Who owns OCEANEERING INTERNATIONAL INC?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of OII from SEC Form 13F filings across 377 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 377 institutions disclosed 104.3M shares of OCEANEERING INTERNATIONAL INC worth $4.22B — about 104.6% of shares outstanding; the largest disclosed holder is BlackRock, Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.
377
13F holders
$4.22B
value, 2026 filers
104.6%
of shares outstanding (104.3M sh)
72
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of OII's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 16.4M | $664.7M | 0.0% | 16.5% | +0.3% |
| 2 | VANGUARD PORTFOLIO MANAGEMENT LLC | 7.9M | $321.2M | 0.0% | 8% | +4.6% |
| 3 | STATE STREET CORP | 5.0M | $202.4M | 0.0% | 5% | -0.8% |
| 4 | BROWN ADVISORY INC | 5.0M | $201.3M | 0.3% | 5% | -14.2% |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 4.5M | $181.7M | 0.0% | 4.5% | +0.1% |
| 6 | AMERICAN CENTURY COMPANIES INC | 4.0M | $163.1M | 0.1% | 4% | +6.8% |
| 7 | EARNEST PARTNERS LLC | 3.5M | $143.7M | 0.5% | 3.6% | -3.7% |
| 8 | DIMENSIONAL FUND ADVISORS LP | 3.5M | $143.7M | 0.0% | 3.6% | +2.5% |
| 9 | NEUBERGER BERMAN GROUP LLC | 3.2M | $130.8M | 0.1% | 3.2% | +0.3% |
| 10 | Morgan Stanley Institutional Investment Advisors LLC | 3.1M | $124.2M | 11.6% | 3.1% | -11.2% |
| 11 | FRANKLIN RESOURCES INC | 3.1M | $124.0M | 0.0% | 3.1% | +269.5% |
| 12 | GEODE CAPITAL MANAGEMENT, LLC | 2.8M | $115.1M | 0.0% | 2.8% | +19.5% |
| 13 | BARROW HANLEY MEWHINNEY & STRAUSS LLC | 2.3M | $92.1M | 0.3% | 2.3% | +60.0% |
| 14 | Greenhouse Funds LLLP | 1.9M | $76.8M | 3.9% | 1.9% | -6.7% |
| 15 | VAN ECK ASSOCIATES CORP | 1.8M | $75.0M | 0.0% | 1.9% | -10.3% |
| 16 | REINHART PARTNERS, LLC.NEW | 1.6M | $66.8M | 1.5% | 1.7% | new |
| 17 | LOOMIS SAYLES & CO L P | 1.6M | $65.1M | 0.1% | 1.6% | -5.5% |
| 18 | NORTHERN TRUST CORP | 1.4M | $55.6M | 0.0% | 1.4% | +8.2% |
| 19 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.3M | $54.3M | 0.0% | 1.3% | -3.1% |
| 20 | NOMURA ASSET MANAGEMENT INTERNATIONAL INC.NEW | 1.3M | $53.9M | 0.1% | 1.3% | new |
| 21 | PRICE T ROWE ASSOCIATES INC /MD/ | 1.3M | $53.5M | 0.0% | 1.3% | +2.0% |
| 22 | MORGAN STANLEY | 1.2M | $48.9M | 0.0% | 1.2% | +16.1% |
| 23 | Bank of New York Mellon Corp | 1.1M | $45.7M | 0.0% | 1.1% | +49.2% |
| 24 | GOLDMAN SACHS GROUP INC | 1.1M | $43.6M | 0.0% | 1.1% | +7.7% |
| 25 | ROYAL BANK OF CANADA | 932,192 | $37.8M | 0.0% | 0.9% | -11.1% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.