STEM vs NRGV

For growth investors, Energy Vault Holdings, Inc.

(NRGV) is the stronger pick with 340. 9% revenue growth year-over-year, versus 8. 1% for Stem, Inc. (STEM). 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, Energy Vault Holdings, Inc.

(NRGV) delivered a total return of -48. 6%, compared to -97. 6% for Stem, Inc. (STEM). Over 10 years, the gap is even starker: NRGV returned -47. 9% versus STEM's -94. 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), Energy Vault Holdings, Inc.

(NRGV) is the lower-risk stock at 3. 08β versus Stem, Inc. 's 3. 66β — meaning STEM is approximately 19% more volatile than NRGV relative to the S&P 500.

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

(NRGV) is pulling ahead at 340. 9% versus 8. 1% for Stem, Inc. (STEM). On earnings-per-share growth, the picture is similar: Stem, Inc. grew EPS 91. 3% year-over-year, compared to 28. 6% for Energy Vault Holdings, Inc.. Over a 3-year CAGR, NRGV leads at 11. 8% 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: NRGV leads at -36. 5% versus -38. 7% for STEM. At the gross margin level — before operating expenses — STEM leads at 38. 4%, 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, Energy Vault Holdings, Inc.

(NRGV) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding. 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 (NRGV: -47. 9%, STEM: -94. 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 (STEM (Technology) and NRGV (Utilities)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

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