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MSA.TO ·

Mineros S.a. Added to Mvis Global Junior GOLD Miners Index (Gdxj), Solactive Junior GOLD Miners Custom Factors Index, Ftse Global Equity Index Series (Small Cap), and Tevaicol ETF Reflecting Enhanced Institutional Investor Exposure

Listings & Exchange

TSX:MSA BVC:MINEROS OTC QX:MNSAF MINEROS.COM.CO

MINEROS S.A. ADDED TO MVIS GLOBAL JUNIOR GOLD MINERS

INDEX (GDXJ), SOLACTIVE JUNIOR GOLD MINERS CUSTOM

FACTORS INDEX, FTSE GLOBAL EQUITY INDEX SERIES (SMALL

CAP), AND TEVAICOL ETF REFLECTING ENHANCED INSTITUTIONAL

INVESTOR EXPOSURE

MEDELLÍN, Colombia – September 14, 2026 – Mineros S.A. (TSX: MSA; BVC: MINEROS;

OTCQX: MNSAF) (“Mineros” or the “Company”) is pleased to announce that it has been added

to the MVIS Global Junior Gold Miners Index ("MVGDXJ"), the underlying index of the VanEck

Junior Gold Miners ETF ("GDXJ"), pursuant to the index's semi -annual review and quarterly

rebalancing. In addition, Mineros has been added to the Solactive Junior Gold Miners Custom

Factors Index, the underlying index of the Sprott Junior Gold Miners ETF ("SGDJ"), and to the

Small Cap segment of the FTSE Global Equity Index Series pursuant to each of their semi-annual

reviews. Each of these changes will be implemented at the close of trading on Friday, September

18, 2026, and effective from the open on Monday, September 21, 2026. Finally, the creation of

the TEVA Colombia Equity Index, the underlying benchmark for TEVAICOL, the first locally

managed Colombian equity ETF, recently launched on the Colombian Stock Exchange on

September 10, 2026, is expected to provide demand for Mineros common shares through its

anticipated addition to TEVAICOL ETF

"Inclusion in industry indexes validates all of our team’s hard work to improve Mineros’ operations

and strengthen our balance sheet," said Daniel Henao, President and Chief Executive Officer.

"These additions will broaden our shareholder base by increasing access to institutional capital

and enhance trading liquidity. More broadly, they reflect the progress we have made on our

producing assets and the near -term value creation opportunity represented by our growth

portfolio."

ABOUT MINEROS S.A.

Mineros is a leading Latin American gold mining company headquartered in Medellín, Colombia.

The Company operates a diversified portfolio of assets in Colombia and Nicaragua and maintains

a pipeline of development and exploration projects across the region, including the La Pepa

Project in Chile and an exploration project in the Tolima department, near Cajamarca, Colombia.

With more than 50 years of operating history, Mineros maintains a longstanding focus on safety,

sustainability, and disciplined capital allocation. Its common shares are listed on the Toronto

Stock Exchange (MSA) and the Colombian Stock Exchange (MINEROS) and trade on the

OTCQX® Best Market under the symbol MNSAF.

TSX:MSA BVC:MINEROS OTC QX:MNSAF

For further information, please contact:

Ann Wilkinson

Vice President, Investor Relations

+1 647-496-3011

[email protected]

Juan Obando

Director, Investor Relations

+57 (4) 266-5757

[email protected]

FORWARD-LOOKING STATEMENTS

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

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

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

“estimate”, “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 regarding the impact of the Company’s

inclusion in the VanEck Junior Gold Miners ETF, the Sprott Junior Gold Miners ETF and the FTSE

Global Equity Index Series, and the potential for increased investor visibility and liquidity.

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

management’s experience and perception of 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, including, without limitation, assumptions

about: future prices of gold and other metal prices; the accuracy of any mineral reserve and

mineral resource estimates; production costs; the price of other commodities such as fuel;

equipment or processes operating as anticipated; permitting timelines; political and regulatory

stability; the receipt of governmental, regulatory and third party approvals, licenses and permits

on favourable terms; obtaining required renewals for existing approvals, requirements under

applicable laws; sustained labour stability; stability in financial and capital goods markets;

availability of equipment; inflation; exchange rates; and positive relations with local groups. 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 c ould 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 that they will prove to be correct.

Although the Company has attempted to identify important factors that could cause actual actions,

events, conditions, results, performance or achievements to differ materially from those described

TSX:MSA BVC:MINEROS OTC QX:MNSAF

in forward-looking information, there may be other factors that cause actions, events, conditions,

results, performance or achievements to differ from those anticipated, estimated or intended. 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, 2026, and management’s discussion and

analysis for the three and six months ended June 30, 2026, available on SEDAR+

atwww.sedarplus.com.

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-lo oking 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.