Announcement PDF Gold Hydrogen Limited, Level 14, 110 Eagle Street (GPO Box 801) Brisbane, Qld 4000 | info@goldhydrogen.com.au | ABN 74 647 468 899 | 1 14 September 2026 ASX Announcement Interim Ramsay 3 Flow Testing Update – Strong Reservoir Deliverability HIGHLIGHTS Ø Initial flow testing of Ramsay 3 has commenced, with early results demonstrating exceptional reservoir deliverability. Ø Ramsay 3 has recorded an exceptionally high Productivity Index (PI) of approximately 40 bbl/day/psi, in- dicating very strong reservoir inflow and permeability. Ø Early testing achieved flow rates exceeding 8,000 bbl/day using the Electric Submersible Pump (ESP), with only limited pressure drawdown, indicating significant additional well deliverability and supporting the potential for flow rates exceeding 20,000 bbl/day under optimised operating conditions. Ø The approximately 40 bbl/day/psi PI is the highest recorded at the Ramsay Project to date, compared with approximately 34 bbl/day/psi derived from Ramsay 1 and Ramsay 2, and significantly above the <2 bbl/day/psi typically associated with low-permeability reservoirs. Ø Testing indicates that the 105 metre perforated interval, selected from the 180 metre gross Helium-bearing Kulpara Dolomite interval using NMR log data, is making a strong contribution to aggregate well flow. Ø Initial shut-in pressure build-up data showed negligible pressure depletion, providing encouraging early evidence of substantial reservoir support and potentially a significantly larger connected gas volume. Ø Preliminary analysis indicates a Ramsay 3 drainage radius of approximately 1.25 km, demonstrating the potential for extensive reservoir connectivity and a substantial area of reservoir influence. Ø The results provide strong early confirmation that the larger 7-inch cased, cemented and perforated Ram- say 3 well design is performing as intended and is capable of delivering substantially increased inflow ca- pacity. Ø The Ramsay 3 flow-testing program is currently undertaking an extended wellbore clean-up phase ahead of the main stabilised flow operation. Ø The main Helium flow-testing program is expected to commence later this week following mobilisation of additional equipment to assist with wellbore clean-up and optimisation. Ø Testing of the Natural Hydrogen-bearing zones will follow completion of the Helium zone testing. Gold Hydrogen Limited, Level 14, 110 Eagle Street (GPO Box 801) Brisbane, Qld 4000 | info@goldhydrogen.com.au | ABN 74 647 468 899 | 2 RAMSAY 3 TESTING PROGRAM UNDERWAY Further to the Company’s previous update of 2 September 2026, the Directors of Gold Hydrogen Limited (Gold Hydrogen, ASX: GHY, the Company) are pleased to provide an interim operational update on the flow testing program underway at the Ramsay 3 well, Ramsay Project (PEL 687), Yorke Peninsula, South Australia. Following completion of workover operations and perforation of the selected Helium-bearing intervals, initial well performance data acquired prior to the commencement of the main flow program has derived a Productivity Index of approximately 40 bbl/day/psi – the highest derived at the Ramsay Project to date. This early outcome provides the Company with confidence that the 7-inch cased, cemented and perforated wellbore design at Ramsay 3 is performing as intended. The larger-diameter completion provides approximately 2.3 times the wellbore cross-sectional area of the 4½-inch cased Ramsay 1 and Ramsay 2 wells and supports the substantially larger-capacity Electrical Submersible Pump (ESP) of up to or more than 20,000 bbl/day. The program is currently undertaking an extended wellbore clean-up phase to recover workover and completion fluids from the wellbore and near-wellbore region ahead of stabilised flow and representative gas sampling. Clean-up is progressing and the main Helium flow program is expected to commence later this week. The figures stated in this announcement are preliminary field-derived measurements and remain subject to confirmation. Gold Hydrogen will provide further updates to the market as the Ramsay 3 flow testing program continues. Important Risk Commentary It is important to note that there