Comprehensive Stock Comparison
Compare Energy Vault Holdings, Inc. (NRGV) vs AXIA Energia S.A. (AXIA) Stock
Analyze side-by-side fundamentals, valuation, growth, and profitability to decide which stock is the better buy.
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Quick Verdict
| Category | Winner | Why |
|---|---|---|
| Growth | AXIA | 0.2% revenue growth vs NRGV's -86.5% |
| Quality / Margins | AXIA | -1.8% net margin vs NRGV's -172.6% |
| Stability / Safety | NRGV | Lower D/E ratio (1.1% vs 64.1%) |
| Dividends | AXIA | 0.2% yield; 1-year raise streak; NRGV pays no meaningful dividend |
| Momentum (1Y) | NRGV | +120.6% vs AXIA's +26.0% |
| Efficiency (ROA) | AXIA | -0.2% ROA vs NRGV's -51.3%, ROIC 1.2% vs -90.2% |
Who Each Stock Is For
Growth exposure
Long-term compounding (10Y)
Sleep-well-at-night portfolio
Defensive / Recession hedge
Business Model
What each company does and how it makes money
Energy Vault develops gravity-based energy storage systems that use custom bricks and cranes to store and release electricity. The company makes money primarily through selling its EVx gravity storage platforms and related software solutions to utilities and large energy users. Its key advantage is proprietary gravity storage technology that offers longer duration storage—up to 24 hours—compared to lithium-ion batteries, using low-cost materials like soil and waste materials.
AXIA Energia is a Brazilian electric utility that generates, transmits, and sells electricity across Brazil. It earns revenue primarily from electricity sales to distributors and large consumers — with generation contributing roughly 70% and transmission about 30% of total revenue. The company's key advantage is its massive hydroelectric portfolio — Brazil's largest — which provides low-cost, renewable baseload power and significant operational scale.
Revenue Breakdown by Segment
How each company's revenue is distributed across its business units
Segment breakdown not available.
Financial Metrics Comparison
Side-by-side fundamentals across 2 stocks. BestLagging
Financial Scorecard
AXIA leads in 4 of 6 categories (Financial Metrics, Profitability & Efficiency). NRGV leads in 1 (Valuation Metrics).
Financial Metrics (TTM)
AXIA is the larger business by revenue, generating $26.1B annually — 311.0x NRGV's $84M. AXIA is the more profitable business, keeping -1.8% of every revenue dollar as net income compared to NRGV's -172.6%. On growth, NRGV holds the edge at +26.8% YoY revenue growth, suggesting stronger near-term business momentum.
| Metric | NRGVEnergy Vault Hold… | AXIAAXIA Energia S.A. |
|---|---|---|
| RevenueTrailing 12 months | $84M | $26.1B |
| EBITDAEarnings before interest/tax | -$115M | $5.9B |
| Net IncomeAfter-tax profit | -$145M | -$479M |
| Free Cash FlowCash after capex | -$75M | $1.7B |
| Gross MarginGross profit ÷ Revenue | +22.7% | +50.7% |
| Operating MarginEBIT ÷ Revenue | -139.6% | +19.7% |
| Net MarginNet income ÷ Revenue | -172.6% | -1.8% |
| FCF MarginFCF ÷ Revenue | -89.6% | +6.3% |
| Rev. Growth (YoY)Latest quarter vs prior year | +26.8% | -83.4% |
| EPS Growth (YoY)Latest quarter vs prior year | +11.1% | -114.1% |
Valuation Metrics
| Metric | NRGVEnergy Vault Hold… | AXIAAXIA Energia S.A. |
|---|---|---|
| Market CapShares × price | $460M | $23.9B |
| Enterprise ValueMkt cap + debt − cash | $434M | $33.9B |
| Trailing P/EPrice ÷ TTM EPS | -3.30x | 74.24x |
| Forward P/EPrice ÷ next-FY EPS est. | — | 1.34x |
| PEG RatioP/E ÷ EPS growth rate | — | 1.83x |
| EV / EBITDAEnterprise value multiple | — | 52.85x |
| Price / SalesMarket cap ÷ Revenue | 9.95x | 16.53x |
| Price / BookPrice ÷ Book value/share | 3.56x | 1.01x |
| Price / FCFMarket cap ÷ FCF | — | 178.31x |
Profitability & Efficiency
AXIA delivers a -0.4% return on equity — every $100 of shareholder capital generates $-0 in annual profit, vs $-180 for NRGV. NRGV carries lower financial leverage with a 0.01x debt-to-equity ratio, signaling a more conservative balance sheet compared to AXIA's 0.64x. On the Piotroski fundamental quality scale (0–9), AXIA scores 6/9 vs NRGV's 2/9, reflecting solid financial health.
