OCEANEERING INTERNATIONAL INC (OII) — Institutional Holders, Q2 2026

379 institutional investment managers reported a OII position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $4.2B. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.

← OII stock profile

OII in Q2 2026: what funds did

Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.

New positions

Added to

144

Trimmed

112

Sold out

Biggest buyers

FRANKLIN RESOURCESAdded · +2,232,589 sh+$90.5M
REINHART PARTNERSNew · +1,648,423 sh+$66.8M
NOMURA ASSET MANAGEMENT INTERNATIONALNew · +1,330,080 sh+$53.9M
BARROW HANLEY MEWHINNEY & STRAUSSAdded · +851,995 sh+$34.5M
GEODE CAPITAL MANAGEMENTAdded · +463,093 sh+$18.8M

Biggest sellers

Boston PartnersSold out · -854,941 sh-$34.6M
BROWN ADVISORYTrimmed · -821,294 sh-$33.3M
Qube Research & Technologies LtdSold out · -588,323 sh-$23.8M
FORT WASHINGTON INVESTMENT ADVISORSSold out · -526,034 sh-$21.3M
ALGERT GLOBALTrimmed · -399,092 sh-$16.2M

OII 13F holders ranked 1–100 of 379

Institutional investors reporting a position in OCEANEERING INTERNATIONAL INC on SEC Form 13F-HR for Q2 2026, ranked by reported value.
#	Institution	Shares	Value	% of portfolio	QoQShares vs Q1 2026
1	BlackRock#1 · 16,403,230 sh	16,403,230	$664.7M	<0.01%	+0.3%
2	VANGUARD PORTFOLIO MANAGEMENT#2 · 7,926,938 sh	7,926,938	$321.2M	0.01%	+4.6%
3	STATE STREET#3 · 4,994,403 sh	4,994,403	$202.4M	<0.01%	-0.8%
4	BROWN ADVISORY#4 · 4,967,307 sh	4,967,307	$201.3M	0.31%	-14.2%
5	VANGUARD CAPITAL MANAGEMENT#5 · 4,485,268 sh	4,485,268	$181.7M	<0.01%	+0.1%
6	AMERICAN CENTURY COMPANIES#6 · 4,023,994 sh	4,023,994	$163.1M	0.07%	+6.8%
7	EARNEST PARTNERS#7 · 3,547,295 sh	3,547,295	$143.7M	0.52%	-3.7%
8	DIMENSIONAL FUND ADVISORS#8 · 3,546,908 sh	3,546,908	$143.7M	0.03%	+2.5%
9	Neuberger Berman Group#9 · 3,228,635 sh	3,228,635	$130.8M	0.09%	+0.3%
10	Morgan Stanley Institutional Investment Advisors#10 · 3,066,015 sh	3,066,015	$124.2M	11.60%	-11.2%
11	FRANKLIN RESOURCES#11 · 3,060,961 sh	3,060,961	$124.0M	0.03%	+269.5%
12	GEODE CAPITAL MANAGEMENT#12 · 2,839,554 sh	2,839,554	$115.1M	<0.01%	+19.5%
13	BARROW HANLEY MEWHINNEY & STRAUSS#13 · 2,272,949 sh	2,272,949	$92.1M	0.28%	+60.0%
14	Greenhouse Funds LLLP#14 · 1,896,343 sh	1,896,343	$76.8M	3.93%	-6.7%
15	VAN ECK ASSOCIATES#15 · 1,849,926 sh	1,849,926	$75.0M	0.05%	-10.3%
16	REINHART PARTNERS#16 · 1,648,423 sh	1,648,423	$66.8M	—	New
17	LOOMIS SAYLES & L P#17 · 1,606,095 sh	1,606,095	$65.1M	0.08%	-5.5%
18	NORTHERN#18 · 1,371,471 sh	1,371,471	$55.6M	<0.01%	+8.2%
19	CHARLES SCHWAB INVESTMENT MANAGEMENT#19 · 1,339,591 sh	1,339,591	$54.3M	<0.01%	-3.1%
20	NOMURA ASSET MANAGEMENT INTERNATIONAL#20 · 1,330,080 sh	1,330,080	$53.9M	0.08%	New
21	PRICE T ROWE ASSOCIATES#21 · 1,320,910 sh	1,320,910	$53.5M	<0.01%	+2.0%
