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OMI.V ·

Exercise of RSUs and options

Mergers & Acquisitions Share Capital & Compensation

Orosur Mining Inc

Exercise of RSUs and options

London, November 4, 2025 . Orosur Mining Inc. ("Orosur" or the

"Company") (TSX/AIM:OMI) announces the following:

The Company has issued 4,358,332 Common Shares ("Shares")

representing 1.13% of the Company's current issued share capital, following

the exercise of 3,123,332 RSUs and 1,280,000 options by directors and

consultants of the Company. All of the directors will be retaining their Shares

and not selling after exercise.

Mr Brad George, CEO, has exercised 1,350,000 RSUs; Mr Thomas Masney,

non-executive director has exercised 200,000 RSUs; and, Joaquin Sarroca,

Commercial VP, has exercised 521,666 RSUs. In addition, Mr Nick von

Schirnding, non-executive director, has exercised 300,000 options at a price

of CAD$0.06 under the cashless mechanism set out in the Company's Equity

Incentive Plan resulting in the issue to him of 255,000 Shares.

After these exercises, and including their current holdings in the Company,

Mr George will hold 1,662,000 Shares; Mr Masney will hold 210,000 Shares;

Mr Sarroca will hold 632,000 Shares and Mr von Schirnding will hold 439,000

Shares.

The consultants have exercised a total of 1,051,666 RSUs resulting in the

issue of 1,051,666 Shares plus, 500,000 options at an exercise price of

CAD$0.325 and 480,000 options at an exercise price of CAD$0.22 resulting

in the issue of 980,000 Shares.

Application has been made for 4,358,332 Common Shares, which rank pari

passu with the existing Common Shares in issue, to be admitted to trading

on AIM ("Admission"). It is expected that Admission will become effective

and dealings will occur at 8:00am UK time on or around November 4, 2025.

Following Admission of these 4,358,332 Shares, for the purposes of the

Disclosure Guidance and Transparency Rules, the Company will have

391,522,512 Common Shares in issue. Shareholders may use this figure as

the denominator for the calculations by which they will determine if they are

required to notify their interest in, or a change to their interest in, the issued

share capital of the Company.

Following Admission, the Company will have 3,421,668 options outstanding

and 9,150,000 RSUs outstanding.

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.

Defined terms in this Announcement shall have the same meaning as set out in the announcement

released on September 18, 2025 unless otherwise stated.

About Orosur Mining Inc.

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

Argentina.

Details of the person discharging managerial responsibilities/person closely associated

a) Name: 1. Brad George

2. Thomas Masney

3. Nick Von Schirnding

4. Joaquin Sarroca

2. Reason for the notification

a) Position/status: 1. CEO

2. Independent Non-Executive Director

3. Independent Non-Executive Director

4. Commercial VP (Non-Board PDMR)

b) Initial notification/Amendment: Initial notification

3. Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction

monitor

a) Name: Orosur Mining Inc

b) LEI: 213800CRYQM3M8G1OI19

4. Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of

transaction; (iii) each date; and (iv) each place where transactions have been conducted

a) Description of the financial instrument,

type of instrument:

Identification code:

Common shares without par value

CA6871961059

b) Nature of the transaction: 1. Exercise of RSUs

2. Exercise of RSUs

3. Exercise of Options

4. Exercise of RSUs

c) Price(s) and volume(s):

Price(s) Volume(s)

1) nil

2) nil

3) CAD$0.06

4) nil

1,350,000

200,000

Issue of 255,000

Common Shares

following exercise of

300,000 options under

cashless mechanism in

Company's Equity

Incentive Plan

521,666

d) Aggregated information:

Aggregated volume:

Price:

2,326,666

nil

e) Date of the transaction: 3 November 2025

f) Place of the transaction: AIM