Oceaneering International, Inc.
US ˙ NYSE ˙ US6752321025

SecurityOII / Oceaneering International, Inc.
InstitutionMan Group plc
Latest Disclosed Ownership24,178 shares
Latest Disclosed Value $ 857,594
Man Group plc reports 24.98% increase in ownership of OII / Oceaneering International, Inc.

On May 15, 2026 - Man Group plc filed a 13F-HR form disclosing ownership of 24,178 shares of Oceaneering International, Inc. (US:OII) valued at $857,594 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 19,346 shares of Oceaneering International, Inc.. This represents a change in shares of 24.98% during the quarter. The current value of the position is $918,522 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 24,178 4,832 24.98 858 84.70 0.0016
2026-02-17 2025-12-31 13F OCEANEERING INTL COM 675232102 19,346 1,516 8.50 465 5.22 0.0008
2025-11-14 2025-09-30 13F OCEANEERING INTL COM 675232102 17,830 30 0.17 442 19.84 0.0008
2025-08-14 2025-06-30 13F OCEANEERING INTL COM 675232102 17,800 -472 -2.58 369 -7.54 0.0007
2025-05-15 2025-03-31 13F OCEANEERING INTL COM 675232102 18,272 -43 -0.23 399 -16.56 0.0010
2025-02-14 2024-12-31 13F OCEANEERING INTL COM 675232102 18,315 -985 -5.10 478 -0.42 0.0013
2024-11-14 2024-09-30 13F OCEANEERING INTL COM 675232102 19,300 -41,706 -68.36 480 -66.81 0.0012
2024-08-14 2024-06-30 13F OCEANEERING INTL COM 675232102 61,006 42,354 227.07 1,443 230.96 0.0036
2024-05-15 2024-03-31 13F OCEANEERING INTL COM 675232102 18,652 4,311 30.06 436 42.95 0.0011
2024-02-14 2023-12-31 13F OCEANEERING INTL COM 675232102 14,341 305 -75.26 0.0008
2023-11-14 2023-09-30 13F OCEANEERING INTL COM 675232102 1,234 280.56 0.0038
2023-08-14 2023-06-30 13F OCEANEERING INTL COM 675232102 17,331 17,331 324 0.0010
2023-05-15 2023-03-31 13F OCEANEERING INTL COM 675232102 0 -23,846 -100.00 0 -100.00
2023-02-14 2022-12-31 13F OCEANEERING INTL COM 675232102 23,846 -11,081 -31.73 417 50.00 0.0015
2022-11-14 2022-09-30 13F OCEANEERING INTL COM 675232102 34,927 278 -56.01 0.0013
2022-08-15 2022-06-30 13F OCEANEERING INTL COM 675232102 632 51.92 0.0027
2022-05-16 2022-03-31 13F OCEANEERING INTL COM 675232102 27,404 27,404 416 0.0014
2021-08-16 2021-06-30 13F OCEANEERING INTL COM 675232102 0 -16,624 -100.00 0 -100.00
2021-05-17 2021-03-31 13F OCEANEERING INTL COM 675232102 16,624 -12,076 -42.08 190 -16.67 0.0008
2021-02-16 2020-12-31 13F OCEANEERING INTL COM 675232102 28,700 28,700 228 0.0010
2020-05-15 2020-03-31 13F OCEANEERING INTL COM 675232102 0 -63,284 -100.00 0 -100.00
2020-02-18 2019-12-31 13F OCEANEERING INTL COM 675232102 63,284 63,284 944 0.0031
2019-08-14 2019-06-30 13F OCEANEERING INTL COM 675232102 0 -56,654 -100.00 0 -100.00
2019-05-15 2019-03-31 13F OCEANEERING INTL COM 675232102 56,654 56,654 893 0.0034
2018-08-14 2018-06-30 13F OCEANEERING INTL COM 675232102 0 -25,406 -100.00 0 -100.00
2018-05-15 2018-03-31 13F OCEANEERING INTL COM 675232102 25,406 25,406 471 0.0022
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.