Oceaneering Ownership | Who Owns Oceaneering?

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Oceaneering Ownership Summary

Oceaneering is owned by 86.07% institutional investors, 1.95% insiders, and 11.98% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 16.00% of OII shares. iShares Core S&P Small-Cap ETF is the top mutual fund, with 6.08% of its assets in Oceaneering shares.

OII Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Oceaneering	86.07%	1.95%	11.98%
Sector	Energy Stocks	147.73%	15.16%	-62.89%
Industry	Oil & Gas Equipment & Services Stocks	41.12%	12.83%	46.05%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock funding, inc. /de	16.00M	16.00%	$384.56M
Blackrock	15.81M	15.65%	$374.10M
Vanguard group	12.37M	12.37%	$297.28M
Brown advisory	7.70M	7.66%	$190.86M
State street	4.43M	4.41%	$109.82M
Earnest partners	3.79M	3.79%	$91.11M
American century companies	3.64M	3.62%	$90.27M
Neuberger berman group	3.54M	3.52%	$87.71M
Dimensional fund advisors lp	3.48M	3.48%	$83.56M
Greenhouse funds lllp	2.49M	2.48%	$61.75M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Keating investment counselors	354.36K	2.36%	$8.52M
Greenhouse funds lllp	2.49M	2.26%	$61.75M
West tower group	27.00K	1.46%	$648.81K
Sagefield capital lp	509.62K	1.41%	$12.63M
Goehring & rozencwajg associates	466.06K	1.39%	$11.55M
Old west investment management	238.10K	1.35%	$5.90M
Ranger investment management	802.63K	1.32%	$19.29M
Aristotle capital boston	843.79K	1.08%	$20.91M
Sheets smith investment management	47.46K	1.05%	$1.24M
Sir capital management	272.40K	0.61%	$6.75M

Top Buyers

Holder	Shares	% Assets	Change
Balyasny asset management	1.36M	0.04%	1.23M
Brown advisory	7.70M	0.25%	356.63K
Blackrock funding, inc. /de	16.00M	0.01%	334.42K
Tudor investment corp et al	491.93K	0.02%	333.67K
Algert global	649.75K	0.27%	276.82K

Top Sellers

Holder	Shares	% Assets	Change
Congress asset management co /ma	-	-	-1.79M
Sourcerock group	-	-	-1.29M
Hennessy advisors	-	-	-1.28M
Fil	-	-	-796.58K
Agf management	-	-	-495.76K

New Positions

Holder	Shares	% Assets	Change	Value
Sir capital management	272.40K	0.61%	272.40K	$6.75M
Norges bank	238.40K	0.00%	238.40K	$6.22M
Granite investment partners	238.38K	0.34%	238.38K	$5.73M
Brandywine global investment management	228.42K	0.04%	228.42K	$5.49M
Summittx capital	226.80K	0.23%	226.80K	$5.62M

Sold Out

Holder	Change
True wealth design	-2.00
Jpl wealth management	-5.00
Harbour investments	-6.00
Global financial private client	-9.00
Newsquare capital	-9.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
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%
Dec 31, 2024	286	9.58%	100,472,902	-0.17%	99	1.00%	159	29.27%	89	-9.18%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Small-Cap ETF	6.04M	6.08%	-724.28K
Vanguard Total Stock Mkt Idx Inv	3.16M	3.18%	10.08K
Vanguard US Total Market Shares ETF	3.18M	3.15%	3.78K
Avantis US Small Cap Value ETF	3.12M	3.14%	2.73K
iShares Russell 2000 ETF	2.39M	2.40%	204.71K
Neuberger Berman Genesis Inv	2.34M	2.33%	-173.55K
Vanguard Small Cap Index	2.26M	2.27%	-1.61K
Neuberger Genesis Inv	2.08M	2.10%	-192.19K
VanEck Oil Services ETF	2.06M	2.07%	31.93K
Harbor Small Cap Value Instl	1.45M	1.45%	-75.87K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Feb 25, 2026	Simons Jennifer Fremont	SVP, CLO and Secretary	Sell	$400.66K
Feb 25, 2026	Laura Benjamin	SVP & Chief Operating Officer	Sell	$1.24M
Feb 26, 2026	Laura Benjamin	SVP & Chief Operating Officer	Sell	$188.31K
Feb 25, 2026	Childress Earl	SVP, Chief Commercial Ofc.	Sell	$842.40K
Feb 25, 2026	Kriendler Holly	SVP, Chief H.R. Officer	Sell	$717.13K

Insider Transactions Trends

Date	Buy	Sell
2026 Q1	-	15
2025 Q3	-	2
2025 Q2	-	1
2025 Q1	-	-
2024 Q4	-	1

OII Ownership FAQ

Who Owns Oceaneering?

Oceaneering shareholders are primarily institutional investors at 86.07%, followed by 1.95% insiders and 11.98% retail investors. The average institutional ownership in Oceaneering's industry, Oil & Gas Equipment & Services Stocks, is 41.12%, which Oceaneering exceeds.

Who owns the most shares of Oceaneering?

Oceaneering’s largest shareholders are Blackrock funding, inc. /de (16M shares, 16.00%), Blackrock (15.81M shares, 15.65%), and Vanguard group (12.37M shares, 12.37%). Together, they hold 44.02% 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 2.36% of its assets in 354.36K Oceaneering shares, valued at 8.52M$.

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 6.08% of its total shares outstanding invested in 6.04M Oceaneering shares.

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