Oceaneering Ownership | Who Owns Oceaneering?

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Oceaneering Ownership Summary

Oceaneering is owned by 105.96% institutional investors, 1.28% insiders. Blackrock funding, inc. /de is the largest institutional shareholder, holding 16.48% of OII shares. iShares Core S&P Small-Cap ETF is the top mutual fund, with 6.10% of its assets in Oceaneering shares.

OII Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Oceaneering	105.96%	1.28%	-7.24%
Sector	Energy Stocks	62.94%	15.44%	21.62%
Industry	Oil & Gas Equipment & Services Stocks	73.88%	13.79%	12.33%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock funding, inc. /de	16.40M	16.48%	$664.66M
Blackrock	15.81M	15.65%	$374.10M
Vanguard group	12.37M	12.37%	$297.28M
State street	4.99M	5.02%	$202.37M
Brown advisory	4.97M	4.99%	$201.28M
Vanguard capital management	4.49M	4.51%	$181.74M
American century companies	4.02M	4.04%	$163.05M
Earnest partners	3.55M	3.56%	$143.74M
Dimensional fund advisors lp	3.55M	3.56%	$143.71M
Neuberger berman group	3.23M	3.24%	$130.82M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Morgan stanley institutional investment advisors	3.07M	11.60%	$124.23M
Greenhouse funds lllp	1.90M	3.93%	$76.84M
Keating investment counselors	333.78K	3.71%	$13.52M
Archon capital management	208.00K	3.42%	$8.43M
Old west investment management	693.55K	2.98%	$28.10M
Manatuck hill partners	160.60K	2.16%	$6.51M
Ranger investment management	777.64K	1.99%	$31.51M
Goehring & rozencwajg associates	775.48K	1.81%	$31.42M
Reinhart partners	1.65M	1.52%	$66.79M
Corigliano investment advisers	82.60K	1.14%	$2.93M

Top Buyers

Holder	Shares	% Assets	Change
Franklin resources	3.06M	0.03%	2.23M
Reinhart partners	1.65M	1.52%	1.65M
Sixth street partners management company	1.34M	0.01%	1.34M
Macquarie management	1.33M	0.08%	1.33M
Barrow hanley mewhinney & strauss	2.27M	0.28%	852.00K

Top Sellers

Holder	Shares	% Assets	Change
Congress asset management co /ma	-	-	-1.79M
Sourcerock group	-	-	-1.29M
Boston partners	-	-	-854.94K
Brown advisory	4.97M	0.31%	-821.29K
Fil	-	-	-796.58K

New Positions

Holder	Shares	% Assets	Change	Value
Reinhart partners	1.65M	1.52%	1.65M	$66.79M
Sixth street partners management company	1.34M	0.01%	1.34M	$54.28M
Macquarie management	1.33M	0.08%	1.33M	$53.90M
Hennessy advisors	267.09K	0.35%	267.09K	$10.82M
Norges bank	238.40K	0.00%	238.40K	$6.22M

Sold Out

Holder	Change
Curio wealth	-1.00
True wealth design	-2.00
Global financial private client	-9.00
Newsquare capital	-9.00
Advisory services network	-11.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2026	383	1.86%	105,469,690	3.68%	105	1.04%	216	-3.14%	109	1.87%
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%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Small-Cap ETF	6.07M	6.10%	-4.95K
Avantis US Small Cap Value ETF	3.45M	3.46%	3.90K
Vanguard MStar Total Stk Mkt Idx Invest	3.18M	3.19%	12.02K
Vanguard Morn Total Stk Mkt Idx Investor	3.16M	3.18%	-17.88K
Vanguard Total Stock Mkt Idx Inv	3.16M	3.17%	-17.88K
Vanguard US Total Market Shares ETF	3.18M	3.15%	3.78K
Franklin US Small Cap Value Equity	2.89M	2.91%	1.84M
iShares Russell 2000 ETF	2.54M	2.56%	-45.22K
Neuberger Berman Genesis Inv	2.34M	2.33%	-173.55K
Vanguard Small Cap Index	2.29M	2.30%	4.42K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Aug 07, 2026	MURPHY PAUL B JR	-	Sell	$483.69K
Jul 30, 2026	DYER CHRISTOPHER J	SVP, OPGroup	Sell	$57.18K
Jul 30, 2026	MCEVOY M KEVIN	-	Sell	$143.78K
Jul 30, 2026	Childress Earl	SVP, Chief Commercial Ofc.	Sell	$593.31K
Jun 30, 2026	GOODWIN DEANNA L	-	Sell	$284.83K

Insider Transactions Trends

Date	Buy	Sell
2026 Q3	-	3
2026 Q2	-	4
2026 Q1	-	16
2025 Q3	-	2
2025 Q2	-	1

OII Ownership FAQ

Who Owns Oceaneering?

Oceaneering shareholders are primarily institutional investors at 105.96%, followed by 1.28% insiders and -7.24% retail investors. The average institutional ownership in Oceaneering's industry, Oil & Gas Equipment & Services Stocks, is 73.88%, which Oceaneering exceeds.

Who owns the most shares of Oceaneering?

Oceaneering’s largest shareholders are Blackrock funding, inc. /de (16.4M shares, 16.48%), Blackrock (15.81M shares, 15.65%), and Vanguard group (12.37M shares, 12.37%). Together, they hold 44.50% 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 11.60% of its assets in 3.07M Oceaneering shares, valued at 124.23M$.

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 6.10% of its total shares outstanding invested in 6.07M Oceaneering shares.

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