SR vs. ATO

Last updated Apr 1, 2026

Compare and contrast key facts about Spire Inc. (SR) and Atmos Energy Corporation (ATO).

Performance

SR vs. ATO - Performance Comparison

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

SR vs. ATO - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SR Spire Inc.	10.48%	27.08%	14.12%	-5.26%	9.81%	5.86%	-20.18%	15.81%	1.74%	19.88%
ATO Atmos Energy Corporation	10.81%	23.07%	23.35%	6.17%	9.63%	12.75%	-12.73%	23.14%	10.39%	18.41%

Fundamentals

Market Cap SR : $5.36B ATO : $30.45B
EPS SR : $4.83 ATO : $7.71
PE Ratio SR : 18.75 ATO : 23.97
PS Ratio SR : 2.08 ATO : 6.15
PB Ratio SR : 1.68 ATO : 1.08
Total Revenue (TTM) SR : $2.57B ATO : $4.87B
Gross Profit (TTM) SR : $1.46B ATO : $1.73B
EBITDA (TTM) SR : $872.20M ATO : $2.45B

Returns By Period

The year-to-date returns for both investments are quite close, with SR having a 10.48% return and ATO slightly higher at 10.81%. Over the past 10 years, SR has underperformed ATO with an annualized return of 6.79%, while ATO has yielded a comparatively higher 12.12% annualized return.

SR

• 1D: -0.94%
• 1M: -0.26%
• YTD: 10.48%
• 6M: 13.22%
• 1Y: 20.44%
• 3Y*: 13.82%
• 5Y*: 8.83%
• 10Y*: 6.79%

ATO

• 1D: -0.16%
• 1M: -1.11%
• YTD: 10.81%
• 6M: 9.41%
• 1Y: 22.16%
• 3Y*: 20.97%
• 5Y*: 16.33%
• 10Y*: 12.12%

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

Return for Risk

SR vs. ATO — Risk / Return Rank

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

SR

SR Risk / Return Rank: 74
SR Sharpe Ratio Rank: 78
SR Sortino Ratio Rank: 69
SR Omega Ratio Rank: 68
SR Calmar Ratio Rank: 78
SR Martin Ratio Rank: 75

ATO

ATO Risk / Return Rank: 81
ATO Sharpe Ratio Rank: 83
ATO Sortino Ratio Rank: 77
ATO Omega Ratio Rank: 77
ATO Calmar Ratio Rank: 88
ATO Martin Ratio Rank: 83

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.

SR vs. ATO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Spire Inc. (SR) 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.

	SR	ATO	Difference
Sharpe ratio Return per unit of total volatility	1.13	1.39	-0.26
Sortino ratio Return per unit of downside risk	1.54	1.88	-0.34
Omega ratio Gain probability vs. loss probability	1.20	1.26	-0.05
Calmar ratio Return relative to maximum drawdown	2.02	3.31	-1.30
Martin ratio Return relative to average drawdown	4.35	6.69	-2.34
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SR vs. ATO - Sharpe Ratio Comparison

The current SR Sharpe Ratio is 1.13, which is comparable to the ATO Sharpe Ratio of 1.39. The chart below compares the historical Sharpe Ratios of SR and ATO, 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

	SR	ATO	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.13	1.39	-0.26
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.42	0.89	-0.47
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.28	0.57	-0.29
Sharpe Ratio (All Time) Calculated using the full available price history	0.45	0.53	-0.08

Correlation

The correlation between SR and ATO is 0.45, which is considered to be moderate. This suggests that the two assets have some degree of positive relationship in their price movements. Moderate correlation can be acceptable for portfolio diversification, offering a balance between risk and potential returns.

Dividends

SR vs. ATO - Dividend Comparison

SR's dividend yield for the trailing twelve months is around 3.56%, more than ATO's 2.02% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
SR Spire Inc.	3.56%	3.85%	4.50%	4.68%	4.03%	4.04%	3.93%	2.88%	3.08%	2.84%	3.09%	3.15%
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%

Drawdowns

SR vs. ATO - Drawdown Comparison

The maximum SR drawdown since its inception was -45.00%, smaller than the maximum ATO drawdown of -51.94%. Use the drawdown chart below to compare losses from any high point for SR and ATO.

Drawdown Indicators

	SR	ATO	Difference
Max Drawdown Largest peak-to-trough decline	-45.00%	-51.94%	+6.94%
Max Drawdown (1Y) Largest decline over 1 year	-10.17%	-7.20%	-2.97%
Max Drawdown (5Y) Largest decline over 5 years	-26.05%	-19.08%	-6.97%
Max Drawdown (10Y) Largest decline over 10 years	-39.53%	-32.91%	-6.62%
Current Drawdown Current decline from peak	-2.39%	-2.05%	-0.34%
Average Drawdown Average peak-to-trough decline	-9.49%	-8.58%	-0.91%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.71%	3.57%	+1.14%

Volatility

SR vs. ATO - Volatility Comparison

Spire Inc. (SR) has a higher volatility of 5.43% compared to Atmos Energy Corporation (ATO) at 3.83%. This indicates that SR'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.

Volatility by Period

	SR	ATO	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.43%	3.83%	+1.60%
Volatility (6M) Calculated over the trailing 6-month period	12.40%	10.28%	+2.12%
Volatility (1Y) Calculated over the trailing 1-year period	18.13%	16.01%	+2.12%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.32%	18.47%	+2.85%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	24.29%	21.21%	+3.08%

Financials

SR vs. ATO - Profitability Comparison

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

SR - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Apr 2026, Spire Inc. reported a gross profit of 622.30M and revenue of 762.20M. Therefore, the gross margin over that period was 81.7%.

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%.

SR - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Apr 2026, Spire Inc. reported an operating income of 173.50M and revenue of 762.20M, resulting in an operating margin of 22.8%.

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%.

SR - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Apr 2026, Spire Inc. reported a net income of 95.00M and revenue of 762.20M, resulting in a net margin of 12.5%.

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%.