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Stock Comparison

CNEY vs CLNE vs GPRE vs REX vs AMTX

Revenue, margins, valuation, and 5-year total return — side by side.

Live fundamentals10-year financials5-year price chart
CNEY
CN Energy Group. Inc.

Chemicals - Specialty

Basic MaterialsNASDAQ • CN
Market Cap$4M
5Y Perf.-99.5%
CLNE
Clean Energy Fuels Corp.

Oil & Gas Refining & Marketing

EnergyNASDAQ • US
Market Cap$507M
5Y Perf.-83.1%
GPRE
Green Plains Inc.

Chemicals - Specialty

Basic MaterialsNASDAQ • US
Market Cap$1.15B
5Y Perf.-28.2%
REX
REX American Resources Corporation

Chemicals - Specialty

Basic MaterialsNYSE • US
Market Cap$1.60B
5Y Perf.+216.8%
AMTX
Aemetis, Inc.

Oil & Gas Refining & Marketing

EnergyNASDAQ • US
Market Cap$213M
5Y Perf.-73.7%

CNEY vs CLNE vs GPRE vs REX vs AMTX — Key Financials

Market cap, revenue, margins, and valuation side-by-side.

Company Snapshot
CNEY logoCNEY
CLNE logoCLNE
GPRE logoGPRE
REX logoREX
AMTX logoAMTX
IndustryChemicals - SpecialtyOil & Gas Refining & MarketingChemicals - SpecialtyChemicals - SpecialtyOil & Gas Refining & Marketing
Market Cap$4M$507M$1.15B$1.60B$213M
Revenue (TTM)$87M$439M$1.94B$651M$209M
Net Income (TTM)$-25M$-99M$-15M$50M$-74M
Gross Margin-8.6%11.7%1.8%12.7%3.4%
Operating Margin-26.1%7.4%1.2%8.6%-13.4%
Forward P/E29.5x64.1x
Total Debt$3M$99M$508M$21M$318M
Cash & Equiv.$391K$158M$182M$196M$5M

CNEY vs CLNE vs GPRE vs REX vs AMTXLong-Term Stock Performance

Price return indexed to 100 at period start. Dividends excluded.

CNEY
CLNE
GPRE
REX
AMTX
StockFeb 21May 26Return
CN Energy Group. In… (CNEY)1000.5-99.5%
Clean Energy Fuels … (CLNE)10016.9-83.1%
Green Plains Inc. (GPRE)10071.8-28.2%
REX American Resour… (REX)100316.8+216.8%
Aemetis, Inc. (AMTX)10026.3-73.7%

Price return only. Dividends and distributions are not included.

Quick Verdict: CNEY vs CLNE vs GPRE vs REX vs AMTX

Each card shows where this stock fits in a portfolio — not just who wins on paper.

Bottom line: REX leads in 3 of 7 categories (5-stock set), making it the strongest pick for profitability and margin quality and capital preservation and lower volatility. Green Plains Inc. is the stronger pick specifically for valuation and capital efficiency and recent price momentum and sentiment. CLNE also leads in specific categories worth noting. This set spans 2 sectors — these stocks serve different portfolio roles, not just different price points.
CNEY
CN Energy Group. Inc.
The Lower-Volatility Pick

CNEY lags the leaders in this set but could rank higher in a more targeted comparison.

Best for: basic materials exposure
CLNE
Clean Energy Fuels Corp.
The Growth Play

CLNE ranks third and is worth considering specifically for growth exposure.

  • Rev growth 2.2%, EPS growth -173.0%, 3Y rev CAGR 0.4%
  • 2.2% revenue growth vs CNEY's -30.2%
Best for: growth exposure
GPRE
Green Plains Inc.
The Value Play

GPRE is the #2 pick in this set and the best alternative if value and momentum is your priority.

  • Better valuation composite
  • +336.6% vs CNEY's -85.4%
Best for: value and momentum
REX
REX American Resources Corporation
The Income Pick

REX carries the broadest edge in this set and is the clearest fit for income & stability and long-term compounding.

  • beta 0.36
  • 464.7% 10Y total return vs GPRE's 21.3%
  • Lower volatility, beta 0.36, Low D/E 3.3%, current ratio 8.64x
  • Beta 0.36, current ratio 8.64x
Best for: income & stability and long-term compounding
AMTX
Aemetis, Inc.
The Energy Pick

Among these 5 stocks, AMTX doesn't own a clear edge in any measured category.

