Magna Mining Inc. (TSX-V: NICU) (OTCQX: MGMNF) (FSE: 8YD) is pleased to provide the results of ongoing exploration and an update on activities at the past-producing Levack Mine, located in the North Range of the Sudbury Basin, Ontario, Canada (Figure 1). Recent drilling has continued to intersect significant copper-rich massive sulphide veins with high grade precious metals within the R2 Footwall Zone. Highlights of two additional wedge holes from surface and the first underground drill hole targeting the R2 Footwall Zone are summarized below and in Table 1. Exploration of the R2 Footwall Zone continues in parallel with underground development and surface work at Levack Mine in anticipation of a restart decision in the second half of 2026 following completion of the Levack Preliminary Economic Assessment in Q3.

Highlights from the new assay results include:

Dave King, SVP Exploration and Geoscience at Magna, stated, “Exploration drilling within the R2 Footwall Zone continues to intersect and define the high grade copper massive sulphide footwall vein system, including impressive precious metals with gold values up to 44.3 g/t over 1.5 metres. To date, fourteen drillholes have targeted the R2 Footwall Zone, with all holes intersecting copper and precious metals-rich mineralization. The thicker down hole intercepts encountered in the MLV-26-14A W1-3 drillholes, including the 29.7% copper equivalent over 3.4 metres reported today, represent some of our highest grade-thickness intercepts to date. Near term drilling will focus on expanding the mineralization up-dip, with the goal of understanding the relationship of the R2 Footwall Zone with the historical No. 3 Orebody, as well as infill drilling to better understand the structural controls on vein thickness and the distribution of precious metals within the veins. We expect drilling efficiency to improve significantly over the next several weeks as additional drills are activated from new underground platforms and begin completing shorter drillholes.”

Two surface drill rigs and one underground rig are currently active at Levack, with an additional underground drill scheduled to mobilize this week, and a third underground drill to be added in July. In addition to the current drilling, underground development crews have advanced the new 2950 Level exploration drift from the Morisson Footwall Cu-PGE deposit by approximately 185 meters towards the R2 Footwall Zone and are expected to reach the initial drilling platform by the end of July (Figure 2). In addition to development on the 2950 Level, Levack Mine personnel are progressing well with rehabilitating along the 2650 Level from the No. 2 shaft towards the No. 3 shaft. The 2650 Level underground exploration diamond drilling platforms will be better positioned to define the upper R2 Footwall Zone and test additional target areas in the footwall of the No. 3 Orebody.

The vein system which defines the R2 Footwall Zone has been intersected over a vertical extent of approximately 300 metres and a north-south extent of approximately 150 metres (Figure 3). The R2 Zone remains open up dip towards the No. 3 Footwall Zone as well as at depth towards the Morrison Footwall Cu-PGE Deposit, located 600 metres to the southwest.

Diamond drillholes MLV-26-14A W2 and MLV-26-14A W3 are follow up wedge holes drilled from surface designed to test the interpreted extensional environment in the R2 Footwall Zone to the west and north of the intercepts in drillhole MLV-26-14A W1 (see Figure 3 and news release dated April 14, 2026). Drillhole MLV-26-14A W2 encountered four veins over 123.7 metres beginning at 890.6 metres down hole, including a 3.4 metre intercept which returned 9.4% copper, 2.3% nickel, 19.8 g/t gold, 2.8 g/t platinum, 6.0 g/t palladium, and 52.9 g/t silver (29.7% copper equivalent) from 958.2 metres down hole, including 1.5 metres grading 18.7% copper, 0.7% nickel, 44.3 g/t gold, 5.1 g/t platinum, 10.8 g/t palladium, and 103.8 g/t silver (57.0% copper equivalent). This represents the highest grade-thickness intercept encountered to date at the R2 Footwall Zone. Drillhole MLV-26-14A W3 encountered four veins over 115.4 metres down hole, including 22.5% copper, 1.4% nickel, 15.2 g/t gold, 10.0 g/t platinum, 24.7 g/t palladium, and 135.0 g/t silver (43.9% copper equivalent) over 1.1 metres from 1001.6 metres downhole, as well as 14.0% copper, 1.9% nickel, 15.4 g/t gold, 15.3 g/t platinum, 16.4 g/t palladium, and 96 g/t silver (36.2% copper equivalent) over 1.5 metres. Diamond drillhole MLV-26-41 is the first underground hole drilled from the 8451 drill bay on the 1800 Level targeting the R2 Footwall Zone (Figures 2 and 3) and it encountered three veins over 29.8 metres beginning at 411.9 metres down hole where it intercepted 2.2 metres of 7.2% copper, 2.7 g/t palladium, and 23.1 g/t silver (8.0% copper equivalent), followed by 26.2% copper, 5.0 g/t platinum, 14.4 g/t palladium, 0.5 g/t gold, and 82 g/t silver (30.4% copper equivalent) over 0.4 metres, beginning at 448.5 metres down hole.

