Oceaneering International (OII) Institutional Ownership

$46.37 +0.17 (+0.37%)

Closing price 09/18/2026 03:59 PM Eastern

Extended Trading

$46.48 +0.11 (+0.24%)

As of 09/18/2026 07:30 PM Eastern

Compare

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

Get OII Insider Trade Alerts

Want to know when executives and insiders are buying or selling Oceaneering International stock? Sign up for InsiderTrades.com's daily newsletter to get the latest insider transactions delivered to your inbox daily.

Subscribe Now

SMS is currently available in Australia, Belgium, Canada, France, Germany, Ireland, Italy, New Zealand, the Netherlands, Singapore, South Africa, Spain, Switzerland, the United Kingdom, and the United States. By entering your phone number and clicking the sign-up button, you agree to receive periodic text messages from MarketBeat at the phone number you submitted, including texts that may be sent using an automatic telephone dialing system. Message and data rates may apply. Message frequency will vary. Messages will consist of stock alerts, news stories, and partner advertisements/offers. Consent is not a condition of the purchase of any goods or services. Text HELP for help/customer support. Unsubscribe at any time by replying "STOP" to any text message that you receive from MarketBeat or by visiting our mailing preferences page. Read our full terms of service and privacy policy.

OII Institutional Buying and Selling by Quarter

Oceaneering International Major Shareholders & Ownership History

Export

Reporting Date	Major Shareholder Name	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
9/9/2026	Sequoia Financial Advisors LLC	5,528	$224K	0.0%	N/A	0.006%
9/9/2026	Tidal Investments LLC	30,209	$1.22M	0.0%	+8.4%	0.030%
9/9/2026	WINTON GROUP Ltd	37,534	$1.52M	0.0%	-6.2%	0.038%
9/9/2026	Integrated Wealth Concepts LLC	859	$35K	0.0%	N/A	0.001%
9/9/2026	NewEdge Advisors LLC	32,640	$1.32M	0.0%	+24.2%	0.033%
9/9/2026	IFP Advisors Inc	5,491	$222K	0.0%	+80.2%	0.006%
9/9/2026	Squarepoint Ops LLC	62,023	$2.51M	0.0%	+74.5%	0.062%
9/8/2026	Allworth Financial LP	1,046	$42K	0.0%	+63.2%	0.001%
9/8/2026	Nykredit A S	7,092	$287K	0.0%	N/A	0.007%
8/27/2026	Corient Private Wealth LP	16,227	$658K	0.0%	+50.0%	0.016%
Get the Latest News and Ratings for OII and Related Stocks Enter your email address below to receive the latest news and analysts' ratings for Oceaneering International and its competitors with MarketBeat's FREE daily newsletter.
8/26/2026	Amundi	19,778	$801K	0.0%	+87.9%	0.020%
8/26/2026	HighTower Advisors LLC	16,564	$671K	0.0%	-45.3%	0.017%
8/25/2026	VIRGINIA RETIREMENT SYSTEMS ET Al	6,600	$267K	0.0%	N/A	0.007%
8/22/2026	Compass Financial Management LLC	4,984	$202K	0.0%	N/A	0.005%
8/22/2026	Concurrent Investment Advisors LLC	131,457	$5.33M	0.0%	+12.8%	0.132%
8/21/2026	Round Rock Advisors LLC	20,056	$813K	0.1%	+15.9%	0.020%
8/21/2026	Nykredit A S	7,092	$287K	0.0%	N/A	0.007%
8/20/2026	Sigma Planning Corp	11,376	$461K	0.0%	N/A	0.011%
8/20/2026	Hennessy Advisors Inc.	267,086	$10.82M	0.3%	N/A	0.268%
8/19/2026	UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	162,283	$6.58M	0.0%	-45.8%	0.163%
8/19/2026	Van ECK Associates Corp	1,849,926	$74.96M	0.0%	-10.3%	1.859%
8/18/2026	Empowered Funds LLC	134,103	$5.43M	0.0%	N/A	0.135%
8/18/2026	Public Employees Retirement System of Ohio	1,334	$54K	0.0%	N/A	0.001%
8/17/2026	Capstone Investment Advisors LLC	25,094	$1.02M	0.0%	N/A	0.025%
8/17/2026	Corient Private Wealth LP	10,415	$422K	0.0%	N/A	0.010%
8/17/2026	Bank of America Corp DE	364,827	$14.78M	0.0%	N/A	0.367%
8/15/2026	Jupiter Topco LLC	156,318	$6.33M	0.0%	N/A	0.157%
8/14/2026	EFG International AG	91,994	$3.73M	0.1%	N/A	0.092%
8/14/2026	PDT Partners LLC	12,188	$494K	0.0%	N/A	0.012%
8/14/2026	Canada Pension Plan Investment Board	18,400	$746K	0.0%	N/A	0.018%
8/14/2026	Manatuck Hill Partners LLC	160,600	$6.51M	2.2%	N/A	0.161%
8/14/2026	Legal & General Group Plc	242,503	$9.83M	0.0%	N/A	0.244%
8/14/2026	The Manufacturers Life Insurance Company	49,067	$1.99M	0.0%	N/A	0.049%
8/14/2026	Algert Global LLC	53,793	$2.18M	0.0%	-88.1%	0.054%
8/13/2026	Morgan Stanley Institutional Investment Advisors LLC	3,066,015	$124.24M	11.6%	N/A	3.080%
8/13/2026	Ranger Investment Management L.P.	777,643	$31.51M	2.0%	N/A	0.781%
8/13/2026	Barrow Hanley Mewhinney & Strauss LLC	2,272,949	$92.10M	0.3%	N/A	2.284%
8/13/2026	Globeflex Capital L P	7,283	$295K	0.0%	N/A	0.007%
8/12/2026	Compass Financial Management LLC	4,984	$251K	0.0%	N/A	0.005%
8/12/2026	Commerce Bank	8,560	$347K	0.0%	N/A	0.009%