Best for: energy exposure
See the full category breakdown
CategoryWinnerWhy
GrowthCLNE logoCLNE2.2% revenue growth vs CNEY's -30.2%
ValueGPRE logoGPREBetter valuation composite
Quality / MarginsREX logoREX7.7% margin vs AMTX's -35.4%
Stability / SafetyREX logoREXBeta 0.36 vs AMTX's 1.46
DividendsTieNone of these 5 stocks pay a meaningful dividend
Momentum (1Y)GPRE logoGPRE+336.6% vs CNEY's -85.4%
Efficiency (ROA)REX logoREX6.7% ROA vs AMTX's -29.3%, ROIC 11.4% vs -70.3%

CNEY vs CLNE vs GPRE vs REX vs AMTX — Revenue Breakdown by Segment

How each company's revenue is distributed across its business units

CNEYCN Energy Group. Inc.
FY 2025
Activated Carbon
100.0%$36M
CLNEClean Energy Fuels Corp.
FY 2025
Product
77.0%$365M
Service
12.5%$59M
Station construction sales
7.2%$34M
LCFS Credits
2.7%$13M
Other services
0.6%$3M
Federal Alternative Fuels Tax Credit
0.0%$198,000
GPREGreen Plains Inc.
FY 2025
Products And Services Other
101.2%$94M
Intersegment Revenues
-1.2%$-1,119,000
REXREX American Resources Corporation
FY 2024
Other Member
100.0%$329,000
AMTXAemetis, Inc.
FY 2025
Ethanol Sales
79.4%$116M
Wet Distiller's Grains Sales
20.6%$30M

CNEY vs CLNE vs GPRE vs REX vs AMTX — Financial Metrics

Side-by-side numbers across 5 stocks — who leads on profitability, valuation, growth, and risk.

BEST OVERALLREXLAGGINGAMTX

Income & Cash Flow (Last 12 Months)

REX leads this category, winning 3 of 6 comparable metrics.

GPRE is the larger business by revenue, generating $1.9B annually — 22.4x CNEY's $87M. REX is the more profitable business, keeping 7.7% of every revenue dollar as net income compared to AMTX's -35.4%. On growth, AMTX holds the edge at +27.4% YoY revenue growth, suggesting stronger near-term business momentum.

MetricCNEY logoCNEYCN Energy Group. …CLNE logoCLNEClean Energy Fuel…GPRE logoGPREGreen Plains Inc.REX logoREXREX American Reso…AMTX logoAMTXAemetis, Inc.
RevenueTrailing 12 months$87M$439M$1.9B$651M$209M
EBITDAEarnings before interest/tax-$19M$62M$122M$67M-$21M
Net IncomeAfter-tax profit-$25M-$99M-$15M$50M-$74M
Free Cash FlowCash after capex-$4M$19M$90M$18M-$38M
Gross MarginGross profit ÷ Revenue-8.6%+11.7%+1.8%+12.7%+3.4%
Operating MarginEBIT ÷ Revenue-26.1%+7.4%+1.2%+8.6%-13.4%
Net MarginNet income ÷ Revenue-29.1%-22.7%-0.8%+7.7%-35.4%
FCF MarginFCF ÷ Revenue-4.7%+4.3%+4.7%+2.7%-18.2%
Rev. Growth (YoY)Latest quarter vs prior year-2.4%+13.3%-25.9%+0.4%+27.4%
EPS Growth (YoY)Latest quarter vs prior year+94.2%+90.0%+134.2%+2.9%+29.8%
REX leads this category, winning 3 of 6 comparable metrics.

Valuation Metrics

Evenly matched — CNEY and GPRE each lead in 2 of 6 comparable metrics.

On an enterprise value basis, REX's 16.6x EV/EBITDA is more attractive than GPRE's 103.8x.

MetricCNEY logoCNEYCN Energy Group. …CLNE logoCLNEClean Energy Fuel…GPRE logoGPREGreen Plains Inc.REX logoREXREX American Reso…AMTX logoAMTXAemetis, Inc.
Market CapShares × price$4M$507M$1.1B$1.6B$213M
Enterprise ValueMkt cap + debt − cash$7M$448M$1.5B$1.4B$526M
Trailing P/EPrice ÷ TTM EPS-0.03x-2.29x-9.14x29.50x-2.44x
Forward P/EPrice ÷ next-FY EPS est.29.48x64.10x
PEG RatioP/E ÷ EPS growth rate0.55x
EV / EBITDAEnterprise value multiple94.64x103.82x16.60x
Price / SalesMarket cap ÷ Revenue0.11x1.19x0.55x2.50x1.02x
Price / BookPrice ÷ Book value/share0.00x0.90x1.44x2.67x
Price / FCFMarket cap ÷ FCF8.47x17.84x
Evenly matched — CNEY and GPRE each lead in 2 of 6 comparable metrics.

Profitability & Efficiency

REX leads this category, winning 7 of 9 comparable metrics.

