WM vs CECO vs AMRC vs RSG vs PESI

For growth investors, CECO Environmental Corp.

(CECO) is the stronger pick with 38. 8% revenue growth year-over-year, versus 3. 5% for Republic Services, Inc. (RSG). Republic Services, Inc. (RSG) offers the better valuation at 29. 2x trailing P/E (27. 6x forward), making it the more compelling value choice. Analysts rate Waste Management, Inc. (WM) a "Buy" — based on 35 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, Republic Services, Inc.

(RSG) is the cheapest at 29. 2x versus CECO Environmental Corp. at 59. 7x. On forward P/E, Waste Management, Inc. is actually cheaper at 26. 3x — notably different from the trailing picture, reflecting expected earnings growth. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: CECO Environmental Corp. wins at 1. 14x versus Waste Management, Inc. 's 1. 91x — a reasonable growth-adjusted valuation.

Over the past 5 years, CECO Environmental Corp.

(CECO) delivered a total return of +1026%, compared to -39. 3% for Ameresco, Inc. (AMRC). Over 10 years, the gap is even starker: CECO returned +1289% versus PESI's +174. 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), Waste Management, Inc.

(WM) is the lower-risk stock at -0. 21β versus Ameresco, Inc. 's 2. 03β — meaning AMRC is approximately -1076% more volatile than WM relative to the S&P 500. On balance sheet safety, Republic Services, Inc. (RSG) carries a lower debt/equity ratio of 5% versus 2% for Waste Management, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), CECO Environmental Corp.

(CECO) is pulling ahead at 38. 8% versus 3. 5% for Republic Services, Inc. (RSG). On earnings-per-share growth, the picture is similar: CECO Environmental Corp. grew EPS 280. 6% year-over-year, compared to -22. 4% for Ameresco, Inc.. Over a 3-year CAGR, CECO leads at 22. 4% 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.

Republic Services, Inc.

(RSG) is the more profitable company, earning 12. 9% net margin versus -22. 3% for Perma-Fix Environmental Services, Inc. — meaning it keeps 12. 9% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: RSG leads at 20. 0% versus -19. 0% for PESI. At the gross margin level — before operating expenses — RSG leads at 42. 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.

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, CECO Environmental Corp. (CECO) is the more undervalued stock at a PEG of 1. 14x versus Waste Management, Inc. 's 1. 91x. A PEG below 1. 5 suggests fair-to-attractive pricing relative to expected growth. On forward earnings alone, Waste Management, Inc. (WM) trades at 26. 3x forward P/E versus 49. 1x for CECO Environmental Corp. — 22. 8x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for PESI: 63. 6% to $18. 00.

In this comparison, WM (1.

5% yield), RSG (1. 2% yield) pay a dividend. CECO, AMRC, PESI do not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, Republic Services, Inc.

(RSG) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β -0. 18), 1. 2% yield, +350. 5% 10Y return). Perma-Fix Environmental Services, Inc. (PESI) carries a higher beta of 1. 74 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (RSG: +350. 5%, PESI: +174. 4%), 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.

Both stocks operate in the Industrials sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: WM is a mid-cap quality compounder stock; CECO is a small-cap high-growth stock; AMRC is a small-cap quality compounder stock; RSG is a mid-cap quality compounder stock; PESI is a small-cap quality compounder stock. WM, RSG pay a dividend while CECO, AMRC, PESI 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.