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ASTRON LIMITED — Board/Management Information 2026
Jan 11, 2026
64449_rns_2026-01-11_11f3a5f5-1aa9-45d6-bfa5-fd3955f601f7.pdf
Board/Management Information
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ASX Announcement
ASX Code: ATR
12 January 2026
Appointment of Catherine Costello to the Board of Directors
Astron Limited (ASX:ATR) ( Astron ) is pleased to announce the appointment of Ms Catherine Costello as a nonexecutive director, effective immediately.
Ms Costello’s appointment will strengthen and complement Astron’s Board capabilities, and is a further step in the evolution of Astron as it prepares for the Final Investment Decision ( FID ) for the Donald Rare Earth and Mineral Sands Project ( Donald Project ).
Ms Costello brings more than 25 years of experience in Australian and multinational resource businesses, including large ASX-listed and US-listed entities, in which she has held key executive roles with responsibility for financial management, strategic development and governance. She has been closely involved in strategic decision making and transformative business processes and has led significant corporate transactions. Her board experience includes executive and non-executive director roles as well as providing independent advisory services while chairing board committees.
Ms Costello is currently employed by Ok Tedi Mining Limited as General Manager, Project Financing and Strategy. Prior to this, her role at Ok Tedi Mining was Chief Financial Officer and General Manager People and Commercial.
Ms Costello is a Chartered Accountant and Chartered Secretary. She is a graduate of both the Australian Institute of Company Directors and the Governance Institute of Australia and holds the degrees of Bachelor of Commerce and Master of Science (Mineral Economics).
Ms Costello presently serves as a non-executive director and chair of the Audit Committee of ASX-listed Horizon Oil Limited.
This announcement is authorised for release by the Managing Director of Astron Limited.
For further information, contact:
Tiger Brown Joshua Theunissen Managing Director Australian Company Secretary +61 3 5385 7088 +61 3 5385 7088 [email protected] [email protected]
About Astron
Astron Limited (ASX: ATR) is an ASX listed company, with over 35 years of experience in mineral sands processing and downstream product development, as well as the marketing and sales of zircon and titanium dioxide products. Astron’s prime focus, in association with joint venture partner, Energy Fuels Inc, is the development of its Donald Rare Earth and Mineral Sands Project in regional Victoria. The Donald Rare Earth and Mineral Sands Project has the potential to become a globally significant, long-life supplier of critical rare earth elements, including neodymium, praseodymium, dysprosium, terbium, as well as zircon and titanium minerals. In addition to its Australian assets, the Group operates a mineral sands sales and trading operations.
Contact us
Astron Limited ACN: 685 756 209
www.astronlimited.com.au [email protected]
03 5385 7088 Level 10, 224 Queen Street, Melbourne VIC 3000