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OII · Oceaneering International Inc · Shareholders & Ownership

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$36.76 -7.34 (-16.64%) Earnings today
Market Cap
$4.39B
Shares
99.53M
Volume · Oct 22 2.24M Avg daily vol (3M) 948.65K

Every disclosed holder of OII in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

Who Owns OII

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

No chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.

Holder group Shares % Out
Institutional (13F) 104,285,227 104.78%
Insiders (Forms 3, 4, 5) 1,811,920 1.82%
13D/G-only blocks 0 0.00%
Remaining 6,567,502 -6.60%
Registered funds (N-PORT, not summed) 59,390,840 59.67%

Shares outstanding: 99,529,645, the issuer's latest cover-page count restated onto today's split basis.

Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of OII

# Holder Shares
1
BlackRock, Inc.
13F CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
16,403,230
1.1
iShares Core S&P Small-Cap ETF
Fund S000004313 · Registered fund · Jun 30, 2026
iShares Trust, not summed
6,009,481
1.2
iShares Russell 2000 ETF
Fund S000004344 · Registered fund · Jun 30, 2026
iShares Trust, not summed
2,586,995
1.3
iShares Russell 2000 Growth ETF
Fund S000004343 · Registered fund · Jun 30, 2026
iShares Trust, not summed
850,376
1.4
iShares S&P Small-Cap 600 Growth ETF
Fund S000004314 · Registered fund · Jun 30, 2026
iShares Trust, not summed
529,131
1.5
iShares S&P Small-Cap 600 Value ETF
Fund S000004316 · Registered fund · Jun 30, 2026
iShares Trust, not summed
352,116
2
VANGUARD PORTFOLIO MANAGEMENT LLC
13F CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
7,926,938
3
STATE STREET CORP
13F CIK 93751 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
4,994,403
3.1
State Street(R) SPDR(R) Portfolio S&P 600(TM) Small Cap ETF
Fund S000041317 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
911,995
3.2
State Street(R) SPDR(R) S&P(R) Oil & Gas Equipment & Services ETF
Fund S000012334 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
474,738
3.3
State Street(R) SPDR(R) S & P 600(TM) Small Cap Growth ETF
Fund S000006990 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
329,899
3.4
State Street(R) SPDR(R) S&P Kensho New Economies Composite ETF
Fund S000063362 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
274,599
3.5
State Street(R) SPDR(R) S & P 600(TM) Small Cap Value ETF
Fund S000006974 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
211,330
4
BROWN ADVISORY INC
13F CIK 1345929 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
4,967,307
4.1
BROWN ADVISORY INC
13G CIK 1345929 · Unknown · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
5,077,853
4.2
Brown Advisory Small-Cap Fundamental Value Fund
Fund S000038484 · Registered fund · Jun 30, 2026
Brown Advisory Funds, not summed
795,319
4.3
Brown Advisory Small-Cap Growth Fund
Fund S000038483 · Registered fund · Jun 30, 2026
Brown Advisory Funds, not summed
593,759
4.4
Brown Advisory Mid-Cap Growth Fund
Fund S000058723 · Registered fund · Mar 31, 2026
Brown Advisory Funds, not summed
3,903
5
VANGUARD CAPITAL MANAGEMENT LLC
13F CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
4,485,268
6
AMERICAN CENTURY COMPANIES INC
13F CIK 748054 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
4,023,994
7
EARNEST PARTNERS LLC
13F CIK 1102578 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
3,547,295
8
DIMENSIONAL FUND ADVISORS LP
13F CIK 354204 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
3,546,908
8.1
U.S. SMALL CAP PORTFOLIO
Fund S000000971 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
436,858
8.2
Dimensional U.S. Targeted Value ETF
Fund S000070901 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
