ATO vs. NGG
ATO (Atmos Energy Corporation) and NGG (National Grid plc) are both stocks. Both are in the Utilities sector — ATO in Utilities - Regulated Gas, NGG in Utilities - Regulated Electric. Over the past 10 years, ATO returned 10.70%/yr vs 6.81%/yr for NGG. Their 0.38 correlation means their historical movements had little consistent relationship.
Performance
ATO vs. NGG - Performance Comparison
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Returns By Period
In the year-to-date period, ATO achieves a 4.23% return, which is significantly lower than NGG's 6.11% return. Over the past 10 years, ATO has outperformed NGG with an annualized return of 10.70%, while NGG has yielded a comparatively lower 6.81% annualized return.
ATO
- 1D
- -0.85%
- 1M
- -2.31%
- 6M
- 5.04%
- YTD
- 4.23%
- 1Y
- 13.37%
- 3Y*
- 15.37%
- 5Y*
- 14.68%
- 10Y*
- 10.70%
- ALL TIME*
- 11.71%
NGG
- 1D
- -0.52%
- 1M
- -3.48%
- 6M
- -3.75%
- YTD
- 6.11%
- 1Y
- 15.90%
- 3Y*
- 14.50%
- 5Y*
- 11.07%
- 10Y*
- 6.81%
- ALL TIME*
- 8.33%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $158.86M | $180.86M | $248.21M | |
| $62.39M | $64.89M | $105.15M |
ATO vs. NGG - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
ATO Atmos Energy Corporation | 4.23% | 23.07% | 23.35% | 6.17% | 9.63% | 12.75% | -12.73% | 23.14% | 10.39% | 18.41% |
NGG National Grid plc | 6.11% | 35.88% | -1.26% | 18.82% | -12.68% | 29.02% | -0.75% | 38.53% | -13.76% | 4.94% |
Correlation
The correlation between ATO and NGG is 0.49, which is low. Their historical price movements had little consistent relationship.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.49 |
Correlation (3Y) Balances recent behavior with more history. | 0.48 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.48 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.48 |
Correlation (All Time) Calculated using the full available price history since Jan 2, 2001 | 0.38 |
The correlation between ATO and NGG shifts across timeframes, from 0.38 (all time) to 0.49 (1 year), reflecting how their relationship changes across market environments.
Fundamentals
ATO:
$28.84B
NGG:
$80.40B
ATO:
$8.19
NGG:
£6.16
ATO:
21.10
NGG:
9.65
ATO:
2.08
NGG:
0.25
ATO:
5.82
NGG:
1.65
ATO:
1.01
NGG:
1.50
ATO:
$4.88B
NGG:
£35.68B
ATO:
$1.61B
NGG:
£10.47B
ATO:
$2.57B
NGG:
£15.03B
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Return for Risk
ATO vs. NGG — Risk / Return Rank
ATO
NGG
ATO vs. NGG - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Atmos Energy Corporation (ATO) and National Grid plc (NGG). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| ATO | NGG | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.03 | ||
| Sortino ratioReturn per unit of downside risk | +0.03 | ||
| Omega ratioGain probability vs. loss probability | 1.15 | 1.16 | -0.01 |
| Calmar ratioReturn relative to maximum drawdown | 1.06 | 1.30 | -0.24 |
| Martin ratioReturn relative to average drawdown | 2.57 | 3.02 | -0.45 |
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Drawdowns
ATO vs. NGG - Drawdown Comparison
The maximum ATO drawdown since its inception was -51.94%, smaller than the maximum NGG drawdown of -54.85%. Use the drawdown chart below to compare losses from any high point for ATO and NGG.
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Drawdown Indicators
| ATO | NGG | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -51.94% | -54.85% | +2.91% |
Max Drawdown (1Y)Largest decline over 1 year | -12.58% | -14.15% | +1.57% |
Max Drawdown (3Y)Largest decline over 3 years | -12.69% | -20.76% | +8.07% |
Max Drawdown (5Y)Largest decline over 5 years | -19.08% | -39.20% | +20.12% |
Max Drawdown (10Y)Largest decline over 10 years | -32.91% | -39.20% | +6.29% |
Current DrawdownCurrent decline from peak | -9.64% | -12.62% | +2.98% |
Average DrawdownAverage peak-to-trough decline | -8.56% | -13.39% | +4.83% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 5.18% | 6.06% | -0.88% |
Volatility
ATO vs. NGG - Volatility Comparison
The current volatility for Atmos Energy Corporation (ATO) is 6.30%, while National Grid plc (NGG) has a volatility of 6.64%. This indicates that ATO experiences smaller price fluctuations and is considered to be less risky than NGG based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| ATO | NGG | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 6.30% | 6.64% | -0.34% |
Volatility (6M)Calculated over the trailing 6-month period | 11.93% | 18.30% | -6.37% |
Volatility (1Y)Calculated over the trailing 1-year period | 16.10% | 21.46% | -5.36% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 18.61% | 22.32% | -3.71% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 21.28% | 23.03% | -1.75% |
Dividends
ATO vs. NGG - Dividend Comparison
ATO's dividend yield for the trailing twelve months is around 2.24%, less than NGG's 4.05% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
ATO Atmos Energy Corporation | 2.24% | 2.15% | 2.36% | 2.61% | 2.48% | 2.44% | 2.46% | 1.92% | 2.14% | 2.14% | 2.31% | 2.52% |
NGG National Grid plc | 4.05% | 4.03% | 11.81% | 5.20% | 5.18% | 4.75% | 5.32% | 4.94% | 6.51% | 14.95% | 5.07% | 4.73% |
Financials
ATO vs. NGG - Financials Comparison
This section allows you to compare key financial metrics between Atmos Energy Corporation and National Grid plc. You can select fields from income statements, balance sheets, and cash flow statements to easily visualize and compare the financial health of both companies.
Total Revenue: Total amount of money received from sales and other business activities
ATO vs. NGG - Profitability Comparison
ATO - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Aug 2026, Atmos Energy Corporation reported a gross profit of 0.00 and revenue of 1.96B. Therefore, the gross margin over that period was 0.0%.
NGG - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Aug 2026, National Grid plc reported a gross profit of 4.21B and revenue of 10.78B. Therefore, the gross margin over that period was 39.0%.
ATO - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Aug 2026, Atmos Energy Corporation reported an operating income of 764.80M and revenue of 1.96B, resulting in an operating margin of 39.0%.
NGG - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Aug 2026, National Grid plc reported an operating income of 4.21B and revenue of 10.78B, resulting in an operating margin of 39.0%.
ATO - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Aug 2026, Atmos Energy Corporation reported a net income of 581.90M and revenue of 1.96B, resulting in a net margin of 29.7%.
NGG - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Aug 2026, National Grid plc reported a net income of 2.66B and revenue of 10.78B, resulting in a net margin of 24.7%.
Frequently Asked Questions
ATO and NGG have a correlation of 0.49, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
NGG has higher volatility (6.64%) compared to ATO (6.30%). In terms of maximum drawdown, ATO dropped -51.94% vs NGG's -54.85%.
NGG currently has the higher Sharpe Ratio (0.85 vs 0.83), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
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