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MSA.TO ·

Mineros S.A. Commences Trading on OTCQX

Listings & Exchange

Mineros S.A. Commences Trading on OTCQX

MEDELLIN, Colombia--(BUSINESS WIRE)--October 3, 2025--Mineros S.A. (TSX:MSA,

OTCQX:MNSAF, MINEROS:CB) (“Mineros” or the “Company”), a leading gold producer in

Latin America, is pleased to announce it has qualified to trade on the OTCQX® Best Market.

Mineros S.A. begins trading today on OTCQX under the symbol “MNSAF”. U.S. investors can

find current financial disclosures and Real-Time Level 2 quotes for the Company on

www.otcmarkets.com.

David Splett, Chief Financial Officer commented, “Upgrading to OTCQX is part of a continuing

initiative by Mineros to provide improved access and liquidity for our investors. Mineros elected

to trade on the OTCQX Best Market to address the strong US demand for high-quality gold

equities, and this will provide an avenue for investors to move shares into liquid markets. In

addition, for companies like Mineros, who are listed on a qualified international exchange,

streamlined market standards enable Mineros to use our current market reporting to make our

information available in the U.S."

ABOUT MINEROS S.A.

Mineros is a Latin American gold mining company headquartered in Medellin, Colombia. The

Company has a diversified asset base, with mines in Colombia and Nicaragua and a pipeline of

development and exploration projects throughout the region including the La Pepa Project in

Chile.

The board of directors and management of Mineros have extensive experience in mining,

corporate development, finance and sustainability. Mineros has a long track record of

maximizing shareholder value and delivering solid annual dividends. For almost 50 years

Mineros has operated with a focus on safety and sustainability at all its operations.

Mineros’ common shares are listed on the Toronto Stock Exchange under the symbol “MSA”,

and on the Colombia Stock Exchange under the symbol “MINEROS”.

Election of Directors – Electoral Quotient System

The Company has been granted an exemption from the individual voting and majority voting

requirements applicable to listed issuers under Toronto Stock Exchange policies, on grounds that

compliance with such requirements would constitute a breach of Colombian laws and regulations

which require the directors to be elected on the basis of a slate of nominees proposed for election

pursuant to an electoral quotient system. For further information, please see the Company’s most

recent annual information form, available on the Company’s website at

https://www.mineros.com.co/ and from SEDAR+ at www.sedarplus.com.

ABOUT OTC MARKETS GROUP INC.

OTC Markets Group Inc. (OTCQX: OTCM) operates regulated markets for trading 12,000 U.S.

and international securities. Our data-driven disclosure standards form the foundation of our

public markets: OTCQX® Best Market, OTCQB® Venture Market, OTCID™ Basic Market and

Pink Limited™ Market. Our OTC Link® Alternative Trading Systems (ATSs) provide critical

market infrastructure that broker-dealers rely on to facilitate trading. Our innovative model offers

companies more efficient access to the U.S. financial markets.

OTC Link ATS, OTC Link ECN, OTC Link NQB, and MOON ATS™ are each SEC regulated

ATS, operated by OTC Link LLC, a FINRA and SEC registered broker-dealer, member SIPC.

To learn more about how we create better informed and more efficient markets, visit

www.otcmarkets.com.

FORWARD-LOOKING STATEMENTS

This news release contains “forward looking information” within the meaning of applicable

Canadian securities laws. Forward looking information includes statements that use forward

looking terminology such as “may”, “could”, “would”, “will”, “should”, “intend”, “target”,

“plan”, “expect”, “budget”, “estimate”, “forecast”, “schedule”, “anticipate”, “believe”,

“continue”, “potential”, “view” or the negative or grammatical variation thereof or other

variations thereof or comparable terminology. Such forward looking information includes,

without limitation, statements with respect to trading on the OTCQX, the possibility for

improved access and increased liquidity.

Forward looking information is based upon estimates and assumptions of management in light of

management’s experience and perception of trends, current conditions and expected

developments, as well as other factors that management believes to be relevant and reasonable in

the circumstances, as of the date of this news release. While the Company considers these

assumptions to be reasonable, the assumptions are inherently subject to significant business,

social, economic, political, regulatory, competitive and other risks and uncertainties,

contingencies and other factors that could cause actual actions, events, conditions, results,

performance or achievements to be materially different from those projected in the forward-

looking information. Many assumptions are based on factors and events that are not within the

control of the Company and there is no assurance they will prove to be correct.

For further information of these and other risk factors, please see the “Risk Factors” section of

the Company’s annual information form dated March 31, 2025, available on SEDAR+ at

www.sedarplus.com.

The Company cautions that the foregoing lists of important assumptions and factors are not

exhaustive. Other events or circumstances could cause actual results to differ materially from

those estimated or projected and expressed in, or implied by, the forward-looking information

contained herein. There can be no assurance that forward-looking information will prove to be

accurate, as actual results and future events could differ materially from those anticipated in such

information. Accordingly, readers should not place undue reliance on forward-looking

information.

Forward-looking information contained herein is made as of the date of this news release and the

Company disclaims any obligation to update or revise any forward-looking information, whether

as a result of new information, future events or results or otherwise, except as and to the extent

required by applicable securities laws.

Contacts

For further information, please contact:

Ann Wilkinson

Vice President, Investor Relations

+1 (647) 496-3011

[email protected]

Juan Obando

Director, Investor Relations

(+57) 574 266 5757

[email protected]

Media Contact:

OTC Markets Group Inc., +1 (212) 896-4428, [email protected]