Oceaneering International Inc
Ownership
Ownership Structure
Who owns Oceaneering International Inc (OII)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 98.3% of the shares are freely tradable; institutional investors hold 106.3%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 16.48 | 16,403,230 | +0.3 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 7.96 | 7,926,938 | +4.6 | 06/30/2026 |
| State Street Corp | 5.02 | 4,994,403 | -0.8 | 06/30/2026 |
| Brown Advisory Holdings Inc | 4.99 | 4,967,307 | -14.2 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.51 | 4,485,268 | +0.1 | 06/30/2026 |
| American Century Companies Inc | 4.04 | 4,023,994 | +6.8 | 06/30/2026 |
| Earnest Partners LLC | 3.56 | 3,547,295 | -3.7 | 06/30/2026 |
| Dimensional Fund Advisors, Inc. | 3.56 | 3,546,908 | +2.5 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 5.96 | 5,927,755 | +0.0 | 09/30/2026 |
| Avantis US Small Cap Value ETF | 3.77 | 3,753,750 | +0.1 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Larson Roderick A. | President and CEO | 391,279 | 16,003,311 $ | Oct 1, 2026 | indirect |
| Mcevoy M Kevin | Director | 134,133 | 5,486,040 $ | Jul 30, 2026 | direct |
| Murphy Paul B Jr | Director | 68,916 | 2,818,664 $ | Aug 7, 2026 | direct |
| Childress Earl | SVP, Chief Commercial Ofc. | 22,876 | 935,628 $ | Jul 30, 2026 | direct |
| Dyer Christopher J | SVP, OPGroup | 14,702 | 601,312 $ | Jul 30, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 1, 2026 | Larson Roderick A. | President and CEO | Sell | 4,300 | 44.38 | 190,834 |
| Oct 1, 2026 | Larson Roderick A. | President and CEO | Sell | 1,700 | 43.61 | 74,137 |
| Aug 7, 2026 | Murphy Paul B Jr | Director | Sell | 10,000 | 48.37 | 483,690 |
| Jul 30, 2026 | Mcevoy M Kevin | Director | Sell | 3,000 | 47.93 | 143,775 |
| Jul 30, 2026 | Dyer Christopher J | SVP, OPGroup | Sell | 1,200 | 47.65 | 57,180 |
| Jul 30, 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: October 30, 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.