Oneok (OKE) - Market capitalization

Market cap: A$81.43 Billion

As of August 2026 Oneok has a market cap of A$81.43 Billion. This makes Oneok the world's 438th 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 2026

End of year Market Cap

Year	Marketcap	Change
2026	A$81.43 B	18.9%
2025	A$68.49 B	-27.68%
2024	A$94.71 B	57.74%
2023	A$60.04 B	39.14%
2022	A$43.15 B	19.39%
2021	A$36.14 B	62.94%
2020	A$22.18 B	-50.34%
2019	A$44.66 B	41.71%
2018	A$31.51 B	20.05%
2017	A$26.25 B	56.57%
2016	A$16.76 B	136.17%
2015	A$7.09 B	-43.98%
2014	A$12.67 B	-12.01%
2013	A$14.40 B	70.85%
2012	A$8.43 B	-3.18%
2011	A$8.70 B	49.28%
2010	A$5.83 B	11.01%
2009	A$5.25 B	21.42%
2008	A$4.32 B	-18.73%
2007	A$5.32 B	-12.04%
2006	A$6.05 B	70.34%
2005	A$3.55 B	-7.04%
2004	A$3.82 B	35.21%
2003	A$2.82 B	11.22%
2002	A$2.54 B	21.22%
2001	A$2.09 B	-17.64%
2000	A$2.54 B	125.37%
1999	A$1.13 B	-39.26%
1998	A$1.86 B	-3.94%
1997	A$1.93 B	87.83%
1996	A$1.03 B

End of Day market cap according to different sources

On Jul 31st, 2026 the market cap of Oneok was reported to be:

A$81.46 Billion

by Nasdaq

A$81.43 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Atmos Energy ATO	A$41.05 B	-49.59%	🇺🇸 USA
Sempra SRE	A$82.39 B	1.18%	🇺🇸 USA
Western Midstream WES	A$27.38 B	-66.37%	🇺🇸 USA
UGI Corporation UGI	A$11.02 B	-86.46%	🇺🇸 USA
Southwest Gas SWX	A$9.20 B	-88.69%	🇺🇸 USA
Sea Limited SE	A$93.05 B	14.27%	🇸🇬 Singapore
National Fuel Gas NFG	A$11.13 B	-86.33%	🇺🇸 USA
EQT Corporation EQT	A$47.44 B	-41.74%	🇺🇸 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 Oneok (OKE)

Market cap: A$81.43 Billion