Nuvau intercepts 17.37 g/t Au over 2.40 m at Thundermine

New assays continue to demonstrate continuity of the mineralized system

Toronto, Ontario--(Newsfile Corp. - September 17, 2026) - Nuvau Minerals Inc. (TSXV: NMC) is pleased to report additional assay results from its 2026 summer drilling program at Thundermine (also called Thunderwood) in Matagami, Québec. Hole TH-26-11, located approximately 50 metres shallower than TH-26-08, intersected 17.37 g/t gold (Au) over 2.40 metres within a broad mineralized interval. The new intersection provides an additional pierce point between TH-26-08 and historical drilling, further supporting continuity of the mineralized system.

Highlights of drill results:

17.37 g/t Au over 2.40 metres in TH-26-11, within a broader 165-metre interval averaging 0.37 g/t Au characterized by variable densities of mineralized veins.

TH-26-11 is located approximately 50 metres shallower than TH-26-08, which intersected 138.9 g/t Au over 4.4 metres, and halfway toward historical drilling, adding another mineralized pierce point to the system.

Every Nuvau summer drillhole assayed to date has returned gold mineralization, with six additional holes pending and the system remaining open.

"TH-26-11 is a 50-metre step-out from TH-26-08 and demonstrates continuity of the system," said Christina McCarthy, Nuvau's Chief Executive Officer. "The hole returned 17.37 g/t Au over 2.40 metres within a 165-metre mineralized interval, in the same altered tonalitic host and quartz-tourmaline vein array intersected throughout the program. Remember, this Thundermine property has not been systematically tested for over 40 years, and orogenic systems of this style in the Abitibi are known for their significant vertical persistence. Thundermine remains open along the interpreted trend to the southeast, as shown in our previously announced diagrams 1 , and at depth, with assays from six holes still