WPRT vs PESI

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

(PESI) is the stronger pick with 4. 3% revenue growth year-over-year, versus -8. 9% for Westport Fuel Systems Inc. (WPRT). Analysts rate Perma-Fix Environmental Services, Inc. (PESI) a "Hold" — 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, Perma-Fix Environmental Services, Inc.

(PESI) delivered a total return of +45. 6%, compared to -96. 9% for Westport Fuel Systems Inc. (WPRT). Over 10 years, the gap is even starker: PESI returned +178. 6% versus WPRT's -91. 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), Westport Fuel Systems Inc.

(WPRT) is the lower-risk stock at 0. 88β versus Perma-Fix Environmental Services, Inc. 's 1. 85β — meaning PESI is approximately 109% more volatile than WPRT relative to the S&P 500. On balance sheet safety, Perma-Fix Environmental Services, Inc. (PESI) carries a lower debt/equity ratio of 9% versus 39% for Westport Fuel Systems 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 -8. 9% for Westport Fuel Systems Inc. (WPRT). On earnings-per-share growth, the picture is similar: Westport Fuel Systems Inc. grew EPS 56. 9% year-over-year, compared to 43. 6% for Perma-Fix Environmental Services, Inc.. Over a 3-year CAGR, WPRT leads at -1. 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.

Westport Fuel Systems Inc.

(WPRT) is the more profitable company, earning -7. 2% net margin versus -22. 3% for Perma-Fix Environmental Services, Inc. — meaning it keeps -7. 2% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: WPRT leads at -8. 2% versus -19. 0% for PESI. At the gross margin level — before operating expenses — WPRT leads at 19. 1%, 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.

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, Westport Fuel Systems Inc.

(WPRT) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 88)). Perma-Fix Environmental Services, Inc. (PESI) carries a higher beta of 1. 85 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (WPRT: -91. 9%, PESI: +178. 6%), 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 (WPRT (Consumer Cyclical) 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.