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Oceaneering International (OII) Institutional Ownership

Oceaneering International logo
$50.62 -0.59 (-1.15%)
As of 08/28/2026 03:58 PM Eastern
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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)
182
Total
Institutional Inflows
(last 12 months)
$1.65B
Number of
Institutional Sellers
(last 12 months)
109
Total
Institutional Outflows
(last 12 months)
$223.57M
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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
8/27/2026 Corient Private Wealth LP16,227$658K0.0%+50.0%0.016%
8/26/2026 Amundi19,778$801K0.0%+87.9%0.020%
8/26/2026 HighTower Advisors LLC16,564$671K0.0%-45.3%0.017%
8/25/2026 VIRGINIA RETIREMENT SYSTEMS ET Al6,600$267K0.0%N/A0.007%
8/24/2026 California State Teachers Retirement System4,711,585$190.91M0.0%+3,838.8%4.734%
8/22/2026 Compass Financial Management LLC4,984$202K0.0%N/A0.005%
8/22/2026 Concurrent Investment Advisors LLC131,457$5.33M0.0%+12.8%0.132%
8/21/2026 Round Rock Advisors LLC20,056$813K0.1%+15.9%0.020%
8/21/2026 Nykredit A S7,092$287K0.0%N/A0.007%
8/20/2026 Sigma Planning Corp11,376$461K0.0%N/A0.011%
8/20/2026 Hennessy Advisors Inc.267,086$10.82M0.3%N/A0.268%
8/19/2026 UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC162,283$6.58M0.0%-45.8%0.163%
8/19/2026 Van ECK Associates Corp1,849,926$74.96M0.0%-10.3%1.859%
8/18/2026 Empowered Funds LLC134,103$5.43M0.0%N/A0.135%
8/18/2026 Public Employees Retirement System of Ohio1,334$54K0.0%N/A0.001%
8/17/2026 Capstone Investment Advisors LLC25,094$1.02M0.0%N/A0.025%
8/17/2026 Corient Private Wealth LP10,415$422K0.0%N/A0.010%
8/17/2026 Bank of America Corp DE364,827$14.78M0.0%N/A0.367%
8/15/2026 Jupiter Topco LLC156,318$6.33M0.0%N/A0.157%
8/14/2026 EFG International AG91,994$3.73M0.1%N/A0.092%
8/14/2026 PDT Partners LLC12,188$494K0.0%N/A0.012%
8/14/2026 Canada Pension Plan Investment Board18,400$746K0.0%N/A0.018%
8/14/2026 Manatuck Hill Partners LLC160,600$6.51M2.2%N/A0.161%
8/14/2026 Legal & General Group Plc242,503$9.83M0.0%N/A0.244%
8/14/2026 The Manufacturers Life Insurance Company 49,067$1.99M0.0%N/A0.049%
8/14/2026 Algert Global LLC53,793$2.18M0.0%-88.1%0.054%
8/13/2026 Morgan Stanley Institutional Investment Advisors LLC3,066,015$124.24M11.6%N/A3.080%
8/13/2026 Ranger Investment Management L.P.777,643$31.51M2.0%N/A0.781%
8/13/2026 Barrow Hanley Mewhinney & Strauss LLC2,272,949$92.10M0.3%N/A2.284%
8/13/2026 Globeflex Capital L P7,283$295K0.0%N/A0.007%
8/12/2026 Compass Financial Management LLC4,984$251K0.0%N/A0.005%
8/12/2026 Commerce Bank8,560$347K0.0%N/A0.009%
8/12/2026 Evolve Private Wealth LLC17,116$694K0.0%N/A0.017%
8/12/2026 EP Wealth Advisors LLC21,106$855K0.0%N/A0.021%
8/12/2026 Callan Family Office LLC11,171$453K0.0%N/A0.011%
8/11/2026 Allworth Financial LP1,046$42K0.0%N/A0.001%
8/11/2026 Vise Technologies Inc.16,231$658K0.0%N/A0.016%
8/10/2026 Great Lakes Advisors LLC10,987$445K0.0%N/A0.011%
8/7/2026 BlackRock Inc.16,403,230$664.66M0.0%N/A16.481%
8/7/2026 Deutsche Bank AG104,689$4.24M0.0%N/A0.105%
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8/7/2026 Mitsubishi UFJ Asset Management Co. Ltd.71,302$2.89M0.0%N/A0.072%
8/7/2026 Persistent Asset Partners Ltd1,635$66K0.0%N/A0.002%
8/7/2026 Old West Investment Management LLC693,549$28.10M3.0%N/A0.697%
8/6/2026 Bank of New York Mellon Corp1,126,793$45.66M0.0%N/A1.132%
8/6/2026 State of Wyoming7,762$315K0.0%N/A0.008%
8/3/2026 Oppenheimer Asset Management Inc.70,143$2.84M0.0%N/A0.070%
8/3/2026 Dockside LLC38,430$1.56M0.4%N/A0.039%
7/10/2026 Annex Advisory Services LLC67,302$2.73M0.0%+29.3%0.067%
7/8/2026 Reinhart Partners LLC.1,648,423$66.80M1.5%N/A1.653%
7/7/2026 GAMMA Investing LLC5,124$208K0.0%+27.1%0.005%
7/7/2026 Central Pacific Bank Trust Division21,696$879K0.1%+45.0%0.022%
6/4/2026 Chelsea Counsel Co.16,000$568K0.2%N/A0.016%
6/3/2026 NewEdge Advisors LLC26,273$932K0.0%+34.3%0.026%
5/28/2026 Carlson Capital L.P.32,800$1.16M0.4%+2.5%0.033%
5/19/2026 Bank of America Corp DE261,231$9.27M0.0%-58.4%0.262%
5/19/2026 Edgestream 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%
