| OII Market Cap History Table | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Below is a table of the OII market cap history going back to 2/12/2010:
Also see: OII Shares Outstanding History and OII YTD Return |
OII Market Cap History — Oceaneering International Capitalization Over Time
As of 7/17/2026 Oceaneering International has a market cap of 4.21 billion. Investors often follow the OII market cap history to compare the size of the company over time.
This page shows OII market capitalization trends over time, with 69 market cap datapoints presented, dating back to 2/12/2010.
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OII Historical Market Cap: +2.10% CAGR 
Mouse over chart for data details
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| OII Stock Price Chart |
| About Oceaneering International, Inc. |
| Oceaneering International, Inc. is a technology company, which delivers engineered services and products, and robotic solutions to the offshore energy, defense, aerospace, manufacturing and entertainment industries. Co. operates through four segments. Subsea Robotics segment consists of its remotely operated vehicles (ROVs), survey services and ROV tooling businesses. Manufactured Products segment provides distribution systems, such as production control umbilicals and connection systems made up of specialty subsea hardware, along with clamp connectors and subsea and topside control valves. We show 69 historical shares outstanding datapoints in our OII shares outstanding history coverage, used to compute OII market cap on those dates. Understanding the changing numbers of shares outstanding, the changing share price, and the resulting changing OII market cap history over the course of time is important for investors interested in comparing OII's market cap history versus its peers. Many "beginner" or "novice" investors will look at one stock trading at a price of $10 per share and another trading at a price of $20 per share and think the latter company is worth twice as much. Of course, that is a completely meaningless comparison without also knowing how many shares outstanding there are for each of the two companies, and then calculating their respective market caps. Comparing the share price of OII versus a peer is one thing; comparing OII market cap versus a peer is a completely different story. Furthermore, via fluctuation both in per-share price and in the number of shares outstanding (via issuance of new shares over time, the repurchase of existing shares), the market cap for a company like OII can fluctuate over the course of history. With this page we aim to empower investors researching OII by allowing them to research the OII market cap history. |
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| Video: The Importance of Market Cap | |
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Video: The Importance of Market Cap
| OII Share Performance |
| Market Cap Peers |
| Oceaneering International (OII) is categorized under the Energy sector; to help you further research historical market cap numbers, below are some other companies in the same sector:
OIL Market Cap History OIS Market Cap History OKE Market Cap History OMP Market Cap History OPAL Market Cap History ORIG Market Cap History OVV Market Cap History OXY Market Cap History PAA Market Cap History PACD Market Cap History More Energy companies » |
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