Transatlantic Mining Corp. has returned surface grab sample results from a reconnaissance program at its Golden Jubilee project in Granite County, Montana, confirming three geophysical offsets.

The Golden Jubilee property consists of 22 claims. In 2014, a bulk sample of 10,000 tonnes at 9 g/t gold was trial mined and processed through two toll treating facilities.

Transatlantic has planned a 1,600-metre drilling program comprising four holes. Two holes will target the down-dip extension to a depth of 400 metres, while two holes will test the newly identified lateral offset extension to the same depth. The company is currently reviewing drill contractors to execute the program.

Mine dewatering is also underway at the site, with pipes recently laid and a generator purchased following a regulatory extension granted on March 16, 2026, which allows for new drilling and dewatering through to December 1, 2026. Work on a maiden Mineral Resource Estimate continues, with the estimate anticipated next quarter or by year-end.

“The samples further ‘ground-truthed’ the potential of additional mineralization which we plan to confirm further through a planned follow-up drill program,” said Transatlantic CEO, Bernie Sostak. “The geophysical offset has the potential to more than double the length of known strike, as well as potential parallel mineralized zones at Golden Jubilee, not to forget deepening the mineral resource target area.”

— Bernie Sostak, CEO

Elsewhere in the surrounding district, exploration activity continues to advance, including an intersection of 46.8 metres at 5.5 g/t gold reported by Sentinel Metals Limited at its Columbia gold project in August 2026.

Read the full announcement: Transatlantic Provides an Exploration Update for Its Golden Jubilee Project in Montana