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OMI.V ·

Sale of stake in Company

Corporate Updates

Orosur Mining Inc

Sale of stake in Company

London, 1st August 2025. Orosur Mining Inc. ("Orosur" or the "Company") (TSXV/AIM:OMI), has been

notified that Newmont Mining Corporation, who held a stake of approximately 9.4% in the Company, has

sold this holding to several institutional long -term investors, at a price of C$0.19 per common share of

Orosur. The sale of the stake is in keeping with Newmont's program of non-core divestments.

In its release of yesterday to the Toronto Stock Exchange, after market close, announcing the sale,

Newmont also stated that "Newmont may, depending on price, market conditions or other conditions or

factors it considers relevant from time to time, increas e its beneficial ownership, control or direction over

Common Shares or other securities of Orosur through market transactions, private agreements or

otherwise".

Orosur Executive Chairman Louis Castro commented:

"Whilst we are sad to see Newmont go, we understand that the sale of the stake is part of Newmont's

strategy of non-core disposals. Newmont has been a loyal and supportive partner to Orosur. We part on

good terms and we welcome a number of strong and knowledgeable long-term investors as we push further

into an exciting growth phase for the Company. Their investment is testament to the potential of the projects

we are developing"

For further information, visit www.orosur.ca, follow on X @orosurm or please contact

Orosur Mining Inc

Louis Castro, Chairman,

Brad George, CEO

[email protected]

Tel: +1 (778) 373-0100

SP Angel Corporate Finance LLP - Nomad & Joint Broker

Jeff Keating / Jen Clarke / Devik Mehta

Tel: +44 (0) 20 3470 0470

Turner Pope Investments (TPI) Ltd - Joint Broker

Andy Thacker/James Pope

Tel: +44 (0)20 3657 0050

Flagstaff Communications and Investor Communications

Tim Thompson

Mark Edwards

Fergus Mellon

[email protected]

Tel: +44 (0)207 129 1474

The information contained within this announcement is deemed by the Company to constitute inside

information as stipulated under the Market Abuse Regulations (EU) No. 596/2014 ('MAR') which has been

incorporated into UK law by the European Union (Withdrawa l) Act 2018. Upon the publication of this

announcement via Regulatory Information Service ('RIS'), this inside information is now considered to be

in the public domain.

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in policies of

the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

About Orosur Mining Inc.

Orosur Mining Inc. (TSXV: OMI; AIM: OMI) is a minerals explorer and developer currently operating in Colombia,

Argentina and Nigeria.