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
-$11,760,635
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% $285,743,058 14,272,880 BlackRock, Inc. 30 Jun 2025
BROWN ADVISORY INC 6.6% +30% $144,351,971 +$31,960,570 6,618,614 +28% BROWN ADVISORY INC 31 Mar 2025
STATE STREET CORP 4.9% $108,814,168 4,989,187 STATE STREET CORPORATION 31 Dec 2024
EARNEST PARTNERS LLC 4.2% $91,981,363 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 1,092,416 $26,310,247 -$10,837,820 $24.03 14
2025 Q3 95,570,219 $2,368,374,966 -$11,760,635 $24.78 296
2025 Q2 95,912,085 $1,987,326,055 -$7,882,662 $20.72 287
2025 Q1 96,090,170 $2,095,240,523 -$98,580,763 $21.81 283
2024 Q4 100,517,566 $2,620,868,758 +$369,566 $26.08 283
2024 Q3 100,632,301 $2,502,048,740 -$1,261,683 $24.87 255
2024 Q2 100,058,895 $2,367,278,171 +$120,228,506 $23.66 232
2024 Q1 95,109,808 $2,225,557,318 +$23,249,157 $23.40 227
2023 Q4 5,013,652 $106,690,515 -$1,183,658 $21.28 2
2023 Q3 90,179,163 $2,319,365,587 -$31,916,949 $25.72 237
2023 Q2 92,647,819 $1,732,442,228 -$39,802,940 $18.70 219
2023 Q1 94,867,084 $1,672,523,431 +$39,216,656 $17.63 224
2022 Q4 93,139,587 $1,629,130,990 +$49,154,852 $17.49 197
2022 Q3 90,865,408 $723,392,328 -$15,125,442 $7.96 188
2022 Q2 89,648,164 $956,713,010 +$25,041,288 $10.68 186
2022 Q1 89,891,497 $1,364,342,097 +$47,298,351 $15.16 209
2021 Q4 86,061,526 $973,416,740 -$6,870,386 $11.31 188
2021 Q3 86,721,350 $1,155,549,167 -$14,087,760 $13.32 187
2021 Q2 86,202,846 $1,342,089,899 +$4,771,030 $15.57 184
2021 Q1 85,548,897 $976,562,903 +$9,352,302 $11.42 170
2020 Q4 86,374,563 $686,692,236 +$8,905,037 $7.95 168
2020 Q3 67,880,758 $239,464,110 -$2,028,427 $3.52 150
2020 Q2 85,049,727 $543,055,219 -$12,308,072 $6.39 161
2020 Q1 76,488,109 $225,090,330 -$117,143,923 $2.94 166
2019 Q4 96,714,617 $1,441,783,082 +$57,758,277 $14.91 203
2019 Q3 90,277,301 $1,223,194,196 -$52,298,529 $13.55 193
2019 Q2 93,582,056 $1,907,446,104 +$34,865,677 $20.39 194
2019 Q1 97,222,313 $1,533,084,335 -$20,544,847 $15.77 203
2018 Q4 98,990,858 $1,197,978,472 -$32,109,161 $12.10 190
2018 Q3 99,827,062 $2,754,955,199 -$146,654,813 $27.60 223
2018 Q2 105,380,732 $2,682,964,918 +$144,140,619 $25.46 223
2018 Q1 102,275,396 $1,899,793,967 +$86,950,591 $18.54 221
2017 Q4 97,684,859 $2,065,009,603 -$132,488,703 $21.14 236
2017 Q3 102,479,253 $2,691,813,515 +$102,362,290 $26.27 255
2017 Q2 99,773,088 $2,279,009,782 +$38,900,373 $22.84 259
2017 Q1 94,863,772 $2,568,539,156 +$203,466,502 $27.08 263
2016 Q4 98,029,447 $2,765,152,486 -$44,393,676 $28.21 299
2016 Q3 99,541,350 $2,736,241,125 +$45,023,819 $27.51 288
2016 Q2 97,256,418 $2,903,882,135 +$35,609,474 $29.86 313
2016 Q1 95,748,900 $3,183,312,166 +$34,961,174 $33.24 320
2015 Q4 94,308,607 $3,538,006,629 +$17,897,175 $37.52 327
2015 Q3 91,620,915 $3,597,643,285 +$67,636,248 $39.28 329
2015 Q2 89,205,005 $4,155,292,795 -$133,446,412 $46.59 343
2015 Q1 92,937,649 $5,012,398,716 -$18,993,094 $53.93 359
2014 Q4 92,783,066 $5,454,910,343 -$209,277,228 $58.81 375
2014 Q3 98,955,349 $6,449,016,710 -$24,937,978 $65.17 367
2014 Q2 98,191,182 $7,670,841,423 -$27,577,887 $78.13 389
2014 Q1 98,599,791 $7,085,608,612 +$53,583,851 $71.86 393