Oceaneering International
OII • NYSE
Oceaneering International is a oil & gas equipment & services company in the energy sector on NYSE, led by Roderick A. Larson, with a market cap of $2.6B. As of Q3 2025, 95% of shares are held by 295 institutional investors, with BlackRock, Inc. as the largest holder at 15.64%.
President and Chief Executive OfficerRoderick A. Larson
Market Cap$2.6B
Oil & Gas Equipment & Services
Energy
Employees10.1K
Websiteoceaneering.com
Country
United States of America
Overview
Overview of institutional ownership in OII as of Q3 2025 with a market cap of $2.5B
All Institutions
- Institutions
- 295
- Value Held
- $2.4B
- Shares Held
- 95.4M
- Avg Position
- $8.0M
- Median Position
- $562.7K
Hedge Funds
- Hedge Funds
- 37
- Value Held
- $173.1M
- Shares Held
- 7.0M
- Avg Position
- $4.7M
- Median Position
- $1.6M
Ownership Breakdown
Based on market cap of $2.5B as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.
Biggest Investors
Institutions with the largest positions in OII as of Q3 2025
| Institution | Position Value |
|---|---|
B BlackRock, Inc. Institution | $388.3M 0.01% of portfolio |
 VANGUARD GROUP INC Institution | $301.9M 0.00% of portfolio |
B BROWN ADVISORY INC RIA/Wealth | $190.9M 0.26% of portfolio |
 STATE STREET CORP Institution | $109.8M 0.00% of portfolio |
 EARNEST PARTNERS LLC Long Only Manager | $99.5M 0.43% of portfolio |
A AMERICAN CENTURY COMPANIES INC Institution | $90.3M 0.05% of portfolio |
N Neuberger Berman Group LLC Institution | $87.7M 0.06% of portfolio |
 DIMENSIONAL FUND ADVISORS LP Long Only Manager | $81.4M 0.02% of portfolio |
G Greenhouse Funds LLLP Hedge Fund•Long/Short | $61.7M 2.40% of portfolio |
 GEODE CAPITAL MANAGEMENT LLC ETF Provider | $55.8M 0.00% of portfolio |
Net Capital Flow
Institutional buying and selling activity for OII in Q3 2025
- Traded
- −$6.7M
- Buyers
- 152
- Sellers
- 130
- Total Bought
- +$136.9M
- Total Sold
- −$143.6M
- Avg Position
- $7.3M
Biggest Buyers
| Institution | Net Bought |
|---|---|
 GOLDMAN SACHS GROUP INC Institution | +$12.3M +496.6K shares |
 JPMORGAN CHASE & CO Institution | +$9.2M +371.6K shares |
B BROWN ADVISORY INC RIA/Wealth | +$8.8M +356.6K shares |
 TUDOR INVESTMENT CORP ET AL Hedge Fund•Multi-Strategy | +$8.3M +333.7K shares |
 ALGERT COLDIRON INVESTORS LLC Hedge Fund•Quant | +$6.9M +276.8K shares |
A AMERICAN CENTURY COMPANIES INC Institution | +$6.8M +272.7K shares |
S SIR Capital Management, L.P. Hedge Fund•Long/Short | +$6.8M +272.4K shares |
 SummitTX Capital, L.P. Hedge Fund•Multi-Strategy | +$5.6M +226.8K shares |
 FORT WASHINGTON INVESTMENT ADVISORS INC /OH/ Long Only Manager | +$4.2M +167.5K shares |
 BANK OF AMERICA CORP /DE/ Institution | +$4.0M +160.1K shares |
Biggest Sellers
| Institution | Net Sold |
|---|---|
 BALYASNY ASSET MANAGEMENT LLC Hedge Fund•Multi-Strategy | −$28.5M −1.1M shares |
 FRANKLIN RESOURCES INC Institution | −$13.2M −533.4K shares |
 MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy | −$12.8M −517.6K shares |
STATE STREET CORP Institution | −$9.4M −378.9K shares |
VANGUARD GROUP INC Institution | −$5.2M −208.1K shares |
EARNEST PARTNERS LLC Long Only Manager | −$5.0M −202.7K shares |
 ExodusPoint Capital Management, LP Hedge Fund•Multi-Strategy | −$3.9M −157.4K shares |
 SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity | −$3.5M −141.8K shares |
 FMR LLC Institution | −$3.3M −133.2K shares |
J JANE STREET GROUP, LLC Institution | −$2.9M −117.7K shares |
Entry and Exit Activity
Institutions that initiated new positions or completely exited OII in Q3 2025
- New Positions
- 21
- New Value
- $10.0M
- Exited Positions
- 29
- Exited Value
- $11.6M
New Positions
| Institution | Position Value |
|---|---|
