Southwest Gas (SWX) - Market capitalization

Market cap: NZ$9.88 Billion

As of December 2025 Southwest Gas has a market cap of NZ$9.88 Billion. This makes Southwest Gas the world's 2848th 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	NZ$9.88 B	10.41%
2024	NZ$8.94 B	24.91%
2023	NZ$7.16 B	9.6%
2022	NZ$6.53 B	5.55%
2021	NZ$6.19 B	29.43%
2020	NZ$4.78 B	-22.89%
2019	NZ$6.20 B	2.6%
2018	NZ$6.04 B	10.97%
2017	NZ$5.44 B	3.76%
2016	NZ$5.25 B	37.55%
2015	NZ$3.81 B	4.04%
2014	NZ$3.67 B	16.37%
2013	NZ$3.15 B	32.57%
2012	NZ$2.37 B	-4.82%
2011	NZ$2.49 B	15.32%
2010	NZ$2.16 B	22.37%
2009	NZ$1.77 B	-7.19%
2008	NZ$1.90 B	14.72%
2007	NZ$1.66 B	-26.87%
2006	NZ$2.27 B	49.76%
2005	NZ$1.51 B	15.98%
2004	NZ$1.30 B	10.79%
2003	NZ$1.18 B	-20.74%
2002	NZ$1.49 B	-14.71%
2001	NZ$1.74 B	11.73%
2000	NZ$1.56 B	14.78%
1999	NZ$1.36 B	-12.07%
1998	NZ$1.55 B	75.83%
1997	NZ$0.88 B	21.08%
1996	NZ$0.72 B

End of Day market cap according to different sources

On Dec 6th, 2025 the market cap of Southwest Gas was reported to be:

NZ$9.88 Billion

by Nasdaq

NZ$9.88 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
NW Natural NWN	NZ$3.32 B	-66.38%	🇺🇸 USA
Atmos Energy ATO	NZ$47.94 B	385.20%	🇺🇸 USA
Sempra Energy SRE	NZ$102.42 B	936.60%	🇺🇸 USA
Oneok OKE	NZ$83.21 B	742.20%	🇺🇸 USA
National Fuel Gas NFG	NZ$12.79 B	29.51%	🇺🇸 USA
CenterPoint Energy CNP	NZ$43.43 B	339.53%	🇺🇸 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: NZ$9.88 Billion