OII Oceaneering International Inc.
Oceaneering International Inc. (OII) Hedge Fund Activity
This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of June 30, 2026.
Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.
Most significant moves
Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.
| Fund | Action | Shares changed | Change | Est. value | Portfolio wt. | Score |
|---|---|---|---|---|---|---|
| CITADEL ADVISORS LLC Quant | Sold Out | -78.4K | -100.0% | $3.2M | 0.0% | 60 |
| MILLENNIUM MANAGEMENT LLC | New | +154.7K | — | $6.3M | 0.0% | 59 |
| Qube Research & Technologies Ltd Quant | Sold Out | -588.3K | -100.0% | $23.8M | 0.0% | 59 |
| MARSHALL WACE, LLP Long/Short | New | +104.8K | — | $4.2M | 0.0% | 58 |
| D. E. Shaw & Co., Inc. Quant | New | +9.0K | — | $366.7K | 0.0% | 58 |
| Holocene Advisors, LP | New | +25.4K | — | $1.0M | 0.0% | 58 |
| Balyasny Asset Management L.P. | Sold Out | -14.8K | -100.0% | $598.2K | 0.0% | 57 |
| TWO SIGMA INVESTMENTS, LP Quant | New | +14.7K | — | $594.9K | 0.0% | 57 |
| Capstone Investment Advisors Quant Macro | New | +25.1K | — | $1.0M | 0.0% | 55 |
| Weiss Asset Management Event Quant | New | +23.7K | — | $960.1K | 0.0% | 54 |
Most significant buyers
By move score, not size.
- MILLENNIUM MANAGEMENT LLC
- MARSHALL WACE, LLP
- D. E. Shaw & Co., Inc.
- Holocene Advisors, LP
- TWO SIGMA INVESTMENTS, LP
Most significant sellers
By move score, not size.
- CITADEL ADVISORS LLC
- Qube Research & Technologies Ltd
- Balyasny Asset Management L.P.
- Quadrature Capital
- Man Group
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| CITADEL ADVISORS LLC | 1 | 0 | 78.4K | -78.4K | -100.0% | 0.0% | Sold Out | 60 |
| MILLENNIUM MANAGEMENT LLC | 2 | 154.7K | 0 | +154.7K | — | 0.0% | New | 59 |
| Qube Research & Technologies Ltd | 2 | 0 | 588.3K | -588.3K | -100.0% | 0.0% | Sold Out | 59 |
| MARSHALL WACE, LLP | 2 | 104.8K | 0 | +104.8K | — | 0.0% | New | 58 |
| D. E. Shaw & Co., Inc. | 1 | 9.0K | 0 | +9.0K | — | 0.0% | New | 58 |
| Holocene Advisors, LP | 2 | 25.4K | 0 | +25.4K | — | 0.0% | New | 58 |
| Balyasny Asset Management L.P. | 2 | 0 | 14.8K | -14.8K | -100.0% | 0.0% | Sold Out | 57 |
| TWO SIGMA INVESTMENTS, LP | 2 | 14.7K | 0 | +14.7K | — | 0.0% | New | 57 |
| Capstone Investment Advisors | 3 | 25.1K | 0 | +25.1K | — | 0.0% | New | 55 |
| Weiss Asset Management | 2 | 23.7K | 0 | +23.7K | — | 0.0% | New | 54 |
| Interval Partners | 3 | 16.4K | 0 | +16.4K | — | 0.0% | New | 53 |
| Quadrature Capital | 3 | 0 | 5.8K | -5.8K | -100.0% | 0.0% | Sold Out | 52 |
| ExodusPoint Capital Management | 3 | 6.8K | 0 | +6.8K | — | 0.0% | New | 52 |
| Man Group | 3 | 0 | 24.2K | -24.2K | -100.0% | 0.0% | Sold Out | 52 |
| Y-Intercept | 4 | 0 | 62.5K | -62.5K | -100.0% | 0.0% | Sold Out | 50 |
| Aquatic Capital Management | 4 | 15.7K | 0 | +15.7K | — | 0.0% | New | 48 |
| Engineers Gate | 4 | 0 | 24.1K | -24.1K | -100.0% | 0.0% | Sold Out | 48 |
| Squarepoint Ops LLC | 2 | 62.0K | 35.5K | +26.5K | +74.5% | 0.0% | Increased | 44 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 44.8K | 85.0K | -40.2K | -47.3% | 0.0% | Reduced | 41 |
| CenterBook Partners | 4 | 5.1K | 33.1K | -28.0K | -84.6% | 0.0% | Reduced | 41 |
| Aristeia Capital | 2 | 10.3K | 16.4K | -6.2K | -37.5% | 0.0% | Reduced | 32 |
| Edgestream Partners | 4 | 65.6K | 116.5K | -51.0K | -43.7% | 0.1% | Reduced | 31 |
| Gotham Asset Management, LLC | 2 | 78.8K | 65.9K | +12.9K | +19.6% | 0.0% | Increased | 28 |
| Caxton Associates | 3 | 32.9K | 28.1K | +4.8K | +17.0% | 0.0% | Increased | 26 |
| AQR Capital Management | 3 | 449.0K | 392.2K | +56.9K | +14.5% | 0.0% | Increased | 25 |
| Winton Group | 4 | 37.5K | 40.0K | -2.5K | -6.2% | 0.1% | Reduced | 19 |
Every fund above opens. Subscribers can see any manager's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeHedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.