Announcement PDF Doc 1413687547.1 Form 604 Corporations Act 2001 Section 671B Notice of change of interests of substantial holder To Company Name/Scheme Gold Hydrogen Limited ACN/ARSN ACN 647 468 899 1. Details of substantial shareholder (1) Name Michelle Simonds (and the entity listed below) ACN/ARSN (if applicable) There was a change in the interests of the substantial holder on 31 March 2026 The previous notice was given to the company on 20 February 2026 The previous notice was dated 20 February 2026 2. Previous and present voting power The total number of votes attached to all the voting shares in the company or voting interests in the scheme that the substantial holder or an associate (2) had a relevant interest (3) in when last required, and when now required, to give a substantial holding notice to the company or scheme, are as follows: Class of securities (4) Previous notice Present notice Person’s votes Voting power (5) Person’s votes Voting power (5) Fully paid ordinary shares 25,088,798 13.90% 21,993,218 12.19% 3. Changes in relevant interests Particulars of each change in, or change in the nature of, a relevant interest of the substantial holder or an associate in voting securities of the company scheme, since the substantial holder was last required to give a substantial holding notice to the company or scheme are as follows: Date of change Person whose relevant interest changed Nature of change (6) Consideration given in relation to change (7) Class and number of securities affected Person’s votes affected 27/02/2026 CELM Investments Pty Ltd ACN 609 580 332 as trustee for the Michelle Simonds Family Trust Disposal of Shares $73,217.42 207,709 Ordinary Shares 207,709 02/03/2026 CELM Investments Pty Ltd ACN 609 580 332 as trustee for the Michelle Simonds Family Trust Disposal of Shares $187.95 537 Ordinary Shares 537 03/03/2026 CELM Investments Pty Ltd ACN 609 580 332 as trustee for the Michelle Simonds Family Trust Disposal of Shares $44,982.48 130,384 Ordinary Shares 130,384 09/03/2026 CELM Investments Pty Ltd ACN 609 580 332 as trustee for the Michelle Simonds Family Trust Disposal of Shares $26,496.90 77,138 Ordinary Shares 77,138 10/03/2026 CELM Investments Pty Ltd ACN 609 580 332 as trustee for the Michelle Simonds Family Trust Disposal of Shares $25,840.00 76,000 Ordinary Shares 76,000 Doc 1413687547.1 16/03/2026 CELM Investments Pty Ltd ACN 609 580 332 as trustee for the Michelle Simonds Family Trust Disposal of Shares $65,633.09 185,719 Ordinary Shares 185,719 23/03/2026 CELM Investments Pty Ltd ACN 609 580 332 as trustee for the Michelle Simonds Family Trust Disposal of Shares $129,108.00 435,000 Ordinary Shares 435,000 24/03/2026 CELM Investments Pty Ltd ACN 609 580 332 as trustee for the Michelle Simonds Family Trust Disposal of Shares $30,364.50 93,000 Ordinary Shares 93,000 25/03/2026 CELM Investments Pty Ltd ACN 609 580 332 as trustee for the Michelle Simonds Family Trust Disposal of Shares $171,511.20 498,000 Ordinary Shares 498,000 26/03/2026 CELM Investments Pty Ltd ACN 609 580 332 as trustee for the Michelle Simonds Family Trust Disposal of Shares $23,457.00 70,000 Ordinary Shares 70,000 31/03/2026 CELM Investments Pty Ltd ACN 609 580 332 as trustee for the Michelle Simonds Family Trust Disposal of Shares $192,300.00 500,000 Ordinary Shares 500,000 31/03/2026 CELM Investments Pty Ltd ACN 609 580 332 as trustee for the Michelle Simonds Family Trust Disposal of Shares $23,595.34 62,093 Ordinary Shares 62,093 01/04/2026 CELM Investments Pty Ltd ACN 609 580 332 as trustee for the Michelle Simonds Family Trust Disposal of Shares $291,004.00 760,000 Ordinary Shares 760,000 4. Present relevant interests Particulars of each relevant interest of the substantial shareholder in voting securities after the change are as follows: Holder of relevant interest Registered holder of securities Person entitled to be registered as holder (8) Nature of relevant interest (6) Class and number of securities Person’s votes CELM Investments Pty Ltd as trustee for the Michelle Simonds Family Trust CELM Investments Pty Ltd as trustee for the Michelle Simonds Family Trust CELM Investments Pty Ltd as trustee for the Michelle Simonds Family Trust Relevant interest arises under section 608(1)(a) of the Corporations Act 2001 (Cth) as the holder of the securities 21,993,218 12.19% Michelle Simonds CELM Investments Pty Ltd as trustee for the Michelle Simonds Family Trust CELM Investments Pty Ltd as trustee for the Michelle Simonds Family Trust Relevant interest arises under section 608(3)(b) of the Corporations Act 2001 (Cth) as a result of having control of CELM Investments Pty Ltd 21,993,218 12.19% 5. Changes in association The persons who have become associates (2) of, ceased to be associates of, or have changed the nature of their association (9) with, the substantial holder in relation to voting interests in the company or scheme are as follows: Name and ACN/ARSN (if applicable) Nature of association 6. Addresses The addresses of persons named in this form are as follows: Name Address CELM Investments Pty Ltd as trustee for the Michelle Simonds Family Trust C/- Andresen McCarthy Partners Pty Ltd 714 Main Road, Eltham VIC 3095 Michelle Simonds C/- Andresen McCarthy Partners Pty Ltd 714 Main Road, Eltham VIC 3095 Doc 1413687547.1 Signature print name Michelle Simonds capacity Director sign here date 2 April 2026 DIRECTIONS (1) If there are a number of substantial holders with similar or related relevant interests (eg. a corporation and its related corporations, or the manager and trustee of an equity trust), the names could be included in an annexure to the form. If the relevant interests of a group of persons are essentially similar, they may be referred to throughout the form as a specifically named group if the membership of each group, with the names and addresses of members is clearly set out in paragraph 6 of the form. (2) See the definition of “associate” in section 9 of the Corporations Act 2001. (3) See the definition of “relevant interest” in sections 608 and 671B(7) of the Corporations Act 2001. (4) The voting shares of a company constitute one class unless divided into separate classes. (5) The person’s votes divided by the total votes in the body corporate or scheme multiplied by 100. (6) Include details of: (a) any relevant agreement or other circumstances because of which the change in relevant interest occurred. If subsection 671B(4) applies, a copy of any document setting out the terms of any relevant agreement, and a statement by the person giving full and accurate details of any contract, scheme or arrangement, must accompany this form, together with a written statement certifying this contract, scheme or arrangement; and (b) any qualification of the power of a person to exercise, control the exercise of, or influence the exercise of, the voting powers or disposal of the securities to which the relevant interest relates (indicating clearly the particular securities to which the qualification applies). See the definition of "relevant agreement" in section 9 of the Corporations Act 2001. (7) Details of the consideration must include any and all benefits, money and other, that any person from whom a relevant interest was acquired has, or may, become entitled to receive in relation to that acquisition. Details must be included even if the benefit is conditional on the happening or not of a contingency. Details must be included of any benefit paid on behalf of the substantial holder or its associate in relation to acquisitions, even if they are not paid directly to the person from whom the relevant interest was acquired. (8) If the substantial holder is unable to determine the identity of the person (eg. if the relevant interest arises because of an option) write “unknown”. (9) Give details, if appropriate, of the present association and any change in that association since the last substantial holding notice.