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The unaudited condensed interim financial statements of the Company for the quarter ended

Financials

Orosur Mining Inc.

Results for Third Quarter ended February 28th, 2025

London, April 28th, 2025. Orosur Mining Inc. ("Orosur" or "the Company") (TSX-V/AIM: OMI) the minerals

developer and explorer with operations in Colombia, Argentina and Nigeria, announces its unaudited

results for the quarter ended February 28th, 2025. All dollar figures are stated in US$ unless otherwise

noted.

The unaudited condensed interim financial statements of the Company for the quarter ended February

28th, 2025 and the related management's discussion and analysis ("MD&A") have been filed and are

available for review on the SEDAR+ website at www.sedarplus.ca. The financial statements and the MD&A

are also available on the Company's website at www.orosur.ca.

A link to the PDF version of the financial statements is available here:

http://www.rns-pdf.londonstockexchange.com/rns/3087G_2-2025-4-25.pdf

A link to the PDF version of the MD&A is available here:

http://www.rns-pdf.londonstockexchange.com/rns/3087G_1-2025-4-25.pdf

HIGHLIGHTS

Operational and financial highlights for the quarter ended February 28th, 2025 are set out below:

Operational

• In Colombia, on November 27, 2024, the Company completed the acquisition of Minera Monte Aguila

S.A.S. ("Monte Aguila") as a result of which the Company now has 100% ownership of the Company's

flagship Anzá Gold Project. The Company also re -took operatorship of the A nza Gold Project,

commencing a drilling program at the Pepas prospect in late November 2024 which is still continuing

and has produced some exceptional results, the details of which can be found in the Company's news

releases on its website at www.orosur.ca.

In addition, on February 4, 2025, the Company announced that, following some surface sampling to

the area immediately north of Pepas ("Pepas North"), a number of areas of mineralised material have

been identified, with one large area along a small walking track exposing saprolite and semi-fresh rock.

Over 100m of mineralisation was identified at surface, with samples taken at 1m intervals over the

entire length of the exposure. Assay results averaged 1.15g/t Au over 105m, with individual samples at

times exceeding 5g/t Au. This channel sample is at the southern extreme of the new Pepas North

anomalous area, but over 200m north of the limit of current drilling. The Company is expected to

commence drilling Pepas North during Q4 2025.

• In Argentina, on February 17, 2025, the Company announced the successful completion of the first

phase of the two phase exploration joint venture over the El Pantano gold project in Santa

Cruz province, Argentina ("Project" or "El Pantano"). This milestone marks a significant step forward in

the Company 's strategic development of the Project. Having invested US$1m over three years, the

Company has now earned a direct 51% interest in the Argentine company, Deseado Dorado S.A.S

("Deseado"), that owns the exploration licences that make up the Project. The Company can now move

to the second phase of the JV, that could see it move to 100% ownership of Deseado upon investment

of an additional US$2m over two years. Upon such an outcome, the original vendors would then retain

a residual 2% NSR royalty, 1% of which the Company could repurchase at its election for US$1m.

Post period end, a geo-physical campaign commenced with the objective of refining targets after which

the Company will consider drilling, likely to take place later in 2025 subject to funding.

• In Nigeria, the Company will look to make some advances on its lithium project, but at a slower pace

whilst lithium prices continue to recover.

• In Uruguay, the Company's wholly owned subsidiary, Loryser, continues to focus its activities on the

final stages of the Creditors Agreement. In line with the Creditors Agreement, Loryser has sold all of its

assets. It has paid for the settlements with all of its fo rmer employees; it has finalised the reclamation

and remediation works on the tailings dam and has successfully concluded a one -year post-closure

control phase. Loryser is well advanced in distributing the proceeds to Loryser's trade creditors in

accordance with the Creditors' Agreement, via a Court approved settlement agent.

Financial and Corporate

• The unaudited condensed interim consolidated financial statements have been prepared on a going

concern basis under the historical cost method except for certain financial assets and liabilities which

are accounted for as Assets and Liabilities held for sa le (at the lower of book value or fair value) and

Profit and Loss from discontinuing operations. This accounting treatment has been applied to the

activities in Uruguay and Chile.

• At the Company's AGM, held on December 12, 2024 all resolutions put to shareholders were duly

passed.

• On December 19, 2024, the Company announced that it had raised the sum of £1.25 million (before

expenses) through a placing of 18,939,394 new common shares of no par value ("Placing Share") at a

price of 6.6 pence per Placing Share.

• On February 28, 2025, the Company had a cash balance of US$ 2,355,000 (May 31, 2024 US$

1,328,000). As at the date of this MD&A and including the funds raised in the private placement

(detailed below), the Company had a cash balance of US$ 5,570,000.

• Post period end, on March 27, 2025, the Company announced the closing of an oversubscribed private

placement (the "Private Placement") which raised aggregate gross proceeds of C$6,000,000, including

the full exercise of the broker's option for gross proceeds of C$1,000.000. Under the Private Placement,

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 consisted 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

entitles 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.