22	MORGAN STANLEY#22 · 1,207,487 sh	1,207,487	$48.9M	<0.01%	+16.1%
23	Bank of New York Mellon#23 · 1,126,793 sh	1,126,793	$45.7M	<0.01%	+49.2%
24	GOLDMAN SACHS GROUP#24 · 1,076,557 sh	1,076,557	$43.6M	<0.01%	+7.7%
25	ROYAL BANK OF CANADA#25 · 932,192 sh	932,192	$37.8M	<0.01%	-11.1%
26	Ranger Investment Management, L.P.#26 · 777,643 sh	777,643	$31.5M	1.99%	-2.4%
27	Goehring & Rozencwajg Associates#27 · 775,476 sh	775,476	$31.4M	1.81%	+8.7%
28	MASSACHUSETTS FINANCIAL SERVICES#28 · 757,311 sh	757,311	$30.7M	<0.01%	+11.1%
29	VANGUARD FIDUCIARY#29 · 711,899 sh	711,899	$28.8M	<0.01%	+3.1%
30	Old West Investment Management#30 · 693,549 sh	693,549	$28.1M	2.98%	-0.5%
31	FEDERATED HERMES#31 · 666,525 sh	666,525	$27.0M	0.04%	-3.2%
32	Invesco Ltd.#32 · 638,880 sh	638,880	$25.9M	<0.01%	-8.9%
33	Fisher Asset Management#33 · 635,141 sh	635,141	$25.7M	<0.01%	-19.8%
34	PRINCIPAL FINANCIAL GROUP#34 · 593,561 sh	593,561	$24.1M	0.01%	+1.4%
35	JPMORGAN CHASE#35 · 500,375 sh	500,375	$20.0M	<0.01%	-5.4%
36	PANAGORA ASSET MANAGEMENT#36 · 485,013 sh	485,013	$19.7M	0.06%	+0.5%
37	Boston Walden#37 · 464,819 sh	464,819	$18.8M	0.14%	-10.5%
38	AQR CAPITAL MANAGEMENT#38 · 449,040 sh	449,040	$18.2M	<0.01%	+14.5%
39	FIRST ADVISORS#39 · 421,475 sh	421,475	$17.1M	0.01%	-3.1%
40	SCHRODER INVESTMENT MANAGEMENT GROUP#40 · 399,661 sh	399,661	$15.8M	0.01%	-33.9%
41	STOREBRAND ASSET MANAGEMENT AS#41 · 366,188 sh	366,188	$14.8M	0.04%	0.0%
42	BANK OF AMERICA#42 · 364,827 sh	364,827	$14.8M	<0.01%	+39.7%
43	FMR#43 · 349,342 sh	349,342	$14.2M	<0.01%	+1.1%
44	PUBLIC SECTOR PENSION INVESTMENT BOARD#44 · 342,697 sh	342,697	$13.9M	0.04%	-4.0%
45	KEATING INVESTMENT COUNSELORS#45 · 333,778 sh	333,778	$13.5M	—	-1.4%
46	BESSEMER GROUP#46 · 331,212 sh	331,212	$13.4M	0.02%	New
47	Granite Investment Partners#47 · 328,414 sh	328,414	$13.3M	0.68%	+0.4%
48	SEI INVESTMENTS#48 · 314,092 sh	314,092	$12.7M	0.01%	-28.7%
49	ENVESTNET ASSET MANAGEMENT#49 · 310,197 sh	310,197	$12.6M	<0.01%	+10.9%
50	Nuveen#50 · 307,461 sh	307,461	$12.5M	<0.01%	-29.3%
51	GAMCO INVESTORS, ET AL#51 · 303,898 sh	303,898	$12.3M	0.11%	-10.2%
52	Sagefield Capital#52 · 284,724 sh	284,724	$11.5M	0.86%	+16.6%
53	HENNESSY ADVISORS#53 · 267,086 sh	267,086	$10.8M	0.35%	New
54	Russell Investments Group, Ltd.#54 · 258,066 sh	258,066	$10.5M	<0.01%	+5.1%
55	UBS Group AG#55 · 254,309 sh	254,309	$10.3M	<0.01%	-19.5%
56	RHUMBLINE ADVISERS#56 · 246,569 sh	246,569	$10.0M	<0.01%	+5.4%
57	Aristotle Capital Boston#57 · 245,180 sh	245,180	$9.9M	0.67%	-9.7%
58	Legal & General Group Plc#58 · 242,503 sh	242,503	$9.8M	<0.01%	+3.7%
59	WELLS FARGO & COMPANY#59 · 236,766 sh	236,766	$9.6M	<0.01%	+29.6%
60	RMB Capital Management#60 · 208,552 sh	208,552	$8.5M	0.13%	+25.4%
