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Orosur Announces Closing of Brokered Private Placement for Gross Proceeds of C$6.0 Million

Financings

Orosur Announces Closing of Brokered Private Placement for Gross

Proceeds of C$6.0 Million

NOT FOR DISTRIBUTION TO U.S. NEWS WIRE SERVICES OR DISSEMINATION IN THE

UNITED STATES.

London, March 27th, 2025 - Orosur Mining Inc. (“Orosur” or the “Company”) (TSX-V/AIM:OMI)

is pleased to announce the closing of its previously announced “best efforts” private placement

offering (the “Offering”) for aggregate gross proceeds of C$ 6,000,000, which in cludes the full

exercise of the agent’s option for gross proceeds of C$1,000.000. Under the Offering , the

Company sold an aggregate of 35,294,117 units of the Company (the “Units”) at a price of C$0.17

per Unit.

Each Unit consists of one common share of the Company (each, a “Unit Share”) and one half of

one common share purchase warrant (each whole warrant, a “ Warrant”). Each whole Warrant

shall entitle the holder to purchase one common share of the Company (each, a “Warrant Share”)

at a price of C$0.25 at any time on or before March 27, 2027.

Red Cloud Securities Inc. (the “ Agent”) acted as sole agent and bookrunner in connection with

the Offering. In consideration for their services, the Agent received a cash commission of

C$313,860 and 1,846,235 broker warrants (the “Broker Warrants”). Each Broker Warrant shall

be exercisable for one common share of the Company at a price of C$0.17 per common share at

any time on or before March 27, 202 7. Additionally, as consideration for financial advisory

services in connection with the Offering, the Company paid the Agent an advisory fee of $8,070.00

and issued 47,470 advisory warrants (the “Advisory Warrants”) to the Agent. Each Advisory

Warrant is exercisable into one common share on the same terms as the Broker Warrants. The

common shares issuable pursuant to the Broker Warrants and the Advisory Warrants are subject

to a hold period in Canada ending on July 28, 2025.

Subject to compliance with applicable regulatory requirements and in accordance with National

Instrument 45-106 – Prospectus Exemptions (“NI 45-106”), 29,411,764 Units (the “LIFE Units”)

were sold to purchasers in the provinces of British Columbia Manitoba, Ontario and

Saskatchewan (the “ Canadian Selling Jurisdictions ”) pursuant to the listed issuer financing

exemption under Part 5A of NI 45-106. The Unit Shares and Warrant Shares underlying the LIFE

Units will be immediately freely tradeable under applicable Canadian securities legislation if sold

to purchasers resident in Canada.

5,882,353 Units were sold to purchasers outside of Canada, including to purchasers resident in

the United States pursuant to one or more exemptions from the registration requirements of the

United States Securities Act of 1933, as amended.

Due to the high level of investor demand, the directors were unable to participate in the Offering

as previously anticipated.

The Company intends to use the net proceeds of the Offering principally to advance the

Company's Anzá exploration project in Colombia as well as for general working capital and

corporate purposes.

The securities offered have not been, nor will they be, registered under the U nited States

Securities Act, of 1933 (the “U.S. Securities Act”) as amended, or any state securities law, and

may not be offered, sold or delivered, directly or indirectly, within the United States, or to or for

the account or benefit of U.S. persons, absent registration or an exemption from such registration

requirements. This news release does not constitute an offer to sell or the solicitation of an offer

to buy nor shall there be any sale of securities in any state in the United States in which such

offer, solicitation or sale would be unlawful.

Application has been made for the 35,294,117 common shares, which rank parri 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 31

March 2025.

Following the clos ing of the Offering and for the purposes of the Disclosure Guidance and

Transparency Rules, the Company will have 312,439,904 Common Shares in issue. This figure

includes an additional 2,055,932 new common shares of no par value each issued following an

exercise of 2,055,932 warrants from its block listing announced January 8 th 2025. 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 intere st in, the issued share capital of

the Company.

