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Oceaneering International, Inc. (OII) institutional ownership

Latest close $48.02 Jul 23, 2026
Market cap$3.9B 52-week range SectorEnergy
Funds holding · Q1 2026
346
reported OII position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Net bought $44M
210 buyers · 136 sellers

Oceaneering International, Inc. (OII) price and institutional activity

Dates

Q1 2026

$345M bought by 210 investors
Barrow Hanley Mewhinney & Strauss LLC$46MT. Rowe Price Associates$39M +208 more
$301M sold by 136 investors
Brown Advisory Inc-$53MPoint72 Asset Management, L.P.-$23M +134 more
Bought Sold Totals per quarter; hover a bar for the names.

Oceaneering International, Inc. (OII) institutional activity · 346

Investor Type Est. change Change Δ Own Date
Brown Advisory Inc · Reduced −$53M
Change −1.6M Date Q1 2026
Brown Advisory Inc Reduced· Q1 2026 −$53M −1.6M Q1 2026
Barrow Hanley Mewhinney & Strauss LLC · New +$46M
Change +1.4M Date Q1 2026
Barrow Hanley Mewhinney & Strauss LLC New· Q1 2026 +$46M +1.4M Q1 2026
T. Rowe Price Associates · Added +$39M
Change +1.2M Date Q1 2026
T. Rowe Price Associates Added· Q1 2026 +$39M +1.2M Q1 2026
Boston Partners · New +$28M
Change +855K Date Q1 2026
Boston Partners New· Q1 2026 +$28M +855K Q1 2026
Point72 Asset Management, L.P. · Exited −$23M
Change −699K Δ Own −100.0% Date Q1 2026
Point72 Asset Management, L.P. Exited· Q1 2026 −$23M −699K −100.0% Q1 2026
Massachusetts Financial Services Co · New +$22M
Change +682K Date Q1 2026
Massachusetts Financial Services Co New· Q1 2026 +$22M +682K Q1 2026
Federated Hermes, Inc. · Added +$19M
Change +578K Date Q1 2026
Federated Hermes, Inc. Added· Q1 2026 +$19M +578K Q1 2026
Qube Research & Technologies Ltd · Reduced −$19M
Change −578K Date Q1 2026
Qube Research & Technologies Ltd Reduced· Q1 2026 −$19M −578K Q1 2026
Van Eck Associates Corp · Added +$18M
Change +561K Date Q1 2026
Van Eck Associates Corp Added· Q1 2026 +$18M +561K Q1 2026
Tudor Investment Corp Et Al · Exited −$17M
Change −540K Δ Own −100.0% Date Q1 2026
Tudor Investment Corp Et Al Exited· Q1 2026 −$17M −540K −100.0% Q1 2026
Vanguard · Added +$17M
Change +536K Date Q1 2026
Vanguard Added· Q1 2026 +$17M +536K Q1 2026
Morgan Stanley Institutional Investment Advisors LLC · Reduced −$16M
Change −494K Date Q1 2026
Morgan Stanley Institutional Investment Advisors LLC Reduced· Q1 2026 −$16M −494K Q1 2026
Greenhouse Funds Lllp · Reduced −$14M
Change −436K Date Q1 2026
Greenhouse Funds Lllp Reduced· Q1 2026 −$14M −436K Q1 2026
State Street · Added +$12M
Change +387K Date Q1 2026
State Street Added· Q1 2026 +$12M +387K Q1 2026
Bank of America Corp · Reduced −$12M
Change −367K Date Q1 2026
Bank of America Corp Reduced· Q1 2026 −$12M −367K Q1 2026
Data through Q1 2026 · filed Jun 9, 2026
15 of 346

Famous investor activity in Oceaneering International, Inc. (OII)