Condensed Interim Consolidated Statements of Financial Position

(Expressed in thousands of United States dollars)

Unaudited

As at

February 28,

2025

$

As at

May 31,

2024

$

ASSETS

Current assets

Cash 2,355 1,328

Restricted cash 12 12

Accounts receivable and other assets 335 279

Assets held for sale in Uruguay 90 226

Total current assets 2,792 1,845

Non-current assets

Property and equipment 322 202

Exploration and evaluation assets 6,394 3,343

Total assets 9,508 5,390

LIABILITIES AND EQUITY

Current liabilities

Accounts payable and accrued liabilities 528 445

Liability of Chile discontinued operation - 2,376

Liabilities held for sale in Uruguay 10,609 11,208

Total current liabilities 11,137 14,029

Non-current liabilities

Contingency royalties 2,556 -

Total liabilities 13,693 14,029

Equity

Share capital 72,306 69,529

Share-based payments reserve 10,849 10,538

Warrants 919 302

Currency translation reserve (2,151) (1,808)

Accumulated deficit (86,099) (87,194)

Total equity attributable to owners of the parent (4,176) (8,633)

Non-controlling interest (9) (6)

Total equity (4,185) (8,639)

Total liabilities and equity 9,508 5,390

Condensed Interim Consolidated Statements of Income (Loss) and Comprehensive Income (Loss)

(Expressed in thousands of United States dollars)

(Except common shares and per share amounts)

Unaudited

Nine Months

Ended

February 28, 2025

$

Nine Months Ended

February 29, 2024

$

Corporate and administrative expenses (1,384) (1,285)

Exploration expenses (181) (72)

Share-based compensation (311) -

Other income 52 24

Net finance cost (11) (13)

Foreign exchange gain net 89 157

Net loss for the period for continuing operations (1,746) (1,189)

Income (loss) from discontinued operations 2,841 (136)

Net income (loss) for the period 1,095 (1,325)

Item which may be subsequently reclassified to profit or loss:

Cumulative translation adjustment (343) 821

Total comprehensive income (loss) for the period 752 (504)

Basic and diluted net income (loss) per share for

- continuing operations (0.00) (0.00)

- discontinued operations 0.01 (0.00)

Weighted average number of common shares outstanding 229,999,586 189,057,082

Condensed Interim Consolidated Statements of Cash Flows

(Expressed in thousands of United States dollars)

Unaudited Nine

Months

Ended

February

28, 2025

$

Nine Months

Ended

February 29,

2024

$

Operating activities

Net income (loss) for the period for continued and discontinued

operations 1,095 (1,325)

Adjustments for

Depreciation / write downs 16 8

Share-based payments 311 -

Reversed liability and interest accrued (2,376) -

Foreign exchange and other (606) 479

Changes in non-cash working capital items:

Accounts receivable and other assets (8) (266)

Accounts payable and accrued liabilities (203) (35)

Net cash used in operating activities (1,771) (1,139)

Investing activities

Purchase of property and equipment - (86)

Exploration and evaluation expenditures (729) (1,025)

Net cash used in investing activities (729) (1,111)

Financing activities

Proceeds from issue of common shares, net of shares issuance cost 2,376 486

Proceeds from exercise of options 10 3

Proceeds from exercise of warrants 1,008 -

Net cash provided by financing activities 3,394 489

Net change in cash 894 (1,761)

Net change in cash classified within assets held for sale 133 (5)

Cash, beginning of period 1,328 3,748

Cash end of period 2,355 1,982

Operating activities

- continuing operations 738 (1,144)

- discontinued operations (2,509) 5

Investing activities

- continuing operations (729) (1,111)

Financing activities

- continuing operations 3,394 -

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.

Qualified Persons Statement

The information in this news release was compiled, reviewed and verified by Mr. Brad George, BSc Hons

(Geology and Geophysics), MBA, Member of the Australian Institute of Geoscientists (MAIG), CEO of

Orosur Mining Inc. and a qualified person as defined by National Instrument 43-101.

Orosur Mining Inc. staff follow standard operating and quality assurance procedures to ensure that sampling

techniques and sample results meet international reporting standards

Forward Looking Statements

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

looking statements" within the meaning of applicable securities laws, including but not limited to the "safe

harbour" provisions of the United States Private Securities Litigation Reform Act of 1995 and are based on

expectations estimates and projections as of the date of this news release.

Forward-looking statements include, without limitation, the continuing focus on the Pepas prospect, the

exploration plans in Colombia and the funding of those plans, and other events or conditions that may occur

in the future. There can be no assurance that such statements will prove to be accurate. Actual results and

future events could differ materially from those anticipated in such forward -looking statements. Such

statements are subject to significant risks and uncertainties including, but not limited to, those described in

the Section "Risks Factors" of the Company's MD&A for the year ended May 31, 2024. The Company's

continuance as a going concern is dependent upon its ability to obtain adequate financing, to reach

profitable levels of operations and t o reach a satisfactory closure of the Creditor´s Agreement in Uruguay.

These material uncertainties may cast significant doubt upon the Company's ability to realize its assets and

discharge its liabilities in the normal course of business and accordingly t he appropriateness of the use of

accounting principles applicable to a going concern. The Company disclaims any intention or obligation to

update or revise any forward-looking statements whether as a result of new information, future events and

such forward-looking statements, except to the extent required by applicable law.