Rockhopper Exploration shares plunge amid Sea Lion project challenges

Shares of British oil company Rockhopper Exploration plummeted nearly 20% on the London Stock Exchange following reports of operational complications and intensifying geopolitical pressure regarding the Sea Lion offshore project in the Falkland Islands.

Navitas Petroleum, the project operator holding a 65% stake, confirmed it is working to replace two contractors that withdrew from the development. The withdrawal follows legal and administrative sanctions from the Argentine government, which has intensified its claims of sovereignty and pursued judicial actions against companies operating in the area without its authorization. One notable contractor, Halliburton, reportedly announced it would not participate in exploration or production activities around the islands due to new Argentine civil and criminal legislation.

Despite these setbacks, Rockhopper and Navitas have reaffirmed their commitment to the project, stating they do not expect a material adverse effect on the development timeline. The current plan aims to begin drilling in early 2027, with commercial production targeted for the first quarter of 2028. The Argentine government, under President Javier Milei, has instructed the start of international arbitration under the United Nations Convention on the Law of the Sea to challenge the project.