13F reference period
Q2 2026
Security Snapshot
OCEANEERING INTERNATIONAL INC - Common Stock (OII) Institutional Ownership
CUSIP: 675232102
13F Institutional Holders and Ownership History from Q1 2014 to Q3 2026
Institutions Reporting
374
Shares (Excl. Options)
104,285,565
Price
$40.52
The headline uses the Q2 2026 reference period after its reporting deadline. Available reports may still be incomplete or amended. Newer periods in the history table contain incoming reports and may be incomplete.
Save this security page for your next review
Watchlists follow companies and investors, across their share classes. Bookmark this page to revisit this specific CUSIP and its quarterly holders. If you create an account from here, we will bring you back after verification.
- Security type / class
- Equity / Common Stock
- Symbol
- OII on NYSE
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 104,285,565
- Total 13F value
- $4,223,686,431
- Portfolio coverage rank
- 0%
- Share change
- +2,911,032
- Value change
- +$133,757,823
- Number of holders
- 374
- Shares outstanding
- 99,761,356
- SEC-reported price per share
- $43.63
- Insider filing price
- $43.63
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Filing notes and source
Key facts
- OII - OCEANEERING INTERNATIONAL INC - Common Stock is tracked under CUSIP 675232102.
- 374 institutions reported positions in Q2 2026.
- 6 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 366 to 374 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $3,604,176,864 to $4,223,686,431.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 374 institutions filings for Q2 2026.
Security key
675232102
13F reference period
Q2 2026
13F holders
374
13D/G owners
6
CIK / CUSIP context first
Open Q2 2026 holders
OII full holder history
OCEANEERING INTERNATIONAL INC SEC filings
OCEANEERING INTERNATIONAL INC company facts
OCEANEERING INTERNATIONAL INC insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 675232102:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
6
Security
OII
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 14% | $295,734,074 | 14,272,880 | BlackRock, Inc. | 30 Jun 2025 | |||
| VANGUARD PORTFOLIO MANAGEMENT LLC | 7.7% | $271,726,873 | 7,660,752 | Vanguard Portfolio Management | 31 Mar 2026 | |||
| VANGUARD CAPITAL MANAGEMENT LLC | 5.3% | $185,496,856 | 5,229,683 | Vanguard Capital Management | 31 Mar 2026 | |||
| BROWN ADVISORY INC | 5.1% | -22% | $219,464,807 | -$66,591,690 | 5,077,853 | -23% | BROWN ADVISORY INC | 30 Jun 2026 |
| STATE STREET CORP | 5.1% | +4% | $188,429,956 | +$1,684,687 | 5,034,196 | +0.9% | STATE STREET CORPORATION | 31 Mar 2026 |
| EARNEST PARTNERS LLC | 4.2% | $75,153,961 | 4,217,394 | EARNEST PARTNERS LLC | 31 Mar 2025 |
As of 30 Jun 2026, 374 institutional investors reported holding 104,285,565 shares of OCEANEERING INTERNATIONAL INC - Common Stock (OII). This represents 105% of the company’s total 99,761,356 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
81%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 16% | 16,403,230 | +0.33% | 0.01% | $664,658,871 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 7.9% | 7,926,938 | +4.6% | 0.01% | $321,199,528 |
| STATE STREET CORP | 5% | 4,994,403 | -0.79% | 0.01% | $202,373,210 |
| BROWN ADVISORY INC | 5% | 4,967,307 | -14% | 0.31% | $201,275,310 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.5% | 4,485,268 | +0.15% | 0% | $181,743,059 |
| AMERICAN CENTURY COMPANIES INC | 4% | 4,023,994 | +6.8% | 0.07% | $163,052,237 |
