13F Insight
DOSSIER · 13F Holders · Q1 2026Inflation hedgeYield
OII

OCEANEERING INTL INC

379 institutions still hold OCEANEERING INTL INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 675232102·379 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 0.4%
vs prior quarter
13F value held
$2.5B
49.0% inst. owned
of float
Holders
379
+72 QoQ
filers reporting
Activity
+82 / −20
+785 added · −828 reduced
this quarter
Concentration
23.30%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

379 institutions reported OII in Q1 2026. BlackRock, Inc. leads at 23.3% of the visible book. +72 net new institutions vs prior quarter — accumulation reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$580M16.3M0.01%Q1 202602
Vanguard Portfolio Management
CIK 0002100121
$269M7.6M0.01%Q1 202603
STATE STREET CORP
CIK 0000093751
$179M5.0M0.01%Q1 202604
BROWN ADVISORY INC
CIK 0001345929
$178M7.4M0.25%Q4 202505
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$159M4.5M0.00%Q1 202606
AMERICAN CENTURY COMPANIES INC
CIK 0000748054
$134M3.8M0.07%Q1 202607
EARNEST PARTNERS LLC
CIK 0001102578
$131M3.7M0.54%Q1 202608
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$123M3.5M0.03%Q1 202609
Morgan Stanley Institutional Investment Advisors LLC
CIK 0002026079
$122M3.5M11.81%Q1 202610
Neuberger Berman Group LLC
CIK 0001465109
$114M3.2M0.09%Q1 202611
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$84M2.4M0.01%Q1 202612
Greenhouse Funds LLLP
CIK 0001626220
$72M2.0M3.23%Q1 202613
LOOMIS SAYLES & CO L P
CIK 0000312348
$60M1.7M0.08%Q1 202614
BARROW HANLEY MEWHINNEY & STRAUSS LLC
CIK 0000313028
$50M1.4M0.17%Q1 202615
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
CIK 0000884546· Index
$49M1.4M0.01%Q1 202616
NORTHERN TRUST CORP
CIK 0000073124· Index
$45M1.3M0.01%Q1 202617
ROYAL BANK OF CANADA
CIK 0001000275
$37M1.0M0.01%Q1 202618
MORGAN STANLEY
CIK 0000895421
$37M1.0M0.00%Q1 202619
GOLDMAN SACHS GROUP INC
CIK 0000886982
$35M1000K0.00%Q1 202620
Boston Partners
CIK 0001386060
$30M855K0.03%Q1 2026
Page 1 of 19
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