Southwest Gas (SWX) - Market capitalization

Market cap: $5.76 Billion USD

As of December 2025 Southwest Gas has a market cap of $5.76 Billion USD. This makes Southwest Gas the world's 2818th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.

Market cap history of Southwest Gas from 1996 to 2025

End of year Market Cap

Year	Marketcap	Change
2025	$5.76 B	14.14%
2024	$5.04 B	11.4%
2023	$4.53 B	9.17%
2022	$4.15 B	-1.89%
2021	$4.22 B	22.52%
2020	$3.45 B	-17.38%
2019	$4.17 B	3.02%
2018	$4.05 B	4.81%
2017	$3.87 B	6.38%
2016	$3.63 B	39.21%
2015	$2.61 B	-9.12%
2014	$2.87 B	10.95%
2013	$2.59 B	32.43%
2012	$1.95 B	0.33%
2011	$1.95 B	16.66%
2010	$1.67 B	29.98%
2009	$1.28 B	16.16%
2008	$1.10 B	-13.09%
2007	$1.27 B	-20.49%
2006	$1.60 B	54.37%
2005	$1.03 B	11.09%
2004	$0.93 B	21.61%
2003	$0.76 B	-1.55%
2002	$0.78 B	7.49%
2001	$0.72 B	4.69%
2000	$0.69 B	-2.67%
1999	$0.71 B	-12.8%
1998	$0.81 B	59.68%
1997	$0.51 B	-0.54%
1996	$0.51 B

End of Day market cap according to different sources

On Dec 10th, 2025 the market cap of Southwest Gas was reported to be:

$5.75 Billion USD

by Nasdaq

$5.76 Billion USD

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
NW Natural NWN	$1.91 B	-66.75%	🇺🇸 USA
Atmos Energy ATO	$26.97 B	368.16%	🇺🇸 USA
Sempra Energy SRE	$58.13 B	909.10%	🇺🇸 USA
Oneok OKE	$46.46 B	706.52%	🇺🇸 USA
National Fuel Gas NFG	$7.41 B	28.68%	🇺🇸 USA
CenterPoint Energy CNP	$24.46 B	324.74%	🇺🇸 USA

What is the market capitalization of a company?

The market capitalization sometimes referred as Marketcap, is the value of a publicly listed company.
In most cases it can be easily calculated by multiplying the share price with the amount of outstanding shares.

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Market capitalization of Southwest Gas (SWX)

Market cap: $5.76 Billion USD