MNTK vs CGBD vs ARCC vs OPAL

For growth investors, Ares Capital Corporation (ARCC) is the stronger pick with 32.

9% revenue growth year-over-year, versus -2. 9% for Carlyle Secured Lending, Inc. (CGBD). Carlyle Secured Lending, Inc. (CGBD) offers the better valuation at 7. 5x trailing P/E (8. 1x forward), making it the more compelling value choice. Analysts rate Ares Capital Corporation (ARCC) a "Buy" — based on 32 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, Carlyle Secured Lending, Inc.

(CGBD) is the cheapest at 7. 5x versus Montauk Renewables, Inc. at 116. 4x. On forward P/E, Carlyle Secured Lending, Inc. is actually cheaper at 8. 1x. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: Carlyle Secured Lending, Inc. wins at 0. 89x versus Ares Capital Corporation's 0. 96x — a PEG below 1. 0 traditionally signals the market is underpricing earnings growth.

Over the past 5 years, Carlyle Secured Lending, Inc.

(CGBD) delivered a total return of +48. 5%, compared to -85. 1% for Montauk Renewables, Inc. (MNTK). Over 10 years, the gap is even starker: ARCC returned +139. 2% 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), Carlyle Secured Lending, Inc.

(CGBD) is the lower-risk stock at 0. 61β versus Montauk Renewables, Inc. 's 1. 82β — meaning MNTK is approximately 197% more volatile than CGBD relative to the S&P 500. On balance sheet safety, Montauk Renewables, Inc. (MNTK) carries a lower debt/equity ratio of 52% versus 112% for Ares Capital Corporation — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Ares Capital Corporation (ARCC) is pulling ahead at 32.

9% versus -2. 9% for Carlyle Secured Lending, Inc. (CGBD). On earnings-per-share growth, the picture is similar: OPAL Fuels Inc. grew EPS 638. 9% year-over-year, compared to -82. 2% for Montauk Renewables, Inc.. 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.

Carlyle Secured Lending, Inc.

(CGBD) is the more profitable company, earning 53. 0% net margin versus 1. 0% for Montauk Renewables, Inc. — meaning it keeps 53. 0% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: ARCC leads at 69. 7% versus 1. 4% for OPAL. At the gross margin level — before operating expenses — ARCC leads at 75. 7%, 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.

The PEG ratio (forward P/E divided by expected earnings growth rate) is the most precise measure of undervaluation relative to growth potential.

By this metric, Carlyle Secured Lending, Inc. (CGBD) is the more undervalued stock at a PEG of 0. 89x versus Ares Capital Corporation's 0. 96x. A PEG below 1. 0 is traditionally considered the threshold for growth-adjusted undervaluation. On forward earnings alone, Carlyle Secured Lending, Inc. (CGBD) trades at 8. 1x forward P/E versus 13. 1x for Montauk Renewables, Inc. — 4. 9x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for CGBD: 27. 3% to $15. 00.

In this comparison, OPAL (15.

3% yield), ARCC (2. 0% yield), CGBD (0. 2% yield) pay a dividend. MNTK does not pay a meaningful dividend and should not be held primarily for income.

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

77), 2. 0% yield, +139. 2% 10Y return). 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 (ARCC: +139. 2%, 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 CGBD (Financial Services) and ARCC (Financial Services) 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; CGBD is a small-cap deep-value stock; ARCC is a mid-cap high-growth stock; OPAL is a small-cap high-growth stock. ARCC, OPAL pay a dividend while MNTK, CGBD 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.