ATO vs. NGG

Last updated Apr 2, 2026

Compare and contrast key facts about Atmos Energy Corporation (ATO) and National Grid plc (NGG).

Performance

ATO vs. NGG - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Atmos Energy Corporation (ATO) and National Grid plc (NGG). The values are adjusted to include any dividend payments, if applicable.

ATO vs. NGG - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ATO Atmos Energy Corporation	11.27%	23.07%	23.35%	6.17%	9.63%	12.75%	-12.73%	23.14%	10.39%	18.41%
NGG National Grid plc	12.27%	35.88%	-1.26%	18.82%	-12.68%	29.02%	-0.75%	38.53%	-13.76%	4.94%

Fundamentals

Market Cap ATO : $30.58B NGG : $85.97B
EPS ATO : $7.71 NGG : $4.66
PE Ratio ATO : 24.07 NGG : 18.65
PEG Ratio ATO : 2.37 NGG : 0.51
PS Ratio ATO : 6.18 NGG : 2.37
PB Ratio ATO : 1.08 NGG : 2.31
Total Revenue (TTM) ATO : $4.87B NGG : $36.25B
Gross Profit (TTM) ATO : $1.73B NGG : $9.82B
EBITDA (TTM) ATO : $2.45B NGG : $12.97B

Returns By Period

In the year-to-date period, ATO achieves a 11.27% return, which is significantly lower than NGG's 12.27% return. Over the past 10 years, ATO has outperformed NGG with an annualized return of 12.17%, while NGG has yielded a comparatively lower 8.05% annualized return.

ATO

• 1D: 0.42%
• 1M: -0.84%
• YTD: 11.27%
• 6M: 10.75%
• 1Y: 22.38%
• 3Y*: 21.13%
• 5Y*: 16.42%
• 10Y*: 12.17%

NGG

• 1D: 2.65%
• 1M: -7.50%
• YTD: 12.27%
• 6M: 20.89%
• 1Y: 37.80%
• 3Y*: 16.66%
• 5Y*: 14.82%
• 10Y*: 8.05%

*Multi-year figures are annualized to reflect compound growth (CAGR)

Return for Risk

ATO vs. NGG — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

ATO

ATO Risk / Return Rank: 80
ATO Sharpe Ratio Rank: 82
ATO Sortino Ratio Rank: 75
ATO Omega Ratio Rank: 76
ATO Calmar Ratio Rank: 86
ATO Martin Ratio Rank: 81

NGG

NGG Risk / Return Rank: 85
NGG Sharpe Ratio Rank: 86
NGG Sortino Ratio Rank: 80
NGG Omega Ratio Rank: 83
NGG Calmar Ratio Rank: 85
NGG Martin Ratio Rank: 88

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

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.

	ATO	NGG	Difference
Sharpe ratio Return per unit of total volatility	1.41	1.68	-0.27
Sortino ratio Return per unit of downside risk	1.90	2.16	-0.27
Omega ratio Gain probability vs. loss probability	1.26	1.31	-0.06
Calmar ratio Return relative to maximum drawdown	3.15	2.98	+0.16
Martin ratio Return relative to average drawdown	6.35	9.77	-3.41
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

ATO vs. NGG - Sharpe Ratio Comparison

The current ATO Sharpe Ratio is 1.41, which is comparable to the NGG Sharpe Ratio of 1.68. The chart below compares the historical Sharpe Ratios of ATO and NGG, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	ATO	NGG	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.41	1.68	-0.27
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.89	0.69	+0.20
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.58	0.35	+0.22
Sharpe Ratio (All Time) Calculated using the full available price history	0.53	0.37	+0.16

Correlation

The correlation between ATO and NGG is 0.38, which is considered to be low. This implies their price changes are not closely related. A low correlation is generally favorable for portfolio diversification, as it helps to reduce overall risk by spreading it across multiple assets with different performance patterns.

Dividends

ATO vs. NGG - Dividend Comparison

ATO's dividend yield for the trailing twelve months is around 2.02%, less than NGG's 3.59% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ATO Atmos Energy Corporation	2.02%	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	3.59%	4.03%	11.81%	5.20%	5.18%	4.75%	5.32%	4.94%	6.51%	14.95%	5.07%	4.73%

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.

Drawdown Indicators

	ATO	NGG	Difference
Max Drawdown Largest peak-to-trough decline	-51.94%	-54.85%	+2.91%
Max Drawdown (1Y) Largest decline over 1 year	-7.20%	-12.79%	+5.59%
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 Drawdown Current decline from peak	-1.64%	-7.55%	+5.91%
Average Drawdown Average peak-to-trough decline	-8.58%	-13.44%	+4.86%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.57%	3.91%	-0.34%

Volatility

ATO vs. NGG - Volatility Comparison

The current volatility for Atmos Energy Corporation (ATO) is 3.82%, while National Grid plc (NGG) has a volatility of 7.95%. 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.

Volatility by Period

	ATO	NGG	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.82%	7.95%	-4.13%
Volatility (6M) Calculated over the trailing 6-month period	10.27%	13.39%	-3.12%
Volatility (1Y) Calculated over the trailing 1-year period	15.96%	22.64%	-6.68%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.46%	21.53%	-3.07%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.21%	22.86%	-1.65%

Financials

ATO vs. NGG - Profitability Comparison

The chart below illustrates the profitability comparison between Atmos Energy Corporation and National Grid plc over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

ATO - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Apr 2026, Atmos Energy Corporation reported a gross profit of 0.00 and revenue of 1.34B. 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 Apr 2026, National Grid plc reported a gross profit of 1.61B and revenue of 7.05B. Therefore, the gross margin over that period was 22.9%.

ATO - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Apr 2026, Atmos Energy Corporation reported an operating income of 514.76M and revenue of 1.34B, resulting in an operating margin of 38.3%.

NGG - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Apr 2026, National Grid plc reported an operating income of 1.61B and revenue of 7.05B, resulting in an operating margin of 22.9%.

ATO - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Apr 2026, Atmos Energy Corporation reported a net income of 402.96M and revenue of 1.34B, resulting in a net margin of 30.0%.

NGG - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Apr 2026, National Grid plc reported a net income of 615.54M and revenue of 7.05B, resulting in a net margin of 8.7%.