Oceaneering International (OII) - Market capitalization

Market cap: C$3.59 Billion

As of December 2025 Oceaneering International has a market cap of C$3.59 Billion. This makes Oceaneering International the world's 4203th 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 Oceaneering International from 1996 to 2025

End of year Market Cap

Year	Marketcap	Change
2025	C$3.59 B	-1.6%
2024	C$3.65 B	28.55%
2023	C$2.84 B	19.48%
2022	C$2.37 B	65.41%
2021	C$1.43 B	42.9%
2020	C$1.00 B	-47.75%
2019	C$1.92 B	18.61%
2018	C$1.62 B	-37.82%
2017	C$2.61 B	-29.74%
2016	C$3.71 B	-27%
2015	C$5.09 B	-25.09%
2014	C$6.79 B	-25.17%
2013	C$9.08 B	57.4%
2012	C$5.77 B	13.86%
2011	C$5.06 B	27.28%
2010	C$3.98 B	17.78%
2009	C$3.38 B	75.2%
2008	C$1.93 B	-47.84%
2007	C$3.70 B	47.05%
2006	C$2.51 B	62.13%
2005	C$1.55 B	34.1%
2004	C$1.15 B	30.68%
2003	C$0.88 B	-7.47%
2002	C$0.95 B	14.29%
2001	C$0.83 B	24.83%
2000	C$0.67 B	36.63%
1999	C$0.49 B	-5.93%
1998	C$0.52 B	-19.25%
1997	C$0.64 B	27.18%
1996	C$0.50 B

End of Day market cap according to different sources

On Dec 12th, 2025 the market cap of Oceaneering International was reported to be:

C$3.57 Billion

by Nasdaq

C$3.59 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Helix Energy Solutions HLX	C$1.42 B	-60.45%	🇺🇸 USA
Tetra Technologies TTI	C$1.62 B	-54.91%	🇺🇸 USA
Halliburton HAL	C$33.61 B	834.78%	🇺🇸 USA
Forum Energy Technologies FET	C$0.56 B	-84.25%	🇺🇸 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 Oceaneering International (OII)

Market cap: C$3.59 Billion