REX delivers a 7.7% return on equity — every $100 of shareholder capital generates $8 in annual profit, vs $-25 for CNEY. REX carries lower financial leverage with a 0.03x debt-to-equity ratio, signaling a more conservative balance sheet compared to GPRE's 0.66x. On the Piotroski fundamental quality scale (0–9), CLNE scores 5/9 vs CNEY's 3/9, reflecting solid financial health.

MetricCNEY logoCNEYCN Energy Group. …CLNE logoCLNEClean Energy Fuel…GPRE logoGPREGreen Plains Inc.REX logoREXREX American Reso…AMTX logoAMTXAemetis, Inc.
ROE (TTM)Return on equity-24.9%-17.2%-2.0%+7.7%
ROA (TTM)Return on assets-23.5%-9.2%-1.0%+6.7%-29.3%
ROICReturn on invested capital-8.2%-9.4%-5.2%+11.4%-70.3%
ROCEReturn on capital employed-11.0%-9.4%-6.2%+10.1%-19.0%
Piotroski ScoreFundamental quality 0–935454
Debt / EquityFinancial leverage0.03x0.18x0.66x0.03x
Net DebtTotal debt minus cash$3M-$59M$326M-$175M$313M
Cash & Equiv.Liquid assets$390,706$158M$182M$196M$5M
Total DebtShort + long-term debt$3M$99M$508M$21M$318M
Interest CoverageEBIT ÷ Interest expense-29.77x-1.07x-0.08x-0.27x
REX leads this category, winning 7 of 9 comparable metrics.

Total Returns (Dividends Reinvested)

REX leads this category, winning 4 of 6 comparable metrics.

A $10,000 investment in REX five years ago would be worth $34,996 today (with dividends reinvested), compared to $54 for CNEY. Over the past 12 months, GPRE leads with a +336.6% total return vs CNEY's -85.4%. The 3-year compound annual growth rate (CAGR) favors REX at 50.8% vs CNEY's -51.2% — a key indicator of consistent wealth creation.

MetricCNEY logoCNEYCN Energy Group. …CLNE logoCLNEClean Energy Fuel…GPRE logoGPREGreen Plains Inc.REX logoREXREX American Reso…AMTX logoAMTXAemetis, Inc.
YTD ReturnYear-to-date+11.9%+6.9%+60.1%+50.2%+96.2%
1-Year ReturnPast 12 months-85.4%+44.4%+336.6%+147.6%+140.0%
3-Year ReturnCumulative with dividends-88.4%-46.3%-46.8%+243.1%+37.4%
5-Year ReturnCumulative with dividends-99.5%-73.8%-48.5%+250.0%-76.1%
10-Year ReturnCumulative with dividends-99.6%-26.9%+21.3%+464.7%+31.1%
CAGR (3Y)Annualised 3-year return-51.2%-18.7%-19.0%+50.8%+11.2%
REX leads this category, winning 4 of 6 comparable metrics.

Risk & Volatility

REX leads this category, winning 2 of 2 comparable metrics.

REX is the less volatile stock with a 0.36 beta — it tends to amplify market swings less than AMTX's 1.46 beta. A beta below 1.0 means the stock typically moves less than the S&P 500. REX currently trades 91.2% from its 52-week high vs CNEY's 9.6% drawdown — a narrower gap to the peak suggests stronger recent price momentum.

MetricCNEY logoCNEYCN Energy Group. …CLNE logoCLNEClean Energy Fuel…GPRE logoGPREGreen Plains Inc.REX logoREXREX American Reso…AMTX logoAMTXAemetis, Inc.
Beta (5Y)Sensitivity to S&P 5000.44x1.04x1.15x0.28x1.27x
52-Week HighHighest price in past year$7.36$3.11$18.94$53.36$3.80
52-Week LowLowest price in past year$0.31$1.56$3.39$19.44$1.22
% of 52W HighCurrent price vs 52-week peak+9.6%+74.3%+86.9%+91.2%+82.1%
RSI (14)Momentum oscillator 0–10054.544.654.359.158.2
Avg Volume (50D)Average daily shares traded643K1.3M1.5M204K1.8M
REX leads this category, winning 2 of 2 comparable metrics.

Analyst Outlook

Insufficient data to determine a leader in this category.

Analyst consensus: CLNE as "Buy", GPRE as "Buy", REX as "Buy", AMTX as "Buy". Consensus price targets imply 51.5% upside for CLNE (target: $4) vs -43.9% for AMTX (target: $2).

MetricCNEY logoCNEYCN Energy Group. …CLNE logoCLNEClean Energy Fuel…GPRE logoGPREGreen Plains Inc.REX logoREXREX American Reso…AMTX logoAMTXAemetis, Inc.
Analyst RatingConsensus buy/hold/sellBuyBuyBuyBuy
Price TargetConsensus 12-month target$3.50$16.50$60.00$1.75
# AnalystsCovering analysts222037
Dividend YieldAnnual dividend ÷ price
Dividend StreakConsecutive years of raises0
Dividend / ShareAnnual DPS
Buyback YieldShare repurchases ÷ mkt cap0.0%+1.6%+2.6%+0.9%0.0%
Insufficient data to determine a leader in this category.
Key Takeaway

REX leads in 4 of 6 categories — strongest in Income & Cash Flow and Profitability & Efficiency. 1 category is tied.

