Mr. Lewis Lawrick reports

MAGNA TERRA EXTENDS THE SURFACE FOOTPRINT OF THE BIRCH ZONE TO 4.4 KILOMETRES AT THE HUMBER COPPER PROJECT, WESTERN NEWFOUNDLAND

Magna Terra Minerals Inc.'s summer surface prospecting of copper-silver mineralization has successfully extended the strike extent of the Birch zone copper and silver mineralization to 4.4 kilometres at the Humber copper project, located in western Newfoundland.

The work, part of a phase 1 2026 exploration program, was designed to follow-up on a successful initial exploration program in 2025 that resulted in the discovery of the 2.2-kilometre Birch zone, as well as the identification of several high-priority combined geophysical and geochemical (copper, cobalt) targets for follow-up prospecting.

Work completed to date at Humber includes:

• Prospecting including the collection of 246 rock grab outcrop and float samples across the project with 148 samples (60 per cent) collected from the Birch zone and Hughes Lake trends;
• Collection of 436 soil samples to test additional three kilometres extent southwest of the Birch zone;
• Collection of 169 regional stream sediment samples to complete coverage of the property in remote areas not sampled in 2025;
• Flying of a property-wide lidar (light detection and ranging) remote-sensing survey to aid in structural interpretation.

Highlights of the work completed to date include:

• Extension of the Birch zone dolomite-hosted mineralization by 0.5 kilometre to the northeast with assays up to 1.60 per cent Cu (copper) and 1.7 g/t (grams per tonne) Ag (silver); expanding the footprint of surface copper and silver mineralization from 2.2 kilometres to 2.7 kilometres;
• Discovery of additional copper and silver mineralization over 1.7 kilometres to the immediate southwest of the Birch zone dolomite, hosted as disseminations and quartz veins within mafic volcanic/intrusive and clastic sedimentary rocks with significant assays of 2.20 per cent Cu, 35.3 g/t Ag and 129 ppb (parts per billion) Au, and 1.28 per cent Cu and 15.0 g/t Ag;
• Identification of additional copper mineralization 2.7 kilometres to the southwest along strike of the Birch zone near Little North Pond with assays up to 0.26 per cent Cu and 2.1 g/t Ag;
• Results are pending for the soil and stream sediments and will be reported in a future news release.

Magna Terra would like to acknowledge and thank the province of Newfoundland and Labrador for partial financial assistance granted for work on the Humber copper project under the Junior Exploration Assistance Program (JEA).

"Our summer 2026 prospecting and mapping program has been very successful. Having first identified the Birch zone copper discovery in summer 2025, and now tracing significant surface copper-silver mineralization over a strike length of 4.4 kilometres is very encouraging. This extension and the identification of multiple host rocks is indicative of a dynamic and structurally controlled mineralizing environment. The presence of anomalous copper mineralization, a further 2.7 kilometres southwest of the Birch zone at Little North Pond, along the same magnetic low feature highlights an opportunity for further growth. We have covered this zone with soil samples and look forward to updating shareholders on those results, the regional stream sediment samples, and the lidar analysis when results are received. In the meantime, we are planning a 20-line-kilometre induced polarization ground geophysical survey at the Birch zone in order to develop more specific targets for future advanced testing. We are very grateful for the financial support provided through the JEA program by the government of the province of Newfoundland and Labrador on the Humber copper project."

~ Lew Lawrick, president and chief executive officer, Magna Terra Minerals

Prospecting and geological mapping details

Systematic prospecting and geological mapping was completed with the goal of 1) expanding the footprint of the Birch zone and Hughes Lake trends, and 2) following up on regional stream sediment and airborne conductors from work in 2025 (see news releases dated Nov. 4, 2026, Nov. 18, 2025, and March 11, 2026).

