ASX Announcement Release date: 19 June 2025 Top 20 Option Holders and Distribution Schedule Bass Oil Limited (ASX:BAS) is an Australian-listed oil producer that holds a majority interest in eight permits in the Cooper Basin including the 100% owned Worrior and Padulla oil fields and a 55% interest in a South Sumatra Basin KSO. The Company is debt free and committed to creating value by leveraging the competitive strengths of its team, operating capability, reputation, and relationships in both Australia and Indonesia. Bass Oil Limited (“BAS” or “the Company”) refers to the Appendix 2A Application for Quotation of Securities released today. Attached is further information containing the top 20 option holders and distribution schedule for the new class of quoted securities, BASO, in accordance with Listing Rule 3.10.5. The expiry date of the options will be 31 May 2028. The terms and conditions of the options were outlined in the Prospectus dated 14 May 2025, which can be found at the following link: https://www.bassoil.com.au/2025-asx-announcements. This announcement has been authorised for release to the market by the Board For further information please contact: Robyn Hamilton Company Secretary Bass Oil Limited Ph: +61 3 9927 3000 Email: robyn.hamilton@bassoil.com.au Bass Oil Limited ACN: 008 694 817 Level 5, 11-19 Bank Pl., Melbourne 3000 Victoria, Australia T + 61 3 9927 3000 F + 61 3 9614 6533 admin@bassoil.com.au www.bassoil.com.au MUFG Corporate Markets A division of MUFG Pension & Market Services PAGE NUMBER : 1 REPORT DATE : 19/06/2025 REPORT TIME : 15.20.30 BASS OIL LIMITED TOP 20 INVESTORS REPORT THURSDAY 19 JUNE 2025 Rank Investor Available Balance % Issued Capital Security: BASO - OPTIONS @ 0.05 EXP 31/05/2028 1 MILLER ANDERSON PTY LTD <LONGHORN RIDGE SUPER A/C> 2,812,500 19.46% 2 M&M DE ROSA PTY LTD <M&M DE ROSA SUPER FUND A/C> 750,000 5.19% 3 YAVERN CREEK HOLDINGS PTY LTD 741,668 5.13% 4 MR STEPHEN HENRY BELL + MRS JANE KATHLEEN BERVELING <BELL & BERVELING SUPER A/C> 537,066 3.72% 5 MR DAVID CASSIDY 468,750 3.24% 6 CITICORP NOMINEES PTY LIMITED 467,907 3.24% 7 MRS PINA MARTUCCI 410,536 2.84% 8 MR ALAN BRUCE SULLIVAN + MS ADRIENNE ELIZABETH SULLIVAN <AAJK SULLIVAN SF A/C> 375,235 2.60% 9 BNP PARIBAS NOMINEES PTY LTD <IB AU NOMS RETAILCLIENT> 325,000 2.25% 10 WINGMONT PTY LTD 307,143 2.12% 11 CHESSER NOMINEES PTY LTD 291,100 2.01% 12 MR WILLIAM CHARLES WHEELAHAN 283,334 1.96% 13 MR MARK ANDREW TKOCZ 275,000 1.90% 14 MR HECTOR GORDON 259,715 1.80% 15 MR BRUCE HAY DONALDSON + MRS CYNTHIA CAROLYN DONALDSON 250,000 1.73% Confidential MUFG Corporate Markets A division of MUFG Pension & Market Services PAGE NUMBER : 2 REPORT DATE : 19/06/2025 REPORT TIME : 15.20.30 BASS OIL LIMITED TOP 20 INVESTORS REPORT THURSDAY 19 JUNE 2025 Available Balance % Issued Capital SUPER SECRET PTY LIMITED <TKOCZ SF A/C> 250,000 1.73% 16 MR WILLIAM THOMAS SANDERS <THE WT & HM SANDERS S/F A/C> 225,000 1.56% 17 FINCLEAR SERVICES PTY LTD <SUPERHERO SECURITIES A/C> 217,901 1.51% 18 MR GUY LEON BANDUCCI 200,000 1.38% 18 MR PAUL MERLO 200,000 1.38% 19 TECHNICA PTY LTD 192,391 1.33% 20 TECHNICA PTY LTD 183,334 1.27% Rank Investor 15 TOTAL IN THIS REPORT: TOTAL OTHER INVESTORS: GRAND TOTAL: 10,023,580 4,432,360 14,455,940 end of report Confidential Investors 22 173 195 69.34% 30.66% 100.00% MUFG Corporate Markets A division of MUFG Pension & Market Services PAGE NUMBER : 1 REPORT DATE : 19/06/2025 REPORT TIME : 15.19.52 BASS OIL LIMITED INVESTOR RANGES THURSDAY 19 JUNE 2025 Ranges Investors Security Code : BASO Securities % Issued Capital OPTIONS @ 0.05 EXP 31/05/2028 Holding Type : Issuer 1 to 1000 1001 to 5000 5001 to 10000 10001 to 100000 100001 and Over Total 5 4 4 6 2 21 2,112 15,073 31,853 238,559 598,243 885,840 .02 .10 .22 1.65 4.14 6.13 17 49 21 54 33 174 6,649 140,342 163,013 1,985,569 11,274,527 13,570,100 .05 .97 1.13 13.74 77.99 93.87 Holding Type : CHESS 1 to 1000 1001 to 5000 5001 to 10000 10001 to 100000 100001 and Over Total Totals for Security Code BASO 1 to 1000 1001 to 5000 5001 to 10000 10001 to 100000 100001 and Over Total 22 53 25 60 35 195 8,761 155,415 194,866 2,224,128 11,872,770 14,455,940 .06 1.08 1.35 15.39 82.13 100.00 end of report Confidential