Vancouver, British Columbia--(Newsfile Corp. - April 1, 2026) - Transatlantic Mining Corp. (TSXV: TCO) (the "Company") is pleased to announce that the US Department of Agriculture has extended and approved the Plan of Operation of the Golden Jubilee project located in Granite County, Montana.

Drilling at Golden Jubilee previously disclosed Sept 8, 2025, was postponed due to oncoming winter weather conditions. Drill contractors were unable to safely mobilize before the interim permit terminated December 1, 2025. The extension of approval, granted March 16, allows for new drilling and dewatering at the Golden Jubilee mine approved to December 31, 2026.

The 2026 follow-up program will further test the down dip extension and plunge of the main zone of mineralization. It will also test a geophysical offset target that has not been drilled before. Additionally the permit allows for Transatlantic to dewater the mine and survey it for further exploration potential. The current plan envisages for Transatlantic to drill up to 1,000 metres in 2 to 4 holes to moderately shallow depths of 300 metres.

"After the last successful program in 2023, we're excited to test further the down dip and plunge of this main zone of high-grade gold mineralization " said Bernie Sostak, CEO of Transatlantic. "There is also the potential to test the geophysical offset as a discovery which would more than double the length of known strike , as well as any parallel mineralized zones at Golden Jubilee. This could have significant impact on the overall gold bearing potential and future gold endowment."

Highlights from the News Release - April 13, 2023 program:

• Drillhole # 2201 - 9.1 metres at 7.8 g/t Au from 64 metres depth (8.0 m true width) (Including 1.5 metres at 16.11 g/t Au) 6.1 metres at 6.86 g/t Au from 86.9 metres depth ( 5.5 m true width)

• Drillhole # 2203 - 6.1 metres at 13.1 g/t Au from 111.3 metres depth (6.0 m true width) (Including 3.0 metres at 17.3 g/t Au)
  
  The following long section (Figure 1) illustrates the 2023 intersections juxtaposed against existing drill results as well as the processing results from earlier mining campaigns undertaken at the Golden Jubilee Mine.

Figure 1: Long Section looking Northwest on Golden Jubilee Structure

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/4652/290838_d0cdff2a649b8be3_001full.jpg

About Golden Jubilee

The 22 Golden Jubilee claims are situated in Granite County, Montana USA and have had a number of previous owners. There has been only limited exploration and mining on the regional Red Lion (vein) Line trend, which is known to continue over a regional strike of 7 km in length. The Golden Jubilee Mine is located in mountainous country at an elevation of approximately 2,350 m.

Historical Production

Although some mining occurred prior to the year 2000, there are limited production records in existence.

Review by Qualified Person (Note Table 1)

Aslam Awan PhD MAusIMM (CP Geo) is the Qualified Person pursuant to National Instrument 43-101 for having reviewed, only the technical information and approved as such contained in this news release. Mr. Awan is the Principal for AAA GeoConsultants :

(*)The reverse circulation drill samples were crushed in whole to plus 70 % passing 2 mm and then split and pulverised with analysis for gold and silver at the Christofferson Laboratory, Smelterville, Idaho USA. The Laboratory is an independent assay and umpire laboratory that follows industry techniques with blanks and standards inserted on batches of 25. The samples being pulverised and analysed with a 15 to 30 gram fire assay charge and a gravimetric finish. True widths were estimated based on the dip cross section width of the mineralisation at 1.0 g/t Au cutoff ( Table 1). Additional historical holes drilled and assayed are also on Figure 1. The Company also adds a standard to determine any assay bias.

About Transatlantic Mining Corp.

Transatlantic Mining (TSXV: TCO) is an emerging precious and base metal explorer. The Company has a focus on converting projects into mines within stable mining jurisdictions. The Company currently has property interests including an 80% Joint Venture position on the Monitor Copper-Gold project in Montana-Idaho (USA) and 100 % of the Golden Jubilee Gold Project with its associated mining rights. The Company has an extended lease, right to mine and purchase arrangement for the Miller Gold Mine in Montana to 100% ownership by way of payment royalty.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release

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