Oceaneering International Inc (OII) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

0Shares Outstanding

425,866Shares held by institutions

$14,675,342Value of institutional holdings

94.90%Institutional ownership %

4.63%Shares Changed QoQ

282No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Oceaneering International Inc (NYSE:OII) has 308 institutional investors that have filed 13F reports for the period ending December 2025.

These investors held 99.1% of outstanding shares in December 2025, up from 96.6% in September 2025.
They increased total shares held in Oceaneering International by 4.14% from the prior quarter, while the number of investors in OII increased 8.45% year over year.
During the quarter, 157 of these 308 funds increased positions in OII, 107 reduced exposure, and 44 held steady.
Combined, these investors held 100.14Mn shares in OII for December 2025, up by 3.98Mn shares quarter on quarter, and down 3.49Mn shares year over year.
BlackRock, Inc. leads ownership in OII with 16.0Mn shares as of December 31, 2025, equal to 15.84% of outstanding shares.
The largest buyers of Oceaneering International for the quarter ending December 2025 were Morgan Stanley Institutional Investment Advisors LLC (3.95Mn), Point72 Asset Management, L.P. (581.71K), Qube Research & Technologies Ltd (466.56K), AGF MANAGEMENT LTD (374.72K), BlackRock, Inc. (334.42K).
Leading sellers of Oceaneering International shares for the quarter ending December 2025 were Jpmorgan Chase & Co (1.02Mn), Bank Of America Corp /De/ (772.59K), FORT WASHINGTON INVESTMENT ADVISORS INC /OH/ (445.15K), TUDOR INVESTMENT CORP ET AL (444.18K), Aristotle Capital Boston, LLC (393.49K).
According to Business Quant data, leading holders of OII for December 2025 are BlackRock, Inc. (16.0Mn), VANGUARD GROUP INC (12.37Mn), BROWN ADVISORY INC (7.43Mn), State Street Corp (4.65Mn), Morgan Stanley Institutional Investment Advisors LLC (3.95Mn), EARNEST PARTNERS LLC (3.79Mn), AMERICAN CENTURY COMPANIES INC (3.61Mn), DIMENSIONAL FUND ADVISORS LP (3.48Mn), Neuberger Berman Group LLC (3.34Mn), Greenhouse Funds LLLP (2.47Mn).

308 Institutional Holders

425,866 Total Shares Held

Rows:

Download Data

Owner Name	Date	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	334,417	2.13%	$0.00
VANGUARD GROUP INC	31 Dec, 2025	187,707	1.54%	$0.00
Morgan Stanley Institutional Investment Advisors LLC	31 Dec, 2025	3,947,022	0.00%	$0.00
Barclays Plc	31 Dec, 2025	-149,781	-26.44%	$0.00
BROWN ADVISORY INC	31 Dec, 2025	-275,282	-3.57%	$0.00
Greenhouse Funds LLLP	31 Dec, 2025	-23,543	-0.94%	$0.00
HSBC HOLDINGS PLC	31 Dec, 2025	17,023	28.95%	$0.00
State Street Corp	31 Dec, 2025	215,366	4.86%	$0.00
Qube Research & Technologies Ltd	31 Dec, 2025	466,556	66.71%	$0.00
Rockefeller Capital Management L.P.	31 Dec, 2025	5,365	694.05%	$0.00
EARNEST PARTNERS LLC	31 Dec, 2025	-225,099	-5.60%	$0.00
Nuveen, LLC	31 Dec, 2025	-19,747	-2.74%	$0.00
AMERICAN CENTURY COMPANIES INC	31 Dec, 2025	-34,783	-0.95%	$0.00
Point72 Asset Management, L.P.	31 Dec, 2025	581,712	495.07%	$0.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	191,117	5.82%	$0.00
Goehring & Rozencwajg Associates, LLC	31 Dec, 2025	102,676	22.03%	$0.00
Neuberger Berman Group LLC	31 Dec, 2025	-204,437	-5.78%	$0.00
UBS Group AG	31 Dec, 2025	-33,425	-6.80%	$0.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	51,871	2.30%	$0.00
Aristotle Capital Boston, LLC	31 Dec, 2025	-393,487	-46.63%	$0.00

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