Oceaneering International
OII · NYSE
$44.07−$0.36 (−0.81%)TodayMarket closed ·
Prev close $44.43
Who owns OII
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 54.6% of OII’s shares.
- BlackRock Institutional Trust Company, N.A.14.6%
- Vanguard Portfolio Management, LLC8.0%
- State Street Investment Management (US)5.0%
- Brown Advisory5.0%
- Next 6 largest institutions22.0%
- All other shareholders45.4%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 14.54M | 14.61% |
| Vanguard Portfolio Management, LLC | 7.93M | 7.96% |
| State Street Investment Management (US) | 4.99M | 5.02% |
| Brown Advisory | 4.97M | 4.99% |
| Vanguard Capital Management, LLC | 4.49M | 4.51% |
| American Century Investment Management, Inc. | 4.02M | 4.04% |
| EARNEST Partners, LLC | 3.55M | 3.56% |
| Dimensional Fund Advisors, L.P. | 3.55M | 3.56% |
| Neuberger Berman, LLC | 3.23M | 3.24% |
| Morgan Stanley Institutional Investment Advisors LLC | 3.07M | 3.08% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| iShares Core S&P Small-Cap ETF | 6.08M | 6.11% |
| Avantis US Small Cap Value ETF | 3.61M | 3.63% |
| Vanguard Total Stock Market Index Fund | 3.18M | 3.19% |
| iShares Russell 2000 ETF | 2.59M | 2.60% |
| Vanguard Small-Cap Index Fund | 2.29M | 2.30% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $4.71M (10 trades) of OII on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| LARSON RODERICK A. | Sale | 4.30K | $190.83K |
| LARSON RODERICK A. | Sale | 1.70K | $74.14K |
| MURPHY PAUL B JR | Sale | 10.00K | $483.69K |
| DYER CHRISTOPHER J | Sale | 1.20K | $57.18K |
| Childress Earl | Sale | 12.70K | $593.31K |
| MCEVOY M KEVIN | Sale | 3.00K | $143.77K |
| GOODWIN DEANNA L | Sale | 7.00K | $284.83K |
| LARSON RODERICK A. | Sale | 5.00K | $191.35K |
| Beachy Karen H | Award | 4.58K | — |
| Poddar Reema | Award | 4.58K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 6.93M
- Days to cover
- 6.92
- % of shares outstanding
- 6.96%
- Average daily volume
- 1.00M
- Change since last report
- −8.1%
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