61	AMERIPRISE FINANCIAL#61 · 208,057 sh	208,057	$8.4M	<0.01%	+3.5%
62	Archon Capital Management#62 · 208,000 sh	208,000	$8.4M	3.42%	0.0%
63	Swiss National Bank#63 · 199,448 sh	199,448	$8.1M	<0.01%	+1.0%
64	PRUDENTIAL FINANCIAL#64 · 196,196 sh	196,196	$7.9M	<0.01%	-11.2%
65	GABELLI FUNDS#65 · 194,079 sh	194,079	$7.9M	0.05%	+6.6%
66	ALLIANCEBERNSTEIN L.P.#66 · 202,234 sh	202,234	$7.2M	<0.01%	+39.0%
67	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME#67 · 162,283 sh	162,283	$6.6M	<0.01%	-45.8%
68	Manatuck Hill Partners#68 · 160,600 sh	160,600	$6.5M	2.16%	0.0%
69	NEW YORK STATE TEACHERS RETIREMENT SYSTEM#69 · 159,523 sh	159,523	$6.5M	—	+0.5%
70	Jupiter Topco#70 · 156,318 sh	156,318	$6.3M	<0.01%	—
71	MILLENNIUM MANAGEMENT#71 · 154,688 sh	154,688	$6.3M	<0.01%	New
72	ESSEX INVESTMENT MANAGEMENT#72 · 151,463 sh	151,463	$6.1M	—	-4.4%
73	LEUTHOLD GROUP#73 · 142,936 sh	142,936	$5.8M	0.58%	-4.8%
74	Empowered Funds#74 · 134,103 sh	134,103	$5.4M	0.03%	+1.1%
75	Concurrent Investment Advisors#75 · 131,457 sh	131,457	$5.3M	—	+12.8%
76	Spears Abacus Advisors#76 · 121,769 sh	121,769	$4.9M	0.09%	-26.0%
77	Vident Advisory#77 · 106,691 sh	106,691	$4.3M	0.03%	+50.4%
78	MARSHALL WACE, LLP#78 · 104,778 sh	104,778	$4.2M	<0.01%	New
79	DEUTSCHE BANK AG\#79 · 104,689 sh	104,689	$4.2M	<0.01%	+18.8%
80	STATE OF WISCONSIN INVESTMENT BOARD#80 · 102,088 sh	102,088	$4.1M	<0.01%	-9.1%
81	ISTHMUS PARTNERS#81 · 95,786 sh	95,786	$3.9M	—	-0.6%
82	NEW YORK STATE COMMON RETIREMENT FUND#82 · 95,768 sh	95,768	$3.9M	<0.01%	+4.6%
83	EFG International AG#83 · 91,994 sh	91,994	$3.7M	0.07%	-22.1%
84	ROYCE & ASSOCIATES#84 · 90,020 sh	90,020	$3.6M	0.03%	+8.4%
85	VANGUARD ASSET MANAGEMENT, Ltd#85 · 79,314 sh	79,314	$3.2M	<0.01%	+5.8%
86	Gotham Asset Management#86 · 78,820 sh	78,820	$3.2M	<0.01%	+19.6%
87	GREAT WEST LIFE ASSURANCE#87 · 78,603 sh	78,603	$3.2M	<0.01%	-3.2%
88	INTECH INVESTMENT MANAGEMENT#88 · 76,280 sh	76,280	$3.1M	0.03%	-21.6%
89	Creative Planning#89 · 74,796 sh	74,796	$3.0M	<0.01%	+50.6%
90	Glenorchy Capital Ltd#90 · 74,354 sh	74,354	$3.0M	0.11%	+0.1%
91	Legato Capital Management#91 · 72,601 sh	72,601	$2.9M	0.24%	+4.7%
92	CITIGROUP#92 · 72,139 sh	72,139	$2.9M	<0.01%	+264.1%
93	HARBOR CAPITAL ADVISORS#93 · 71,652 sh	71,652	$2.9M	—	+141.4%
94	Mitsubishi UFJ Asset Management , Ltd.#94 · 71,302 sh	71,302	$2.9M	<0.01%	-29.5%
95	OPPENHEIMER ASSET MANAGEMENT#95 · 70,143 sh	70,143	$2.8M	0.03%	+18.7%
96	GeoSphere Capital Management#96 · 69,689 sh	69,689	$2.8M	0.92%	-41.9%
97	THRIVENT FINANCIAL FOR LUTHERANS#97 · 67,579 sh	67,579	$2.7M	<0.01%	-1.6%
98	Annex Advisory Services#98 · 67,302 sh	67,302	$2.7M	—	+29.3%
99	Edgestream Partners, L.P.#99 · 65,581 sh	65,581	$2.7M	0.08%	-43.7%
100	Pathstone#100 · 65,026 sh	65,026	$2.6M	<0.01%	-4.8%