SummitTX Capital, L.P. Hedge Fund•Multi-Strategy | $5.6M 226.8K shares |
A Annex Advisory Services, LLC Institution | $1.3M 53.6K shares |
 SummerHaven Investment Management, LLC Long Only Manager | $967.4K 39.0K shares |
 Horizon Investments, LLC/SC Long Only Manager | $720.1K 29.1K shares |
 CenterBook Partners LP Hedge Fund•Market Neutral | $409.2K 16.5K shares |
 Gallacher Capital Management LLC RIA/Wealth | $318.1K 12.8K shares |
 Round Rock Advisors, LLC RIA/Wealth | $281.8K 11.4K shares |
 Legacy Capital Group California, Inc. RIA/Wealth | $232.9K 9.4K shares |
 Point72 Europe LLP Digital Asset Manager | $32.4K 1.3K shares |
Q Quarry LP Institution | $30.5K 1.2K shares |
Exited Positions
| Institution | Previous Position |
|---|---|
H HRT FINANCIAL LLC Institution | $2.1M 100.5K shares |
T TEXAS PERMANENT SCHOOL FUND Institution | $2.0M 95.4K shares |
 ZACKS INVESTMENT MANAGEMENT RIA/Wealth | $1.5M 71.9K shares |
 Aquatic Capital Management LLC Hedge Fund•Quant | $958.2K 46.2K shares |
 Centiva Capital, LP Hedge Fund•Multi-Strategy | $663.4K 32.0K shares |
X XTX Topco Ltd Institution | $530.8K 25.6K shares |
 Corigliano Investment Advisers, LLC Hedge Fund•Sector | $528.4K 25.5K shares |
O OXFORD ASSET MANAGEMENT Institution | $433.0K 20.9K shares |
 TWO SIGMA ADVISERS, LLC Hedge Fund•Multi-Strategy | $410.3K 19.8K shares |
 Graham Capital Management, L.P. Hedge Fund•Multi-Strategy | $385.1K 18.6K shares |
Options Activity
Institutions with the largest Call and Put options positions in OII as of Q3 2025
- Call Positions
- 6
- Call Value
- $6.9M
- Put Positions
- 4
- Put Value
- $3.6M
Call Positions
| Institution | Position Value |
|---|---|
 Caption Management, LLC Hedge Fund•Long/Short | $6.2M 2.5K contracts |
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity | $369.2K 149.0 contracts |
 CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy | $329.6K 133.0 contracts |
J JANE STREET GROUP, LLC Institution | - - contracts |
 Walleye Trading LLC RIA/Wealth | - - contracts |
W WOLVERINE TRADING, LLC Institution | - - contracts |
Put Positions
| Institution | Position Value |
|---|---|
Caption Management, LLC Hedge Fund•Long/Short | $2.5M 1.0K contracts |
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy | $594.7K 240.0 contracts |
J JANE STREET GROUP, LLC Institution | $505.5K 204.0 contracts |
Walleye Trading LLC RIA/Wealth | - - contracts |
Most Committed Institutions
Institutions with OII as the highest % of their portfolio as of Q3 2025
| Institution | Portfolio Weight |
|---|---|
 KEATING INVESTMENT COUNSELORS INC RIA/Wealth | 2.66% $8.9M |
G Greenhouse Funds LLLP Hedge Fund•Long/Short | 2.40% $61.7M |
W West Tower Group, LLC Fund of Funds | 1.94% $669.1K |
 Sagefield Capital LP Private Equity | 1.41% $12.6M |
 Goehring & Rozencwajg Associates, LLC Long Only Manager | 1.39% $11.5M |
O Old West Investment Management, LLC Hedge Fund•Multi-Strategy | 1.34% $5.9M |
 Glenorchy Capital Ltd Hedge Fund•Global Macro | 1.32% $1.8M |
 Aristotle Capital Boston, LLC Long Only Manager | 1.07% $20.9M |
 Ranger Investment Management, L.P. Long Only Manager | 1.03% $14.8M |
S SIR Capital Management, L.P. Hedge Fund•Long/Short | 0.61% $6.8M |
Hedge Fund Spotlight
Discover hedge funds investing in OII
TUDOR INVESTMENT CORP ET AL
Hedge Fund • Multi-Strategy
Portfolio ManagerMichael Riccardi
- Portfolio Value
- $16.0B
- Positions
- 1,517
- Last Reported
- Q3 2025
Sector Allocation
Position in Oceaneering International
- Market Value
- $12.2M
- Shares Held
- 491.9K
- Portfolio Weight
- 0.08%
- Owned Since
- 2024-Q2
| Top Holding | Sector | Market Value | Weight |
|---|---|---|---|
ETF ETF | $968.5M | 6.05% | |
ETF ETF | $344.0M | 2.15% | |
Semiconductors Technology | $219.5M | 1.37% |
