Dr. Graham Carman reports

TINKA ANNOUNCES EFFECTIVE DATE OF SHARE CONSOLIDATION

Further to Tinka Resources Ltd.'s news release dated Sept. 8, 2025, and Sept. 10, 2025, Tinka Resources Ltd. has received approval from TSX Venture Exchange for the consolidation of its common shares on the basis of one postconsolidation share for every five preconsolidation shares.

The company's name and trading symbol will remain unchanged following the consolidation and the shares will begin trading on a postconsolidation basis on Oct. 1, 2025, under a new Cusip number of 887522803 and new ISIN (international securities identification number) of CA8875228030.

As of the date of this news release, the company currently has 408,696,885 shares issued and outstanding, and, immediately following the consolidation, the company is expected to have approximately 81,739,377 shares issued. Following the closing of the company's non-brokered private placement, which was also announced by the company on Sept. 8, 2025, and on Sept. 10, 2025, the company is expected to have approximately 132,648,468 shares issued and outstanding. Management believes the consolidation will help improve marketability of the company's shares and attract new shareholders to the company's register.

No fractional shares will be issued as a result of the consolidation. Any fractional shares resulting from the consolidation will be rounded up or down to the nearest whole share. The company's outstanding incentive stock options, warrants and any other convertible securities will be adjusted on a 1:5 basis and their respective exercise prices will be increased on a 1:5 basis to reflect the consolidation.

Letters of transmittal with respect to the consolidation will be mailed to all registered shareholders of the company. All registered shareholders will be required to send their respective certificates representing the preconsolidation shares, along with a properly executed letter of transmittal to the company's transfer agent, Computershare Trust Company of Canada, in accordance with the instructions provided in the letter of transmittal. All shareholders who submit a duly completed letter of transmittal along with their respective preconsolidation share certificate(s) to the transfer agent will receive a postconsolidation share certificate or direct registration system (DRS) statement representing the postconsolidation shares. No action is required by beneficial shareholders of the company to receive postconsolidation shares in connection with the consolidation. Beneficial shareholders who hold their preconsolidation shares through intermediaries (for example, a broker, bank, trust company investment dealer or other financial institution) and who have questions regarding how their preconsolidation shares will be processed in connection with the consolidation should contact their intermediaries.

About Tinka Resources Ltd.

Tinka is an exploration and development company with its flagship property, being the 100-per-cent-owned Ayawilca zinc-silver-tin project in central Peru, and is also exploring the nearby Silvia copper-gold project. Mineral resources at Ayawilca include the Zinc zone, which has an estimated indicated mineral resource of 28.3 million tonnes grading 5.8 per cent zinc, 16.4 grams per tonne silver, 0.2 per cent lead and 91 grams per tonne indium and an inferred mineral resource of 31.2 million tonnes grading 4.2 per cent zinc, 14.5 grams per tonne silver, 0.2 per cent lead and 45 grams per tonne indium. The Tin zone at Ayawilca has an estimated indicated mineral resource of 1.4 million tonnes grading 0.72 per cent tin and an inferred mineral resource of 12.7 million tonnes grading 0.76 per cent tin. The company filed a National Instrument 43-101 technical report on an updated PEA (preliminary economic assessment) for the Ayawilca project on April 15, 2024. Dr. Graham Carman, Tinka's president and chief executive officer, has reviewed, verified and approved the technical contents of this release. Dr. Carman is a fellow of the Australasian Institute of Mining and Metallurgy and is a qualified person as defined by NI 43-101.

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