TR-1: Standard Form for Notification of Major Holdings

November 5, 2026 7:06 AM EST

London, United Kingdom--(Newsfile Corp. - November 5, 2026) - Orosur Mining Inc(TSXV: OMI) (AIM: OMI) ("Orosur" or "the Company") advises that it has received a TR-1 Standard form notification of major holdings from 1832 Asset Management L.P., dated November 04, 2026.

NOTIFICATION OF MAJOR HOLDINGS (to be sent to the relevant issuer and to the FCA in Microsoft Word format if possible) i

1a. Identity of the issuer or the underlying issuer of existing shares to which voting rights are at-tached ii:OROSUR MINING INC
1b. Please indicate if the issuer is a non-UK issuer (please mark with an "X" if appropriate)
Non-UK issuerX
2. Reason for the notification (please mark the appropriate box or boxes with an "X")
An acquisition or disposal of voting rightsX
An acquisition or disposal of financial instruments
An event changing the breakdown of voting rights
Other (please specify) iii:
3. Details of person subject to the notification obligation iv
Name1832 Asset Management L.P.
City and country of registered office (if applicable)Toronto, Canada
4. Full name of shareholder(s) (if different from 3.) v
Name
City and country of registered office (if applicable)
5. Date on which the threshold was crossed or reached vi:02/11/2026
6. Date on which issuer notified (DD/MM/YYYY):04/11/2026
7. Total positions of person(s) subject to the notification obligation

% of voting rights at-tached to shares (to-tal of 8. A)% of voting rights through financial instru-ments
(total of 8.B 1 + 8.B 2)
Total of both in % (8.A + 8.B)Total number of voting rights held in issuer (8.A +
8.B) vii
Resulting situation on the date on which
threshold was crossed or reached
4.854683%
4.854683%21,957,788
Position of previous notification (if applicable)9.981172%
9.981172%40,025,000

8. Notified details of the resulting situation on the date on which the threshold was crossed or reached viii
A: Voting rights attached to shares
Class/type of shares
ISIN code (if possible)
Number of voting rights ix% of voting rights
Direct
(DTR5.1)
Indirect
(DTR5.2.1)
Direct
(DTR5.1)
Indirect
(DTR5.2.1)
Equity: CA6871961059
21,957,788
4.854683










SUBTOTAL 8. A21,957,7884.854683

B 1: Financial Instruments according to DTR5.3.1R (1) (a)
Type of financial in-strumentExpiration date xExercise/ Conversion Period xiNumber of voting rights that may be acquired if the instrument is exercised/converted.% of voting rights
















SUBTOTAL 8. B 1

B 2: Financial Instruments with similar economic effect according to DTR5.3.1R (1) (b)
Type of financial instrumentExpiration date xExercise/ Conversion Pe-riod xiPhysical or cash Settlement xiiNumber of voting rights% of voting rights



















SUBTOTAL
8.B.2


9. Information in relation to the person subject to the notification obligation (please mark the applicable box with an "X")
Person subject to the notification obligation is not controlled by any natural person or legal entity and does not control any other undertaking(s) holding directly or indirectly an interest in the (underlying) issuer xiii
Full chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively held starting with the ultimate controlling natural person or legal entity (please add additional rows as necessary) xiv
X
Name xv% of voting rights if it equals or is higher than the notifiable threshold% of voting rights through financial in-struments if it equals or is higher than the
notifiable threshold
Total of both if it equals or is higher than the notifiable threshold
1832 Asset Manage-ment L.P. (1832AMLP)
(ultimate controlling per-son)
4.854683%0%4.854683%
Dynamic Precious Met-als Fund (mutual fund managed by 1832AMLP) (see additional infor-
mation below)
3.564660%0%3.564660%
Dynamic Strategic Gold Class (mutual fund man-aged by 1832AMLP) (see additional infor-
mation below)
1.290023%0%1.290023%








10. In case of proxy voting, please identify:
Name of the proxy holder1832 Asset Management L.P.
The number and % of voting rights held4.854683%
The date until which the voting rights will be held

11. Additional information xvi
1832 Asset Management L.P. (1832AMLP) - 1832AMLP was formed as a limited partnership un-der the laws of Ontario, Canada, and its general partner is 1832 Asset Management G.P. Inc., each of which are a wholly-owned subsidiary of The Bank of Nova Scotia.

Dynamic Precious Metals Fund is a mutual fund registered in the province of Ontario. 1832AMLP is the portfolio manager of the Dynamic Precious Metals Fund and therefore has the investment discretion and to power to vote proxies on behalf of this mutual fund.

Dynamic Strategic Gold Class is a mutual fund registered in the province of Ontario. 1832AMLP is the portfolio manager of the Dynamic Strategic Gold Class and therefore has the investment discretion and to power to vote proxies on behalf of this mutual fund.

Place of completionToronto
Date of completion04/11/2026

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 & Broker
Jen Clarke / Caroline Rowe / Devik Mehta
Tel: +44 (0) 20 3 470 0470

Turner Pope Investments (TPI) Ltd - Joint Broker
Andy Thacker/ Guy McDougall
Tel: +44 (0)20 3657 0050

Flagstaff Communications
Tim Thompson
Fergus Mellon
Allison Allfrey
[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 (Withdrawal) 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 and Argentina.

Not for distribution to United States news wire services or for dissemination in the United States.

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/322676



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