| Metric | NRGVEnergy Vault Hold… | AXIAAXIA Energia S.A. |
|---|---|---|
| ROE (TTM)Return on equity | -179.7% | -0.4% |
| ROA (TTM)Return on assets | -51.3% | -0.2% |
| ROICReturn on invested capital | -90.2% | +1.2% |
| ROCEReturn on capital employed | -72.6% | +1.0% |
| Piotroski ScoreFundamental quality 0–9 | 2 | 6 |
| Debt / EquityFinancial leverage | 0.01x | 0.64x |
| Net DebtTotal debt minus cash | -$26M | $51.7B |
| Cash & Equiv.Liquid assets | $27M | $26.6B |
| Total DebtShort + long-term debt | $1M | $78.2B |
| Interest CoverageEBIT ÷ Interest expense | -1056.88x | 1.41x |
Total Returns (with DRIP)
A $10,000 investment in AXIA five years ago would be worth $13,122 today (with dividends reinvested), compared to $3,109 for NRGV. Over the past 12 months, NRGV leads with a +120.6% total return vs AXIA's +26.0%. The 3-year compound annual growth rate (CAGR) favors AXIA at 8.7% vs NRGV's -3.5% — a key indicator of consistent wealth creation.
| Metric | NRGVEnergy Vault Hold… | AXIAAXIA Energia S.A. |
|---|---|---|
| YTD ReturnYear-to-date | -38.7% | +30.6% |
| 1-Year ReturnPast 12 months | +120.6% | +26.0% |
| 3-Year ReturnCumulative with dividends | -10.2% | +28.3% |
| 5-Year ReturnCumulative with dividends | -68.9% | +31.2% |
| 10-Year ReturnCumulative with dividends | -68.9% | -92.7% |
| CAGR (3Y)Annualised 3-year return | -3.5% | +8.7% |
Risk & Volatility
AXIA currently trades 95.4% from its 52-week high vs NRGV's 47.2% drawdown — a narrower gap to the peak suggests stronger recent price momentum.
| Metric | NRGVEnergy Vault Hold… | AXIAAXIA Energia S.A. |
|---|---|---|
| Beta (5Y)Sensitivity to S&P 500 | 2.17x | — |
| 52-Week HighHighest price in past year | $6.35 | $12.66 |
| 52-Week LowLowest price in past year | $0.60 | $7.06 |
| % of 52W HighCurrent price vs 52-week peak | +47.2% | +95.4% |
| RSI (14)Momentum oscillator 0–100 | 39.4 | 67.4 |
| Avg Volume (50D)Average daily shares traded | 3.0M | 1.6M |
Analyst Outlook
Wall Street rates NRGV as "Buy" and AXIA as "Buy". AXIA is the only dividend payer here at 0.17% yield — a key consideration for income-focused portfolios.
| Metric | NRGVEnergy Vault Hold… | AXIAAXIA Energia S.A. |
|---|---|---|
| Analyst RatingConsensus buy/hold/sell | Buy | Buy |
| Price TargetConsensus 12-month target | $2.75 | — |
| # AnalystsCovering analysts | 7 | 5 |
| Dividend YieldAnnual dividend ÷ price | — | +0.2% |
| Dividend StreakConsecutive years of raises | — | 1 |
| Dividend / ShareAnnual DPS | — | $0.11 |
| Buyback YieldShare repurchases ÷ mkt cap | +0.1% | +0.0% |
Historical Charts
Charts are rendered on first load. Hover for details.
