CLNE vs AMTX

For growth investors, Clean Energy Fuels Corp.

(CLNE) is the stronger pick with 2. 2% revenue growth year-over-year, versus -22. 3% for Aemetis, Inc. (AMTX). 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.

Over the past 5 years, Clean Energy Fuels Corp.

(CLNE) delivered a total return of -77. 1%, compared to -80. 5% for Aemetis, Inc. (AMTX). Over 10 years, the gap is even starker: AMTX returned +12. 1% versus CLNE's -28. 9%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), Clean Energy Fuels Corp.

(CLNE) is the lower-risk stock at 1. 19β versus Aemetis, Inc. 's 1. 46β — meaning AMTX is approximately 22% more volatile than CLNE relative to the S&P 500.

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

(CLNE) is pulling ahead at 2. 2% versus -22. 3% for Aemetis, Inc. (AMTX). On earnings-per-share growth, the picture is similar: Aemetis, Inc. grew EPS 33. 0% 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.

Aemetis, Inc.

(AMTX) is the more profitable company, earning -37. 0% net margin versus -52. 3% for Clean Energy Fuels Corp. — meaning it keeps -37. 0% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: AMTX leads at -17. 9% versus -35. 0% for CLNE. At the gross margin level — before operating expenses — AMTX leads at -0. 4%, 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.

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.

For long-horizon retirement investors, Clean Energy Fuels Corp.

(CLNE) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 1. 19)). Both have compounded well over 10 years (CLNE: -28. 9%, AMTX: +12. 1%), 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.

Both stocks operate in the Energy sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

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.