Oceaneering International, Inc. (OII) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Goodwin Deanna L. · Director Sell −$285K
Price $40.69 Qty −7K Owned 36K ΔOwn −16.3% Trade date Jun 30, 2026 Filed date Jul 1, 2026
Goodwin Deanna L. Director Sell $40.69 −7K −$285K 36K −16.3% Jun 30, 2026 Jul 1, 2026
Larson Roderick A. · Director Sell −$191K
Price $38.27 Qty −5K Owned 397K Trade date May 18, 2026 Filed date May 19, 2026
Larson Roderick A. Director Sell $38.27 −5K −$191K 397K May 18, 2026 May 19, 2026
Jenkins Roger W. · Director Grant (A) 5K
Owned 5K Trade date May 15, 2026 Filed date May 19, 2026
Jenkins Roger W. Director Grant (A) 5K 5K May 15, 2026 May 19, 2026
Webster Steven A. · Director Grant (A) 5K
Owned 166K Trade date May 15, 2026 Filed date May 19, 2026
Webster Steven A. Director Grant (A) 5K 166K May 15, 2026 May 19, 2026
Reinhardsen Jon Erik · Director Grant (A) 5K
Owned 101K Trade date May 15, 2026 Filed date May 19, 2026
Reinhardsen Jon Erik Director Grant (A) 5K 101K May 15, 2026 May 19, 2026
Poddar Reema · Director Grant (A) 5K
Owned 23K Trade date May 15, 2026 Filed date May 19, 2026
Poddar Reema Director Grant (A) 5K 23K May 15, 2026 May 19, 2026
Murphy Paul B. Jr · Director Grant (A) 5K
Owned 79K Trade date May 15, 2026 Filed date May 19, 2026
Murphy Paul B. Jr Director Grant (A) 5K 79K May 15, 2026 May 19, 2026
McEvoy M. Kevin · Director Grant (A) 7K
Owned 137K Trade date May 15, 2026 Filed date May 19, 2026
McEvoy M. Kevin Director Grant (A) 7K 137K May 15, 2026 May 19, 2026
Goodwin Deanna L. · Director Grant (A) 5K
Owned 43K Trade date May 15, 2026 Filed date May 19, 2026
Goodwin Deanna L. Director Grant (A) 5K 43K May 15, 2026 May 19, 2026
Beachy Karen H. · Director Grant (A) 5K
Owned 27K Trade date May 15, 2026 Filed date May 19, 2026
Beachy Karen H. Director Grant (A) 5K 27K May 15, 2026 May 19, 2026
Berry William B. · Director Grant (A) 5K
Owned 101K Trade date May 15, 2026 Filed date May 19, 2026
Berry William B. Director Grant (A) 5K 101K May 15, 2026 May 19, 2026
McDonald Martin J. · Officer Sell −$1.7M
Price $38.49 Qty −44K Owned 49K Trade date May 13, 2026 Filed date May 14, 2026
McDonald Martin J. Officer Sell $38.49 −44K −$1.7M 49K May 13, 2026 May 14, 2026
McDonald Martin J. · Officer Sell −$999K
Price $38.33 Qty −26K Owned 93K Trade date May 12, 2026 Filed date May 14, 2026
McDonald Martin J. Officer Sell $38.33 −26K −$999K 93K May 12, 2026 May 14, 2026
McEvoy M. Kevin · Director Sell −$906K
Price $35.27 Qty −26K Owned 130K Trade date Mar 11, 2026 Filed date Mar 13, 2026
McEvoy M. Kevin Director Sell $35.27 −26K −$906K 130K Mar 11, 2026 Mar 13, 2026
Laura Benjamin · Officer Sell −$188K
Price $36.88 Qty −5K Owned 41K Trade date Feb 26, 2026 Filed date Feb 26, 2026
Laura Benjamin Officer Sell $36.88 −5K −$188K 41K Feb 26, 2026 Feb 26, 2026
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Oceaneering International, Inc. (OII) activist and large shareholders

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
BlackRock Inc. 16.0M
% of shares outstanding 15.9% Filing date Jan 22, 2024
BlackRock Inc. 16.0M 15.9% Jan 22, 2024
Vanguard Group Inc 12.5M
% of shares outstanding 12.4% Filing date Feb 13, 2024
Vanguard Group Inc 12.5M 12.4% Feb 13, 2024
Vanguard Portfolio Management 7.7M
% of shares outstanding 7.7% Filing date Apr 29, 2026
Vanguard Portfolio Management 7.7M 7.7% Apr 29, 2026
Vanguard Capital Management 5.2M
% of shares outstanding 5.3% Filing date Apr 30, 2026
Vanguard Capital Management 5.2M 5.3% Apr 30, 2026
State Street Corporation 5.0M
% of shares outstanding 5.1% Filing date May 12, 2026
State Street Corporation 5.0M 5.1% May 12, 2026
Earnest Partners LLC 5.2M
% of shares outstanding 5.1% Filing date Mar 11, 2024
Earnest Partners LLC 5.2M 5.1% Mar 11, 2024
FMR LLC 4.0M
% of shares outstanding 4.0% Filing date Feb 9, 2023
FMR LLC 4.0M 4.0% Feb 9, 2023
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Oceaneering International, Inc. (OII) ownership FAQ

Who owns OII?

346 reporting institutions disclosed OII position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.