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Oceaneering International (OII) Institutional Ownership

Oceaneering International logo
$44.87 +0.29 (+0.64%)
Closing price 10/9/2026 03:59 PM Eastern
Extended Trading
$44.82 -0.05 (-0.12%)
As of 10/9/2026 07:30 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Institutional Ownership Changes (13F Filings) for Oceaneering International (NYSE:OII)

Current
Institutional Ownership
Percentage
93.93%
Number of
Institutional Buyers
(last 12 months)
185
Total
Institutional Inflows
(last 12 months)
$1.47B
Number of
Institutional Sellers
(last 12 months)
109
Total
Institutional Outflows
(last 12 months)
$223.67M
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OII Institutional Buying and Selling by Quarter

Oceaneering International Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
10/9/2026GAMMA Investing LLC6,081$265K0.0%+18.7%0.006%
10/8/2026Veracity Capital LLC13,237$578K0.2%N/A0.013%
9/23/2026QRG Capital Management Inc.24,006$973K0.0%+12.9%0.024%
9/9/2026Sequoia Financial Advisors LLC5,528$224K0.0%N/A0.006%
9/9/2026Tidal Investments LLC30,209$1.22M0.0%+8.4%0.030%
9/9/2026WINTON GROUP Ltd37,534$1.52M0.0%-6.2%0.038%
9/9/2026Integrated Wealth Concepts LLC859$35K0.0%N/A0.001%
9/9/2026NewEdge Advisors LLC32,640$1.32M0.0%+24.2%0.033%
9/9/2026IFP Advisors Inc5,491$222K0.0%+80.2%0.006%
9/9/2026Squarepoint Ops LLC62,023$2.51M0.0%+74.5%0.062%
9/8/2026Allworth Financial LP1,046$42K0.0%+63.2%0.001%
9/8/2026Nykredit A S7,092$287K0.0%N/A0.007%
8/27/2026Corient Private Wealth LP16,227$658K0.0%+50.0%0.016%
8/26/2026Amundi19,778$801K0.0%+87.9%0.020%
8/26/2026HighTower Advisors LLC16,564$671K0.0%-45.3%0.017%
8/25/2026VIRGINIA RETIREMENT SYSTEMS ET Al6,600$267K0.0%N/A0.007%
8/22/2026Compass Financial Management LLC4,984$202K0.0%N/A0.005%
8/22/2026Concurrent Investment Advisors LLC131,457$5.33M0.0%+12.8%0.132%
8/21/2026Round Rock Advisors LLC20,056$813K0.1%+15.9%0.020%
8/21/2026Nykredit A S7,092$287K0.0%N/A0.007%
8/20/2026Sigma Planning Corp11,376$461K0.0%N/A0.011%
8/20/2026Hennessy Advisors Inc.267,086$10.82M0.3%N/A0.268%
8/19/2026UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC162,283$6.58M0.0%-45.8%0.163%
8/19/2026Van ECK Associates Corp1,849,926$74.96M0.0%-10.3%1.859%
8/18/2026Empowered Funds LLC134,103$5.43M0.0%N/A0.135%
8/18/2026Public Employees Retirement System of Ohio1,334$54K0.0%N/A0.001%
8/17/2026Capstone Investment Advisors LLC25,094$1.02M0.0%N/A0.025%
8/17/2026Corient Private Wealth LP10,415$422K0.0%N/A0.010%
8/17/2026Bank of America Corp DE364,827$14.78M0.0%N/A0.367%
8/15/2026Jupiter Topco LLC156,318$6.33M0.0%N/A0.157%
8/14/2026EFG International AG91,994$3.73M0.1%N/A0.092%
8/14/2026PDT Partners LLC12,188$494K0.0%N/A0.012%
8/14/2026Canada Pension Plan Investment Board18,400$746K0.0%N/A0.018%
8/14/2026Manatuck Hill Partners LLC160,600$6.51M2.2%N/A0.161%
8/14/2026Legal & General Group Plc242,503$9.83M0.0%N/A0.244%
8/14/2026The Manufacturers Life Insurance Company49,067$1.99M0.0%N/A0.049%
8/14/2026Algert Global LLC53,793$2.18M0.0%-88.1%0.054%
8/13/2026Morgan Stanley Institutional Investment Advisors LLC3,066,015$124.24M11.6%N/A3.080%
8/13/2026Ranger Investment Management L.P.777,643$31.51M2.0%N/A0.781%
8/13/2026Barrow Hanley Mewhinney & Strauss LLC2,272,949$92.10M0.3%N/A2.284%
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8/13/2026Globeflex Capital L P7,283$295K0.0%N/A0.007%
8/12/2026Compass Financial Management LLC4,984$251K0.0%N/A0.005%
8/12/2026Commerce Bank8,560$347K0.0%N/A0.009%
