Announcement PDF 603 page 1/2 15 July 2018 Form 603 Corporations Act 2001 Section 671B Notice of initial substantial holder To Company/registered scheme/notified foreign passport fund name WEST COAST SILVER LIMITED ACN/ARSN/APFRN NFPFRN (if applicable) ACN 155 472 834 1. Details of substantial holder (1) Name ACN/ARSN/APFRN (if applicable) ALIEN METALS AUSTRALIA PTY LIMITED Type ACNtext 654here 800 932 NFPFRN (if applicable) The holder became a substantial holder on 21 / 5 / 2025 2. Details of voting power The total number of votes attached to all the voting shares or interests in the company, scheme or fund that the substantial holder or an associate (2) had a relevant interest (3) in on the date the substantial holder became a substantial holder are as follows: Class of securities (4) Number of securities Person's votes (5) Voting power (6) ORDINARY SHARES 44,500,000 44,500,000 17.38% 3. Details of relevant interests The nature of the relevant interest the substantial holder or an associate had in the following voting securities on the date the substantial holder became a substantial holder are as follows: Holder of relevant interest Nature of relevant interest (7) ALIEN METALS AUSTRALIA PTY LTD BENEFICIAL Class and number of securities ORDINARY SHARES 44,500,000 4. Details of present registered holders The persons registered as holders of the securities referred to in paragraph 3 above are as follows: Holder of relevant interest Registered holder of securities ALIEN METALS AUSTRALIA PTY LTD Person entitled to be registered as holder (8) Class and number of securities ORDINARY SHARES ALIEN METALS AUSTRALIA PTY LTD 44,500,000 5. Consideration The consideration paid for each relevant interest referred to in paragraph 3 above, and acquired in the four months prior to the day that the substantial holder became a substantial holder is as follows: Holder of relevant interest Date of acquisition Consideration (9) Cash ALIEN METALS AUSTRALIA PTY LTD 21/5/2025 Non-cash Class and number of securities Non Cash 44,500,000 ordinary shares 603 page 2/2 15 July 2018 6. Associates The reasons the persons named in paragraph 3 above are associates of the substantial holder are as follows: Name and ACN/ARSN/APFRN (if applicable) and NFPFRN (if applicable) Nature of association N/A 7. Addresses The addresses of persons named in this form are as follows: Name Address Alien Metals Australia Pty Ltd Level 2 10 Ord Street West Perth WA 6005 Signature print name Guy Robertson sign here capacity date Director 30 / 5 / 2025 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 7of 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 total number of votes attached to all the voting shares or interests in the company, scheme or fund (if any) that the person or an associate has a relevant interest in. (6) The person's votes divided by the total votes in the body corporate, scheme or fund multiplied by 100. (7) Include details of: (a) any relevant agreement or other circumstances by which the relevant interest was acquired. 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. (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) Details of the consideration must include any and all benefits, money and otherwise, 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 the acquisitions, even if they are not paid directly to the person from whom the relevant interest was acquired.