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OMI.V ·

OMI) the minerals developer and explorer with operations in Colombia, Argentina, Nigeria and Brazil announces its unaudited results for the quarter ended

Corporate Updates

CORPORATE

Orosur Mining Inc.

Results for First Quarter ended August 31, 2023

London, October 30th, 2023. 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 August 31, 202 3. All dollar figures are stated in

US$ unless ot herwise noted. The unaudited condensed interim financial statements of the Company

for the quarter ended August 31, 2023 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: [RNS to insert link to FS]

A link to the PDF version of the MD&A is available here: [RNS to insert link to MD&A]

HIGHLIGHTS

• In Colombia, negotiations continued with Monte Aguila on the shareholders agreement which will

govern the new mining company to be owned 51% by Monte Agulia and 49% by Orosur. These

discussions have continued post the period end. Whilst exploration activities have been wound

back, some mapping and surface sampling has been carried out; a variety of licence processes,

such as the integration of smaller licences have been advanced; and Monte Aguila has continued

to fund the promotion of relationships with local community groups to strengthen the social licence

to operate the Project.

• In Brazil, on July 5, 2023, the Company announced that given the success of the regional stream

sediment program performed across the Company’s Ariquemes district, it had decided to move to

the next phase which has targeted two prospects at Oriente Novo (in the east of the Company’s

tenements) and at Paraiso in the west and to the north of the Bom Futuro tin mine. Sampling was

performed during July and August and assays are expected imminently.

• In Argentina, on May 4, 2023 the Company announced that mapping and ground magnetic surveys

at El Pantano had identified a major NW-SE structural corridor over 20km long and 5km wide, with

large areas of silicification, alteration and geochemical anoma lism over extensive areas. Mapping

to the north of the main structure has so far identified over 70 quartz veins over an area in excess

of 20km2, with textures indicative of cooler temperatures, fully consistent with the model of a very

large low -sulphidation epithermal system. Mapping of this vein field continued until the

commencement of the winter recess in early June. Soil sampling assay results were received and

continued to add weight to the geological model with extended anomalism in gold and key

pathfinder elements. Sampling and ground magnetic surveys recommenced after the winter recess

in September with the plan of completing coverage of the highest priority parts of the project before

the end of the year.

CORPORATE

• In Uruguay the Company’s wholly owned subsidiary, Loryser, continue d 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 paying agent.

• Post the period end, on October 16,2023, the Company announced that it had signed a joint venture

agreement over four licences in the Nigerian lithium belt. The Company, via a new 100%

owned UK subsidiary, Lithium West Limited ("Lithium West"), may earn up to 70% equity in the

project in two phases: Phase 1 - Lithium West can earn 51% equity in the project by spending a

total of US$3m over a maximum of three years. Phase 2 - Lithium West can earn an additional 19%

equity in the project, up to a total of 70%, by spending an additional US$2m over a maximum of

two years. Other prospective areas are currently being examined and it is possible that additional

licences may be added to the project in the near term.

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 sale (at the lower of book value o r fair

value) and Profit and Loss from discontinued operations. This accounting treatment has been

applied to the activities in Uruguay and Chile.

• On August 31, 2023, the Company had a cash balance of $3,186,000 (May 31, 2023: $3,748,000).

As at the date of this announcement the Company had a cash balance of $2,350,000.

Louis Castro, Executive Chairman of Orosur said:

“This has been a very busy progressive first quarter for the Company, with positive advances across all

our portfolio. We are particularly delighted, post period, to add a high quality Lithium asset in Nigeria

with an in situ team, which will allow us to focus on both our South American activities and on our new

asset. “

CORPORATE

Condensed Interim Consolidated Statements of Financial Position

(Expressed in thousands of United States dollars)

Unaudited

As at

August 31,

2023

$

As at

May 31,

2023

$

ASSETS

Current assets

Cash 3,186 3,748

Restricted cash 12 12

Accounts receivable and other assets 208 219

Assets held for sale in Uruguay 958 898

Total current assets 4,364 4,968

Non-current assets

Property, plant and equipment 137 123

Exploration and evaluation assets 3,787 3,334

Total assets 8,288 8,425

LIABILITIES AND DEFICIT

Current liabilities

Accounts payable and accrued liabilities 269 336

Liability of Chile discontinued operation 2,248 2,204

Liabilities held for sale in Uruguay 12,719 12,546

Total current liabilities 15,236 15,086

Deficit

Share capital 69,341 69,341

Share-based payments reserve 10,539 10,539

Currency translation reserve (2,398) (2,725)

Deficit (84,430) (83,816)

Total deficit (6,948) (6,661)

Total liabilities and deficit 8,288 8,425

CORPORATE

Condensed Interim Consolidated Statements of Loss and Comprehensive Loss

(Expressed in thousands of United States dollars)

(Except common shares and per share amounts)

Unaudited

Three Months

Ended

August 31,

2023

$

Three Months

Ended

August 31,

2022

$

Corporate and administrative expenses (398) (407)

Exploration expenses (27) (62)

Other income 6 6

Net finance cost (4) (2)

Gain on fair value of warrants - 76

Foreign exchange (loss) gain net 59 (39)

Net (loss) for the period for continuing operations (364) (428)

(Loss) income from discontinued operations (250) 71

Net (loss) for the period (614) (357)

Item which may be subsequently reclassified to profit or loss:

Cumulative translation adjustment 327 (505)

Total comprehensive (loss) for the period (287) (862)

Basic and diluted net (loss) income per share for

- continuing operations (0.00) (0.00)

- discontinued operations (0.00) 0.00

Weighted average number of common shares outstanding 188,560 188,432

CORPORATE

Condensed Interim Consolidated Statements of Cash Flows

(Expressed in thousands of United States dollars)

Unaudited Three Months

Ended

August 31,

2023

$

Three Months

Ended

August 31,

2022

$

Operating activities

Net loss for the period for continued and discontinued

operations (614) (357)

Adjustments for

Depreciation / Write downs 2 -

Gain on fair value of warrants - (76)

Gain on sale of property, plant and equipment - (4)

Foreign exchange and other 109 (266)

Changes in non-cash working capital items:

Accounts receivable and other assets 14 (9)

Inventories - 17

Accounts payable and accrued liabilities 70 (81)

Net cash used in operating activities (419) (776)

Investing activities

Decrease in restricted cash - 150

Proceeds received for sale of property, plant and equipment - 4

Purchase of property, plant and equipment (9) -

Proceeds received from exploration and option agreement - 37

Exploration and evaluation expenditures (171) (61)

Net cash (used in) provided by investing activities (180) 130

Net change in cash (599) (646)

Net change in cash classified within assets held for sale 37 59

Cash, beginning of period 3,748 4,221

Cash end of period 3,186 3,634

Operating activities

- continuing operations (382) (713)

- discontinued operations (37) (63)

Investing activities

- continuing operations (180) 126

- discontinued operations - 4

CORPORATE

For further information, visit www.orosur.ca, follow on twitter @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 / 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

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 insid e

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 operat ing 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 Litig ation 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 t o 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 Compan y 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.

CORPORATE