Oceaneering Ownership | Who Owns Oceaneering?
Oceaneering Ownership Summary
Oceaneering is owned by 29.86% institutional investors, 1.36% insiders, and 68.78% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 16.23% of OII shares. iShares Core S&P Small-Cap ETF is the top mutual fund, with 6.10% of its assets in Oceaneering shares.
OII Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Oceaneering | 29.86% | 1.36% | 68.78% |
| Sector | Energy Stocks | 79.40% | 16.36% | 4.25% |
| Industry | Oil & Gas Equipment & Services Stocks | 44.26% | 15.75% | 40.00% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock funding, inc. /de | 16.35M | 16.23% | $579.89M |
| Blackrock | 15.81M | 15.65% | $374.10M |
| Vanguard group | 12.37M | 12.37% | $297.28M |
| Brown advisory | 5.79M | 5.74% | $205.32M |
| State street | 5.03M | 5.00% | $178.56M |
| American century companies | 3.77M | 3.74% | $133.60M |
| Earnest partners | 3.68M | 3.66% | $130.68M |
| Dimensional fund advisors lp | 3.46M | 3.44% | $122.78M |
| Morgan stanley institutional investment advisors | 3.45M | 3.43% | $122.48M |
| Neuberger berman group | 3.22M | 3.19% | $114.15M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Morgan stanley institutional investment advisors | 3.45M | 11.81% | $122.48M |
| Archon capital management | 208.00K | 4.16% | $7.38M |
| Greenhouse funds lllp | 2.03M | 3.23% | $72.09M |
| Keating investment counselors | 338.44K | 2.97% | $12.00M |
| Old west investment management | 697.19K | 2.68% | $24.73M |
| Ranger investment management | 796.60K | 2.04% | $28.26M |
| Geosphere capital management | 120.00K | 1.86% | $4.26M |
| Manatuck hill partners | 160.60K | 1.54% | $5.70M |
| Goehring & rozencwajg associates | 713.59K | 1.36% | $25.31M |
| Corigliano investment advisers | 82.60K | 1.14% | $2.93M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Barrow hanley mewhinney & strauss | 1.42M | 0.17% | 1.42M |
| Price t rowe associates inc /md/ | 1.30M | 0.01% | 1.19M |
| Boston partners | 854.94K | 0.03% | 854.94K |
| Vanguard fiduciary trust | 690.61K | 0.01% | 690.61K |
| Massachusetts financial services co /ma/ | 681.60K | 0.01% | 681.60K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Congress asset management co /ma | - | - | -1.79M |
| Brown advisory | 5.79M | 0.34% | -1.64M |
| Sourcerock group | - | - | -1.29M |
| Hennessy advisors | - | - | -1.28M |
| Fil | - | - | -796.58K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Barrow hanley mewhinney & strauss | 1.42M | 0.17% | 1.42M | $50.40M |
| Boston partners | 854.94K | 0.03% | 854.94K | $30.34M |
| Vanguard fiduciary trust | 690.61K | 0.01% | 690.61K | $24.50M |
| Massachusetts financial services co /ma/ | 681.60K | 0.01% | 681.60K | $24.18M |
| Norges bank | 238.40K | 0.00% | 238.40K | $6.22M |
Sold Out
| Holder | Change |
|---|---|
| True wealth design | -2.00 |
| Global financial private client | -9.00 |
| Newsquare capital | -9.00 |
| Allspring global investments | -13.00 |
| Clearstead advisors | -14.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Mar 31, 2026 | 203 | -36.16% | 30,238,822 | -69.84% | 29 | 0.30% | 112 | -30.86% | 58 | -46.30% |
| Dec 31, 2025 | 243 | -20.33% | 86,093,226 | -9.92% | 86 | 0.95% | 118 | -22.88% | 83 | -19.42% |
| Sep 30, 2025 | 291 | 0.34% | 95,452,859 | -0.45% | 94 | 1.04% | 147 | -8.70% | 99 | - |
| Jun 30, 2025 | 288 | -0.69% | 95,645,355 | -0.39% | 95 | 1.05% | 160 | 7.38% | 98 | -9.26% |
| Mar 31, 2025 | 287 | -1.37% | 95,995,193 | -4.49% | 95 | 0.96% | 148 | -8.07% | 108 | 17.39% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 6.08M | 6.10% | 1.32K |
| Vanguard Total Stock Mkt Idx Inv | 3.20M | 3.21% | 10.86K |
| Avantis US Small Cap Value ETF | 3.15M | 3.16% | - |
| Vanguard US Total Market Shares ETF | 3.18M | 3.15% | 3.78K |
| iShares Russell 2000 ETF | 2.34M | 2.34% | 19.74K |
| Neuberger Berman Genesis Inv | 2.34M | 2.33% | -173.55K |
| Vanguard Small Cap Index | 2.29M | 2.30% | -5.72K |
| Neuberger Genesis Inv | 1.97M | 1.97% | -114.35K |
| VanEck Oil Services ETF | 1.73M | 1.74% | - |
| Harbor Small Cap Value Instl | 1.43M | 1.44% | -12.76K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| May 18, 2026 | LARSON RODERICK A. | President and CEO | Sell | $191.35K |
| May 12, 2026 | MCDONALD MARTIN J | SVP, Subsea Robotics | Sell | $998.61K |
| May 13, 2026 | MCDONALD MARTIN J | SVP, Subsea Robotics | Sell | $1.69M |
| Mar 11, 2026 | MCEVOY M KEVIN | - | Sell | $905.66K |
| Feb 25, 2026 | Simons Jennifer Fremont | SVP, CLO and Secretary | Sell | $400.66K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q2 | - | 3 |
| 2026 Q1 | - | 16 |
| 2025 Q3 | - | 2 |
| 2025 Q2 | - | 1 |
| 2025 Q1 | - | - |
OII Ownership FAQ
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