BISON RESOURCES LIMITED — Board/Management Information 2026

Jun 2, 2026

ASX Announcement

BISON RESOURCES

ASX: BSR

2 June 2026

TIM MACKELLAR APPOINTED CEO OF BISON RESOURCES

Bison Resources Limited (ASX: BSR) announces the appointment of Tim Mackellar as Chief Executive Officer

Highlights

• Bison Resources strengthens executive leadership with appointment of new Chief Executive Officer
• Experienced mining professional to lead Bison’s next phase of growth and exploration
• Tim Mackellar, incoming CEO, brings a strong senior commercial track record within tier 1 mining companies, including Rio Tinto and Fortescue
• Proven capital markets experience spanning IPOs, equity raisings and corporate governance across the mining, resources and technology sectors

Bison Resources Limited (ASX Code: “BSR”) (“Bison Resources” or “the Company”) is pleased to announce the appointment of Tim Mackellar as Chief Executive Officer, effective 2 June 2026.

Tim Mackellar is an experienced mining and resources professional with deep expertise in commercial strategy and execution of large-scale resource developments, spanning the full project lifecycle from concept and construction through to steady state operations across domestic and international jurisdictions.

Tim has held senior commercial roles with leading global mining companies Rio Tinto and Fortescue, where he led and executed complex project agreements and transactions across multi-billion-dollar resource developments including Robe Valley, Winu and Kangwinan.

His professional background also encompasses corporate and capital markets law, having practised at Steinepreis Paganin advising ASX-listed and emerging companies across the mining, resources and technology sectors on IPOs, equity raisings, corporate governance and listed-company transactions.

Bison Resources Non-Executive Chair, Adam Jakovich said:

“We are delighted to welcome Tim to Bison Resources at such an important juncture for the Company. His exceptional track record in delivering complex resource developments, combined with deep commercial and

Bison Resources Limited

1/1 Tully Road, East Perth

Western Australia 6004

bisonresources.com.au

info@bisonresources.com.au

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BISON RESOURCES

capital markets expertise, makes Tim ideally placed to drive our strategy forward. The Board is confident that Tim's leadership will create significant value for our shareholders as we advance our projects through the next stage of exploration and development."

The key terms of Mr Mackellar's appointment as CEO are detailed within Appendix 1 below.

This announcement is authorised for release by the Board of Bison Resources Limited.

ENDS

For more information:

Investors:
Adam Jakovich
Non-Executive Chair
Bison Resources
E: info@bisonresources.com.au

Media:
Nicholas Read
Read Corporate
Phone: +61 419 929 046
E: nicholas@readcorporate.com.au

Bison Resources Limited
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BISON RESOURCES

APPENDIX 1

The key terms of Mr Mackellar's appointment as CEO are summarised below:

• Position: Chief Executive Officer
• Commencement Date: 2 June 2026
• Term: No fixed term
• Remuneration: $250,000 per annum (exclusive of superannuation)
• Incentives: See below
• Termination and notice period: 3 months

The Company has agreed to issue the following incentives under the Company's Employee Securities Incentive Plan to Mr Mackellar.

Tranche	Number of Performance Rights	Vesting Conditions	Expiry Date
Tranche 1	250,000	Subject to ongoing employment or engagement with the Company, both of the following:
(a) 12 months of continuous services as an Executive; and
(b) the Company announcing completion of a drill program of not less than 5,000 meters	5 years from date of issue
Tranche 2	250,000	Subject to ongoing employment or engagement with the Company, the Company announcing confirmation, through independently verified assay results, of rock chip samples returning grades above a specified threshold 1% Cu or 5g/t Au or 50g/t Ag, from any of the company's projects.	5 years from date of issue
Tranche 3	500,000	Subject to ongoing employment or engagement with the Company, the volume weighted average price of the Company's Shares over a period of 20 consecutive trading days, on which shares have traded, (20-day VWAP) being equal or greater than $0.60 from the Commencement Date	5 years from date of issue
Tranche 4	250,000	Subject to ongoing employment or engagement with the Company, the Company announcing a drill intercept of equal to or greater than 15m with a grade equal to or higher than 5g/t Au or 50g/t Ag or 1% Cu	5 years from date of issue

Bison Resources Limited