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Who owns Oceaneering International (OII) stock

368 funds reported Oceaneering International (OII) shares in their latest 13F filings, worth $4.4B in all. The largest holder is BlackRock ($665M). Last quarter 191 funds added to their stakes and 149 cut them.

Largest holders of OII (13F)Largest holders of OII (13F)BlackRock$665MVanguard Portfolio Management LLC$321MVanguard Group$297MState Street$202MBrown Advisory$201MVanguard Capital Management LLC$182MAmerican Century Companies$163MEarnest Partners LLC$144MDimensional Fund Advisors LP$144MNeuberger Berman Group LLC$131M

Largest holders (13F)

FundSharesValueChangeQuarter
BlackRock16,403,230$665Mincrease2026-06-30
Vanguard Portfolio Management LLC7,926,938$321Mincrease2026-06-30
Vanguard Group12,371,147$297Mincrease2025-12-31
State Street4,994,403$202Mdecrease2026-06-30
Brown Advisory4,967,307$201Mdecrease2026-06-30
Vanguard Capital Management LLC4,485,268$182Mincrease2026-06-30
American Century Companies4,023,994$163Mincrease2026-06-30
Earnest Partners LLC3,547,295$144Mdecrease2026-06-30
Dimensional Fund Advisors LP3,546,908$144Mincrease2026-06-30
Neuberger Berman Group LLC3,228,635$131Mincrease2026-06-30
Morgan Stanley Institutional Investment Advisors LLC3,066,015$124Mdecrease2026-06-30
Franklin Resources3,060,961$124Mincrease2026-06-30
Geode Capital Management, LLC2,839,554$115Mincrease2026-06-30
Greenhouse Funds Lllp1,896,343$76.8Mdecrease2026-06-30
Van ECK Associates1,849,926$75.0Mdecrease2026-06-30

Oceaneering International's latest quarter

Oceaneering International, Q3 2026: revenue $785M (+6% year over year), operating margin 11.7%, net earnings $52.6M, operating cash flow $163M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most OII stock?

By the latest 13F filings: BlackRock ($665M); Vanguard Portfolio Management LLC ($321M); Vanguard Group ($297M); State Street ($202M); Brown Advisory ($201M).

What is the short interest in OII?

6,923,684 shares were sold short at the 2026-10-15 settlement, -0.02% of the float.

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Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.