Best OverallREX American Resources Corp… (REX)Leads 4 of 6 categories
Loading custom metrics...

CNEY vs CLNE vs GPRE vs REX vs AMTX: Key Questions Answered

10 questions · data-driven answers · updated daily

01

Is CNEY or CLNE or GPRE or REX or AMTX a better buy right now?

For growth investors, Clean Energy Fuels Corp.

(CLNE) is the stronger pick with 2. 2% revenue growth year-over-year, versus -30. 2% for CN Energy Group. Inc. (CNEY). REX American Resources Corporation (REX) offers the better valuation at 29. 5x trailing P/E (64. 1x forward), making it the more compelling value choice. Analysts rate Clean Energy Fuels Corp. (CLNE) a "Buy" — based on 22 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

02

Which has the better valuation — CNEY or CLNE or GPRE or REX or AMTX?

On forward P/E, Green Plains Inc.

is actually cheaper at 29. 5x — notably different from the trailing picture, reflecting expected earnings growth.

03

Which is the better long-term investment — CNEY or CLNE or GPRE or REX or AMTX?

Over the past 5 years, REX American Resources Corporation (REX) delivered a total return of +250.

0%, compared to -99. 5% for CN Energy Group. Inc. (CNEY). Over 10 years, the gap is even starker: REX returned +476. 3% versus CNEY's -99. 6%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

04

Which is safer — CNEY or CLNE or GPRE or REX or AMTX?

By beta (market sensitivity over 5 years), REX American Resources Corporation (REX) is the lower-risk stock at 0.

28β versus Aemetis, Inc. 's 1. 27β — meaning AMTX is approximately 354% more volatile than REX relative to the S&P 500. On balance sheet safety, REX American Resources Corporation (REX) carries a lower debt/equity ratio of 3% versus 66% for Green Plains Inc. — giving it more financial flexibility in a downturn.

05

Which is growing faster — CNEY or CLNE or GPRE or REX or AMTX?

By revenue growth (latest reported year), Clean Energy Fuels Corp.

(CLNE) is pulling ahead at 2. 2% versus -30. 2% for CN Energy Group. Inc. (CNEY). On earnings-per-share growth, the picture is similar: CN Energy Group. Inc. grew EPS 79. 2% year-over-year, compared to -173. 0% for Clean Energy Fuels Corp.. Over a 3-year CAGR, CLNE leads at 0. 4% annualised revenue growth. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

06

Which has better profit margins — CNEY or CLNE or GPRE or REX or AMTX?

REX American Resources Corporation (REX) is the more profitable company, earning 9.

1% net margin versus -52. 3% for Clean Energy Fuels Corp. — meaning it keeps 9. 1% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: REX leads at 10. 0% versus -30. 9% for CNEY. At the gross margin level — before operating expenses — REX leads at 14. 2%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

07

Is CNEY or CLNE or GPRE or REX or AMTX more undervalued right now?

On forward earnings alone, Green Plains Inc.

(GPRE) trades at 29. 5x forward P/E versus 64. 1x for REX American Resources Corporation — 34. 6x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for CLNE: 51. 5% to $3. 50.

08

Which pays a better dividend — CNEY or CLNE or GPRE or REX or AMTX?

None of the stocks in this comparison currently pay a material dividend.

All are effectively zero-yield and should be held for capital appreciation rather than income.

09

Is CNEY or CLNE or GPRE or REX or AMTX better for a retirement portfolio?

For long-horizon retirement investors, REX American Resources Corporation (REX) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0.

28), +476. 3% 10Y return). Both have compounded well over 10 years (REX: +476. 3%, AMTX: +8. 8%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

10

What are the main differences between CNEY and CLNE and GPRE and REX and AMTX?

These companies operate in different sectors (CNEY (Basic Materials) and CLNE (Energy) and GPRE (Basic Materials) and REX (Basic Materials) and AMTX (Energy)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.

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CNEY

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  • Sector: Basic Materials
  • Market Cap > $100B
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  • Sector: Energy
  • Market Cap > $100B
  • Revenue Growth > 6%
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GPRE

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REX

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  • Sector: Basic Materials
  • Market Cap > $100B
  • Net Margin > 5%
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AMTX

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  • Sector: Energy
  • Market Cap > $100B
  • Revenue Growth > 13%
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(CNEY: -2.4% · CLNE: 13.3%)

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