398,751
8.3
U.S. MICRO CAP PORTFOLIO
Fund S000000948 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
362,211
8.4
Dimensional U.S. Small Cap ETF
Fund S000070906 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
339,524
8.5
U.S. Targeted Value Portfolio
Fund S000000970 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
324,255
9
NEUBERGER BERMAN GROUP LLC
13F CIK 1465109 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
3,228,635
9.1
Neuberger Genesis Fund
Fund S000007841 · Registered fund · May 31, 2026
NEUBERGER BERMAN EQUITY FUNDS, not summed
1,935,475
10
Avantis U.S. Small Cap Value ETF
Fund S000066459 · Registered fund · May 31, 2026
American Century ETF Trust, not summed
3,198,625
11
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
3,163,469
12
Morgan Stanley Institutional Investment Advisors LLC
13F CIK 2026079 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
3,066,015
13
FRANKLIN RESOURCES INC
13F CIK 38777 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
3,060,961
13.1
Franklin Small Cap Value Fund
Fund S000007356 · Registered fund · Jul 31, 2026
Franklin Value Investors Trust, not summed
1,772,055
13.2
Franklin Dynatech Fund
Fund S000006754 · Registered fund · Jun 30, 2026
Franklin Custodian Funds, not summed
1,000,000
13.3
Franklin Small Cap Value VIP Fund
Fund S000007315 · Registered fund · Jun 30, 2026
Franklin Templeton Variable Insurance Products Trust, not summed
322,732
13.4
Franklin Mutual Small-Mid Cap Value Fund
Fund S000007354 · Registered fund · Jul 31, 2026
Franklin Value Investors Trust, not summed
96,491
13.5
Franklin Natural Resources Fund
Fund S000006887 · Registered fund · Jul 31, 2026
Franklin Strategic Series, not summed
34,700
14
GEODE CAPITAL MANAGEMENT, LLC
13F CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
2,839,554
15
VANGUARD SMALL-CAP INDEX FUND
Fund S000002845 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
2,289,398
16
BARROW HANLEY MEWHINNEY & STRAUSS LLC
13F CIK 313028 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
2,272,949
17
Greenhouse Funds LLLP
13F CIK 1626220 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,896,343
18
VAN ECK ASSOCIATES CORP
13F CIK 869178 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,849,926
18.1
VanEck Oil Services ETF
Fund S000034408 · Registered fund · Jun 30, 2026
VanEck ETF Trust, not summed
1,597,821
18.2
VanEck Robotics ETF
Fund S000079664 · Registered fund · Jun 30, 2026
VanEck ETF Trust, not summed
32,629
19
REINHART PARTNERS, LLC.
13F CIK 1080298 · Registered investment adviser · Sep 30, 2026
1,650,476
19.1
Reinhart Genesis PMV Fund
Fund S000055903 · Registered fund · May 31, 2026
Managed Portfolio Series, not summed
258,903
20
LOOMIS SAYLES & CO L P
13F CIK 312348 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,606,095
20.1
Loomis Sayles Small Cap Growth Fund
Fund S000006705 · Registered fund · Jun 30, 2026
LOOMIS SAYLES FUNDS II, not summed
741,551
20.2
Loomis Sayles Small Cap Value Fund
Fund S000006647 · Registered fund · Jun 30, 2026
LOOMIS SAYLES FUNDS I, not summed
50,882
21
NORTHERN TRUST CORP
13F CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
1,371,471
21.1
Small Cap Index Fund
Fund S000001245 · Registered fund · Jun 30, 2026
Northern Funds, not summed
50,984
21.2
Small Cap Value Fund
Fund S000001246 · Registered fund · Jun 30, 2026
Northern Funds, not summed
33,820
21.3
Small Cap Core Fund
Fund S000001244 · Registered fund · Jun 30, 2026
Northern Funds, not summed
11,091
21.4
FlexShares Morningstar US Market Factor Tilt Index Fund
Fund S000033312 · Registered fund · Jul 31, 2026
FlexShares Trust, not summed
5,214
22
Harbor Small Cap Value Fund
Fund S000000689 · Registered fund · Jul 31, 2026
HARBOR FUNDS, not summed
