Oceaneering Ownership | Who Owns Oceaneering?

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Oceaneering Ownership Summary

Oceaneering is owned by 95.11% institutional investors, 8.09% insiders. Blackrock funding, inc. /de is the largest institutional shareholder, holding 15.67% of OII shares. iShares Core S&P Small-Cap ETF is the top mutual fund, with 6.01% of its assets in Oceaneering shares.

OII Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Oceaneering	95.11%	8.09%	-3.21%
Sector	Energy Stocks	108.48%	14.45%	-22.93%
Industry	Oil & Gas Equipment & Services Stocks	67.79%	12.15%	20.06%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock funding, inc. /de	15.76M	15.67%	$326.49M
Blackrock	15.81M	15.65%	$374.10M
Vanguard group	12.48M	12.35%	$325.49M
Brown advisory	7.35M	7.30%	$152.20M
Earnest partners	5.44M	5.38%	$141.81M
State street	5.11M	5.06%	$120.99M
Neuberger berman group	4.81M	4.76%	$125.36M
American century companies	3.37M	3.35%	$69.83M
Dimensional fund advisors lp	2.67M	2.64%	$69.50M
Greenhouse funds lllp	2.49M	2.48%	$51.63M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Keating investment counselors	385.02K	2.41%	$7.98M
Goehring & rozencwajg associates	460.19K	2.33%	$11.33M
Greenhouse funds lllp	2.49M	2.13%	$51.63M
Ranger investment management	906.47K	1.49%	$23.64M
Old west investment management	196.64K	1.34%	$4.07M
West tower group	27.00K	1.21%	$559.44K
Glenorchy capital	76.85K	1.17%	$2.00M
Sagefield capital lp	404.85K	1.17%	$8.39M
Sheets smith investment management	47.46K	1.05%	$1.24M
Aristotle capital boston	870.57K	0.92%	$18.04M

Top Buyers

Holder	Shares	% Assets	Change
Balyasny asset management	1.36M	0.04%	1.23M
Brown advisory	7.35M	0.20%	799.72K
Goldman sachs group	936.58K	0.00%	434.27K
Ubs group	534.55K	0.00%	388.77K
Cubist systematic strategies	325.54K	0.05%	325.54K

Top Sellers

Holder	Shares	% Assets	Change
Congress asset management co /ma	-	-	-1.79M
Fmr	1.45M	0.00%	-1.44M
Sourcerock group	-	-	-1.29M
Hennessy advisors	-	-	-1.28M
Blackrock funding, inc. /de	15.76M	0.01%	-879.13K

New Positions

Holder	Shares	% Assets	Change	Value
Cubist systematic strategies	325.54K	0.05%	325.54K	$8.49M
Norges bank	238.40K	0.00%	238.40K	$6.22M
Point72 asset management	175.00K	0.01%	175.00K	$3.63M
Hrt financial lp	100.46K	0.01%	100.46K	$2.08M
Drw securities	48.11K	0.02%	48.11K	$996.84K

Sold Out

Holder	Change
Harbour investments	-6.00
Global financial private client	-9.00
Allspring global investments	-13.00
Nelson, van denburg & campbell wealth management group	-20.00
Barrow hanley mewhinney & strauss	-25.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
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%
Dec 31, 2024	286	9.58%	100,472,902	-0.17%	99	1.00%	159	29.27%	89	-9.18%
Sep 30, 2024	260	8.79%	100,639,707	0.57%	99	1.01%	122	1.67%	98	24.05%
Jun 30, 2024	236	-0.42%	100,056,414	5.10%	99	1.12%	117	5.41%	79	-13.19%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Small-Cap ETF	6.02M	6.01%	908.00
Vanguard Total Stock Mkt Idx Inv	3.19M	3.18%	-101.70K
Vanguard US Total Market Shares ETF	3.18M	3.15%	3.78K
Avantis US Small Cap Value ETF	2.86M	2.85%	2.32K
Vanguard Small Cap Index	2.44M	2.44%	-15.56K
Neuberger Berman Genesis Inv	2.34M	2.33%	-173.55K
iShares Russell 2000 ETF	2.25M	2.25%	-42.84K
Harbor Small Cap Value Instl	1.67M	1.66%	-85.06K
Vanguard Small Cap Growth Index Inv	1.37M	1.37%	-6.95K
Hennessy Cornerstone Mid Cap 30 Inv	1.28M	1.26%	158.80K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Sep 02, 2025	MURPHY PAUL B JR	-	Sell	$242.50K
Aug 27, 2025	Curtis Alan R	SVP and CFO	Sell	$361.47K
May 22, 2025	Beachy Karen H	-	Sell	$100.38K
Nov 07, 2024	GRANATO LEONARDO P	SVP, IMDS	Sell	$56.24K
Sep 10, 2024	Beachy Karen H	-	Sell	$75.70K

Insider Transactions Trends

Date	Buy	Sell
2025 Q3	-	2
2025 Q2	-	1
2025 Q1	-	-
2024 Q4	-	1
2024 Q3	-	4

OII Ownership FAQ

Who Owns Oceaneering?

Oceaneering shareholders are primarily institutional investors at 95.11%, followed by 8.09% insiders and -3.20% retail investors. The average institutional ownership in Oceaneering's industry, Oil & Gas Equipment & Services Stocks, is 67.79%, which Oceaneering exceeds.

Who owns the most shares of Oceaneering?

Oceaneering’s largest shareholders are Blackrock funding, inc. /de (15.76M shares, 15.67%), Blackrock (15.81M shares, 15.65%), and Vanguard group (12.48M shares, 12.35%). Together, they hold 43.67% 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?

Keating investment counselors is Oceaneering’s biggest shareholder by percentage of total assets invested, with 2.41% of its assets in 385.02K Oceaneering shares, valued at 7.98M$.

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 6.01% of its total shares outstanding invested in 6.02M Oceaneering shares.

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