Oneok (OKE) - Market capitalization

Market cap: C$70.88 Billion

As of February 2026 Oneok has a market cap of C$70.88 Billion. This makes Oneok the world's 478th 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	C$70.88 B	12.82%
2025	C$62.82 B	-25.68%
2024	C$84.53 B	55.81%
2023	C$54.25 B	36.16%
2022	C$39.84 B	19.32%
2021	C$33.39 B	53.55%
2020	C$21.74 B	-46.75%
2019	C$40.84 B	35.04%
2018	C$30.24 B	17.37%
2017	C$25.76 B	58.65%
2016	C$16.24 B	126.38%
2015	C$7.17 B	-40.4%
2014	C$12.03 B	-11.99%
2013	C$13.67 B	56.98%
2012	C$8.71 B	-4.07%
2011	C$9.08 B	53.34%
2010	C$5.92 B	19.25%
2009	C$4.96 B	33.79%
2008	C$3.71 B	-20.07%
2007	C$4.64 B	-16.42%
2006	C$5.55 B	83.53%
2005	C$3.02 B	-14.8%
2004	C$3.55 B	30.34%
2003	C$2.72 B	20.51%
2002	C$2.26 B	32.67%
2001	C$1.70 B	-20.07%
2000	C$2.13 B	99.19%
1999	C$1.07 B	-38.85%
1998	C$1.75 B	-2.85%
1997	C$1.80 B	60.69%
1996	C$1.12 B

End of Day market cap according to different sources

On Feb 24th, 2026 the market cap of Oneok was reported to be:

C$71.36 Billion

by Nasdaq

C$71.40 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Atmos Energy ATO	C$41.20 B	-41.87%	🇺🇸 USA
Sempra SRE	C$84.37 B	19.03%	🇺🇸 USA
Western Midstream WES	C$22.87 B	-67.73%	🇺🇸 USA
UGI Corporation UGI	C$10.93 B	-84.58%	🇺🇸 USA
Southwest Gas SWX	C$8.59 B	-87.87%	🇺🇸 USA
Sea Limited SE	C$84.60 B	19.36%	🇸🇬 Singapore
National Fuel Gas NFG	C$11.50 B	-83.77%	🇺🇸 USA
EQT Corporation EQT	C$50.70 B	-28.46%	🇺🇸 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: C$70.88 Billion