Canonical: https://ownershiptrace.com/13f/companies/2142

# Who owns OCEANEERING INTERNATIONAL INC (OII)? Elite investor 13F holders

5 tracked elite investors reported holding OCEANEERING INTERNATIONAL INC as of 2026-06-30, including GAMCO, Gotham Asset Management, Renaissance Technologies LLC, D.E. Shaw, GMO. Who bought, trimmed or exited each quarter, with links to the original SEC 13F filings.

5 tracked investors currently reported holding · Latest report period: 2026-06-30 · Energy · Energy

Oceaneering International, Inc. provides engineered services and products and robotic solutions to the offshore energy, defense, aerospace, and manufacturing industries in the United States, Africa, the United Kingdom, Norway, Brazil, Asia, Australia, and internationally. It operates through five segments: Subsea Robotics, Manufactured Products, Offshore Projects Group, Integrity Management &…

## Reported holders and securities, including exits (up to 20)

| Investor | Security | Instrument | Report period | Filed | Value | Quantity | Units | Change | Source |
|  --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| [GAMCO](https://ownershiptrace.com/13f/investors/137) | OCEANEERING INTL INC | SHARE | 2026-06-30 | 2026-08-12 00:00:00 | 12313947.00 USD | 303898.000000 | Shares | reduce | [Original filing](https://www.sec.gov/Archives/edgar/data/807249/0001140361-26-032508-index.html) |
| [Gotham Asset Management](https://ownershiptrace.com/13f/investors/94672) | OCEANEERING INTL INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 3193786.00 USD | 78820.000000 | Shares | add | [Original filing](https://www.sec.gov/Archives/edgar/data/1510387/0001398344-26-014644-index.html) |
| [Renaissance Technologies LLC](https://ownershiptrace.com/13f/investors/63) | OCEANEERING INTL INC | SHARE | 2026-06-30 | 2026-08-13 00:00:00 | 1814972.00 USD | 44792.000000 | Shares | reduce | [Original filing](https://www.sec.gov/Archives/edgar/data/1037389/0001037389-26-000059-index.html) |
| [Oldfield Partners](https://ownershiptrace.com/13f/investors/94676) | OCEANEERING INTL INC | SHARE | 2026-06-30 | 2026-07-10 00:00:00 | 0.00 USD | 0.000000 | Shares | exited | [Original filing](https://www.sec.gov/Archives/edgar/data/1492815/0001492815-26-000004-index.html) |
| [D.E. Shaw](https://ownershiptrace.com/13f/investors/98) | OCEANEERING INTL INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 366665.00 USD | 9049.000000 | Shares | buy | [Original filing](https://www.sec.gov/Archives/edgar/data/1009207/0001104659-26-097217-index.html) |
| [GMO](https://ownershiptrace.com/13f/investors/94674) | OCEANEERING INTL INC | SHARE | 2026-06-30 | 2026-08-13 00:00:00 | 292716.00 USD | 7224.000000 | Shares | buy | [Original filing](https://www.sec.gov/Archives/edgar/data/1352662/0001072613-26-000636-index.html) |

Public disclosures can be delayed, incomplete, or amended. Report period describes a position date; transaction date describes a reported transaction; filed describes submission. A recent filing or page update does not establish a current holding. A dash means unavailable or not comparable, not zero.

This public summary shows the default reporting scope. Enable JavaScript for interactive filters, charts, and additional rows.

[How to read the data](https://ownershiptrace.com/docs#reading-the-data) · [Disclaimer](https://ownershiptrace.com/disclaimer)