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| | | | Exhibit 21.01 |
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| SUBSIDIARIES OF OCEANEERING INTERNATIONAL, INC. |
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| Subsidiaries | | Percentage of Ownership by Oceaneering International, Inc. | | Jurisdiction of Organization |
| Oceaneering Angola, S.A. | | 45% | | Angola |
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| Marine Production Systems Do Brasil Ltda. | | 100% | | Brazil |
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| Marine Production Systems, Ltd. | | 100% | | Delaware |
| Oceaneering Canada Limited | | 100% | | Delaware |
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| C & C Technologies, Inc. | | 100% | | Louisiana |
| Oceaneering Holdings Sarl | | 100% | | Luxembourg |
| Oceaneering International Holdings Sarl | | 100% | | Luxembourg |
| Oceaneering Luxembourg Sarl | | 100% | | Luxembourg |
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| Oceaneering Services (Malaysia) Sdn Bhd | | 100% | | Malaysia |
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| Oceaneering Mobile Robotics B.V. | | 100% | | Netherlands |
| Oceaneering AS | | 100% | | Norway |
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| Oceaneering Services PNG Ltd. | | 100% | | Papua New Guinea |
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| Oceaneering International GmbH | | 100% | | Switzerland |
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| Grayloc Products, L.L.C. | | 100% | | Texas |
| C & C Technologies (Thailand) Co., Ltd. | | 100% | | Thailand |
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| Oceaneering Mobile Workforce Limited | | 100% | | United Arab Emirates |
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| Grayloc Products Ltd. | | 100% | | United Kingdom |
| Oceaneering International Services Limited | | 100% | | United Kingdom |
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