NGG vs. ATO
NGG (National Grid plc) and ATO (Atmos Energy Corporation) are both stocks. Both are in the Utilities sector — NGG in Utilities - Regulated Electric, ATO in Utilities - Regulated Gas. Over the past 10 years, NGG returned 7.62%/yr vs 10.80%/yr for ATO. At a 0.38 correlation, their price movements are largely independent.
Performance
NGG vs. ATO - Performance Comparison
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Returns By Period
In the year-to-date period, NGG achieves a 7.43% return, which is significantly higher than ATO's 2.31% return. Over the past 10 years, NGG has underperformed ATO with an annualized return of 7.62%, while ATO has yielded a comparatively higher 10.80% annualized return.
NGG
- 1D
- 1.93%
- 1M
- -4.05%
- YTD
- 7.43%
- 6M
- 8.75%
- 1Y
- 18.94%
- 3Y*
- 14.45%
- 5Y*
- 11.21%
- 10Y*
- 7.62%
ATO
- 1D
- -0.31%
- 1M
- -4.08%
- YTD
- 2.31%
- 6M
- 2.48%
- 1Y
- 12.91%
- 3Y*
- 16.83%
- 5Y*
- 14.55%
- 10Y*
- 10.80%
NGG vs. ATO - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
NGG National Grid plc | 7.43% | 35.88% | -1.26% | 18.82% | -12.68% | 29.02% | -0.75% | 38.53% | -13.76% | 4.94% |
ATO Atmos Energy Corporation | 2.31% | 23.07% | 23.35% | 6.17% | 9.63% | 12.75% | -12.73% | 23.14% | 10.39% | 18.41% |
Correlation
The correlation between NGG and ATO is 0.51, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.51 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.49 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.48 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.48 |
Correlation (All Time) Calculated using the full available price history since Jan 2, 2001 | 0.38 |
The correlation between NGG and ATO shifts across timeframes, from 0.38 (all time) to 0.51 (1 year), reflecting how their relationship changes across market environments.
Fundamentals
NGG:
$80.58B
ATO:
$28.46B
NGG:
£6.16
ATO:
$8.23
NGG:
9.94
ATO:
20.61
NGG:
0.26
ATO:
2.03
NGG:
1.70
ATO:
5.68
NGG:
1.55
ATO:
0.99
NGG:
£35.68B
ATO:
$4.88B
NGG:
£10.47B
ATO:
$1.61B
NGG:
£15.03B
ATO:
$2.57B
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Return for Risk
NGG vs. ATO — Risk / Return Rank
NGG
ATO
NGG vs. ATO - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for National Grid plc (NGG) and Atmos Energy Corporation (ATO). 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.
| NGG | ATO | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.04 | ||
| Sortino ratioReturn per unit of downside risk | -0.01 | ||
| Omega ratioGain probability vs. loss probability | 1.17 | 1.15 | +0.02 |
| Calmar ratioReturn relative to maximum drawdown | 1.34 | 1.03 | +0.31 |
| Martin ratioReturn relative to average drawdown | 3.49 | 2.90 | +0.59 |
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Drawdowns
NGG vs. ATO - Drawdown Comparison
The maximum NGG drawdown since its inception was -54.85%, which is greater than ATO's maximum drawdown of -51.94%. Use the drawdown chart below to compare losses from any high point for NGG and ATO.
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Drawdown Indicators
| NGG | ATO | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -54.85% | -51.94% | -2.91% |
Max Drawdown (1Y)Largest decline over 1 year | -14.15% | -12.58% | -1.57% |
Max Drawdown (3Y)Largest decline over 3 years | -20.76% | -16.87% | -3.89% |
Max Drawdown (5Y)Largest decline over 5 years | -39.20% | -19.08% | -20.12% |
Max Drawdown (10Y)Largest decline over 10 years | -39.20% | -32.91% | -6.29% |
Current DrawdownCurrent decline from peak | -11.53% | -11.31% | -0.22% |
Average DrawdownAverage peak-to-trough decline | -13.40% | -8.56% | -4.84% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 5.44% | 4.47% | +0.97% |
Volatility
NGG vs. ATO - Volatility Comparison
National Grid plc (NGG) has a higher volatility of 6.43% compared to Atmos Energy Corporation (ATO) at 4.42%. This indicates that NGG's price experiences larger fluctuations and is considered to be riskier than ATO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| NGG | ATO | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 6.43% | 4.42% | +2.01% |
Volatility (6M)Calculated over the trailing 6-month period | 17.55% | 11.00% | +6.55% |
Volatility (1Y)Calculated over the trailing 1-year period | 21.75% | 15.46% | +6.29% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 22.14% | 18.56% | +3.58% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 23.12% | 21.25% | +1.87% |
Dividends
NGG vs. ATO - Dividend Comparison
NGG's dividend yield for the trailing twelve months is around 4.00%, more than ATO's 2.28% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
ATO Atmos Energy Corporation | 2.28% | 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 | 4.00% | 4.03% | 11.81% | 5.20% | 5.18% | 4.75% | 5.32% | 4.94% | 6.51% | 14.95% | 5.07% | 4.73% |
Financials
NGG vs. ATO - Financials Comparison
This section allows you to compare key financial metrics between National Grid plc and Atmos Energy Corporation. 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
NGG vs. ATO - Profitability Comparison
NGG - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 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 - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 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 - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 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 - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 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 - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, National Grid plc reported a net income of 2.66B and revenue of 10.78B, resulting in a net margin of 24.7%.
ATO - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Atmos Energy Corporation reported a net income of 581.90M and revenue of 1.96B, resulting in a net margin of 29.7%.
Frequently Asked Questions
NGG and ATO have a correlation of 0.51, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
NGG has higher volatility (6.43%) compared to ATO (4.42%). In terms of maximum drawdown, NGG dropped -54.85% vs ATO's -51.94%.
NGG currently has the higher Sharpe Ratio (0.88 vs 0.84), 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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