A total of 246 rock, grab, float and outcrop samples were collected and submitted to Eastern Analytical Ltd. in Springdale, Nfld., for gold and multielement analysis. All assay results have been returned with copper values ranging from 5 to 22,000 parts per million (2.20 per cent) Cu and 44 of the 246 rock samples (17.9 per cent) analyzing over 500 ppm Cu from the vicinity of the Hughes Lake and Birch zone trends. Additionally, silver values range from 0.2 to 35.3 ppm (g/t) Ag, with four of the 246 rock samples (1.6 per cent) analyzing over five ppm Ag and associated with significant copper in quartz vein-hosted mineralization.

Prospecting was successful in extending surface dolomitized-limestone hosted copper-silver mineralization at the Birch zone an additional 0.5 kilometre to the northeast, expanding that style of mineralization from 2.2 kilometres to 2.7 kilometres with assays from grab samples up to 1.60 per cent Cu and 1.7 g/t Ag. Toward the southwest along strike, the style and host-rock to copper mineralization changes to predominantly quartz vein-hosted within mafic volcanics/intrusive and clastic sedimentary rocks. The identification of copper and silver mineralization hosted within quartz veins and disseminations in mafic volcanics and clastic sediments to the southwest of the main dolomite-hosted mineralization is indicative that the Birch zone mineralization is present in multiple host rocks and developed or was remobilized during deformation. Assays up to 2.20 per cent Cu and 35.3 g/t Ag were obtained from grab samples in this area.

Copper mineralization from outcrop grab samples of sandstone collected 2.7 kilometres southwest of the Birch zone near Little North Pond with assays up to 0.26 per cent Cu and 2.1 g/t Ag, highlighting the potential for further strike extension of the zone marked by a prominent magnetic low feature.

Regionally, reconnaissance prospecting of anomalous copper and cobalt-bearing stream sediment and airborne conductivity anomalies identified in 2025 did not lead to identification of significant copper or cobalt mineralization.

Humber copper project highlights

• 4.4 kilometres of surface copper mineralization at the Birch zone, with potential to expand a further 2.7 kilometres based on underlying geophysics and rock samples;
• Eight-plus-kilometre Hughes Lake copper trend;
• Airborne geophysical conductors coincident with lake and stream sediment Cu and Co anomalies;
• District-scale land package comprising 49,925 hectares;
• Located within the premier mining jurisdiction of Newfoundland and Labrador;
• Year-round accessibility with road access to the majority of the project;
• First mover advantage in a previously unrecognized area of exploration potential;
• Acquired through staking -- cost-effective acquisition and with no underlying royalties or option payments.

Qualified person and technical notes

This news release has been reviewed and approved by David A. Copeland, PGeo, vice-president, exploration, and non-independent qualified person under National Instrument 43-101 -- Standard for Disclosure for Mineral Projects.

All rock samples collected from current fieldwork were submitted to Eastern Analytical in Springdale, Nfld., and were analyzed for gold (30 g fire assay) and multielement geochemistry, including elements Cu (copper), Pb (lead), Zn (zinc), Co (cobalt) and Ag (silver) (method ICP-34).

About Magna Terra Minerals Inc.

Magna Terra Minerals is a precious- and critical-metals-focused exploration company, headquartered in Toronto, Canada. Magna Terra is focused on acquiring and advancing its high-potential mineral projects in Atlantic Canada and Argentina while generating value for shareholders and minimizing shareholder dilution through option and joint venture partnerships where appropriate; leveraging the company's ability to explore, grow and transact projects. The company is focused on exploring its 100-per-cent-owned Humber copper and Shellbird projects in Newfoundland and Labrador; the company's Rocky Brook gold and critical metals project in the historic Bathurst mining camp of New Brunswick; as well as the prospect Or's Dream and Cape Spencer gold projects in New Brunswick. The company also owns a 100-per-cent interest in six discreet precious metals projects covering approximately 79,000 hectares in the province of Santa Cruz, Argentina, which are available for purchase or option/joint venture. The company currently has active option agreements on its Great Northern project in Newfoundland and Luna Roja project in Santa Cruz, with Gold Hunter Resources and Lunex Metals, respectively.

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