Oneok (OKE) - Market capitalization

Market cap: NZ$81.84 Billion

As of December 2025 Oneok has a market cap of NZ$81.84 Billion. This makes Oneok the world's 488th 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 Oneok from 1996 to 2025

End of year Market Cap

Year	Marketcap	Change
2025	NZ$81.84 B	-21.65%
2024	NZ$104.45 B	61.48%
2023	NZ$64.68 B	39.86%
2022	NZ$46.25 B	20.56%
2021	NZ$38.36 B	62.29%
2020	NZ$23.63 B	-49.09%
2019	NZ$46.43 B	40.28%
2018	NZ$33.09 B	14.7%
2017	NZ$28.85 B	65.39%
2016	NZ$17.44 B	130.89%
2015	NZ$7.55 B	-42.92%
2014	NZ$13.23 B	-15.33%
2013	NZ$15.63 B	46.8%
2012	NZ$10.64 B	-6.9%
2011	NZ$11.43 B	48.95%
2010	NZ$7.68 B	18.18%
2009	NZ$6.49 B	23.53%
2008	NZ$5.26 B	-13.44%
2007	NZ$6.07 B	-10.28%
2006	NZ$6.77 B	78.05%
2005	NZ$3.80 B	-8.24%
2004	NZ$4.14 B	28.24%
2003	NZ$3.23 B	18.13%
2002	NZ$2.73 B	6.18%
2001	NZ$2.57 B	-19.78%
2000	NZ$3.21 B	126.13%
1999	NZ$1.42 B	-34.27%
1998	NZ$2.16 B	-0.59%
1997	NZ$2.17 B	87.54%
1996	NZ$1.15 B

End of Day market cap according to different sources

On Dec 9th, 2025 the market cap of Oneok was reported to be:

NZ$81.79 Billion

by Nasdaq

NZ$81.84 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Atmos Energy ATO	NZ$46.61 B	-43.05%	🇺🇸 USA
Sempra Energy SRE	NZ$99.93 B	22.11%	🇺🇸 USA
National Fuel Gas NFG	NZ$12.83 B	-84.32%	🇺🇸 USA
Western Midstream WES	NZ$27.48 B	-66.41%	🇺🇸 USA
Sea Limited SE	NZ$132.05 B	61.35%	🇸🇬 Singapore
UGI Corporation UGI	NZ$14.06 B	-82.81%	🇺🇸 USA
Southwest Gas SWX	NZ$10.01 B	-87.77%	🇺🇸 USA
EQT Corporation EQT	NZ$63.31 B	-22.64%	🇺🇸 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 Oneok (OKE)

Market cap: NZ$81.84 Billion