HIGHLIGHTS

• March 2025 Tolmer discovery hole ranked 5th highest-grade silver intersection reported globally during H1 2025, with an interval of 6m @ 4,747 g/t Ag from only 46m depth¹

• New assays have extended high grade silver horizons, and added coincident high-grade gold up to ~13g/t Au, within a highly mineralised footprint now ~1.5km wide²

ADELAIDE, AUSTRALIA / ACCESS Newswire / August 10, 2025 / Barton Gold Holdings Limited (ASX:BGD)(FRA:BGD3)(OTCQB:BGDFF) (Barton or Company) is pleased to confirm diamond drilling (DD) has commenced at the Tolmer prospect, located at the Company's South Australian Tarcoola Gold Project (Tarcoola). An initial program of 3 holes totalling ~550 metres drilling is planned in the ‘eastern gold zone' to investigate local structural controls and guide future targeting.

Full details are contained in the complete announcement, which can be accessed on the ASX website, the investor section of Barton's website, or directly by clicking here.

Commenting on the Tolmer diamond drilling, Barton Managing Director Alexander Scanlon said:

"Tolmer is an exciting new discovery located between our existing Central Gawler Mill and planned Tunkillia mill. With gold and silver grades up to 83.6g/t Au and 17,600g/t Ag, Tolmer has clear potential to add significant value to our regional development strategy. This diamond drilling will help improve our local structural knowledge as we work to identify the origins of such high-grade mineralisation."

¹ According to Rock Report analysis available here and at https://rockreportnews.com/graphics/; refer to ASX announcement dated 27 March 2025
² Refer to ASX announcement dated 5 August 2025

Authorised by the Managing Director of Barton Gold Holdings Limited.

For further information, please contact:

About Barton Gold
Barton Gold is an ASX, OTCQB and Frankfurt Stock Exchange listed Australian gold developer targeting future gold production of 150,000ozpa with 2.1Moz Au & 3.1Moz Ag JORC Mineral Resources (78.9Mt @ 0.85 g/t Au), brownfield mines, and 100% ownership of the region's only gold mill in the renowned Gawler Craton of South Australia. *

Challenger Gold Project 223koz Au + fully permitted Central Gawler Mill ( CGM ) Tarcoola Gold Project 20koz Au in fully permitted open pit mine near CGM Tolmer discovery grades up to 84g/t Au & 17,600g/t Ag Tunkillia Gold Project 1.6Moz Au & 3.1Moz Ag JORC Mineral Resources Competitive 120kozpa gold & 250kozpa silver project Wudinna Gold Project 279koz Au project located southeast of Tunkillia Significant optionality, adjacent to main highway

Competent Persons Statement & Previously Reported Information
The information in this announcement that relates to the historic Exploration Results and Mineral Resources as listed in the table below is based on, and fairly represents, information and supporting documentation prepared by the Competent Person whose name appears in the same row, who is an employee of or independent consultant to the Company and is a Member or Fellow of the Australasian Institute of Mining and Metallurgy (AusIMM), Australian Institute of Geoscientists (AIG) or a Recognised Professional Organisation (RPO). Each person named in the table below has sufficient experience which is relevant to the style of mineralisation and types of deposits under consideration and to the activity which he has undertaken to quality as a Competent Person as defined in the JORC Code 2012 (JORC).