ESGL vs AQMS vs ECVT vs CLH vs PESI

For growth investors, Perma-Fix Environmental Services, Inc.

(PESI) is the stronger pick with 4. 3% revenue growth year-over-year, versus -1. 0% for ESGL Holdings Limited (ESGL). Clean Harbors, Inc. (CLH) offers the better valuation at 40. 0x trailing P/E (34. 5x forward), making it the more compelling value choice. Analysts rate Ecovyst Inc. (ECVT) a "Buy" — based on 6 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, Ecovyst Inc.

is actually cheaper at 21. 8x — notably different from the trailing picture, reflecting expected earnings growth.

Over the past 5 years, Clean Harbors, Inc.

(CLH) delivered a total return of +210. 4%, compared to -99. 0% for Aqua Metals, Inc. (AQMS). Over 10 years, the gap is even starker: CLH returned +515. 7% versus AQMS's -99. 7%. 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), ESGL Holdings Limited (ESGL) is the lower-risk stock at 0.

42β versus Aqua Metals, Inc. 's 2. 30β — meaning AQMS is approximately 450% more volatile than ESGL relative to the S&P 500. On balance sheet safety, Aqua Metals, Inc. (AQMS) carries a lower debt/equity ratio of 4% versus 126% for Clean Harbors, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Perma-Fix Environmental Services, Inc.

(PESI) is pulling ahead at 4. 3% versus -1. 0% for ESGL Holdings Limited (ESGL). On earnings-per-share growth, the picture is similar: ESGL Holdings Limited grew EPS 98. 7% year-over-year, compared to -916. 7% for Ecovyst Inc.. Over a 3-year CAGR, ESGL leads at 15. 5% 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.

Clean Harbors, Inc.

(CLH) is the more profitable company, earning 6. 5% net margin versus -22. 3% for Perma-Fix Environmental Services, Inc. — meaning it keeps 6. 5% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: CLH leads at 11. 2% versus -19. 0% for PESI. At the gross margin level — before operating expenses — ESGL leads at 93. 0%, 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, Ecovyst Inc.

(ECVT) trades at 21. 8x forward P/E versus 34. 5x for Clean Harbors, Inc. — 12. 7x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for PESI: 63. 6% to $18. 00.

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 Harbors, Inc.

(CLH) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 64), +515. 7% 10Y return). Aqua Metals, Inc. (AQMS) carries a higher beta of 2. 30 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (CLH: +515. 7%, AQMS: -99. 7%), 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 (ESGL (Industrials) and AQMS (Industrials) and ECVT (Basic Materials) and CLH (Industrials) and PESI (Industrials)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

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.