5/19/2026 South Dakota Investment Council19,100$677K0.0%-46.8%0.019%
5/18/2026 Amundi10,526$373K0.0%N/A0.011%
5/18/2026 California State Teachers Retirement System119,621$4.24M0.0%+27.9%0.120%
5/18/2026 Royal Bank of Canada1,048,210$37.18M0.0%-14.2%1.051%
5/18/2026 Ranger Investment Management L.P.796,595$28.26M2.0%-0.8%0.799%
5/18/2026 Empowered Funds LLC132,627$4.70M0.0%+2.2%0.133%
5/16/2026 The Manufacturers Life Insurance Company44,888$1.59M0.0%-3.0%0.045%
5/16/2026 Quantinno Capital Management LP18,588$659K0.0%+13.1%0.019%
5/15/2026 Cannell & Spears LLC164,478$5.67M0.1%N/A0.165%
5/14/2026 Renaissance Technologies LLC85,000$3.02M0.0%+202.5%0.085%
5/14/2026 Gabelli Funds LLC182,025$6.46M0.0%-2.6%0.182%
5/14/2026 Gamco Investors INC. ET AL338,298$12.00M0.1%-1.0%0.339%
5/14/2026 Caxton Associates LLP28,094$996K0.0%-19.0%0.028%
5/14/2026 Sei Investments Co.440,691$15.63M0.0%+5.2%0.442%
5/14/2026 Lido Advisors LLC13,738$487K0.0%+13.1%0.014%
5/14/2026 State of Wyoming15,099$536K0.1%+33.6%0.015%
5/13/2026 Cetera Investment Advisers6,378$226K0.0%N/A0.006%
5/13/2026 First Trust Advisors LP435,176$15.44M0.0%-22.6%0.436%
5/8/2026 PNC Financial Services Group Inc.9,721$345K0.0%-9.3%0.010%
5/8/2026 Amova Asset Management Americas Inc.27,018$959K0.0%+3.4%0.027%
5/7/2026 Dimensional Fund Advisors LP3,461,749$122.78M0.0%-0.4%3.471%
5/6/2026 Jennison Associates LLC60,012$2.13M0.0%-31.7%0.060%
5/6/2026 Gallacher Capital Management LLC10,231$363K0.1%-20.1%0.010%
5/5/2026 Bank of New York Mellon Corp755,271$26.79M0.0%-1.9%0.757%
5/5/2026 Illinois Municipal Retirement Fund51,096$1.81M0.0%+5.5%0.051%
5/5/2026 Goehring & Rozencwajg Associates LLC713,586$25.31M1.4%+25.5%0.715%
5/5/2026 Meridian Management Co.8,000$284K0.1%N/A0.008%
5/4/2026 Legacy Capital Group California Inc.14,627$519K0.2%-27.6%0.015%
5/4/2026 Bleakley Financial Group LLC19,614$696K0.0%+9.1%0.020%
5/4/2026 Principal Financial Group Inc.585,358$20.76M0.0%+1.5%0.587%
5/1/2026 Fifth Third Bancorp29,526$1.05M0.0%+6,782.5%0.030%
4/30/2026 Hsbc Holdings PLC8,669$311K0.0%-77.1%0.009%
4/30/2026 Kestra Advisory Services LLC48,437$1.72M0.0%-14.5%0.049%
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4/30/2026 Granite Investment Partners LLC327,053$11.60M0.7%+37.2%0.328%
4/30/2026 Sumitomo Mitsui Trust Group Inc.27,018$958K0.0%+3.4%0.027%
4/30/2026 Isthmus Partners LLC96,364$3.42M0.4%-1.3%0.097%
4/28/2026 Abel Hall LLC6,581$233K0.0%N/A0.007%
4/28/2026 Whittier Trust Co. of Nevada Inc.1,450$53K0.0%N/A0.001%
4/28/2026 K.J. Harrison & Partners Inc11,600$411K0.1%N/A0.012%
4/28/2026 QRG Capital Management Inc.21,263$754K0.0%N/A0.021%
4/27/2026 New York State Teachers Retirement System158,664$5.63M0.0%-3.4%0.159%
4/27/2026 Y Intercept Hong Kong Ltd62,516$2.22M0.0%-26.1%0.063%
4/25/2026 Strs Ohio22,200$787K0.0%+22,100.0%0.022%


OII Institutional Ownership - Frequently Asked Questions

During the previous two years, 319 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), California State Teachers Retirement System ($190.91M), Brown Advisory Inc. ($178.47M), Morgan Stanley Institutional Investment Advisors LLC ($124.24M), Dimensional Fund Advisors LP ($122.78M), and State Street Corp ($111.67M).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 276 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), California State Teachers Retirement System ($4.62M), Brown Advisory Inc. ($3.16M), Barrow Hanley Mewhinney & Strauss LLC ($2.27M), Congress Asset Management Co. ($1.79M), and Reinhart Partners LLC. ($1.65M).

Institutional investors have bought a total of 45,804,753 shares in the last 24 months. This purchase volume represents approximately $1.65B in transactions.

Of the 109 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 8,067,342 shares in the last 24 months. This volume of shares sold represents approximately $223.57M in transactions.


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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 8/27/2026. New 13F filings are added each quarter as they're published.
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