EasternGas.com.au | 119 Willoughby Road Crows Nest NSW 2067 EASTERN GAS CORPORATION LIMITED ABN 71 692 331 838 Appointment of Company Secretary Sydney, 13 March 2026: East Coast Gas Developer, Eastern Gas Corporation Limited (ASX: EGA) (“Eastern Gas” or “the Company”) advises that Mr Adam Gallagher has been appointed as company secretary effective today. Mr Gallagher is a highly experienced company secretary and has been a Chartered Secretary since 2012. He holds Graduate Diplomas in Governance and Information Systems, a Master of Commerce and a Bachelor of Economics. Mr Gallagher replaces Mr Karl Schlobohm, who steps down as Company Secretary effective today. For the purposes of ASX Listing Rule 12.6, Mr Gallagher will be the person responsible for communications between the Company and ASX. This ASX Announcement has been authorised for release by the Board. For further information, please contact: David Spring Managing Director Email: investor@easterngas.com.au About Eastern Gas Corporation Limited Eastern Gas is a natural gas exploration company that was formed with a mission to provide Australians with energy security and a reliable source of power. The Company’s east coast natural gas portfolio features two highly prospective tenements in Queensland’s prolific Cooper Basin and Surat Basin – Walloon CSG fairway. With a natural gas shortage and energy crisis around the world, we believe LNG will play a critical role in fuelling the transition to a carbon-free economy in the long term. Website: www.easterngas.com.au ASX Announcement EasternGas.com.au | 119 Willoughby Road Crows Nest NSW 2067 EASTERN GAS CORPORATION LIMITED ABN 71 692 331 838 Forward-Looking Statements This announcement contains forward-looking statements. Forward-looking statements are not historical facts and may be identified by the use of terminology such as “may”, “will”, “expect”, “intend”, “plan”, “estimate”, “anticipate”, “continue”, “outlook”, “guidance” and other similar expressions. These forward-looking statements include, but are not limited to, statements regarding the plans, strategies and objectives of management, anticipated production or construction commencement dates, expected costs, resources and reserves, exploration results, production outputs and other statements regarding future events or performance. Forward-looking statements are based on Eastern Gas’ current expectations, estimates and assumptions and are subject to known and unknown risks, uncertainties and other factors that may cause actual results, performance or achievements to differ materially from those expressed or implied in such statements. These risks include, without limitation, commodity price fluctuations, demand variability, currency movements, drilling and production outcomes, resource and reserve estimation risk, competition, environmental and operational risks, legislative, fiscal and regulatory changes, economic and financial market conditions, political risk, project timing variations, approvals and cost variations. No assurance can be given that the forward-looking statements will prove to be correct. Readers should not place undue reliance on forward-looking statements. Disclaimer To the maximum extent permitted by law, Eastern Gas and its respective related bodies corporate, affiliates, directors, officers, employees, agents and advisers make no representation or warranty, express or implied, as to the accuracy, reliability, completeness or fairness of the information contained in this announcement, nor do they accept any responsibility or liability for any loss or damage arising from reliance on this information. The information in this announcement is provided as at the date of this document. Except as required by law or applicable regulation (including the ASX Listing Rules), Eastern Gas undertakes no obligation to update or revise any forward-looking statements or other information contained in this announcement, whether as a result of new information, future events or otherwise.