Oneok (OKE) - Market capitalization

Market cap: A$69.06 Billion

As of December 2025 Oneok has a market cap of A$69.06 Billion. This makes Oneok the world's 510th 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	A$69.06 B	-27.08%
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 Dec 22nd, 2025 the market cap of Oneok was reported to be:

A$68.37 Billion

by Nasdaq

A$68.46 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Atmos Energy ATO	A$40.55 B	-41.28%	🇺🇸 USA
Sempra Energy SRE	A$86.42 B	25.13%	🇺🇸 USA
National Fuel Gas NFG	A$11.14 B	-83.87%	🇺🇸 USA
Western Midstream WES	A$24.04 B	-65.19%	🇺🇸 USA
Sea Limited SE	A$111.16 B	60.96%	🇸🇬 Singapore
UGI Corporation UGI	A$12.28 B	-82.21%	🇺🇸 USA
Southwest Gas SWX	A$8.71 B	-87.38%	🇺🇸 USA
EQT Corporation EQT	A$50.82 B	-26.41%	🇺🇸 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$69.06 Billion