MNTK vs CLNE vs UGI vs OPAL

For growth investors, OPAL Fuels Inc.

(OPAL) is the stronger pick with 16. 3% revenue growth year-over-year, versus 0. 4% for Montauk Renewables, Inc. (MNTK). UGI Corporation (UGI) offers the better valuation at 10. 5x trailing P/E (10. 6x 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.

On trailing P/E, UGI Corporation (UGI) is the cheapest at 10.

5x versus Montauk Renewables, Inc. at 116. 4x. On forward P/E, UGI Corporation is actually cheaper at 10. 6x.

Over the past 5 years, UGI Corporation (UGI) delivered a total return of -13.

1%, compared to -85. 1% for Montauk Renewables, Inc. (MNTK). Over 10 years, the gap is even starker: UGI returned +9. 6% versus MNTK's -87. 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), UGI Corporation (UGI) is the lower-risk stock at 0.

27β versus Montauk Renewables, Inc. 's 1. 82β — meaning MNTK is approximately 585% more volatile than UGI relative to the S&P 500. On balance sheet safety, Clean Energy Fuels Corp. (CLNE) carries a lower debt/equity ratio of 18% versus 158% for UGI Corporation — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), OPAL Fuels Inc.

(OPAL) is pulling ahead at 16. 3% versus 0. 4% for Montauk Renewables, Inc. (MNTK). On earnings-per-share growth, the picture is similar: OPAL Fuels Inc. grew EPS 638. 9% year-over-year, compared to -173. 0% for Clean Energy Fuels Corp.. Over a 3-year CAGR, OPAL leads at 14. 0% 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.

UGI Corporation (UGI) is the more profitable company, earning 9.

3% net margin versus -52. 3% for Clean Energy Fuels Corp. — meaning it keeps 9. 3% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: UGI leads at 15. 2% versus -22. 1% for CLNE. At the gross margin level — before operating expenses — UGI leads at 49. 9%, 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, UGI Corporation (UGI) trades at 10.

6x forward P/E versus 13. 1x for Montauk Renewables, Inc. — 2. 4x 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, OPAL (15.

3% yield), UGI (4. 5% yield) pay a dividend. MNTK, CLNE do not pay a meaningful dividend and should not be held primarily for income.

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

27), 4. 5% yield). Montauk Renewables, Inc. (MNTK) carries a higher beta of 1. 82 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (UGI: +9. 6%, MNTK: -87. 9%), 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 (MNTK (Utilities) and CLNE (Energy) and UGI (Utilities) and OPAL (Utilities)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: MNTK is a small-cap quality compounder stock; CLNE is a small-cap quality compounder stock; UGI is a small-cap deep-value stock; OPAL is a small-cap high-growth stock. UGI, OPAL pay a dividend while MNTK, CLNE 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.