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| Name of Subsidiary | | Jurisdiction of Incorporation or Organization |
| Chord Energy LLC | | Delaware |
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| Oasis Petroleum North America LLC | | Delaware |
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| Oasis Petroleum Permian LLC | | Delaware |
| | |
| Oasis Petroleum Marketing LLC | | Delaware |
| | |
| Oasis Well Services LLC | | Delaware |
| | |
| OMS Holdings LLC | | Delaware |
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| Oasis Investment Holdings LLC | | Delaware |
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| Oasis SASR Holdings LLC | | Delaware |
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| Spark Acquisition ULC | | Alberta |
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| Spark Canadian Holdings Inc. | | Delaware |
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| Whiting Holdings LLC | | Delaware |
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| Whiting Oil and Gas Corporation | | Delaware |
| | |
| Whiting Programs, Inc. | | Delaware |
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| Whiting ND Sakakawea LLC | | Delaware |
| | |