OCEANEERING INTERNATIONAL INC - Common Stock (OII) Institutional Ownership

13F Institutional Holders and Ownership History from Q1 2014 to Q4 2025

Type / Class
Equity / Common Stock
Symbol
OII on NYSE
Shares outstanding
100,513,239
Price per share
$29.17
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
99,445,053
Total reported value
$2,390,030,456
% of total 13F portfolios
0%
Share change
+5,228,240
Value change
+$125,339,840
Number of holders
298
Price from insider filings
$29.17
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of OCEANEERING INTERNATIONAL INC - Common Stock (OII) based on Schedule 13D/G filings

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
BROWN ADVISORY INC 6.6% +30% $117,943,701 +$26,113,588 6,618,614 +28% BROWN ADVISORY INC 31 Mar 2025
STATE STREET CORP 4.9% $88,907,312 4,989,187 STATE STREET CORPORATION 31 Dec 2024
EARNEST PARTNERS LLC 4.2% $75,153,961 4,217,394 EARNEST PARTNERS LLC 31 Mar 2025

As of 31 Dec 2025, 298 institutional investors reported holding 99,445,053 shares of OCEANEERING INTERNATIONAL INC - Common Stock (OII). This represents 99% of the company’s total 100,513,239 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of OCEANEERING INTERNATIONAL INC - Common Stock (OII) together control 78% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
BlackRock, Inc. 16% 16,003,350 +2.1% 0.01% $384,560,495
VANGUARD GROUP INC 12% 12,371,147 +1.5% 0% $297,278,664
BROWN ADVISORY INC 7.4% 7,426,981 -3.6% 0.25% $178,470,371
STATE STREET CORP 4.6% 4,647,252 +4.9% 0% $111,673,466
Morgan Stanley Institutional Investment Advisors LLC 3.9% 3,947,022 10% $94,846,948
EARNEST PARTNERS LLC 3.8% 3,791,599 -5.6% 0.39% $91,112,124
AMERICAN CENTURY COMPANIES INC 3.6% 3,608,090 -0.95% 0.04% $86,702,403
DIMENSIONAL FUND ADVISORS LP 3.5% 3,477,068 +5.8% 0.02% $83,556,317
NEUBERGER BERMAN GROUP LLC 3.3% 3,335,121 -5.8% 0.06% $80,142,958
Greenhouse Funds LLLP 2.5% 2,468,260 -0.94% 2.3% $59,312,288
GEODE CAPITAL MANAGEMENT, LLC 2.3% 2,304,738 +2.3% 0% $55,396,372
LOOMIS SAYLES & CO L P 1.8% 1,831,434 -3.5% 0.05% $44,009,359
VAN ECK ASSOCIATES CORP 1.5% 1,500,057 +13% 0.03% $36,047,000
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 1.4% 1,442,874 +1.8% 0.01% $34,672,262
GOLDMAN SACHS GROUP INC 1.3% 1,273,669 -11% 0% $30,606,266
ROYAL BANK OF CANADA 1.2% 1,221,789 -5.2% 0.01% $29,360,000
NORTHERN TRUST CORP 1.2% 1,216,859 +7.5% 0% $29,241,121
Qube Research & Technologies Ltd 1.2% 1,165,936 +67% 0.04% $28,017,442
MORGAN STANLEY 1% 1,041,053 +2.6% 0% $25,016,523
FORT WASHINGTON INVESTMENT ADVISORS INC /OH/ 0.85% 856,644 -34% 0.11% $20,585,155
Ranger Investment Management, L.P. 0.8% 802,635 +35% 1.3% $19,287,319
Fisher Asset Management, LLC 0.79% 793,098 +24% 0.01% $19,058,144
Bank of New York Mellon Corp 0.77% 770,246 +25% 0% $18,509,001
Nuveen, LLC 0.7% 700,281 -2.7% 0% $16,827,753
ALGERT GLOBAL LLC 0.7% 699,646 +7.7% 0.26% $16,812,000

Institutional Holders of OCEANEERING INTERNATIONAL INC - Common Stock (OII) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 99,445,053 $2,390,030,456 +$125,339,840 $24.03 298
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
2019 Q4 97,035,836 $1,446,572,082 +$53,522,690 $14.91 208
2019 Q3 93,633,873 $1,268,675,196 -$47,190,978 $13.55 201
2019 Q2 96,082,679 $1,958,430,104 -$4,003,651 $20.39 197
2019 Q1 97,511,658 $1,537,648,335 -$25,737,812 $15.77 208
2018 Q4 99,184,138 $1,200,317,472 -$35,952,080 $12.10 194
2018 Q3 99,827,062 $2,754,955,199 -$146,652,477 $27.60 223
2018 Q2 106,360,075 $2,708,790,918 +$108,381,686 $25.46 229
2018 Q1 102,685,641 $1,907,399,967 +$92,713,395 $18.54 225
2017 Q4 98,437,313 $2,080,915,603 -$134,454,824 $21.14 241
2017 Q3 103,233,337 $2,712,558,515 +$100,174,744 $26.27 262
2017 Q2 99,963,497 $2,283,346,782 +$46,677,786 $22.84 262
2017 Q1 98,013,201 $2,653,934,048 +$223,502,071 $27.08 267
2016 Q4 98,230,663 $2,770,829,486 -$43,386,163 $28.21 303
2016 Q3 99,550,840 $2,736,503,125 +$44,767,749 $27.51 290
2016 Q2 97,320,804 $2,905,805,135 +$27,143,855 $29.86 317
2016 Q1 96,554,051 $3,210,072,166 +$41,591,094 $33.24 324
2015 Q4 94,330,758 $3,538,825,629 +$16,617,087 $37.52 329
2015 Q3 93,746,721 $3,681,144,285 +$88,437,585 $39.28 332
2015 Q2 90,411,442 $4,211,476,795 -$151,749,746 $46.59 345
2015 Q1 93,063,051 $5,019,162,028 -$16,635,281 $53.93 360
2014 Q4 92,890,767 $5,461,243,343 -$261,726,180 $58.81 376
2014 Q3 99,150,419 $6,461,728,710 -$35,348,223 $65.17 368
2014 Q2 98,191,182 $7,670,841,423 -$35,302,610 $78.13 389
2014 Q1 98,942,100 $7,110,205,612 +$52,224,404 $71.86 396