Australis Oil & Gas Limited (ASX:ATS; OTC:ASTTF) is an Australia-based upstream oil and gas company focused on the exploration, development, and production of unconventional oil and gas assets in the United States; its principal operations center on the Tuscaloosa Marine Shale (TMS) play, where it holds interests covering approximately 48,000 net acres in Louisiana and Mississippi, positioning it as the largest land owner and operator in the core area of this emerging onshore oil shale basin. The company offers oil and gas production from existing wells, alongside development of large proven undeveloped resources through controlled capital programs that emphasize profitable extraction at current oil prices with upside potential from price improvements; it targets oil shale development via drilling, hydraulic fracturing, and monetization strategies in the Oil & Gas Production, Exploration, and Other segments. Founded in 2014 by the team behind Aurora Oil & Gas and headquartered in Subiaco, Western Australia, Australis conducts its activities primarily in the USA while administered from Australia. In late November 2025, Australis executed key transactions to advance TMS development and strengthen its balance sheet, including a development partnering agreement with a US-listed independent oil and gas company under which the partner funds up to A$70.4 million (US$46 million) in a carry program for Australis' 20% working interest to earn 80% in undeveloped operated acreage and portions of non-operated holdings; concurrently, it agreed to sell 90% of its working interest in existing producing TMS wells to an affiliate of EQV Group for approximately A$25.9 million (US$16.9 million), enabling the elimination of roughly A$7.5 million (US$4.9 million) in debt and a pro-forma cash balance of A$18.4 million (US$12 million) as of 1 January 2026. These deals preserve economic interests in undeveloped acreage, provide carried funding for drilling, and enhance liquidity to support long-term TMS goals.