Borders & Southern shares fall 15% after Milei threatens sanctions on Falklands oil firms

Energy Written by: Ian Lyall 09:33 Fri 04 Sep 2026 --> Proactive has a commercial relationship with Borders & Southern Petroleum. This article was produced independently under Proactive's Editorial Standards Policy . Disclaimer No investment advice About this content Editorial Standards & Policies Share article About this content × About Ian Lyall Ian Lyall, a seasoned journalist and editor, brings over three decades of experience to his role as Managing Editor at Proactive. Overseeing Proactive's editorial and broadcast operations across six offices on three continents, Ian is responsible for quality control, editorial policy, and content production. He directs the creation of 50,000 pieces of real-time news, feature articles, and filmed interviews annually. Prior to Proactive, Ian helped lead the business output at the Daily... Read more About the publisher Proactive financial news and online broadcast teams provide fast, accessible, informative and actionable business and finance news content to a global investment audience. All our content is produced independently by our experienced and qualified teams of news journalists. Proactive news team spans the world’s key finance and investing hubs with bureaus and studios in London, New York, Toronto, Vancouver, Sydney and Perth. We are experts in medium and small-cap markets, we also keep our community up to date with blue-chip companies, commodities and broader investment stories. This is content that excites and engages motivated private investors. The team delivers news and unique insights across the market including but not confined to: biotech and pharma, mining and natural resources, battery metals, oil and gas, crypto and emerging digital and EV technologies. Use of technology Proactive has always been a forward looking and enthusiastic technology adopter. Our human content creators are equipped with many decades of valuable expertise and experience. The team also has access to and use technologies to assist and enhance workflows. Proactive will on occasion use automation and software tools, including generative AI. Nevertheless, all content published by Proactive is edited and authored by humans, in line with best practice in regard to content production and search engine optimisation. Borders & Southern Petroleum ( AIM:BOR ) View Price & Profile Borders & Southern shares fall 15% after Milei threatens sanctions on Falklands oil firms Published: 09:33 04 Sep 2026 BST Shares in Borders & Southern Petroleum (AIM:BOR) , the AIM-listed oil and gas explorer with licences in the Falkland Islands, fell 15% to 9.78p on Friday. The drop came after Argentina's president, Javier Milei, said he would speed up sanctions against companies involved in oil extraction projects near the islands. In a televised address on Thursday night, Milei named British firm Rockhopper Exploration and its partner Navitas Petroleum as the primary targets of the measures. He also referenced other companies holding exploration licences in the region, a group that includes Borders & Southern. The AIM-listed group holds a 100% interest in three production licences and a discovery area licence covering nearly 10,000 square kilometres of the South Falkland Basin. Its main asset is the Darwin discovery, part of licences estimated to contain 462 million barrels of recoverable liquid hydrocarbons. Milei's speech came as he cited comments from Donald Trump, who suggested this week that the US could reconsider its historic position on the islands' sovereignty. The Argentine president said "winds of change" now favoured his country's claim to the territory, which Argentina calls the Malvinas. He argued the sanctions were necessary to stop foreign companies from securing rights to oil reserves he considers Argentine. Milei also signed a decree to expand the defence ministry's budget for a new naval base in Tierra del Fuego. The UK government has said its position on the islands remains "long-standing and unwavering", pointing to a 2013 referendum in which 99.8% of islanders voted to remain a British overseas territory. Friday's fall extends a volatile period for Borders & Southern, whose stock has swung sharply in recent months on news tied to farm-out talks over Darwin and renewed activity at the offshore Sea Lion project. Continue reading