As previously announced, the Company’s common shares will begin trading on the Toronto Stock Exchange at market open on Tuesday, June 23, 2026 and will continue to trade under the current stock symbol, “NICU”. In conjunction with the graduation onto the TSX, the Common Shares will be delisted from the TSX Venture Exchange, effective upon the commencement of trading on the TSX. Shareholders are not required to exchange their share certificates or take any other action in connection with the TSX listing, as there will be no change in the stock symbol or CUSIP for the Common Shares.

Figure 1: Location of Magna Mining’s Properties, Including the Levack Mine and Key Sudbury Infrastructure

Figure 2: 3D Longitudinal View Looking North, Showing the Levack Mine Mineralized Zones in Relation to the R2 Footwall Zone and Current Drilling

Figure 3: 3D Longitudinal View Looking North Northeast, Showing the R2 Footwall Zone and Current Drilling

Table 1: Summary of Drillhole Results

All lengths are downhole length. True widths are highly variable and estimated to range from 30-80% of downhole length. Ni Eq % = (Ni% x 85% Recovery 2204 x Ni Price $/lb) + (Cu% x 96% Recovery x 2204 x Cu Price $/lb) + (Co% x 56% Recovery x 2204 x Co Price $/lb) + (Pt g/t x 69% Recovery / 31.1035 x Pt $/oz) +(Pd g/t x 68% Recovery / 31.1035 x Pd $/oz) + (Au g/t x 68% Recovery / 31.1035 x Au $/oz))/2204 x Ni $/lb. Cu Eq % = (Ni% x 85% Recovery 2204 x Ni Price $/lb) + (Cu% x 96% Recovery x 2204 x Cu Price $/lb) + (Co% x 56% Recovery x 2204 x Co Price $/lb) + (Pt g/t x 69% Recovery / 31.1035 x Pt $/oz) +(Pd g/t x 68% Recovery / 31.1035 x Pd $/oz) + (Au g/t x 68% Recovery / 31.1035 x Au $/oz))/2204 x Cu $/lb. Metal prices in US$: $7.72/lb Ni, $4.88/lb Cu, $18.12/lb Co, $1,410/oz Pt, $1,156/oz Pd and $3,815/oz Au. 

Table 2: Drillhole Collar Coordinates

Qualified Person for Technical Information 

The scientific and technical information in this press release has been reviewed and approved by David King, M.Sc., P.Geo. Mr. King is the Senior Vice President, Exploration and Geoscience for Magna Mining Inc. and is a qualified person under National Instrument 43-101.

Quality Assurance and Control

Sample QA/QC procedures for Magna have been designed to meet or exceed industry standards. Drill core is collected from the diamond drill and placed in sealed core trays for transport to Magna’s core facilities. Levack drilling utilizes NQ sized core and McCreedy West utilizes BQTK sized core. The core is then logged, and samples marked in intervals of up to 1.5m. Levack drill core is split and sampled ½ core, and McCreedy West is whole core sampled. Samples are then put into plastic bags with 10 bagged samples being placed into rice bags for transport to SGS Laboratories in Garson, Ontario for preparation, which are then shipped to Lakefield, Ontario for analysis. Samples are submitted in batches of 50 with 4 QA/QC samples including, 2 certified reference material standards and 2 samples of blank material.

About Magna Mining Inc.

Magna Mining Inc. is a producing mining company with a strong portfolio of copper, nickel, and Platinum Group Metals assets located in the world-class Sudbury mining district of Ontario, Canada. The Company’s primary asset is the McCreedy West Mine, currently in production, supported by a pipeline of highly prospective past-producing properties including Levack, Crean Hill, Podolsky, and Shakespeare.

Magna Mining is strategically positioned to unlock long-term shareholder value through continued production, exploration upside, and near-term development opportunities across its asset base.

Additional corporate and project information is available at www.magnamining.com and through the Company’s public filings on the SEDAR+ website at www.sedarplus.ca.

For further information, please contact:

Jason Jessup
Chief Executive Officer
or
Paul Fowler, CFA
Executive Vice President
705-482-9667
Email: info@magnamining.com