1,365,529
23
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,339,591
23.1
Schwab U.S. Small-Cap ETF
Fund S000026636 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
480,038
23.2
Schwab Fundamental U.S. Small Company ETF
Fund S000040878 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
273,133
23.3
Schwab Small-Cap Index Fund
Fund S000005912 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
244,770
23.4
Schwab Fundamental U.S. Small Company Index Fund
Fund S000016767 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
70,508
23.5
Schwab Total Stock Market Index Fund
Fund S000005913 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
58,918
24
NOMURA ASSET MANAGEMENT INTERNATIONAL INC.
13F CIK 921739 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,330,080
24.1
Nomura Small Cap Growth Fund
Fund S000006286 · Registered fund · Jun 30, 2026
IVY FUNDS, not summed
390,176
24.2
Nomura VIP Small Cap Growth Series
Fund S000006233 · Registered fund · Jun 30, 2026
Ivy Variable Insurance Portfolios, not summed
76,298
25
PRICE T ROWE ASSOCIATES INC /MD/
13F CIK 80255 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,320,910
25.1
T. Rowe Price New Horizons Fund, Inc.
Fund S000002106 · Registered fund · Jun 30, 2026
T. ROWE PRICE NEW HORIZONS FUND, INC., not summed
770,854
25.2
T. Rowe Price Extended Equity Market Index Fund
Fund S000002090 · Registered fund · Jun 30, 2026
T. ROWE PRICE INDEX TRUST, INC., not summed
15,346
25.3
T. Rowe Price Small-Cap Index Fund
Fund S000051327 · Registered fund · Jun 30, 2026
T. ROWE PRICE INDEX TRUST, INC., not summed
15,200
25.4
T. Rowe Price Total Equity Market Index Fund
Fund S000002091 · Registered fund · Jun 30, 2026
T. ROWE PRICE INDEX TRUST, INC., not summed
6,055
26
VANGUARD SMALL-CAP GROWTH INDEX FUND
Fund S000002846 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
1,318,432
27
MORGAN STANLEY
13F CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
1,207,487
27.1
E*TRADE No Fee Total Market Index Fund
Fund S000090722 · Registered fund · Jul 31, 2026
E Trade Trust, not summed
83
28
VANGUARD EXTENDED MARKET INDEX FUND
Fund S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
1,144,137
29
Bank of New York Mellon Corp
13F CIK 1390777 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
1,126,793
29.1
BNY Mellon US Small Cap Core Equity ETF
Fund S000067262 · Registered fund · Jul 31, 2026
BNY Mellon ETF Trust, not summed
3,672
30
GOLDMAN SACHS GROUP INC
13F CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
1,076,557
30.1
Goldman Sachs Small Cap Value Fund
Fund S000009323 · Registered fund · May 31, 2026
Goldman Sachs Trust, not summed
127,227
30.2
Multi-Manager U.S. Small Cap Equity Fund
Fund S000051363 · Registered fund · Apr 30, 2026
Goldman Sachs Trust II, not summed
30,203
30.3
Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF
Fund S000048296 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust, not summed
22,580
30.4
Goldman Sachs Small Cap Growth Insights Fund
Fund S000014930 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
7,947
30.5
Goldman Sachs Innovate Equity ETF
Fund S000068597 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust, not summed
7,516
31
ROYAL BANK OF CANADA
13F CIK 1000275 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
932,192
32
Ranger Investment Management, L.P.
13F CIK 1319691 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
777,643
32.1
Ranger Small Cap Fund
Fund S000033849 · Registered fund · Jul 31, 2026
SPEND LIFE WISELY FUNDS INVESTMENT TRUST, not summed
7,955
33
Goehring & Rozencwajg Associates, LLC
13F CIK 1863154 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
775,476
33.1
Goehring & Rozencwajg Resources Fund
Fund S000055275 · Registered fund · Aug 31, 2026
