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
$24.03
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares
95,570,219
Total reported value
$2,368,374,966
% of total 13F portfolios
0%
Share change
-578,154
Value change
-$11,760,645
Number of holders
296
Price from insider filings
$24.03
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 30 Sep 2025, 296 institutional investors reported holding 95,570,219 shares of OCEANEERING INTERNATIONAL INC - Common Stock (OII). This represents 95% 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 75% 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% 15,668,933 -0.56% 0.01% $388,276,155
VANGUARD GROUP INC 12% 12,183,440 -1.7% 0% $301,905,645
BROWN ADVISORY INC 7.7% 7,702,263 +4.9% 0.25% $190,862,081
STATE STREET CORP 4.4% 4,431,886 -7.9% 0% $109,822,135
EARNEST PARTNERS LLC 4% 4,016,698 -4.8% 0.43% $99,533,776
AMERICAN CENTURY COMPANIES INC 3.6% 3,642,873 +8.1% 0.05% $90,270,393
NEUBERGER BERMAN GROUP LLC 3.5% 3,539,558 -2.3% 0.06% $87,710,247
DIMENSIONAL FUND ADVISORS LP 3.3% 3,285,951 +3.1% 0.02% $81,428,521
Greenhouse Funds LLLP 2.5% 2,491,803 0% 2.4% $61,746,878
GEODE CAPITAL MANAGEMENT, LLC 2.2% 2,252,867 +0.18% 0% $55,838,390
LOOMIS SAYLES & CO L P 1.9% 1,897,037 -1.5% 0.06% $47,008,577
GOLDMAN SACHS GROUP INC 1.4% 1,425,378 +53% 0.01% $35,320,866
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 1.4% 1,417,423 +3.6% 0.01% $35,123,742
VAN ECK ASSOCIATES CORP 1.3% 1,329,295 +6.8% 0.03% $32,940,000
FORT WASHINGTON INVESTMENT ADVISORS INC /OH/ 1.3% 1,301,792 +15% 0.17% $32,258,406
ROYAL BANK OF CANADA 1.3% 1,288,903 -5.3% 0.01% $31,939,000
NORTHERN TRUST CORP 1.1% 1,131,907 -1.4% 0% $28,048,655
MORGAN STANLEY 1% 1,014,853 -3.4% 0% $25,148,071
Aristotle Capital Boston, LLC 0.84% 843,793 -3.1% 1.1% $20,909,192
JPMORGAN CHASE & CO 0.76% 763,907 +95% 0% $18,929,614
Nuveen, LLC 0.72% 720,028 -4.7% 0% $17,842,294
FRANKLIN RESOURCES INC 0.7% 702,746 -43% 0% $17,414,047
BANK OF AMERICA CORP /DE/ 0.7% 700,261 +30% 0% $17,352,467
Qube Research & Technologies Ltd 0.7% 699,380 -14% 0.02% $17,330,636
ALGERT GLOBAL LLC 0.65% 649,747 +74% 0.27% $16,101,000

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 1,238,475 $29,820,046 -$10,703,204 $24.03 24
2025 Q3 95,570,219 $2,368,374,966 -$11,760,645 $24.78 296
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