| EARNEST PARTNERS LLC | 3.6% | 3,547,295 | -3.7% | 0.52% | $143,736,393 |
| DIMENSIONAL FUND ADVISORS LP | 3.6% | 3,546,908 | +2.5% | 0.03% | $143,711,903 |
| NEUBERGER BERMAN GROUP LLC | 3.2% | 3,228,635 | +0.32% | 0.09% | $130,824,290 |
| Morgan Stanley Institutional Investment Advisors LLC | 3.1% | 3,066,015 | -11% | 12% | $124,234,908 |
| FRANKLIN RESOURCES INC | 3.1% | 3,060,961 | +270% | 0.03% | $124,030,139 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.8% | 2,839,554 | +19% | 0.01% | $115,079,025 |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC | 2.3% | 2,272,949 | +60% | 0.28% | $92,099,893 |
| Greenhouse Funds LLLP | 1.9% | 1,896,343 | -6.7% | 4% | $76,839,818 |
| VAN ECK ASSOCIATES CORP | 1.9% | 1,849,926 | -10% | 0.05% | $74,959,002 |
| REINHART PARTNERS, LLC. | 1.7% | 1,648,423 | 1.5% | $66,794,700 | |
| LOOMIS SAYLES & CO L P | 1.6% | 1,606,095 | -5.5% | 0.08% | $65,078,970 |
| NORTHERN TRUST CORP | 1.4% | 1,371,471 | +8.2% | 0.01% | $55,572,005 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.3% | 1,339,591 | -3.1% | 0.01% | $54,280,227 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 1.3% | 1,330,080 | 0.08% | $53,895,000 | |
| PRICE T ROWE ASSOCIATES INC /MD/ | 1.3% | 1,320,910 | +2% | 0.01% | $53,524,000 |
| MORGAN STANLEY | 1.2% | 1,207,486 | +16% | 0% | $48,927,368 |
| Bank of New York Mellon Corp | 1.1% | 1,126,793 | +49% | 0.01% | $45,657,643 |
| GOLDMAN SACHS GROUP INC | 1.1% | 1,076,557 | +7.7% | 0% | $43,622,089 |
| ROYAL BANK OF CANADA | 0.93% | 932,192 | -11% | 0.01% | $37,772,000 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
51
Headline period
Q2 2026
Rows shown
1-25 of 51
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q3 | 3,090,924 | $134,880,408 | +$1,048,480 | $43.63 | 63 |
| 2026 Q2 | 104,285,565 | $4,223,686,431 | +$133,757,823 | $40.52 | 374 |
| 2026 Q1 | 101,689,846 | $3,604,176,864 | +$69,483,883 | $35.47 | 366 |
| 2025 Q4 | 100,127,451 | $2,406,758,674 | +$121,376,697 | $24.03 | 313 |
| 2025 Q3 | 95,573,974 | $2,368,467,686 | -$9,783,563 | $24.78 | 298 |
| 2025 Q2 | 95,912,085 | $1,987,326,055 | -$7,882,675 | $20.72 | 287 |
| 2025 Q1 | 96,109,019 | $2,095,651,139 | -$98,467,849 | $21.81 | 284 |
| 2024 Q4 | 100,523,702 | $2,621,074,603 | -$9,529,350 | $26.08 | 284 |
| 2024 Q3 | 101,017,907 | $2,511,638,384 | +$8,121,277 | $24.87 | 257 |
| 2024 Q2 | 100,043,364 | $2,366,910,482 | +$104,454,657 | $23.66 | 232 |
| 2024 Q1 | 95,752,227 | $2,240,589,594 | +$51,252,288 | $23.40 | 229 |
| 2023 Q4 | 94,418,641 | $2,009,201,081 | +$18,138,819 | $21.28 | 233 |
| 2023 Q3 | 92,745,400 | $2,385,369,802 | -$22,246,761 | $25.72 | 240 |
| 2023 Q2 | 93,941,388 | $1,756,631,378 | -$17,178,595 | $18.70 | 222 |
| 2023 Q1 | 94,867,239 | $1,672,526,247 | +$36,643,730 | $17.63 | 225 |
| 2022 Q4 | 93,228,612 | $1,630,687,714 | +$51,579,162 | $17.49 | 198 |
| 2022 Q3 | 91,197,043 | $726,032,583 | -$16,740,899 | $7.96 | 190 |
| 2022 Q2 | 92,360,200 | $986,313,378 | +$19,939,170 | $10.68 | 191 |
| 2022 Q1 | 89,893,243 | $1,364,368,097 | +$47,228,529 | $15.16 | 210 |
| 2021 Q4 | 86,960,462 | $983,583,740 | -$5,589,649 | $11.31 | 191 |
| 2021 Q3 | 86,845,380 | $1,157,133,167 | -$13,150,205 | $13.32 | 188 |
| 2021 Q2 | 87,591,053 | $1,364,131,899 | +$13,349,291 | $15.57 | 183 |
| 2021 Q1 | 87,051,252 | $993,718,903 | +$7,805,820 | $11.42 | 172 |
| 2020 Q4 | 86,496,402 | $687,662,236 | +$9,218,372 | $7.95 | 170 |
| 2020 Q3 | 84,141,808 | $296,704,110 | -$12,028,501 | $3.52 | 154 |