BEEM vs NRGV vs AMRC vs STEM

For growth investors, Energy Vault Holdings, Inc.

(NRGV) is the stronger pick with 340. 9% revenue growth year-over-year, versus -26. 8% for Beam Global (BEEM). Ameresco, Inc. (AMRC) offers the better valuation at 35. 8x trailing P/E (25. 0x forward), making it the more compelling value choice. Analysts rate Energy Vault Holdings, Inc. (NRGV) a "Buy" — based on 7 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, Ameresco, Inc.

(AMRC) delivered a total return of -44. 0%, compared to -97. 8% for Stem, Inc. (STEM). Over 10 years, the gap is even starker: AMRC returned +542. 4% versus STEM's -95. 5%. 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), Ameresco, Inc.

(AMRC) is the lower-risk stock at 2. 03β versus Stem, Inc. 's 3. 66β — meaning STEM is approximately 80% more volatile than AMRC relative to the S&P 500. On balance sheet safety, Beam Global (BEEM) carries a lower debt/equity ratio of 5% versus 173% for Ameresco, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Energy Vault Holdings, Inc.

(NRGV) is pulling ahead at 340. 9% versus -26. 8% for Beam Global (BEEM). On earnings-per-share growth, the picture is similar: Stem, Inc. grew EPS 91. 3% year-over-year, compared to -22. 4% for Ameresco, Inc.. Over a 3-year CAGR, BEEM leads at 76. 3% 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.

Stem, Inc.

(STEM) is the more profitable company, earning 88. 2% net margin versus -50. 9% for Energy Vault Holdings, Inc. — meaning it keeps 88. 2% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: AMRC leads at 6. 5% versus -38. 7% for STEM. At the gross margin level — before operating expenses — STEM leads at 35. 3%, 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.

Analyst consensus price targets imply the most upside for STEM: 137.

2% to $20. 67.

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, Ameresco, Inc.

(AMRC) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (+542. 4% 10Y return). Stem, Inc. (STEM) carries a higher beta of 3. 66 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (AMRC: +542. 4%, STEM: -95. 5%), 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 (BEEM (Energy) and NRGV (Utilities) and AMRC (Industrials) and STEM (Technology)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: BEEM is a small-cap quality compounder stock; NRGV is a small-cap high-growth stock; AMRC is a small-cap quality compounder stock; STEM is a small-cap quality compounder stock. 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.