remain both geological and potential development risks associated with the Ramsay Project and the Company’s commercial and business objectives. Exploratory flow testing of the Kulpara Dolomite interval may not result in a flow of Helium to surface. There is no certainty that the Ramsay 3 testing program will achieve the expected outcomes, that Contingent Resources will be able to be booked, that an accelerated FEED or a Ramsay development will proceed, or that commercial viability can be established. Gold Hydrogen Limited, Level 14, 110 Eagle Street (GPO Box 801) Brisbane, Qld 4000 | info@goldhydrogen.com.au | ABN 74 647 468 899 | 3 Further Information Further information on the Gold Hydrogen group, its projects, and its Board and Management can be found on the Company’s website ( www.goldhydrogen.com.au ). Gold Hydrogen also has accounts on LinkedIn and Twitter (@GHY_ASX), and copies of market releases will be emailed to all interested parties who register via investorhub.goldhydrogen.com.au/auth/signup. This announcement has been authorised for release by the Managing Director. On behalf of the Board Karl Schlobohm Company Secretary For Company Enquiries Contact: Neil McDonald – Managing Director Karl Schlobohm – Company Secretary / CFO nmcdonald@goldhydrogen.com.au kschlobohm@goldhydrogen.com.au +61 7 3521 8038 +61 7 3521 8038 For Media Enquiries Contact: Matthew Doman – Crestview Strategy matthew.doman@crestviewstrategy.com +61 421 888 858 Forward Looking Statement / Future Performance This announcement may contain certain forward-looking statements and opinion. Forward-looking statements, including aspirational forward-plans, projections, forecasts and estimates, are provided as a general guide only and should not be relied on as an indication or guarantee of future performance and involve known and unknown risks, uncertainties, assumptions, contingencies and other important factors, many of which are outside the control of the Company and which are subject to change without notice and could cause the actual results, performance or achievements of the Company to be materially different from the future results, performance or achievements expressed or implied by such statements. Past performance is not necessarily a guide to future performance and no representation or warranty is made as to the likelihood of achievement or reasonableness of any forward-looking statements or other forecast. Nothing contained in this announcement, nor any information made available to you is, or and shall be relied upon as, a promise, representation, warranty or guarantee as to the past, present or the future performance of Gold Hydrogen Limited. Gold Hydrogen Limited, Level 14, 110 Eagle Street (GPO Box 801) Brisbane, Qld 4000 | info@goldhydrogen.com.au | ABN 74 647 468 899 | 4 Table 1 – Ramsay 3 Interim Flow Test Results (wellbore clean up phase only) Name of well: Ramsay 3 Location (UTM zone 53 GDA2020) UTM zone 53 GDA2020: X 749096 mE / Y 6151186 mN Permit PEL 687 Entity’s working interest Gold Hydrogen 100% Resources Helium Formation Test 1: Kulpara Dolomite (primary Helium target zone) Gross thickness and net pay thickness 180m gross primary target zone for flow testing. Perforation interval of 105m in Kulpara dolomite. Insufficient information is presently available to determine net pay thickness. Geological rock type Kulpara Dolomite Depth of the zones tested Perforated intervals between 500m to 800m depth Type of test and duration Zonal Electrical Submersible Pump (ESP) flow test across the Kulpara Dolomite on 10 September 2026 (wellbore cleanup phase only) Phase recovered Gas, water Corrected He concentration in gas recovered during flow test (Other recovery and proportions) Wellbore clean up phase only - Insufficient information is presently available to determine concentrations Flow rates, choke size, volumes recovered Gross fluid rate of more than 8,000 bbl/day (during wellbore cleanup phase) - Insufficient information is presently available to determine final flow rates Fracture stimulation N/A Material non hydrocarbons Helium, Nitrogen, CO2 Information compiled by Billy Hadi-Subrata, Gold Hydrogen’s Chief Technical Officer.