Small Colorado Company (Backed by Sam Altman) Could Save U.S. Power Grid (Ad) A small Colorado company has secured rights to technology that could prevent the U.S. public power grid from collapsing — and billionaire Sam Altman is now an investor. This under-the-radar firm is drawing serious attention from those watching the energy infrastructure space closely. Click here to learn this company's name for free today
8/12/2026	Evolve Private Wealth LLC	17,116	$694K	0.0%	N/A	0.017%
8/12/2026	EP Wealth Advisors LLC	21,106	$855K	0.0%	N/A	0.021%
8/12/2026	Callan Family Office LLC	11,171	$453K	0.0%	N/A	0.011%
8/11/2026	Allworth Financial LP	1,046	$42K	0.0%	N/A	0.001%
8/11/2026	Vise Technologies Inc.	16,231	$658K	0.0%	N/A	0.016%
8/10/2026	Great Lakes Advisors LLC	10,987	$445K	0.0%	N/A	0.011%
8/7/2026	BlackRock Inc.	16,403,230	$664.66M	0.0%	N/A	16.481%
8/7/2026	Deutsche Bank AG	104,689	$4.24M	0.0%	N/A	0.105%
8/7/2026	Mitsubishi UFJ Asset Management Co. Ltd.	71,302	$2.89M	0.0%	N/A	0.072%
8/7/2026	Persistent Asset Partners Ltd	1,635	$66K	0.0%	N/A	0.002%
8/7/2026	Old West Investment Management LLC	693,549	$28.10M	3.0%	N/A	0.697%
8/6/2026	Bank of New York Mellon Corp	1,126,793	$45.66M	0.0%	N/A	1.132%
8/6/2026	State of Wyoming	7,762	$315K	0.0%	N/A	0.008%
8/3/2026	Oppenheimer Asset Management Inc.	70,143	$2.84M	0.0%	N/A	0.070%
8/3/2026	Dockside LLC	38,430	$1.56M	0.4%	N/A	0.039%
7/10/2026	Annex Advisory Services LLC	67,302	$2.73M	0.0%	+29.3%	0.067%
7/8/2026	Reinhart Partners LLC.	1,648,423	$66.80M	1.5%	N/A	1.653%
7/7/2026	GAMMA Investing LLC	5,124	$208K	0.0%	+27.1%	0.005%
7/7/2026	Central Pacific Bank Trust Division	21,696	$879K	0.1%	+45.0%	0.022%
6/4/2026	Chelsea Counsel Co.	16,000	$568K	0.2%	N/A	0.016%
6/3/2026	NewEdge Advisors LLC	26,273	$932K	0.0%	+34.3%	0.026%
5/28/2026	Carlson Capital L.P.	32,800	$1.16M	0.4%	+2.5%	0.033%
5/19/2026	Bank of America Corp DE	261,231	$9.27M	0.0%	-58.4%	0.262%
5/19/2026	Edgestream Partners L.P.	116,544	$4.13M	0.1%	+306.2%	0.117%
5/19/2026	Janus Henderson Group PLC	217,255	$7.71M	0.0%	+393.6%	0.218%
5/19/2026	South Dakota Investment Council	19,100	$677K	0.0%	-46.8%	0.019%
5/18/2026	Amundi	10,526	$373K	0.0%	N/A	0.011%
5/18/2026	California State Teachers Retirement System	119,621	$4.24M	0.0%	+27.9%	0.120%
5/18/2026	Royal Bank of Canada	1,048,210	$37.18M	0.0%	-14.2%	1.051%
5/18/2026	Ranger Investment Management L.P.	796,595	$28.26M	2.0%	-0.8%	0.799%
5/18/2026	Empowered Funds LLC	132,627	$4.70M	0.0%	+2.2%	0.133%
5/16/2026	The Manufacturers Life Insurance Company	44,888	$1.59M	0.0%	-3.0%	0.045%
5/16/2026	Quantinno Capital Management LP	18,588	$659K	0.0%	+13.1%	0.019%
5/15/2026	Cannell & Spears LLC	164,478	$5.67M	0.1%	N/A	0.165%
5/14/2026	Renaissance Technologies LLC	85,000	$3.02M	0.0%	+202.5%	0.085%
5/14/2026	Gabelli Funds LLC	182,025	$6.46M	0.0%	-2.6%	0.182%
5/14/2026	Gamco Investors INC. ET AL	338,298	$12.00M	0.1%	-1.0%	0.339%
5/14/2026	Caxton Associates LLP	28,094	$996K	0.0%	-19.0%	0.028%
5/14/2026	Sei Investments Co.	440,691	$15.63M	0.0%	+5.2%	0.442%
5/14/2026	Lido Advisors LLC	13,738	$487K	0.0%	+13.1%	0.014%
5/14/2026	State of Wyoming	15,099	$536K	0.1%	+33.6%	0.015%
5/13/2026	Cetera Investment Advisers	6,378	$226K	0.0%	N/A	0.006%
5/13/2026	First Trust Advisors LP	435,176	$15.44M	0.0%	-22.6%	0.436%
5/8/2026	PNC Financial Services Group Inc.	9,721	$345K	0.0%	-9.3%	0.010%
5/8/2026	Amova Asset Management Americas Inc.	27,018	$959K	0.0%	+3.4%	0.027%
5/7/2026	Dimensional Fund Advisors LP	3,461,749	$122.78M	0.0%	-0.4%	3.471%
5/6/2026	Jennison Associates LLC	60,012	$2.13M	0.0%	-31.7%	0.060%
5/6/2026	Gallacher Capital Management LLC	10,231	$363K	0.1%	-20.1%	0.010%
5/5/2026	Bank of New York Mellon Corp	755,271	$26.79M	0.0%	-1.9%	0.757%
5/5/2026	Illinois Municipal Retirement Fund	51,096	$1.81M	0.0%	+5.5%	0.051%
Ticker Revealed: Pre-IPO Access to "Next Elon Musk" Company (Ad) We’ve found The Next Elon Musk… and what we believe to be the next Tesla. It’s already racked up $26 billion in government contracts. Peter Thiel just bet $1 Billion on it. 👉 Unlock the ticker now and get it completely free.
5/5/2026	Goehring & Rozencwajg Associates LLC	713,586	$25.31M	1.4%	+25.5%	0.715%
5/5/2026	Meridian Management Co.	8,000	$284K	0.1%	N/A	0.008%
5/4/2026	Legacy Capital Group California Inc.	14,627	$519K	0.2%	-27.6%	0.015%
5/4/2026	Bleakley Financial Group LLC	19,614	$696K	0.0%	+9.1%	0.020%
5/4/2026	Principal Financial Group Inc.	585,358	$20.76M	0.0%	+1.5%	0.587%
5/1/2026	Fifth Third Bancorp	29,526	$1.05M	0.0%	+6,782.5%	0.030%
4/30/2026	Hsbc Holdings PLC	8,669	$311K	0.0%	-77.1%	0.009%
4/30/2026	Kestra Advisory Services LLC	48,437	$1.72M	0.0%	-14.5%	0.049%
4/30/2026	Granite Investment Partners LLC	327,053	$11.60M	0.7%	+37.2%	0.328%
4/30/2026	Sumitomo Mitsui Trust Group Inc.	27,018	$958K	0.0%	+3.4%	0.027%