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-V nor its Regulation Services Provider (as that term is defined in policies of the TSX-V) 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.

About the Anzá Project

Anzá is a gold exploration project (“Anzá Project”), comprising three exploration licences, four

exploration licence applications, and a small exploitation permit, totalling 176km2 in the prolific

Mid-Cauca belt of Colombia. Post the acquisition of Minera Monte Aguila S.A.S, the area of the

Anzá Project has increased substantially to approximately 380km2 due to the acquisition of a

number of additional applications that were owned by Minera Monte Aguila S.A.S.

The Anzá Project is currently wholly owned by Orosur via its subsidiaries, Minera Anzá S.A. and

Minera Monte Aquila S.A.S.

The Anzá Project is located 50km west of Medellin and is easily accessible by all-weather roads

and boasts excellent infrastructure including water, power, communications and large exploration

camp.

Forward Looking Statements:

All statements, other than statements of historical fact, contained in this news release constitute “forward-

looking information” within the meaning of applicable Canadian and United States securities laws, which is

based upon the Company’s current internal expectations, estimates, projections, assumptions, and beliefs.

Such forward-looking statements and forward-looking information include, but are not limited to, statements

concerning future exploration plans at the Company’s mineral properties, including exploration timelines

and anticipated costs; the Company’s expectations with respect to the use of proceeds and the use of the

available funds following the completion of the Offering; and the completion of the Company’s business

objectives, and the timing, costs, and benefits thereof. Forward -looking statements or forward -looking

information relate to future events and future performance and include statement s regarding the

expectations and beliefs of management based on information currently available to the Company. Such

forward-looking statements and forward-looking information often, but not always, can be identified by the

use of words such as “plans”, “potential”, “is expected”, “anticipated”, “estimates”, “intends”, “anticipates”,

or “believes” or the negatives thereof or variations of such words and phrases or statements that certain

actions, events or results “may”, “could”, “would”, “might” or “will” be taken, occur or be achieved.

Forward-looking statements or forward-looking information are subject to a variety of risks and uncertainties

which could cause actual events or results to differ materially from those reflected in the forward -looking

statements or forward-looking information, including, without limitation, risks and uncertainties relating to:

general business and economic conditions; regulatory approval for the Offering; changes in commodity

prices; the supply and demand for, deliveries of, and the level and volatility of the price of gold and other

metals; changes in project parameters as exploration plans continue to be refined; costs of exploration

including labour and equipment costs; risks and uncertainties related to the ability to obtain or maintain

necessary licenses, permits or surface rights; changes in credit market conditions and conditions in financial

markets generally; the ability to procure equipment and operating supplies in sufficient quantities and on a

timely basis; the availability of qualified employees and contractors; the impact of value of the Canadian

dollar and U.S. dollar, foreign exchange rates on costs and financial results; market competition; exploration

results not being consistent with the Company’s expectations; changes in taxation rates or policies;

technical difficulties in connection with mining activities; changes in environmental regulation;

environmental compliance issues; and other risks of the mining industry. Should one or more of these risks

and uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary

materially from those described in forward-looking statements or forward-looking information. Although the

Company has attempted to identify important factors that could cause actual results t o differ materially,

there may be other factors that could cause results not to be as anticipated, estimated, or intended. For

more information on the Company and the risks and challenges of its business, investors should review the

Company’s annual filing s that are available at www.sedarplus.ca. The Company provides no assurance

that forward-looking statements or forward -looking information will prove to be accurate, as actual results

and future events could differ materially from those anticipated in such statements and information.

Accordingly, readers should not place undue reliance on forward -looking statements and forward -looking

information. Any forward-looking statement speaks only as of the date on which it is made and, except as

may be required by applicable securities laws, the Company disclaims any intent or obligation to update

any forward -looking information, whether as a result of new information, changing circumstances, or

otherwise.