ENS vs AMTX vs CLNE vs PLUG vs BE

For growth investors, Bloom Energy Corporation (BE) is the stronger pick with 37.

3% revenue growth year-over-year, versus -22. 3% for Aemetis, Inc. (AMTX). EnerSys (ENS) offers the better valuation at 24. 8x trailing P/E (21. 6x forward), making it the more compelling value choice. Analysts rate EnerSys (ENS) a "Buy" — based on 16 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.

On forward P/E, EnerSys is actually cheaper at 21.

6x.

Over the past 5 years, Bloom Energy Corporation (BE) delivered a total return of +1013%, compared to -86.

4% for Plug Power Inc. (PLUG). Over 10 years, the gap is even starker: BE returned +934. 6% versus CLNE's -26. 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 Bloom Energy Corporation's 3. 61β — meaning BE is approximately 203% more volatile than CLNE relative to the S&P 500. On balance sheet safety, Clean Energy Fuels Corp. (CLNE) carries a lower debt/equity ratio of 18% versus 20% for Plug Power Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Bloom Energy Corporation (BE) is pulling ahead at 37.

3% versus -22. 3% for Aemetis, Inc. (AMTX). On earnings-per-share growth, the picture is similar: Plug Power Inc. grew EPS 100. 0% year-over-year, compared to -184. 6% for Bloom Energy Corporation. Over a 3-year CAGR, BE leads at 19. 1% 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.

EnerSys (ENS) is the more profitable company, earning 10.

1% net margin versus -229. 8% for Plug Power Inc. — meaning it keeps 10. 1% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: PLUG leads at 38. 1% versus -22. 1% for CLNE. At the gross margin level — before operating expenses — PLUG leads at 99. 8%, 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.

On forward earnings alone, EnerSys (ENS) trades at 21.

6x forward P/E versus 123. 6x for Bloom Energy Corporation — 102. 0x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for CLNE: 51. 5% to $3. 50.

In this comparison, ENS (0.

4% yield) pays a dividend. AMTX, CLNE, PLUG, BE do not pay a meaningful dividend and should not be held primarily for 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)). Plug Power Inc. (PLUG) carries a higher beta of 2. 57 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (CLNE: -26. 9%, PLUG: +62. 2%), 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.

These companies operate in different sectors (ENS (Industrials) and AMTX (Energy) and CLNE (Energy) and PLUG (Industrials) and BE (Industrials)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: ENS is a small-cap quality compounder stock; AMTX is a small-cap quality compounder stock; CLNE is a small-cap quality compounder stock; PLUG is a small-cap quality compounder stock; BE is a mid-cap high-growth stock. 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.