HYDROCARBON DYNAMICS LIMITED — Capital/Financing Update 2025

Nov 16, 2025

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17 November 2025

Expiry of Unlisted Options

Hydrocarbon Dynamics Limited (ASX: HCD) wishes to advise that the Company’s unlisted options, detailed below, expired on 15 November 2025.

Number of Options Exercise Price Expiry Date 144,763,447 $0.005 15 November 2025

Approved by the board of Directors.

Yours sincerely,

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Julie Edwards Company Secretary

For further information please contact:

Stephen Mitchell Julie Edwards Executive Chairman Company Secretary Telephone: +61 3 9642 2899 ASX Code: HCD

ABN: 75 117 387 354 Tel: +61 3 9642 2899 | Fax: +61 3 9642 5177 Level 6, 412 Collins Street, Melbourne VIC 3000 Australia