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Oceaneering International (OII) Institutional Ownership

Oceaneering International logo
$43.70 +0.89 (+2.07%)
As of 10:06 AM Eastern
This is a fair market value 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)
180
Total
Institutional Inflows
(last 12 months)
$493.37M
Number of
Institutional Sellers
(last 12 months)
125
Total
Institutional Outflows
(last 12 months)
$219.87M
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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
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%
6/4/2026Chelsea 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 Company 44,888$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%
5/6/2026 Gallacher 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%
Trump Takes Emergency Action - Plus Elon Musk's New Venture (Ad)

Elon Musk has quietly launched a new venture - one that has nothing to do with rockets, EVs, or Neuralink. Trump has issued emergency support to accelerate the rollout, and it's already live in multiple states. The Financial Times reports Sam Altman is personally calling people to build this for OpenAI. A few little-known companies control the entire supply chain - meaning anyone who wants access must go through them. Their stocks are available to buy right now.tc pixel

See which companies control the supply chain behind this emerging tech
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%
4/30/2026Kestra Advisory Services LLC48,437$1.72M0.0%-14.5%0.049%
4/30/2026Granite Investment Partners LLC327,053$11.60M0.7%+37.2%0.328%
4/30/2026Sumitomo Mitsui Trust Group Inc.27,018$958K0.0%+3.4%0.027%
4/30/2026Isthmus Partners LLC96,364$3.42M0.4%-1.3%0.097%
4/28/2026Abel Hall LLC6,581$233K0.0%N/A0.007%
4/28/2026Whittier Trust Co. of Nevada Inc.1,450$53K0.0%N/A0.001%
4/28/2026K.J. Harrison & Partners Inc11,600$411K0.1%N/A0.012%
4/28/2026 QRG Capital Management Inc.21,263$754K0.0%N/A0.021%
4/27/2026New 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%
4/25/2026Strs Ohio22,200$787K0.0%+22,100.0%0.022%
4/25/2026Boston Trust Walden Corp519,477$18.43M0.2%-2.4%0.521%
4/23/2026Inspire Investing LLC18,806$667K0.1%-20.4%0.019%
4/22/2026Janney Montgomery Scott LLC14,215$504K0.0%N/A0.014%
4/22/2026 Fort Washington Investment Advisors Inc. OH526,034$18.66M0.1%-38.6%0.527%
4/22/2026Pictet Asset Management Holding SA16,345$580K0.0%+32.6%0.016%
4/22/2026Sterling Capital Management LLC947$34K0.0%-22.5%0.001%
4/21/2026Louisiana State Employees Retirement System44,200$1.57M0.0%N/A0.044%
4/17/2026Andina Capital Management LLC14,766$524K0.5%N/A0.015%
4/16/2026SG Americas Securities LLC8,763$311K0.0%-94.3%0.009%
4/16/2026 Diversified Trust Co20,781$737K0.0%+21.7%0.021%
3/20/2026Hsbc Holdings PLC37,913$919K0.0%-35.5%0.038%
3/17/2026Rockefeller Capital Management L.P.3,069$74K0.0%+297.0%0.003%
3/9/2026Corient Private Wealth LLC12,600$303K0.0%+21.7%0.013%
2/19/2026Invesco Ltd.597,363$14.36M0.0%-2.7%0.599%
2/19/2026Corient Private Wealth LLC12,440$299K0.0%+20.1%0.012%
2/18/2026State of Tennessee Department of Treasury52,577$1.26M0.0%+7.2%0.053%
2/18/2026EP Wealth Advisors LLC26,225$630K0.0%N/A0.026%
2/18/2026Mackenzie Financial Corp15,246$370K0.0%+9.1%0.015%
2/18/2026NewEdge Advisors LLC19,560$470K0.0%+2.9%0.020%
2/18/2026Empowered Funds LLC129,747$3.12M0.0%+3.6%0.130%
2/18/2026XTX Topco Ltd33,629$808K0.0%N/A0.034%
2/18/2026Tudor Investment Corp ET AL539,676$12.97M0.0%+9.7%0.541%
2/18/2026Old West Investment Management LLC543,271$13.06M2.3%+128.2%0.544%
2/18/2026Millennium Management LLC88,022$2.12M0.0%-59.0%0.088%
2/18/2026Man Group plc19,346$465K0.0%+8.5%0.019%
2/18/2026Manatuck Hill Partners LLC10,600$255K0.1%-73.5%0.011%
2/18/2026Inspire Investing LLC23,622$568K0.1%+4.0%0.024%
2/18/2026Gotham Asset Management LLC46,410$1.12M0.0%N/A0.047%
2/18/2026Engineers Gate Manager LP88,549$2.13M0.0%-32.2%0.089%
2/18/2026Aristotle Capital Boston LLC450,306$10.82M0.6%-46.6%0.451%
2/18/2026Balyasny Asset Management L.P.10,122$243K0.0%-95.3%0.010%
2/18/2026Bridgeway Capital Management LLC93,600$2.25M0.0%-5.0%0.094%
2/17/2026Guggenheim Capital LLC9,936$239K0.0%-9.8%0.010%
2/17/2026Schonfeld Strategic Advisors LLC35,082$843K0.0%-65.7%0.035%
2/17/2026AQR Capital Management LLC372,749$8.96M0.0%+23.1%0.374%
2/17/2026EFG International AG152,292$3.66M0.1%N/A0.153%
2/17/2026Sagefield Capital LP380,070$9.13M0.8%-25.4%0.381%
Trump Takes Emergency Action - Plus Elon Musk's New Venture (Ad)

