ACFN (Acorn Energy) Shiller PE Ratio: (As of Aug. 07, 2026)

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ACFN Acorn Energy Inc ACFN
61 GF Score
Price $18.11
GF Value $13.86
Valuation Significantly Overvalued
! 5 Warning Signs
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What is Acorn Energy Shiller PE Ratio?

Shiller PE for Stocks: The True Measure of Stock Valuation


Acorn Energy  (NAS:ACFN) Shiller PE Ratio Explanation

Compared with the regular PE Ratio, which works poorly for cyclical businesses, the Shiller PE Ratio smoothed out the fluctuations of profit margins during business cycles. Therefore it is more accurate in reflecting the valuation of the company.

If a company has consistent business performance, the Shiller PE Ratio should give similar results to regular PE Ratio.

Compared with the PS Ratio, the Shiller PE Ratio makes the comparison between different industries more meaningful.


Be Aware

Shiller PE Ratio assumes that over the long term, businesses and profitability revert to their means. If a company's business model does not work in the future compared with the past, Shiller PE Ratio and PS Ratio will give false valuations.


Acorn Energy Shiller PE Ratio Related Terms


Acorn Energy Shiller PE Ratio Historical Data

* Premium members only.

The historical data trend for Acorn Energy's Shiller PE 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.

Acorn Energy Shiller PE Ratio Chart

Acorn Energy Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Shiller PE Ratio
Get a 7-Day Free Trial Premium Member Only Premium Member Only 0.00 0.00 0.00 0.00 309.69

Acorn Energy Quarterly Data
Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26 Jun26
Shiller PE Ratio 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 0.00 309.69 57.25 0.00

ACFN vs MIND, LGL, AATC: Shiller PE Ratio Comparison

For the Scientific & Technical Instruments subindustry, Acorn Energy'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.


Acorn Energy Shiller PE Ratio vs Hardware Industry

For the Hardware industry and Technology sector, Acorn Energy's Shiller PE Ratio distribution charts can be found below:

* The bar in red indicates where Acorn Energy's Shiller PE Ratio falls into.


ACFN
61GF Score
Acorn Energy Inc ACFN
Shiller PE Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Acorn Energy Shiller PE Ratio Calculation

For Shiller PE Ratio, 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 PE Ratio is also called PE10.

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

Acorn Energy's E10 for the quarter that ended in Jun. 2026 is calculated as:

For example, Acorn Energy's adjusted earnings per share data for the three months ended in Jun. 2026 was:

Adj_EPS=Earnings per Share (Diluted)/CPI of Jun. 2026 (Change)*Current CPI (Jun. 2026)
=0.12/333.9520*333.9520
=0.120

Current CPI (Jun. 2026) = 333.9520.

Acorn Energy Quarterly Data

Earnings per Share (Diluted) CPI Adj_EPS
201609 0.320 241.428 0.443
201612 0.017 241.432 0.024
201703 -0.160 243.801 -0.219
201706 -0.320 244.955 -0.436
201709 0.160 246.819 0.216
201712 -0.320 246.524 -0.433
201803 -0.640 249.554 -0.856
201806 -0.320 251.989 -0.424
201809 0.002 252.439 0.003
201812 -0.160 251.233 -0.213
201903 -0.160 254.202 -0.210
201906 -0.160 256.143 -0.209
201909 -0.048 256.759 -0.062
201912 -0.024 256.974 -0.031
202003 -0.160 258.115 -0.207
202006 -0.013 257.797 -0.017
202009 -0.013 260.280 -0.017
202012 0.160 260.474 0.205
202103 0.008 264.877 0.010
202106 0.001 271.696 0.001
202109 0.009 274.310 0.011
202112 -0.027 278.802 -0.032
202203 -0.050 287.504 -0.058
202206 -0.160 296.311 -0.180
202209 -0.080 296.808 -0.090
202212 0.000 296.797 0.000
202303 -0.030 301.836 -0.033
202306 0.040 305.109 0.044
202309 0.010 307.789 0.011
202312 0.040 306.746 0.044
202403 0.030 312.332 0.032
202406 0.110 314.175 0.117
202409 0.290 315.301 0.307
202412 2.080 315.605 2.201
202503 0.190 319.799 0.198
202506 0.280 322.561 0.290
202509 0.100 324.800 0.103
202512 0.420 324.054 0.433
202603 -0.030 330.213 -0.030
202606 0.120 333.952 0.120

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

Is Acorn Energy (ACFN) Overvalued in 2026?

Based on GuruFocus' analysis, Acorn Energy stock appears to be overvalued. The current stock price of $18.11 is trading 30.7% above its estimated GF Value™ of $13.86. GuruFocus considers Acorn Energy to be Significantly Overvalued.

Key valuation signals for ACFN:

  • Shiller PE Ratio:
  • GF Value™: $13.86 vs. price of $18.11 (30.7% above fair value)
  • GF Score™: 61/100 with 5 warning signs

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


Acorn Energy Business Description

Address 1000 N West Street, Suite 1200, Wilmington, DE, USA, 19801
Acorn Energy Inc is a holding company that focuses on technology-driven solutions for energy infrastructure asset management. The company operates through two segments namely, the PG segment and the CP segment. PG segment provides wireless remote monitoring and control systems and services for critical assets as well as Internet of Things applications which account for the majority of the revenue. CP segment is engaged in providing remote monitoring of cathodic protection systems on gas pipelines for gas utilities and pipeline companies.
61GF Score

Get the complete analysis for ACFN

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

$18.11
Price
$13.86
GF Value