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Oceaneering International (OII) Institutional Ownership

Oceaneering International logo
$50.46 +2.49 (+5.18%)
As of 01:45 PM 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)
178
Total
Institutional Inflows
(last 12 months)
$1.23B
Number of
Institutional Sellers
(last 12 months)
116
Total
Institutional Outflows
(last 12 months)
$213.20M
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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
8/10/2026Great 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%
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%
6/4/2026Chelsea 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%
5/14/2026 Lido Advisors LLC13,738$487K0.0%+13.1%0.014%
5/14/2026 State of Wyoming15,099$536K0.1%+33.6%0.015%
5/13/2026Cetera Investment Advisers6,378$226K0.0%N/A0.006%
5/13/2026First Trust Advisors LP435,176$15.44M0.0%-22.6%0.436%
5/8/2026 PNC 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%
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5/7/2026Dimensional 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%
5/5/2026Illinois 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%
4/30/2026Hsbc Holdings PLC8,669$311K0.0%-77.1%0.009%
4/30/2026 Kestra Advisory Services LLC48,437$1.72M0.0%-14.5%0.049%
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%
4/25/2026 Boston Trust Walden Corp519,477$18.43M0.2%-2.4%0.521%
4/23/2026Inspire Investing LLC18,806$667K0.1%-20.4%0.019%
4/22/2026 Janney 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%
4/22/2026 Pictet Asset Management Holding SA16,345$580K0.0%+32.6%0.016%
4/22/2026 Sterling Capital Management LLC947$34K0.0%-22.5%0.001%
4/21/2026 Louisiana State Employees Retirement System44,200$1.57M0.0%N/A0.044%
4/17/2026 Andina Capital Management LLC14,766$524K0.5%N/A0.015%
4/16/2026 SG 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%
2/18/2026 Old 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%
DOJ Admits It In Court—Your Cash Can Be Seized Without Warning (Ad)

The Department of Justice recently argued in court that cash may not be legally your property - raising concerns about government authority to freeze or seize private accounts. Greece raided pensions. Cyprus drained bank accounts. Poland seized retirement funds. Priority Gold has put together a free Wealth Defense Guide for Americans looking to move assets beyond potential government reach.tc pixel

Download your free Wealth Defense Guide and review your options today
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%


OII Institutional Ownership - Frequently Asked Questions

During the previous two years, 304 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), Dimensional Fund Advisors LP ($122.78M), State Street Corp ($111.67M), Morgan Stanley Institutional Investment Advisors LLC ($94.85M), and Earnest Partners LLC ($91.11M).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 258 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 ($3.95M), Brown Advisory Inc. ($3.16M), Congress Asset Management Co. ($1.79M), Reinhart Partners LLC. ($1.65M), Old West Investment Management LLC ($1.30M), and Balyasny Asset Management L.P. ($1.23M).

Institutional investors have bought a total of 37,177,828 shares in the last 24 months. This purchase volume represents approximately $1.23B in transactions.

Of the 116 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 8,293,682 shares in the last 24 months. This volume of shares sold represents approximately $213.20M 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 8/10/2026. New 13F filings are added each quarter as they're published.
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