Oceaneering International, Inc. (OII) Institutional Ownership & Insider Trading

376 institutions reported holding Oceaneering International, Inc. shares in 13F filings for the quarter ended 2026-06-30, according to EquiReason's reading of their SEC filings. 27 insider trades on Form 4 since 2025-10-01.

Source: SEC EDGAR filings · figures as of 2026-09-30 · read by EquiReason

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Oil & Gas Equipment & Services · Energy

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Market cap: 3.9B
P/E TTM: 12.0
Dividend yield: —
52-week: —
Next earnings: 16 Feb, in 115 days

Institutions · all 13F filers

quarter to 30 Jun 2026 · filers in both quarters

376 institutions held —% of the shares. Across filers that reported both quarters, shares held changed +2.6%.

Largest moves, shares (millions)

Institutional flow by quarter

net shares added or trimmed, millions · filers in both quarters

Quarter	Holders	Shares held, M	Change	Increased	New	Decreased	Closed
Jun 26	376	104	+2.6%	132	49	99	42
Mar 26	362	102	+1.4%	122	75	92	25
Dec 25	309	100	+4.6%	104	30	87	19
Sep 25	295	96	-0.8%	98	34	93	19
Jun 25	285	96	-0.3%	105	37	89	33
Mar 25	281	96	-4.2%	99	31	99	26
Dec 24	281	101	-1.0%	91	39	72	23
Sep 24	256	101	-0.7%	78	34	89	13

Oceaneering International, Inc. — questions

Who owns Oceaneering International, Inc. stock?: 376 institutions reported Oceaneering International, Inc. shares in 13F filings for the quarter ended 2026-06-30. The largest: BlackRock, Inc. (16.5%), VANGUARD PORTFOLIO MANAGEMENT LLC (8.0%), STATE STREET CORP (5.0%).
Are Oceaneering International, Inc. insiders buying or selling?: 27 insider trades on Form 4 since 2025-10-01; the full list, with dates, people and plan status, is on this page.

Every figure on this page comes from Oceaneering International, Inc.'s own SEC filings — see them on SEC EDGAR. Price data is licensed and shown only inside the product.

How these figures are read: methodology · EquiReason.

Important information. Figures on this page are taken from filings submitted to the U.S. Securities and Exchange Commission (SEC) and processed automatically by EquiReason. They may contain errors, omissions or delays, and EquiReason makes no representation or warranty as to their accuracy, completeness or timeliness. Always verify figures against the original filing on SEC EDGAR before relying on them.

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