8/12/2026Evolve Private Wealth LLC17,116$694K0.0%N/A0.017%
8/12/2026EP Wealth Advisors LLC21,106$855K0.0%N/A0.021%
8/12/2026Callan Family Office LLC11,171$453K0.0%N/A0.011%
8/11/2026Allworth Financial LP1,046$42K0.0%N/A0.001%
8/11/2026Vise Technologies Inc.16,231$658K0.0%N/A0.016%
8/10/2026Great Lakes Advisors LLC10,987$445K0.0%N/A0.011%
8/7/2026BlackRock Inc.16,403,230$664.66M0.0%N/A16.481%
8/7/2026Deutsche Bank AG104,689$4.24M0.0%N/A0.105%
8/7/2026Mitsubishi UFJ Asset Management Co. Ltd.71,302$2.89M0.0%N/A0.072%
8/7/2026Persistent Asset Partners Ltd1,635$66K0.0%N/A0.002%
8/7/2026Old West Investment Management LLC693,549$28.10M3.0%N/A0.697%
8/6/2026Bank of New York Mellon Corp1,126,793$45.66M0.0%N/A1.132%
8/6/2026State of Wyoming7,762$315K0.0%N/A0.008%
8/3/2026Oppenheimer Asset Management Inc.70,143$2.84M0.0%N/A0.070%
8/3/2026Dockside LLC38,430$1.56M0.4%N/A0.039%
7/10/2026Annex Advisory Services LLC67,302$2.73M0.0%+29.3%0.067%
7/8/2026Reinhart Partners LLC.1,648,423$66.80M1.5%N/A1.653%
7/7/2026GAMMA Investing LLC5,124$208K0.0%+27.1%0.005%
7/7/2026Central Pacific Bank Trust Division21,696$879K0.1%+45.0%0.022%
6/4/2026Chelsea Counsel Co.16,000$568K0.2%N/A0.016%
6/3/2026NewEdge Advisors LLC26,273$932K0.0%+34.3%0.026%
5/28/2026Carlson Capital L.P.32,800$1.16M0.4%+2.5%0.033%
5/19/2026Bank of America Corp DE261,231$9.27M0.0%-58.4%0.262%
5/19/2026Edgestream Partners L.P.116,544$4.13M0.1%+306.2%0.117%
5/19/2026Janus Henderson Group PLC217,255$7.71M0.0%+393.6%0.218%
5/19/2026South Dakota Investment Council19,100$677K0.0%-46.8%0.019%
5/18/2026Amundi10,526$373K0.0%N/A0.011%
5/18/2026California State Teachers Retirement System119,621$4.24M0.0%+27.9%0.120%
5/18/2026Royal Bank of Canada1,048,210$37.18M0.0%-14.2%1.051%
5/18/2026Ranger Investment Management L.P.796,595$28.26M2.0%-0.8%0.799%
5/18/2026Empowered Funds LLC132,627$4.70M0.0%+2.2%0.133%
5/16/2026The Manufacturers Life Insurance Company44,888$1.59M0.0%-3.0%0.045%
5/16/2026Quantinno Capital Management LP18,588$659K0.0%+13.1%0.019%
5/15/2026Cannell & Spears LLC164,478$5.67M0.1%N/A0.165%
5/14/2026Renaissance Technologies LLC85,000$3.02M0.0%+202.5%0.085%
5/14/2026Gabelli Funds LLC182,025$6.46M0.0%-2.6%0.182%
5/14/2026Gamco Investors INC. ET AL338,298$12.00M0.1%-1.0%0.339%
5/14/2026Caxton Associates LLP28,094$996K0.0%-19.0%0.028%
5/14/2026Sei Investments Co.440,691$15.63M0.0%+5.2%0.442%
5/14/2026Lido Advisors LLC13,738$487K0.0%+13.1%0.014%
5/14/2026State of Wyoming15,099$536K0.1%+33.6%0.015%
5/13/2026Cetera Investment Advisers6,378$226K0.0%N/A0.006%
5/13/2026First Trust Advisors LP435,176$15.44M0.0%-22.6%0.436%
5/8/2026PNC Financial Services Group Inc.9,721$345K0.0%-9.3%0.010%
5/8/2026Amova Asset Management Americas Inc.27,018$959K0.0%+3.4%0.027%
5/7/2026Dimensional Fund Advisors LP3,461,749$122.78M0.0%-0.4%3.471%
5/6/2026Jennison Associates LLC60,012$2.13M0.0%-31.7%0.060%
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5/6/2026Gallacher Capital Management LLC10,231$363K0.1%-20.1%0.010%
5/5/2026Bank of New York Mellon Corp755,271$26.79M0.0%-1.9%0.757%
5/5/2026Illinois Municipal Retirement Fund51,096$1.81M0.0%+5.5%0.051%
5/5/2026Goehring & Rozencwajg Associates LLC713,586$25.31M1.4%+25.5%0.715%
5/5/2026Meridian Management Co.8,000$284K0.1%N/A0.008%
5/4/2026Legacy Capital Group California Inc.14,627$519K0.2%-27.6%0.015%
5/4/2026Bleakley Financial Group LLC19,614$696K0.0%+9.1%0.020%
5/4/2026Principal Financial Group Inc.585,358$20.76M0.0%+1.5%0.587%
5/1/2026Fifth Third Bancorp29,526$1.05M0.0%+6,782.5%0.030%
4/30/2026Hsbc Holdings PLC8,669$311K0.0%-77.1%0.009%


