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OMI.V ·

London, April 23 rd, 2024.

Corporate Updates

CORPORATE

Orosur Mining Inc.

Results for Third Quarter ended February 29, 2024

London, April 23 rd, 2024. Orosur Mining Inc. ("Orosur" or the "Company") (TSX -V: OMI) (AIM: OMI)

the minerals developer and explorer with operations in Colombia, Argentina, Nigeria and

Brazil announces its unaudited results for the quarter ended February 29, 2024. All dollar figures are

stated in US$ unless otherwise noted. The unaudited condensed interim financial statements of the

Company for the quarter ended February 29, 2024 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/5776L_1-2024-4-22.pdf

A link to the PDF version of the MD&A is available here : http://www.rns-

pdf.londonstockexchange.com/rns/5776L_2-2024-4-22.pdf

Highlights

Operational

• In Colombia, post period end, on March 25, 2024, the Company announced that it had it

entered into a non -binding letter of intent with MMA, which was signed on March 22, 2024,

that provides for a transaction pursuant to which Orosur would repurchase, directly or

indirectly, MMA's interest in the Anza project ("Project"), resulting in Orosur having a 100%

ownership of the Project ("Transaction"). The proposed consideration set out in the letter of

intent is a net smelter return royalty of 1.5% and cash payments of up to US$15 million

payable upon meeting certain agreed production thresholds. Subject to several conditions,

including but not limited to, the negotiation of definitive documentation and the completion of

due diligence, the Company is aiming to complete the Transaction by the end of May 2024,

subject to regulatory matters.

• Concurrently with negotiation of the Transaction in Colombia, the Company has begun the

process of preparing to reassume ownership and operatorship of the Project. This involves,

among other things, the recruitment of staff, liaising with the local community, discussions

with relevant contractors and suppliers and the obtaining of various permits required for field

operations. Should the Transaction be completed, the Company hopes to be able to

recommence drilling operations as quickly as possible after reassuming operatorship.

• In the Company's other earlier stage projects in Nigeria, Argentina and Brazil, reconnaissance

exploration has continued at a slower pace. Results and analysis will be announced once

current phases are complete.

CORPORATE

• 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 former 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 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 sale (at the lower of book value or fair

value) and profit and loss from discontinued operations. This accounting treatment has been

applied to the activities in Uruguay and Chile.

• At the Company's AGM, held on December 19, 2023, all resolutions put to shareholders were

duly passed including approval of the Company's new equity incentive plan pursuant to which

the Company may grant stock options, restricted share units, and deferred share units to the

officers, directors, employees and consultants of the Company and its subsidiaries. The new

equity incentive plan replaces the Company's prior stock option plan and should reduce

dilution to shareholders and be more fiscally efficient for some of the participants.

• On February 15, 2024, the Company announced that it had raised the sum of £500,000

(before expenses) through a placing of 16,949,152 new common shares of no par value in the

Company ("Common Share") at a price of 2.95 pence per share, together with a grant of one

unlisted warrant to purchase one additional Common Share exercisable at US$0.0558

(approximately 4.425 pence) for every Common Share subscribed for. As part of abroker

fee,1,694,915 unlisted warrants were granted to the Company's broker, exercisable at

US$0.372 (approximately 2.95 pence) for every Common Share subscribed for. The net

proceeds of the Placing will be used to progress the Company's exploration projects whilst

negotiations are concluded with the Company's partners in Colombia.

• On February 29, 2024, the Company had a cash balance of $1,982,000 (May 31, 2023

$3,748,000). As at the date of this MD&A the Company had a cash balance of $1,650,000.

Outlook and Strategy

Given the progress on negotiations in Colombia and the encouraging results in Argentina, the

Company will focus most of its investment in these areas. The Company will also advance its project

in Nigeria, which has returned strong results, albeit at a slower pace whilst lithium prices continue to

recover. As the Company seeks to prioritise the use of its capital, it will, however, no longer pursue

activity on its Brazilian project and accordingly, Orosur will terminate its JV agreement with Meridian

Mining UK Societas on the Ariquemes tin project.

In Colombia, the short -term focus is on Orosur reassuming 100% ownership and the operatorship of

the Project through the acquisition of MMA. Although there can be no certainty that the Transaction

will complete, the Company is targeting completion of the Transaction by the end of May 2024,

subject to regulatory matters. Thereafter, the Company is planning to recommence drilling at Pepas

and commence further exploration in other areas of the Project.

