enables enterprise customers and managed service providers to secure, migrate, and protect their data while reducing storage costs and long-term retention needs. Its products are StorSafe, StorGuard, and StorSight, which deliver data protection, cloud migration, disaster recovery, ransomware recovery, and needs across multi-OS, multi-storage, and on-premises to cloud/hybrid cloud environments. The company's geographical markets include the Americas, which generate the highest revenue, Europe, the Middle East, Africa, and others.
53GF Score

Get the complete analysis for FALC

E10 is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

$1.84
Price
$1.47
GF Value