Announcement PDF 603 GUIDE page 1/2 28th May 2025 Form 603 Corporations Act 2001 Section 671B Notice of initial substantial holder To: Company Name/Scheme WEST COAST SILVER LIMITED ACN/ARSN 95 155 472 834 1. Details of substantial holder (1) Name Mr Jason Peterson ACN/ARSN (if applicable) N/A The holder became a substantial holder on 28 / 05 / 2025 2. Details of 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 on the date the substantial holder became a substantial holder are as follows: Class of securities (4) Ordinary fully paid (O.F.P.) Number of securities Person’s votes (5) Voting power (6) 17,017,459 17,017,459 6.54% 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 Class and number of securities Nature of relevant interest (7) Fat Hog Pty Ltd Fat Hog Pty Ltd 1,111,112 Sunset Capital Management Pty Ltd <Sunset Superfund A/C> Sunset Capital Management Pty Ltd <Sunset Superfund A/C> 690,711 Celtic Capital Pty Ltd <Celtic Capital No 2 A/C> Celtic Capital Pty Ltd <Celtic Capital No 2 A/C> 525,902 Celtic Finance Corp Pty Ltd Celtic Finance Corp Pty Ltd 11,111,111 Celtic Finance Corp Pty Ltd <Income A/C> Celtic Finance Corp Pty Ltd <Income A/C> 2,335,197 CPS Capital No 5 Pty Ltd CPS Capital No 5 Pty Ltd 1,243,426 4. Details of present registered holders The persons registered as holders of the securities referred to in paragraph 3 above are as follows: Holders of relevant interest Registered holder of Securities Person entitled to be registered as a holder (8) Class and number of securities Fat Hog Pty Ltd Fat Hog Pty Ltd Fat Hog Pty Ltd 1,111,112 Sunset Capital Management Pty Ltd <Sunset Superfund A/C> Celtic Capital Pty Ltd <Celtic Capital No 2 A/C> Sunset Capital Management Pty Ltd <Sunset Superfund A/C> Celtic Capital Pty Ltd <Celtic Capital No 2 A/C> Sunset Capital Management Pty Ltd <Sunset Superfund A/C> Celtic Capital Pty Ltd <Celtic Capital No 2 A/C> 690,711 Celtic Finance Corp Pty Ltd Celtic Finance Corp Pty Ltd Celtic Finance Corp Pty Ltd 11,111,111 Celtic Finance Corp Pty Ltd <Income A/C> Celtic Finance Corp Pty Ltd <Income A/C> Celtic Finance Corp Pty Ltd <Income A/C> 2,335,197 CPS Capital No 5 Pty Ltd CPS Capital No 5 Pty Ltd CPS Capital No 5 Pty Ltd 1,243,426 525,902 5. Consideration The consideration paid for each relevant interest referred to in paragraph 3 above, and acquired in the four month s prior to the day that the substantial holder became a substantial holder is as follows: Holder of relevant interest Date of acquisition Consideration (9) Fat Hog Pty Ltd 21/05/2025 $23,547.56 Fat Hog Pty Ltd 01/04/2025 $6,452.46 Cash Class and number of securities Noncash 872,132 238,980 603 GUIDE page 2/2 Sunset Capital Management Pty Ltd <Sunset Superfund A/C> 21/05/2025 $7,849.20 290,711 Celtic Capital Pty Ltd <Celtic Capital No 2 A/C> 21/05/2025 $19,622.63 726,764 Celtic Capital Pty Ltd <Celtic Capital No 2 A/C> 01/04/2025 $5,376.73 199,138 Celtic Finance Corp Pty Ltd 28/05/2025 $300,000 11,111,111 Celtic Finance Corp Pty Ltd <Income A/C> 28/05/2025 $63,050.32 2,335,197 CPS Capital No 5 Pty Ltd 28/05/2025 $33,572.50 1,243,426 6. Associates The reasons the person named in paragraph 3 above and associates of the substantial holder are as follows: Name and ACN/ARSN (if applicable) Nature of association Fat Hog Pty Ltd Sunset Capital Management Pty Ltd <Sunset Superfund A/C> Celtic Capital Pty Ltd <Celtic Capital No 2 A/C> Celtic Finance Corp Pty Ltd Celtic Finance Corp Pty Ltd <Income A/C> CPS Capital No 5 Pty Ltd Director Trustee/Director Director Director Director Director 7. Addresses The addresses of persons named in this form are as follows: Name Address Fat Hog Pty Ltd Sunset Capital Management Pty Ltd <Sunset Superfund A/C> Celtic Capital Pty Ltd <Celtic Capital No 2 A/C> Celtic Finance Corp Pty Ltd Celtic Finance Corp Pty Ltd <Income A/C> CPS Capital No 5 Pty Ltd C/- PO Box Z5467, Perth St Georges Terrace, Perth WA 6831 C/- PO Box Z5467, Perth St Georges Terrace, Perth WA 6831 C/- PO Box Z5467, Perth St Georges Terrace, Perth WA 6831 C/- PO Box Z5467, Perth St Georges Terrace, Perth WA 6831 C/- PO Box Z5467, Perth St Georges Terrace, Perth WA 6831 C/- PO Box Z5467, Perth St Georges Terrace, Perth WA 6831 Signature print name sign here Mr Jason Peterson capacity Director date 28 / 05 / 2025 28th May 2025