Mr. Guy Le Bel reports

XXIX ADVANCES THIERRY COPPER PROJECT WITH COMPREHENSIVE VALIDATION AND REINTERPRETATION OF 210,000 METRES OF DRILLING

XXIX Metal Corp. has provided an overview of the K1 and K2 zones at its Thierry project.

Highlights:

• Thierry's K1 reinterpretation complete and K2 validation nearing completion, integrating over 210,000 metres of drilling;
• K1 supports a bulk-tonnage model with grades potentially increasing with depth;
• Recently completed IP survey indicates potential sulphide mineralization between K1 and K2;
• Higher copper and PGE prices improve potential project economics;
• Thierry benefits from strong infrastructure, road access and brownfield development aspects.

XXIX has applied the same data validation and reinterpretation discipline used at Opemiska, where this work materially enhanced understanding of a historical mining camp to the Thierry copper project. Like Opemiska, Thierry is a past-producing system supported by a substantial historical data set, including more than 210,000 metres of drilling and extensive geological and geophysical data.

Over the past two years, XXIX's technical team has converted this legacy information into a modern, validated geological database. This work establishes a robust foundation for resource definition, expansion and a clearer understanding of system-scale, critical prerequisites for value creation.

Thierry represents a rare, underappreciated opportunity. Large, multibillion-pound copper assets in Canada are increasingly scarce, and XXIX controls two of the three largest copper resources in Eastern Canada. Importantly, Thierry is unencumbered and carries no royalties.

XXIX's new interpretation departs materially from historical models. The company now sees potential for a higher-grade underground operation at K2, alongside a large-scale, bulk-tonnage copper/platinum group element open pit at K1.

Recent IP survey results support this evolving geological model, highlighting compelling targets at K1 and K2 and along the corridor connecting them. The data increasingly suggest sulphide mineralization between the two zones. XXIX plans a targeted drill program to test this potential and define scale.

New geological interpretation at K1; data validation at K2

XXIX has completed a comprehensive data cleaning and reinterpretation exercise at K1 and is currently reviewing K2's extensive geological database. Together, K1 and K2 represent over 210,000 metres of historical drilling, in addition to historical geological and geophysical surveys conducted.

Mineralization at the K1 zone has historically been interpreted as subparallel tabular zones. Upon further analysis by XXIX's technical team of the drill data, geology and mining method options, and incorporating additional data previously not considered (including unassayed drill core) the company interprets K1 under a disseminated mineralization and bulk open-pit mining model.

The company also sees an increase in grade corresponding with increasing depth, while the deposit remains open to the east.

Updated economic parameters and improved metal prices

Significant opportunity exists to expand current resources at K1 and K2 under improved metal prices. The existing mineral resource estimates at K1 and K2, completed in 2021, incorporate a copper price of $3.75 (U.S.) per pound, while copper price today is well above $5 (U.S.) per pound, resulting in lower potential cut-off grades and reducing the threshold for including mineralization previously considered uneconomic under a lower copper pricing environment.

Exploration supported by in-place infrastructure

Thierry benefits from having excellent in-place infrastructure, supported by the town of Pickle Lake, including easy access through a well-maintained road, power and water, airport, and access to rail -- positioning Thierry for efficient development.

The company expects to have an active exploration season to further evaluate high-potential targets for follow-up exploration and drilling and ultimately begin unlocking Thierry's full potential throughout 2026.

Qualified person statement

The technical information contained in this news release has been reviewed and approved by Denis McNichols, PGeo, Geo, vice-president exploration for XXIX Metal, a qualified person as defined in National Instrument 43-101, Standards of Disclosure for Mineral Projects.

About XXIX Metal Corp.

XXIX is advancing its Opemiska and Thierry copper projects, two significant Canadian copper assets. The Opemiska project, one of Canada's highest-grade open-pittable copper deposits, spans 21,333 hectares in Quebec's Chapais-Chibougamau region, with strong infrastructure and nearby access to the Horne smelter. An October, 2025, preliminary economic assessment outlined a 12,500-tonne-per-day open-pit operation over a 17-year mine life, generating an after-tax net present value (discounted at 8 per cent) of $505-million, an internal rate of return of 27.2 per cent and a 2.3-year payback period (copper price of $4.35 per pound, gold price of $3,000 per ounce and silver price of $30 per ounce). The Thierry project hosts the K1 (near surface) zone and the past-producing K2 (underground and surface) zone (see XXIX's news release dated Oct. 1, 2024, for details regarding resources). Thierry has significant infrastructure in place, including an all-season road, an airport within five kilometres, a provincial power grid within eight kilometres and nearby rail. With these two high-potential projects, the company has solidified its position as a key player in the Canadian copper sector and has established itself as one of Eastern Canada's largest copper developers.

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