ASX Announcement Release date: 19 March 2026 Bass Secures Approval to Award Drilling Contract for Bunian 6 Oil Development Well Bass Oil Limited (ASX:BAS) is an Australian-listed oil producer holding a majority interest in eight permits in the Cooper Basin including the 100% owned Worrior and Padulla oil fields and a 55% interest in a South Sumatra Basin KSO. Bass Oil Limited (ASX:BAS) (“Bass” or the “Company”) advises that the Indonesian Regulator has approved the award of the drilling contract for the drilling of the Bunian 6 oil development well. The rig selected is currently on contract to Pertamina EP and expected to move onto the Bunian 6 well location (see Figure 1) to commence drilling in May. All materials required for the drilling and completion of the well are already on site. The Bunian 6 well is the final element of the firm work program commitment for the permit. Bass is operator and 55% interest holder in the permit (KSO) which contains the Bunian oil field. The KSO is currently producing 250 barrels of oil per day (bopd). Bunian 6 is forecast to add another 500 bopd to production when it comes online. It is located southwest of the prolific Bunian 3 well which has recovered over 1.2 million barrels of oil to date. Further information regarding the well will be released pre-spud. Bass Managing Director, Tino Guglielmo, commented: “We have been eagerly awaiting the approval to drill this well as it is expected to materially boost oil production, this, at a time of elevated oil prices. The well is expected online by mid-year as the flowline to site has already been installed and tested.” Figure 1: Bunian 6 Well pad For further information please contact: Tino Guglielmo Managing Director Bass Oil Limited Ph: +61 3 9927 3000 Email: tino.guglielmo@bassoil.com.au