Funds that sold out of OII in Q2 2026 (52)

Held OII at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.

Institutions that held OII in Q1 2026 and reported no position in Q2 2026.
Institution	Shares sold	Value in Q1 2026
Boston Partners854,941 sh	854,941	$30.3M
Qube Research & Technologies Ltd588,323 sh	588,323	$20.9M
FORT WASHINGTON INVESTMENT ADVISORS526,034 sh	526,034	$18.7M
AGF MANAGEMENT LTD365,938 sh	365,938	$13.0M
Informed Momentum127,269 sh	127,269	$4.5M
CITADEL ADVISORS78,377 sh	78,377	$2.8M
Y-Intercept (Hong Kong) Ltd62,516 sh	62,516	$2.2M
Connor, Clark & Lunn Investment Management Ltd.48,333 sh	48,333	$1.7M
LORD, ABBETT45,000 sh	45,000	$1.6M
Melqart Asset Management (UK) Ltd42,922 sh	42,922	$1.5M
JANE STREET GROUP41,029 sh	41,029	$1.5M
Carlson Capital, L.P.32,800 sh	32,800	$1.2M
Man Group plc24,178 sh	24,178	$857.6K
Engineers Gate Manager24,050 sh	24,050	$853.1K
TOWARZYSTWO FUNDUSZY INWESTYCYJNYCH PZU SA21,000 sh	21,000	$744.9K
Oldfield Partners LLP28,729 sh	28,729	$690.4K
XTX Topco Ltd18,018 sh	18,018	$639.1K
Andina Capital Management14,766 sh	14,766	$523.8K
BALYASNY ASSET MANAGEMENT L.P.14,762 sh	14,762	$523.6K
IEQ CAPITAL14,394 sh	14,394	$510.6K
Campbell & Investment Adviser13,862 sh	13,862	$491.7K
Elo Mutual Pension Insurance11,964 sh	11,964	$424.4K
K.J. Harrison & Partners11,600 sh	11,600	$411.5K
Gallacher Capital Management10,231 sh	10,231	$362.9K
HSBC PLC8,669 sh	8,669	$310.9K
MOZAYYX MANAGEMENT8,180 sh	8,180	$290.1K
Abacus Wealth Partners8,091 sh	8,091	$287.0K
TWINBEECH CAPITAL6,600 sh	6,600	$234.1K
Dynamic Technology Lab Private Ltd6,449 sh	6,449	$228.7K
Fieldview Capital Management5,841 sh	5,841	$207.2K
Quadrature Capital Ltd5,797 sh	5,797	$205.6K
CIBC WORLD MARKET5,665 sh	5,665	$200.9K
NKCFO2,500 sh	2,500	$89.0K
Lloyd Advisory Services1,000 sh	1,000	$35.5K
Kingdom Financial Group1,000 sh	1,000	$35.5K
NOMURA ASSET MANAGEMENT LTD900 sh	900	$31.9K
CX Institutional870 sh	870	$31.0K
Byrne Asset Management470 sh	470	$16.7K
Root Financial Partners451 sh	451	$16.0K
Spire Wealth Management203 sh	203	$7.2K
TWIN PEAKS WEALTH ADVISORS188 sh	188	$6.7K
MAI Capital Management183 sh	183	$6.5K
Sound Income Strategies140 sh	140	$4.8K
THOMPSON INVESTMENT MANAGEMENT105 sh	105	$3.7K
Wealth Preservation Advisors50 sh	50	$1.8K
MCF Advisors38 sh	38	$1.3K
Annis Gardner Whiting Capital Advisors36 sh	36	$1.3K
Bruce G. Allen Investments20 sh	20	$709.00
Advisory Services Network11 sh	11	$390.00
Vermillion Wealth Management11 sh	11	$390.00
CURIO WEALTH1 sh	1	$35.00
Elequin Securities120 sh	120	—

Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.