Oceaneering International Inc. (OII) Ownership & Trading Activity
Institutional holders, insider transactions, and congressional trades for OII. 13F holdings as of 2026-06-30.
In 13F filings for the quarter ended June 30, 2026, 364 institutions reported holding OII, with 104.2 million shares worth $4.2 billion in aggregate.
Top Institutional Holders
| Institution | Shares | Value | Change |
|---|---|---|---|
| BlackRock | 16,403,230 | $665M | INCREASED |
| Vanguard | 13,298,109 | $539M | INCREASED |
| State Street | 4,994,403 | $202M | DECREASED |
| Brown Advisory | 4,967,307 | $201M | DECREASED |
| Morgan Stanley | 4,273,502 | $173M | DECREASED |
Recent Insider Trades
| Insider | Type | Shares | Value | Date |
|---|---|---|---|---|
| Roderick A. Larson (President and CEO) | SELL | 4,300 | $191K | 2026-11-02 |
| Roderick A. Larson (President and CEO) | SELL | 1,700 | $74K | 2026-11-02 |
| Roderick A. Larson (President and CEO) | SELL | 4,300 | $191K | 2026-10-01 |
| Roderick A. Larson (President and CEO) | SELL | 1,700 | $74K | 2026-10-01 |
Full institutional holdings, insider history, and congressional trades for Oceaneering International Inc. on SentiSense.