Oceaneering International Inc (OII)
Who owns Oceaneering International Inc (OII)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 98.4% of the shares are freely tradable; institutional investors hold 106.3%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 16.39 | 16,348,842 | +2.2 | 03/31/2026 |
| Vanguard Group Inc | 12.40 | 12,371,147 | +1.5 | 12/31/2025 |
| Vanguard Portfolio Management, LLC | 7.60 | 7,578,921 | +0.0 | 03/31/2026 |
| Brown Advisory Holdings Inc | 5.80 | 5,788,601 | -22.1 | 03/31/2026 |
| State Street Corp | 5.05 | 5,034,196 | +8.3 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.49 | 4,478,763 | +0.0 | 03/31/2026 |
| American Century Companies Inc | 3.78 | 3,766,674 | +4.4 | 03/31/2026 |
| Earnest Partners LLC | 3.69 | 3,684,313 | -2.8 | 03/31/2026 |
| Dimensional Fund Advisors, Inc. | 3.47 | 3,461,749 | -0.4 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 6.07 | 6,058,319 | +0.0 | 05/29/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 30. Jul 2026 | Mcevoy M Kevin | Director | Sell | 3,000 | 47.93 | 143,775 |
| 30. Jul 2026 | Dyer Christopher J | SVP, OPGroup | Sell | 1,200 | 47.65 | 57,180 |
| 30. Jul 2026 | Childress Earl | SVP, Chief Commercial Ofc. | Sell | 12,701 | 46.71 | 593,315 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character.
View all insider transactions →Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.