TTS.V · 2025-08-28 12:00:00

Tintina Announces Appointment of CEO and Changes to Board of Directors

Management Changes

TORONTO, August. 28, 2025 -- Tintina Mines Limited (“Tintina” or the “Company”) (TSXV:

TTS) announces that Juan Enrique Rassmuss, who is a Director, President & Chairman of the

Company and currently serves as Interim-CEO since February 26, 2025, has been appointed

as Chief Executive Officer (“CEO”) to replace Mr. Eugenio Ferrari who, for continuous medical

reasons, has presented his resignation as Director and CEO, effective August 27, 2025.

The Company also announced the appointment of Mr. Stefan Jochum, CFA, as Director with

effect from August 27, 2025.

Stefan Jochum, CFA, 46, has more than 20 years of experience in finance and the financial

industry. Currently, he also serves as a Chairman of Invercap S.A. the controlling shareholder

of CAP S.A., Chile (the leading iron ore and pellets producer on the American Pacific coast

and a relevant operator in the industrial and infrastructure segment), and as a board

member of CEMIN Holding Minero (a copper and gold producer in Chile) as well as Grupo

Olympic, Peru (an energy conglomerate active in oil, gas and power generation).

Previously, Mr. Jochum held board positions in industrial companies in Argentina and Peru as

well as in a power generator in Chile. He also worked for almost 10 years at UBS AG in

Germany and Switzerland.

Mr. Jochum holds a Bachelor & Postgraduate in International Business Administration from

the Georg-Simon-Ohm University of Nuremberg, Germany, and is a CFA charter holder.

“On behalf the Company and my fellow board members, I would like to sincerely thank

Eugenio for his invaluable contribution during his time as Director and CEO of Tintina and we

all wish him a hopefully speedy and full recovery,” stated Mr. Juan Enrique Rassmuss of

Tintina Mines.

About Tintina

Tintina Mines is a Canadian-based company with over two decades of experience in the

junior mining sector, focused in the acquisition, exploration, and development of base and

precious metal properties in South America and Canada.

Recently, Tintina expanded its portfolio with the addition of five new projects in Chile,

following the acquisition of a majority stake in Andean Belt Resources.

Tintina is committed to advancing the exploration and development of the copper-gold (Cu-

Au) Domeyko Sulfuros Project in the Atacama Region of northern Chile. Tintina Mines

Limited’s common shares are listed on the TSXV under the symbol “TTS”.

Tintina Contact:

Tintina Mines Limited

Mr. Jing Peng

82 Richmond Street East

Toronto, Ontario

M5C 1P1

Phone: (416) 848-9888

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defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy

or accuracy of this release.