Oneok (OKE) - Market capitalization

Market cap: £35.49 Billion

As of December 2025 Oneok has a market cap of £35.49 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	£35.49 B	-24.38%
2024	£46.94 B	46.2%
2023	£32.10 B	32.28%
2022	£24.27 B	25.04%
2021	£19.41 B	55.14%
2020	£12.51 B	-47.53%
2019	£23.84 B	36.34%
2018	£17.49 B	15.34%
2017	£15.16 B	54.82%
2016	£9.79 B	180.65%
2015	£3.49 B	-47.61%
2014	£6.66 B	-14.46%
2013	£7.78 B	43.69%
2012	£5.42 B	-5.64%
2011	£5.74 B	49.66%
2010	£3.83 B	31.58%
2009	£2.91 B	40.03%
2008	£2.08 B	-11.11%
2007	£2.34 B	-3.82%
2006	£2.43 B	61.57%
2005	£1.50 B	-2.15%
2004	£1.54 B	31.16%
2003	£1.17 B	31.52%
2002	£0.89 B	21.01%
2001	£0.73 B	-22.62%
2000	£0.95 B	107.6%
1999	£0.45 B	-32.92%
1998	£0.68 B	-10.81%
1997	£0.76 B	60.57%
1996	£0.47 B

End of Day market cap according to different sources

On Dec 8th, 2025 the market cap of Oneok was reported to be:

£35.45 Billion

by Nasdaq

£35.48 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Atmos Energy ATO	£20.21 B	-43.05%	🇺🇸 USA
Sempra Energy SRE	£43.34 B	22.11%	🇺🇸 USA
National Fuel Gas NFG	£5.56 B	-84.32%	🇺🇸 USA
Western Midstream WES	£11.92 B	-66.41%	🇺🇸 USA
Sea Limited SE	£57.27 B	61.35%	🇸🇬 Singapore
UGI Corporation UGI	£6.10 B	-82.81%	🇺🇸 USA
Southwest Gas SWX	£4.34 B	-87.77%	🇺🇸 USA
EQT Corporation EQT	£27.46 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: £35.49 Billion