Who owns Oceaneering International, Inc.?
Institutional ownership of OII from SEC Form 13F filings across 254 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.
254
13F holders
$2.92B
value, 2026 filers
74.2%
of shares outstanding (73.9M sh)
45
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 | BROWN ADVISORY INC | 5.0M | $201.3M | 0.3% | 5% | -14.2% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 4.5M | $181.7M | 0.0% | 4.5% | -49.9% |
| 5 | AMERICAN CENTURY COMPANIES INC | 4.0M | $163.1M | 0.1% | 4% | +6.8% |
| 6 | NEUBERGER BERMAN GROUP LLC | 3.2M | $130.8M | 0.1% | 3.2% | +0.3% |
| 7 | FRANKLIN RESOURCES INC | 3.1M | $124.0M | 0.0% | 3.1% | +269.5% |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 2.8M | $115.1M | 0.0% | 2.9% | +19.5% |
| 9 | VAN ECK ASSOCIATES CORP | 1.8M | $75.0M | 0.0% | 1.9% | -10.3% |
| 10 | NORTHERN TRUST CORP | 1.4M | $55.6M | 0.0% | 1.4% | +8.2% |
| 11 | Sixth Street Partners Management Company, L.P.NEW | 1.3M | $54.3M | 9.4% | 1.3% | new |
| 12 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.3M | $54.3M | 0.0% | 1.3% | -3.1% |
| 13 | NOMURA ASSET MANAGEMENT INTERNATIONAL INC.NEW | 1.3M | $53.9M | 0.1% | 1.3% | new |
| 14 | PRICE T ROWE ASSOCIATES INC /MD/ | 1.3M | $53,524 | 0.0% | 1.3% | +2.0% |
| 15 | MORGAN STANLEY | 1.2M | $48.9M | 0.0% | 1.2% | +16.1% |
| 16 | Bank of New York Mellon Corp | 1.1M | $45.7M | 0.0% | 1.1% | +49.2% |
| 17 | GOLDMAN SACHS GROUP INC | 1.1M | $43.6M | 0.0% | 1.1% | +7.7% |
| 18 | ROYAL BANK OF CANADA | 932,192 | $37.8M | 0.0% | 0.9% | -11.1% |
| 19 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 757,311 | $30.7M | 0.0% | 0.8% | +11.1% |
| 20 | VANGUARD FIDUCIARY TRUST CO | 711,899 | $28.8M | 0.0% | 0.7% | +3.1% |
| 21 | Public Sector Pension Investment Board | 685,394 | $27.8M | 0.1% | 0.7% | +92.0% |
| 22 | FEDERATED HERMES, INC. | 666,525 | $27.0M | 0.0% | 0.7% | -3.2% |
| 23 | Invesco Ltd. | 638,880 | $25.9M | 0.0% | 0.6% | -8.9% |
| 24 | Fisher Asset Management, LLC | 635,141 | $25.7M | 0.0% | 0.6% | -19.8% |
| 25 | PRINCIPAL FINANCIAL GROUP INC | 593,561 | $24.1M | 0.0% | 0.6% | +1.4% |
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.