OII Institutional Ownership - Frequently Asked Questions

During the previous two years, 321 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 278 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 41,262,082 shares in the last 24 months. This purchase volume represents approximately $1.47B 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 8,069,806 shares in the last 24 months. This volume of shares sold represents approximately $223.67M 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 9/9/2026. New 13F filings are added each quarter as they're published.

From Our Partners

Unlock superior investment research and tools.

Get MarketBeat All Access

In-depth profiles and analysis for 20,000 public companies.
Real-time analyst ratings, insider transactions, earnings data, and more.
Our daily ratings and market update email newsletter.

Sign In
Create Account

Your Email Address:

Your Password:

Forgot your password?

Your Email Address:

Choose a Password:

By creating a free account, you agree to our terms of service. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Oceaneering International (OII) Institutional Ownership

OII Institutional Buying and Selling by Quarter

Oceaneering International Major Shareholders & Ownership History

OII Institutional Ownership - Frequently Asked Questions

Best-in-Class Portfolio Monitoring

Stock Ideas and Recommendations

Advanced Stock Screeners and Research Tools

About MarketBeat

MarketBeat Products

Popular Tools

Financial Calendars

Terms & Info

Oceaneering International (OII) Institutional Ownership

Institutional Ownership Changes (13F Filings) for Oceaneering International (NYSE:OII)

OII Institutional Buying and Selling by Quarter

Oceaneering International Major Shareholders & Ownership History

OII Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of OII shares?

What percentage of Oceaneering International's stock is owned by institutional investors?

Which institutional investors have been buying Oceaneering International's stock?

How much institutional buying is happening at Oceaneering International?

Which of Oceaneering International's major shareholders have been selling company stock?

How much institutional selling is happening at Oceaneering International?

MarketBeat All Access Features

Best-in-Class Portfolio Monitoring

Stock Ideas and Recommendations

Advanced Stock Screeners and Research Tools