Oceaneering International, Inc.
US ˙ NYSE ˙ US6752321025

SecurityOII / Oceaneering International, Inc.
InstitutionQube Research & Technologies Ltd
Latest Disclosed Ownership588,323 shares
Latest Disclosed Value $ 20,867,817
Qube Research & Technologies Ltd reports 49.54% decrease in ownership of OII / Oceaneering International, Inc.

On May 15, 2026 - Qube Research & Technologies Ltd filed a 13F-HR form disclosing ownership of 588,323 shares of Oceaneering International, Inc. (US:OII) valued at $20,867,817 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,165,936 shares of Oceaneering International, Inc.. This represents a change in shares of -49.54% during the quarter. The current value of the position is $22,350,391 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F OCEANEERING INTL COM 675232102 588,323 -577,613 -49.54 20,868 -25.52 0.0232
2026-02-17 2025-12-31 13F OCEANEERING INTL COM 675232102 1,165,936 466,556 66.71 28,017 61.67 0.0285
2025-11-14 2025-09-30 13F OCEANEERING INTL COM 675232102 699,380 -112,945 -13.90 17,331 2.96 0.0179
2025-08-14 2025-06-30 13F OCEANEERING INTL COM 675232102 812,325 182,825 29.04 16,831 22.59 0.0171
2025-05-15 2025-03-31 13F OCEANEERING INTL COM 675232102 629,500 332,723 112.11 13,729 77.40 0.0159
2025-02-14 2024-12-31 13F OCEANEERING INTL COM 675232102 296,777 59,426 25.04 7,740 31.13 0.0101
2024-11-14 2024-09-30 13F OCEANEERING INTL COM 675232102 237,351 -91,967 -27.93 5,903 -24.25 0.0087
2024-08-14 2024-06-30 13F OCEANEERING INTL COM 675232102 329,318 79,899 32.03 7,792 33.50 0.0123
2024-05-14 2024-03-31 13F OCEANEERING INTL COM 675232102 249,419 33,301 15.41 5,836 26.92 0.0093
2024-02-13 2023-12-31 13F OCEANEERING INTL COM 675232102 216,118 216,118 4,599 0.0090
2023-11-13 2023-09-30 13F OCEANEERING INTL COM 675232102 0 -27,383 -100.00 0 -100.00
2023-08-14 2023-06-30 13F OCEANEERING INTL COM 675232102 27,383 24 0.09 512 6.22 0.0019
2023-05-15 2023-03-31 13F OCEANEERING INTL COM 675232102 27,359 27,359 482 0.0021
2022-08-15 2022-06-30 13F OCEANEERING INTL COM 675232102 0 -110,338 -100.00 0 -100.00
2022-05-09 2022-03-31 13F OCEANEERING INTL COM 675232102 110,338 87,100 374.82 1,673 536.12 0.0142
2022-02-10 2021-12-31 13F/A-1 OCEANEERING INTL COM 675232102 23,238 -7,874 -25.31 263 -36.47 0.0020
2022-02-01 2021-12-31 13F OCEANEERING INTL COM 675232102 23,238 -7,874 263 0.0020
2021-11-12 2021-09-30 13F OCEANEERING INTL COM 675232102 31,112 12,093 63.58 414 39.86 0.0052
2021-08-13 2021-06-30 13F OCEANEERING INTL COM 675232102 19,019 831 4.57 296 42.31 0.0034
2021-05-14 2021-03-31 13F OCEANEERING INTL COM 675232102 18,188 18,188 208 0.0033
2020-11-12 2020-09-30 13F OCEANEERING INTL COM 675232102 0 -84,897 -100.00 0 -100.00
2020-08-14 2020-06-30 13F OCEANEERING INTL COM 675232102 84,897 6,350 8.08 542 134.63 0.0080
2020-05-15 2020-03-31 13F OCEANEERING INTL COM 675232102 78,547 78,547 231 0.0095
2019-02-14 2018-12-31 13F OCEANEERING INTL COM 675232102 0 -3,511 -100.00 0 -100.00
2018-11-14 2018-09-30 13F OCEANEERING INTL COM 675232102 3,511 3,511 97 0.0129
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.