OII Institutional Ownership - Frequently Asked Questions

During the previous two years, 322 institutional investors and hedge funds held shares of Oceaneering International. The most heavily invested institutionals were BlackRock Inc. ($664.66M), Vanguard Group Inc. ($297.28M), Brown Advisory Inc. ($178.47M), Morgan Stanley Institutional Investment Advisors LLC ($124.24M), Dimensional Fund Advisors LP ($122.78M), State Street Corp ($111.67M), and Barrow Hanley Mewhinney & Strauss LLC ($92.10M).Learn more on Oceaneering International's institutional investors.

93.93% of Oceaneering International's stock is owned by institutional investors. Learn more on OII's institutional investor holdings.

Of the 279 institutional investors that purchased Oceaneering International's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: BlackRock Inc. ($16.40M), Morgan Stanley Institutional Investment Advisors LLC ($7.01M), Brown Advisory Inc. ($3.16M), Barrow Hanley Mewhinney & Strauss LLC ($2.27M), Congress Asset Management Co. ($1.79M), Reinhart Partners LLC. ($1.65M), and Old West Investment Management LLC ($1.30M).

Institutional investors have bought a total of 41,255,521 shares in the last 24 months. This purchase volume represents approximately $1.47B in transactions.

Of the 108 institutional investors that sold Oceaneering International's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Franklin Resources Inc. ($789.99K), Fort Washington Investment Advisors Inc. OH ($775.76K), Millennium Management LLC ($644.35K), Earnest Partners LLC ($427.79K), Aristotle Capital Boston LLC ($420.26K), Algert Global LLC ($399.09K), and Bank of America Corp DE ($366.70K).

Institutional investors have sold a total of 8,044,535 shares in the last 24 months. This volume of shares sold represents approximately $223.04M in transactions.


Related Companies

Institutional ownership data for NYSE:OII is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 10/10/2026. New 13F filings are added each quarter as they're published.
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