Chart 1Revenue Growth — 10 Years
| Stock | 2015 | 2024 | Change |
|---|---|---|---|
| Energy Vault Holdin… (NRGV) | $0.00 | $46M | — |
| AXIA Energia S.A. (AXIA) | $8.1B | $7.5B | -8.3% |
AXIA Energia S.A.'s revenue grew from $8.1B (2015) to $7.5B (2024) — a -1.0% CAGR.
Chart 2Net Margin Trend — 10 Years
| Stock | 2015 | 2024 | Change |
|---|---|---|---|
| Energy Vault Holdin… (NRGV) | -53.7% | -2.9% | +94.5% |
| AXIA Energia S.A. (AXIA) | -53.2% | 25.8% | +148.5% |
AXIA Energia S.A.'s net margin went from -53% (2015) to 26% (2024).
Chart 3P/E Ratio History — 7 Years
| Stock | 2018 | 2024 | Change |
|---|---|---|---|
| AXIA Energia S.A. (AXIA) | 6.5 | 20.7 | +218.5% |
AXIA Energia S.A. has traded in a 7x–26x P/E range over 7 years; current trailing P/E is ~74x.
Chart 4EPS Growth — 10 Years
| Stock | 2015 | 2024 | Change |
|---|---|---|---|
| Energy Vault Holdin… (NRGV) | -8.23 | -0.91 | +88.9% |
| AXIA Energia S.A. (AXIA) | -3.2 | 0.84 | +126.3% |
AXIA Energia S.A.'s EPS grew from $-3.20 (2015) to $0.84 (2024).
Chart 5Free Cash Flow — 5 Years
Energy Vault Holdings, Inc. generated $-115M FCF in 2024 (-394% vs 2021). AXIA Energia S.A. generated $691M FCF in 2024 (-53% vs 2021).
NRGV vs AXIA: Frequently Asked Questions
7 questions · data-driven answers · updated daily
01Is NRGV or AXIA a better buy right now?
AXIA Energia S.A. (AXIA) offers the better valuation at 74.2x trailing P/E (1.3x 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.
02Which is the better long-term investment — NRGV or AXIA?
Over the past 5 years, AXIA Energia S.A. (AXIA) delivered a total return of +31.2%, compared to -68.9% for Energy Vault Holdings, Inc. (NRGV). A $10,000 investment in AXIA five years ago would be worth approximately $13K today (assuming dividends reinvested). Over 10 years, the gap is even starker: NRGV returned -68.9% versus AXIA's -92.7%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.
03Which is safer — NRGV or AXIA?
On balance sheet safety, Energy Vault Holdings, Inc. (NRGV) carries a lower debt/equity ratio of 1% versus 64% for AXIA Energia S.A. — giving it more financial flexibility in a downturn.
04Which has better profit margins — NRGV or AXIA?
AXIA Energia S.A. (AXIA) is the more profitable company, earning 25.8% net margin versus -293.8% for Energy Vault Holdings, Inc. — meaning it keeps 25.8% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: AXIA leads at 34.5% versus -281.4% for NRGV. At the gross margin level — before operating expenses — AXIA leads at 44.2%, 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.
05Which pays a better dividend — NRGV or AXIA?
In this comparison, AXIA (0.2% yield) pays a dividend. NRGV does not pay a meaningful dividend and should not be held primarily for income.
06Is NRGV or AXIA better for a retirement portfolio?
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. Both have compounded well over 10 years (NRGV: -68.9%, AXIA: -92.7%), 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.
07What are the main differences between NRGV and AXIA?
Both stocks operate in the Utilities sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both. 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.
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