Aqua Metals (FRA:AQK) E10: €-681.68 (As of Mar. 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:AQK Aqua Metals Inc FRA:AQK
21 GF Score
Price €20.36
! 3 Warning Signs
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What is Aqua Metals E10?

Aqua Metals FRA:AQK 21 E10 is €-681.68 as of Mar. 2026. GuruFocus rates FRA:AQK with a GF Score™ of 21/100. The stock has 3 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.

Aqua Metals's adjusted earnings per share data for the three months ended in Mar. 2026 was €-1.055. Add all the adjusted EPS for the past 10 years together and divide 10 will get our e10, which is €-681.68 for the trailing ten years ended in Mar. 2026.

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.

As of today (2026-07-13), Aqua Metals's current stock price is €20.36. Aqua Metals's E10 for the quarter that ended in Mar. 2026 was €-681.68. Aqua Metals's Shiller PE Ratio of today is .


Aqua Metals  (FRA:AQK) 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.


Aqua Metals E10 Related Terms


Aqua Metals E10 Historical Data

* Premium members only.

The historical data trend for Aqua Metals'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.

Aqua Metals E10 Chart

Aqua Metals 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 0.00 0.00 0.00 -140.54 -613.30

Aqua Metals Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
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 -171.13 -643.46 -475.18 -613.30 -681.68

FRA:AQK vs AWX, OCLN, CDTG: E10 Comparison

For the Waste Management subindustry, Aqua Metals'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.


Aqua Metals Shiller PE Ratio vs Waste Management Industry

For the Waste Management industry and Industrials sector, Aqua Metals's Shiller PE Ratio distribution charts can be found below:

* The bar in red indicates where Aqua Metals's Shiller PE Ratio falls into.


FRA:AQK
21GF Score
Aqua Metals Inc FRA:AQK
E10 is just one metric. See GF Score™, valuation, warning signs, and more.
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Aqua Metals 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, Aqua Metals's adjusted earnings per share data for the three months ended in Mar. 2026 was:

Adj_EPS= Earnings per Share (Diluted) /CPI of Mar. 2026 (Change)*Current CPI (Mar. 2026)
=-1.055/330.2130*330.2130
=-1.055

Current CPI (Mar. 2026) = 330.2130.

Aqua Metals Quarterly Data

per share eps CPI Adj_EPS
201606 -35.600 241.018 -48.775
201609 -40.986 241.428 -56.059
201612 -58.776 241.432 -80.390
201703 -48.620 243.801 -65.853
201706 -74.760 244.955 -100.781
201709 -52.018 246.819 -69.594
201712 -54.080 246.524 -72.439
201803 -43.794 249.554 -57.949
201806 -56.496 251.989 -74.034
201809 -41.136 252.439 -53.810
201812 -63.288 251.233 -83.184
201903 -47.790 254.202 -62.080
201906 -37.170 256.143 -47.919
201909 -36.320 256.759 -46.710
201912 -36.000 256.974 -46.260
202003 -12.670 258.115 -16.209
202006 -12.432 257.797 -15.924
202009 -5.094 260.280 -6.463
202012 -41.100 260.474 -52.104
202103 -10.080 264.877 -12.566
202106 -19.920 271.696 -24.210
202109 -3.400 274.310 -4.093
202112 -10.620 278.802 -12.578
202203 -10.896 287.504 -12.515
202206 -7.568 296.311 -8.434
202209 -10.100 296.808 -11.237
202212 -9.440 296.797 -10.503
202303 -11.208 301.836 -12.262
202306 -11.076 305.109 -11.987
202309 -8.339 307.789 -8.947
202312 -18.157 306.746 -19.546
202403 -9.660 312.332 -10.213
202406 -9.234 314.175 -9.705
202409 -6.884 315.301 -7.210
202412 -10.047 315.605 -10.512
202503 -9.500 319.799 -9.809
202506 -6.450 322.561 -6.603
202509 -1.866 324.800 -1.897
202512 -1.264 324.054 -1.288
202603 -1.055 330.213 -1.055

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 €-681.68 mean?
Aqua Metals (FRA:AQK) has a E10 of €-681.68 as of Mar. 2026. E10 represents the company's inflation-adjusted earnings per share over a 10-year period. View historical data on Aqua Metals and its competitors.
Is Aqua Metals' E10 too high?
Aqua Metals' current E10 is €-681.68. Overall, Aqua Metals has a GF Score™ of 21/100, reflecting its overall financial health beyond just this single metric.
How does Aqua Metals' E10 compare to AWX and OCLN?
Aqua Metals' E10 of €-681.68 can be compared against companies in the Waste Management 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 Waste Management company?
A good E10 depends on the Waste Management 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 Aqua Metals and its competitors. Aqua Metals's current E10 is €-681.68. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Aqua Metals stock overvalued right now?
Aqua Metals (FRA:AQK) has a current E10 of €-681.68. The current E10 is €-681.68. Aqua Metals' overall GF Score™ is 21/100 with 3 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 Aqua Metals (FRA:AQK), the current E10 is €-681.68 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.

Aqua Metals Business Description

Other Exchanges AQMS:USA0HH6:UK
Address 5370 Kietzke Lane, Suite 201, Reno, NV, USA, 89511
Aqua Metals Inc is developing and seeking to commercialize proprietary recycling and refining technologies for the recovery of critical minerals and metals. Its patented and patent-pending AquaRefining process is an electro-hydrometallurgical method designed to recover high-purity materials from battery and other metal-bearing feedstocks using a closed-loop system powered by electricity. Its idea is to reduce CAPEX and OPEX costs, reduce emissions, hazardous waste, and reliance on conventional smelting and chemical-intensive refining processes. It has one operating segment: sustainable metals recycling. It focused on the development and commercialization of AquaRefining technology for the clean and efficient recovery of valuable metals from lead-acid and lithium-ion batteries.
21GF Score

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

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