GOEHRING & ROZENCWAJG INVESTMENT FUNDS, not summed
317,233
34
MASSACHUSETTS FINANCIAL SERVICES CO /MA/
13F CIK 912938 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
757,311
34.1
MFS New Discovery Fund
Fund S000000765 · Registered fund · May 31, 2026
MFS SERIES TRUST I, not summed
554,753
34.2
MFS New Discovery Series
Fund S000002680 · Registered fund · Jun 30, 2026
MFS VARIABLE INSURANCE TRUST, not summed
200,947
34.3
MFS Global Alternative Strategy Fund
Fund S000019515 · Registered fund · Jul 31, 2026
MFS Series Trust XV, not summed
1,611
35
VANGUARD FIDUCIARY TRUST CO
13F CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
711,899
36
Old West Investment Management, LLC
13F CIK 1549358 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
693,549
37
VANGUARD TAX-MANAGED SMALL-CAP FUND
Fund S000004387 · Registered fund · Jun 30, 2026
VANGUARD TAX-MANAGED FUNDS, not summed
687,919
38
VANGUARD EXPLORER FUND
Fund S000002578 · Registered fund · Jul 31, 2026
VANGUARD EXPLORER FUND, not summed
674,506
39
FEDERATED HERMES, INC.
13F CIK 1056288 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
666,525
40
LARSON RODERICK A.
Insider CIK 1550150 · Oct 1, 2026
Director, issuer-wide
642,710
41
Invesco Ltd.
13F CIK 914208 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
638,880
41.1
Invesco S&P SmallCap Energy ETF
Fund S000028297 · Registered fund · May 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
129,137
41.2
Invesco RAFI US 1500 Small-Mid ETF
Fund S000013120 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
101,547
41.3
Invesco S&P SmallCap 600 Revenue ETF
Fund S000064596 · Registered fund · May 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
87,668
41.4
Invesco S&P SmallCap Quality ETF
Fund S000056849 · Registered fund · May 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
58,751
41.5
Invesco Oil & Gas Services ETF
Fund S000003043 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
45,329
42
Fisher Asset Management, LLC
13F CIK 850529 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
635,141
43
VANGUARD STRATEGIC EQUITY FUND
Fund S000002593 · Registered fund · Jun 30, 2026
VANGUARD HORIZON FUNDS, not summed
622,439
44
VANGUARD ENERGY INDEX FUND
Fund S000004448 · Registered fund · May 31, 2026
VANGUARD WORLD FUND, not summed
611,315
45
PRINCIPAL FINANCIAL GROUP INC
13F CIK 1126328 · Insurance company · Jun 30, 2026
carried, not yet filed for the newest quarter
593,561
45.1
SmallCap Growth Fund I
Fund S000007175 · Registered fund · Jul 31, 2026
Principal Funds, Inc, not summed
546,684
45.2
Principal U.S. Small-Cap ETF
Fund S000055159 · Registered fund · Jun 30, 2026
Principal Exchange-Traded Funds, not summed
105,178
45.3
SmallCap S&P 600 Index Fund
Fund S000007203 · Registered fund · Jul 31, 2026
Principal Funds, Inc, not summed
73,490
45.4
SmallCap Value Fund II
Fund S000007169 · Registered fund · Jul 31, 2026
Principal Funds, Inc, not summed
561
46
American Beacon Small Cap Value Fund
Fund S000001818 · Registered fund · Jul 31, 2026
AMERICAN BEACON FUNDS, not summed
588,869
47
VANGUARD RUSSELL 2000 INDEX FUND
Fund S000030003 · Registered fund · May 31, 2026
VANGUARD SCOTTSDALE FUNDS, not summed
507,884
48
JPMORGAN CHASE & CO
13F CIK 19617 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
500,375
49
PANAGORA ASSET MANAGEMENT INC
13F CIK 883677 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
485,013
50
Boston Trust Walden Corp
13F CIK 1534866 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
464,819

59 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 566 holders

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Key facts CIK 73756 CUSIP 675232102 13F (30d) 59 filings 47 filers Visit website Investor relations