Latest Period
Q1 2026
Security Snapshot
OCEANEERING INTERNATIONAL INC - COMMON STOCK (OII) Institutional Ownership
CUSIP: 675232102
13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026
Institutions Reporting
365
Shares (Excl. Options)
101,689,845
Price
$35.47
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- Security type / class
- Equity / COMMON STOCK
- Symbol
- OII on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 101,689,845
- Total 13F value
- $3,604,176,998
- Portfolio coverage rank
- 0.01%
- Share change
- +1,301,971
- Value change
- +$69,488,946
- Number of holders
- 365
- Shares outstanding
- 98,709,725
- SEC-reported price per share
- $38.29
- Insider filing price
- $38.29
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
Key facts
- OII - OCEANEERING INTERNATIONAL INC - COMMON STOCK is tracked under CUSIP 675232102.
- 365 institutions reported positions in Q1 2026.
- 6 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 312 to 365 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $2,406,758,290 to $3,604,176,998.
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 365 institutions filings for Q1 2026.
Security key
675232102
Latest holder period
Q1 2026
13F holders
365
13D/G owners
6
CIK / CUSIP context first
Open Q1 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 | |||
| BROWN ADVISORY INC | 6.6% | +30% | $117,943,701 | +$26,113,588 | 6,618,614 | +28% | BROWN ADVISORY INC | 31 Mar 2025 |
| VANGUARD CAPITAL MANAGEMENT LLC | 5.3% | $185,496,856 | 5,229,683 | Vanguard Capital Management | 31 Mar 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 31 Mar 2026, 365 institutional investors reported holding 101,689,845 shares of OCEANEERING INTERNATIONAL INC - COMMON STOCK (OII). This represents 103% of the company’s total 98,709,725 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
78%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 17% | 16,348,842 | +2.2% | 0.01% | $579,893,415 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 7.7% | 7,578,921 | 0% | 0.01% | $268,824,328 |
| BROWN ADVISORY INC | 5.9% | 5,788,601 | -22% | 0.34% | $205,321,688 |
| STATE STREET CORP | 5.1% | 5,034,196 | +8.3% | 0.01% | $178,562,932 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.5% | 4,478,763 | 0% | 0% | $158,861,724 |
| AMERICAN CENTURY COMPANIES INC | 3.8% | 3,766,674 | +4.4% | 0.07% | $133,603,927 |
| EARNEST PARTNERS LLC | 3.7% | 3,684,313 | -2.8% | 0.54% | $130,682,582 |
| DIMENSIONAL FUND ADVISORS LP | 3.5% | 3,461,749 | -0.44% | 0.03% | $122,780,112 |
| Morgan Stanley Institutional Investment Advisors LLC | 3.5% | 3,453,005 | -13% | 12% | $122,478,102 |
| NEUBERGER BERMAN GROUP LLC | 3.3% | 3,218,259 | -3.5% | 0.09% | $114,151,647 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.4% | 2,376,461 | +3.1% | 0.01% | $84,308,259 |
| VAN ECK ASSOCIATES CORP | 2.1% | 2,061,487 | +37% | 0.05% | $73,121,000 |
| Greenhouse Funds LLLP | 2.1% | 2,032,489 | -18% | 3.4% | $72,092,385 |
| LOOMIS SAYLES & CO L P | 1.7% | 1,700,289 | -7.2% | 0.08% | $60,309,251 |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC | 1.4% | 1,420,954 | 0.17% | $50,401,238 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.4% | 1,383,124 | -4.1% | 0.01% | $49,059,408 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 1.3% | 1,295,245 | +1179% | 0.01% | $45,943,000 |
| NORTHERN TRUST CORP | 1.3% | 1,267,928 | +4.2% | 0.01% | $44,973,405 |
| ROYAL BANK OF CANADA | 1.1% | 1,048,210 | -14% | 0.01% | $37,180,000 |
| MORGAN STANLEY | 1.1% | 1,040,333 | -0.07% | 0% | $36,900,630 |
| GOLDMAN SACHS GROUP INC | 1% | 999,891 | -21% | 0% | $35,466,134 |
| Boston Partners | 0.87% | 854,941 | 0.03% | $30,335,854 | |
| FRANKLIN RESOURCES INC | 0.84% | 828,372 | +86% | 0.01% | $29,382,354 |
| Ranger Investment Management, L.P. | 0.81% | 796,595 | -0.75% | 2% | $28,255,225 |
| Fisher Asset Management, LLC | 0.8% | 792,269 | -0.1% | 0.01% | $28,101,780 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
49
Latest
Q1 2026
Rows shown
1-25 of 49
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 101,689,845 | $3,604,176,998 | +$69,488,946 | $35.47 | 365 |
| 2025 Q4 | 100,127,435 | $2,406,758,290 | +$121,376,697 | $24.03 | 312 |
| 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 |
| 2020 Q2 | 86,006,087 | $549,163,219 | -$8,836,119 | $6.39 | 167 |
| 2020 Q1 | 89,886,824 | $264,482,330 | -$119,678,277 | $2.94 | 169 |