Oceaneering Ownership | Who Owns Oceaneering?

Overview Forecast RevenueFinancials Chart Transcripts

Oceaneering Ownership Summary

Oceaneering is owned by 29.86% institutional investors, 1.36% insiders, and 68.78% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 16.23% of OII shares. iShares Core S&P Small-Cap ETF is the top mutual fund, with 6.03% of its assets in Oceaneering shares.

OII Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Oceaneering	29.86%	1.36%	68.78%
Sector	Energy Stocks	44.02%	15.47%	40.51%
Industry	Oil & Gas Equipment & Services Stocks	43.51%	16.53%	39.96%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock funding, inc. /de	16.35M	16.23%	$579.89M
Blackrock	15.81M	15.65%	$374.10M
Vanguard group	12.37M	12.37%	$297.28M
Brown advisory	5.79M	5.74%	$205.32M
State street	5.03M	5.00%	$178.56M
American century companies	3.77M	3.74%	$133.60M
Earnest partners	3.68M	3.66%	$130.68M
Dimensional fund advisors lp	3.46M	3.44%	$122.78M
Morgan stanley institutional investment advisors	3.45M	3.43%	$122.48M
Neuberger berman group	3.22M	3.19%	$114.15M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Morgan stanley institutional investment advisors	3.45M	11.81%	$122.48M
Archon capital management	208.00K	4.16%	$7.38M
Keating investment counselors	333.78K	3.71%	$13.52M
Greenhouse funds lllp	2.03M	3.23%	$72.09M
Old west investment management	697.19K	2.68%	$24.73M
Ranger investment management	796.60K	2.04%	$28.26M
Geosphere capital management	120.00K	1.86%	$4.26M
Manatuck hill partners	160.60K	1.54%	$5.70M
Reinhart partners	1.65M	1.52%	$66.79M
Goehring & rozencwajg associates	713.59K	1.36%	$25.31M

Top Buyers

Holder	Shares	% Assets	Change
Reinhart partners	1.65M	1.52%	1.65M
Barrow hanley mewhinney & strauss	1.42M	0.17%	1.42M
Price t rowe associates inc /md/	1.30M	0.01%	1.19M
Boston partners	854.94K	0.03%	854.94K
Vanguard fiduciary trust	690.61K	0.01%	690.61K

Top Sellers

Holder	Shares	% Assets	Change
Congress asset management co /ma	-	-	-1.79M
Brown advisory	5.79M	0.34%	-1.64M
Sourcerock group	-	-	-1.29M
Fil	-	-	-796.58K
Point72 asset management	-	-	-699.21K

New Positions

Holder	Shares	% Assets	Change	Value
Reinhart partners	1.65M	1.52%	1.65M	$66.79M
Barrow hanley mewhinney & strauss	1.42M	0.17%	1.42M	$50.40M
Boston partners	854.94K	0.03%	854.94K	$30.34M
Vanguard fiduciary trust	690.61K	0.01%	690.61K	$24.50M
Massachusetts financial services co /ma/	681.60K	0.01%	681.60K	$24.18M

Sold Out

Holder	Change
True wealth design	-2.00
Global financial private client	-9.00
Newsquare capital	-9.00
Vermillion wealth management	-11.00
Allspring global investments	-13.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2026	203	-36.16%	30,238,822	-69.84%	29	0.30%	112	-30.86%	58	-46.30%
Dec 31, 2025	243	-20.33%	86,093,226	-9.92%	86	0.95%	118	-22.88%	83	-19.42%
Sep 30, 2025	291	0.34%	95,452,859	-0.45%	94	1.04%	147	-8.70%	99	-
Jun 30, 2025	288	-0.69%	95,645,355	-0.39%	95	1.05%	160	7.38%	98	-9.26%
Mar 31, 2025	287	-1.37%	95,995,193	-4.49%	95	0.96%	148	-8.07%	108	17.39%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Small-Cap ETF	6.01M	6.03%	912.00
Avantis US Small Cap Value ETF	3.32M	3.33%	1.40K
Vanguard Total Stock Mkt Idx Inv	3.16M	3.17%	-17.88K
Vanguard US Total Market Shares ETF	3.18M	3.15%	3.78K
iShares Russell 2000 ETF	2.60M	2.61%	15.44K
Neuberger Berman Genesis Inv	2.34M	2.33%	-173.55K
Vanguard Small Cap Index	2.29M	2.29%	461.00
Neuberger Genesis Inv	1.94M	1.94%	-32.44K
VanEck Oil Services ETF	1.58M	1.59%	-
Harbor Small Cap Value Instl	1.38M	1.38%	-55.59K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Jun 30, 2026	GOODWIN DEANNA L	-	Sell	$284.83K
May 18, 2026	LARSON RODERICK A.	President and CEO	Sell	$191.35K
May 13, 2026	MCDONALD MARTIN J	SVP, Subsea Robotics	Sell	$1.69M
May 12, 2026	MCDONALD MARTIN J	SVP, Subsea Robotics	Sell	$998.61K
Mar 11, 2026	MCEVOY M KEVIN	-	Sell	$905.66K

Insider Transactions Trends

Date	Buy	Sell
2026 Q2	-	4
2026 Q1	-	16
2025 Q3	-	2
2025 Q2	-	1
2025 Q1	-	-

OII Ownership FAQ

Who Owns Oceaneering?

Oceaneering shareholders are primarily institutional investors at 29.86%, followed by 1.36% insiders and 68.78% retail investors. The average institutional ownership in Oceaneering's industry, Oil & Gas Equipment & Services Stocks, is 43.51%, which Oceaneering falls below.

Who owns the most shares of Oceaneering?

Oceaneering’s largest shareholders are Blackrock funding, inc. /de (16.35M shares, 16.23%), Blackrock (15.81M shares, 15.65%), and Vanguard group (12.37M shares, 12.37%). Together, they hold 44.24% of Oceaneering’s total shares outstanding.

Does Blackrock own Oceaneering?

Yes, BlackRock owns 15.65% of Oceaneering, totaling 15.81M shares as of Jun 2024. This represents 0.01% of BlackRock's total assets, with a market value of 374.1M$. In the last quarter, BlackRock decreased its holdings by -91.254K shares, a -0.57% change.

Who is Oceaneering’s biggest shareholder by percentage of total assets invested?

Morgan stanley institutional investment advisors is Oceaneering’s biggest shareholder by percentage of total assets invested, with 11.81% of its assets in 3.45M Oceaneering shares, valued at 122.48M$.

Who is the top mutual fund holder of Oceaneering shares?

iShares Core S&P Small-Cap ETF is the top mutual fund holder of Oceaneering shares, with 6.03% of its total shares outstanding invested in 6.01M Oceaneering shares.

Try Tickergate Pro Free

Customize Everything. 100% Flexibility. Fast and Easy to Use (No code or Excel Needed)

Customize your own personal stocks lists, views and charts
Choose from hundreds of fields, up to 15 years of history
Conduct deep comparison analysis

Discover trending investment themes
Find your next best investment
Research stocks using tools