Elon Musk has quietly launched a new venture - one that has nothing to do with rockets, EVs, or Neuralink. Trump has issued emergency support to accelerate the rollout, and it's already live in multiple states. The Financial Times reports Sam Altman is personally calling people to build this for OpenAI. A few little-known companies control the entire supply chain - meaning anyone who wants access must go through them. Their stocks are available to buy right now.tc pixel

See which companies control the supply chain behind this emerging tech
2/17/2026Trexquant Investment LP112,759$2.71M0.0%+276.4%0.113%
2/17/2026Price T Rowe Associates Inc. MD101,308$2.44M0.0%+8.9%0.102%
2/17/2026Tannin Capital LLC9,964$239K0.2%N/A0.010%
2/17/2026Osaic Holdings Inc.27,404$659K0.0%-5.8%0.027%
2/17/2026Russell Investments Group Ltd.268,176$6.44M0.0%+4.7%0.269%
2/17/2026State of Wisconsin Investment Board261,453$6.28M0.0%+7.8%0.262%
2/17/2026Captrust Financial Advisors14,436$347K0.0%-33.7%0.014%
2/17/2026ExodusPoint Capital Management LP34,827$837K0.0%-78.2%0.035%
2/17/2026Royal Bank of Canada1,221,789$29.36M0.0%-5.2%1.224%
2/17/2026Aster Capital Management DIFC Ltd3,325$80K0.0%N/A0.003%


OII Institutional Ownership - Frequently Asked Questions

During the previous two years, 307 institutional investors and hedge funds held shares of Oceaneering International. The most heavily invested institutionals were Vanguard Group Inc. ($297.28M), Brown Advisory Inc. ($178.47M), Dimensional Fund Advisors LP ($122.78M), State Street Corp ($111.67M), Morgan Stanley Institutional Investment Advisors LLC ($94.85M), Earnest Partners LLC ($91.11M), and American Century Companies Inc. ($90.27M).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 259 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: Morgan Stanley Institutional Investment Advisors LLC ($3.95M), Brown Advisory Inc. ($3.16M), Congress Asset Management Co. ($1.79M), Reinhart Partners LLC. ($1.65M), American Century Companies Inc. ($1.40M), Balyasny Asset Management L.P. ($1.23M), and Earnest Partners LLC ($1.11M).

Institutional investors have bought a total of 19,382,230 shares in the last 24 months. This purchase volume represents approximately $493.37M in transactions.

Of the 125 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. ($882.96K), Fort Washington Investment Advisors Inc. OH ($775.76K), Millennium Management LLC ($644.35K), JPMorgan Chase & Co. ($455.78K), Earnest Partners LLC ($427.79K), Aristotle Capital Boston LLC ($420.26K), and Bank of America Corp DE ($396.98K).

Institutional investors have sold a total of 8,615,306 shares in the last 24 months. This volume of shares sold represents approximately $219.87M in transactions.


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This page (NYSE:OII) was last updated on 7/21/2026 by MarketBeat.com Staff.
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