CORPORATE

Condensed Interim Consolidated Statements of Financial Position

(Expressed in thousands of United States dollars)

Unaudited

As at

February 29,

2024

$

As at

May 31,

2023

$

ASSETS

Current assets

Cash 1,982 3,748

Restricted cash 12 12

Accounts receivable and other assets 452 219

Assets held for sale in Uruguay 1,016 989

Total current assets 3,462 4,968

Non-current assets

Property, plant and equipment 207 123

Exploration and evaluation assets 4,773 3,334

Total assets 8,442 8,425

LIABILITIES AND DEFICIT

Current liabilities

Accounts payable and accrued liabilities 173 336

Liability of Chile discontinued operation 2,335 2,204

Liabilities held for sale in Uruguay 12,616 12,546

Total current liabilities 15,124 15,086

Deficit

Share capital 69,529 69,341

Share-based payments reserve 10,538 10,539

Warrants 302 -

Currency translation reserve (1,904) (2,725)

Deficit (85,147) (83,816)

Total deficit (6,682) (6,661)

Total liabilities and deficit 8,442 8,425

Condensed Interim Consolidated Statements of Loss and Comprehensive Loss

(Expressed in thousands of United States dollars)

CORPORATE

(Except common shares and per share amounts)

Unaudited

Nine Months

Ended

February 29,

2024

$

Nine Months

Ended

February 28, 2023

$

Corporate and administrative expenses (1,285) (1,316)

Exploration expenses (72) (543)

Other income 24 15

Net finance cost (13) (7)

Gain on fair value of warrants - 168

Foreign exchange (loss) gain net 157 (106)

Net loss for the period for continuing operations (1,189) (1,789)

(Loss) income from discontinued operations (136) 1,563

Net loss for the period (1,325) (226)

Item which may be subsequently reclassified to profit or loss:

Cumulative translation adjustment 821 (934)

Total comprehensive loss for the period (504) (1,160)

Basic and diluted net (loss) income per share for

- continuing operations (0.00) (0.00)

- discontinued operations (0.00) 0.01

Weighted average number of common shares

outstanding 189,058 188,544

Condensed Interim Consolidated Statements of Cash Flows

(Expressed in thousands of United States dollars)

Unaudited Nine Months

Ended

February 29,

2024

$

Nine Months

Ended

February 28,

2023

$

Operating activities

Net loss for the period for continued and discontinued operations (1,325) (226)

Adjustments for

Depreciation / Write downs 8 (3,103)

Gain on fair value of warrants - (168)

Accretion of asset retirement obligation - (817)

Gain on sale of property, plant and equipment - (1,396)

Foreign exchange and other 479 68

Changes in non-cash working capital items:

Accounts receivable and other assets (266) (106)

Inventories - 3,415

Accounts payable and accrued liabilities (35) 93

Net cash used in operating activities (1,139) (2,240)

CORPORATE

Investing activities

Decrease in restricted cash - 343

Proceeds received for sale of property, plant and equipment - 945

Purchase of property, plant and equipment (86) (1)

Proceeds received from exploration and option agreement - 2,085

Exploration and evaluation expenditures (1,025) (191)

Net cash (used in) provided by investing activities (1,111) 3,181

Financing activities

Proceeds from issue of common shares, net of shares issuance

cost 486 -

Proceeds from exercise of options 3 2

Net cash provided by financing activities 489 2

Net change in cash (1,761) 943

Net change in cash classified within assets held for sale (5) (1,013)

Cash, beginning of period 3,748 4,221

Cash end of period 1,982 4,151

Operating activities

- continuing operations (1,144) (2,308)

- discontinued operations 5 68

Investing activities

- continuing operations (1,111) 2,236

- discontinued operations - 945

Financing activities

- continued operations 489 2

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

Jeff Keating / Caroline Rowe / Kasia Brzozowska

Tel: +44 (0) 20 3 470 0470

Turner Pope Investments (TPI) Ltd - Joint Broker

Andy Thacker/James Pope

Tel: +44 (0)20 3657 0050

Flagstaff Communications

Tim Thompson

CORPORATE

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 (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,

Argentina, Nigeria and Brazil,

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 exploration plans in Colombia, Argentina, Nigeria and

Brazil and the funding in Colombia from Minera Monte Águila of those plans, Minera Monte Águila´s decision to

continue with the Exploration and Option agreement, the ability for Loryser to continue and finalize with the

remediation in Uruguay, the ability to implement the Creditors' Agreement successfully as well as continuation of

the business of the Company as a going concern and other events or conditions that may occur in the future. The

Company's continuance as a going concern is dependent upon its ability to obtain adequate financing and to

reach a satisfactory implementation 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 the appropriateness of the use of accounting principles applicable to a going

concern. 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, those as described in Section "Risks

Factors" of the MD&A and the Annual Information Form. 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.