AIRJ vs CLNE vs PLUG vs FCEL

For growth investors, FuelCell Energy, Inc.

(FCEL) is the stronger pick with 41. 0% revenue growth year-over-year, versus 2. 2% for Clean Energy Fuels Corp. (CLNE). AirJoule Technologies Corporation (AIRJ) offers the better valuation at 0. 9x trailing P/E, making it the more compelling value choice. Analysts rate AirJoule Technologies Corporation (AIRJ) a "Buy" — based on 1 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, AirJoule Technologies Corporation (AIRJ) delivered a total return of -64.

8%, compared to -95. 0% for FuelCell Energy, Inc. (FCEL). Over 10 years, the gap is even starker: PLUG returned +62. 2% versus FCEL's -99. 4%. 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 FuelCell Energy, Inc. 's 2. 91β — meaning FCEL is approximately 144% more volatile than CLNE relative to the S&P 500. On balance sheet safety, AirJoule Technologies Corporation (AIRJ) carries a lower debt/equity ratio of 0% versus 20% for Plug Power Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), FuelCell Energy, Inc.

(FCEL) is pulling ahead at 41. 0% versus 2. 2% for Clean Energy Fuels Corp. (CLNE). On earnings-per-share growth, the picture is similar: AirJoule Technologies Corporation grew EPS 117. 5% year-over-year, compared to -1414. 3% for FuelCell Energy, Inc.. Over a 3-year CAGR, FCEL leads at 6. 6% 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.

AirJoule Technologies Corporation (AIRJ) is the more profitable company, earning 0.

0% net margin versus -229. 8% for Plug Power Inc. — meaning it keeps 0. 0% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: PLUG leads at 38. 1% versus -76. 6% for FCEL. 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.

In this comparison, FCEL (1.

0% yield) pays a dividend. AIRJ, CLNE, PLUG 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 (AIRJ (Industrials) and CLNE (Energy) and PLUG (Industrials) and FCEL (Industrials)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: AIRJ is a small-cap deep-value stock; CLNE is a small-cap quality compounder stock; PLUG is a small-cap quality compounder stock; FCEL is a small-cap high-growth stock. FCEL pays a dividend while AIRJ, CLNE, PLUG do not, making them suitable for different income and tax situations. 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.