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BVC:MINEROS TSX:MSA OTCQX:MNSAF MINEROS.COM.CO Mineros S.A. Returns Capital to Shareholders with Share Repurchase Program in Colombia

Financings

BVC:MINEROS TSX:MSA OTCQX:MNSAF MINEROS.COM.CO

Mineros S.A. Returns Capital to Shareholders with Share Repurchase Program in

Colombia

Medellin, Colombia – May 21, 2026 – Mineros S.A. (TSX:MSA, OTCQX:MNSAF,

BVC:MINEROS) (“Mineros” or the “ Company”), a leading gold producer in Latin America,

announces that it is repurchasing 2,986,851 common shares of the Company at a price of

COP$16,500, which is equivalent to C$6.06 per share (COP$2,722.15/CAD$1.00 on May 15,

2026) for a total aggregate value of COP$49,283,041,500 (US$13.3 million

(COP$3,796.87/US$1.00) under the share repurchase offer (an Oferta de Readquisición de

Acciones, or “ ORA”), carried out through the facilities of the Colombian Stock Exchange (the

“BVC”) from May 11, 2026 to May 15, 2026. The price represents a premium of 13.8% compared

to the closing price of the Company’s common shares on the BVC on May 15, 2026. The

settlement date for the repurchases will be May 26, 2026.

Shares tendered to the ORA total ed 6,572,905 shares representing 195% of the maximum

amount.

The ORA was conducted pursuant to the Share Repurchase Program approved by the General

Shareholders’ Assembly of Mineros at its ordinary meeting held on March 27, 2026, which (i)

approved a share repurchase program for an aggregate value of up to USD$80.0 million, to be

executed through one or more repurchase offers within a maximum period of three (3) years from

March 27, 2026, and (ii) authorized the Board of Directors to regulate the Share Repurchase

Program and define and approve its specific terms and conditions. The completion of this ORA

represents the first tranche executed under the Share Repurchase Program.

Following settlement, the number of outstanding common shares of the Company will decrease

from 295,780,517 to 292,793,666 shares.

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 the exploration project in Tolima 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.

BVC:MINEROS TSX:MSA OTCQX:MNSAF 2

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

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, the timing of the

completion of the share buyback, the timing and amount of repurchases of shares; and any other

statement that may predict, forecast, indicate or imply future plans, intentions, levels of activity,

results, performance or achievements.

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 an d 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 most recent annual information form, 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 forw ard looking information

BVC:MINEROS TSX:MSA OTCQX:MNSAF 3

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 other wise, except as and to the extent

required by applicable securities laws.