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Second Quarter Results for 2022/23

Drill Results Financials

Orosur Mining Inc.

Second Quarter Results for 2022/23

London, January 30th, 2023. Orosur Mining Inc. ("Orosur" or "the Company") (TSXV/AIM: OMI ),

a South American-focused minerals explorer and developer, is pleased to announce its results for the

second quarter ended November 30, 2022 ("Q2 23" or the "Quarter"). All dollar figures are stated in

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

for the quarter ended November 30, 2022 and the related management's discussion and analysis have

been filed and are available for review on the SEDAR website at www.sedar.com. They are also

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

Highlights of the Second Quarter Results for 2022/23

Colombia

 On 6th September 2022, the Company announced assay results from the Pepas prospect to

the north of Anza, including assay results from PEP001 which returned a substantial, high-

grade intersection of 150.9m @ 3.00g/t Au (from surface). Also announced on that day, that

Monte Aguila had informed the Company that it had met its expenditure of US$4m for the

year.

On 9th September 2022, the Company announced that its JV partner, Monte Águila provided

the Company with a Phase 1 Earn-In Notice, having completed all of the Phase 1 obligations,

including investing US$10 million in the Anza Project. The Company and Monte Aguila will

begin the process of forming a new mining company ("Mining Company") that will hold title

to the Anza Project's concessions and applications. The Company was also notified by Monte

Aguila that in accordance with the Exploration Agreement, it will enter Phase 2 following

negotiation and execution of a joint venture agreement to govern the operations of the

Mining Company. Once the Mining Company is formed, which is expected to take several

months, Orosur will initially have 49% ownership and Monte Aguila, 51% ownership in the

Mining Company, which will be managed by Monte Aguila.

 On 21st October 2022, the Company announced assay results from four additional diamond

drill holes at Pepas and Pupino. Both the Pepas and Pupino prospects are located in the

northern region of the Anzá Prospect, roughly 12km and 8km respectively north northeast

from the central APTA prospect that had seen most drilling at Anzá up until early 2022. At

PEPAS, holes PEP005 and PEP007 were drilled from the same pad as PEP001 but in different

directions. Both holes returned substantial gold intersections, with the best at PEP007 being

80.55m @ 3.05g/t Au from surface (including 41.75m @ 5.24g/t).Two additional holes are

currently underway from new pads in an attempt to better define the geometry of the

mineralised body at Pepas.

 On 2 nd December 2022, after the period end, the Company announced assay results from

another 4 holes at Pepas, holes PEP002,006,008 and 009. Holes PEP002 and 006 did not yield

significant results. Two new drill pads were constructed to drill holes PEP008 and PEP009.

Both holes intersected mineralised structures, largely as expected, but with lower levels of

gold mineralisation than intersected in previous drilling. Near term focus will now shift away

from drilling to focus on field mapping, sampling and trenching activities will continue across

the Project to define further drilling targets, including additional surface works specifically in

the Pepas prospect area.

 On 17 January 2023, the Company announced that negotiations to complete the Mining

Company Constituent Documents with Minera Monte Aguila are progressing and that the

US$2 million Phase 2 Payment will be paid soon. The formation of the new Mining Company,

which will take several months, is underway. Once formed, the Mining Company will be

owned 49% by Orosur and 51% by Minera Monte Aguila who will also be the manager. MMA

may earn an additional 14% ownership in the Mining Company if it has spent US$20 million in

qualifying exploration expenditures on the Project on or prior to the fourth anniversary of the

parties entering into the Mining Company Constituent Documents. If the Phase 2 earn-in is

completed, MMA would own 65% of the Mining Company and the Company would own the

remaining 35%.

Uruguay

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

on the implementation of the Creditors Agreement and the sale of its Uruguayan assets.

Loryser has successfully finalised the reclamation and remediation works on the tailings dam

and has now started a one-year post-closure control phase.

 During the course of the year, Loryser agreed and paid for the settlements with all of its

former employees, with the proceeds received from the sale of certain of its assets.

 Good progress is being made on the sale of Loryser's other assets including plant and

equipment. The proceeds from all of these sales will be used to pay liabilities in Uruguay in

connection with the aforementioned Creditors Agreement.

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 discontinuing operations. This accounting treatment has been

applied to the activities in Uruguay and Chile.

 On 30 th November 2022, the Company had a cash balance of US$2,906k (31 st May 2022,

US$4,221k). As at the date of this announcement the Company had a cash balance of

US$3,549k.

 Post the period end, on 7 th December 2022, all of the outstanding 10,897,058 warrants

expired and so the fully diluted share capital of the Company as at the date of this

announcement is 199,885,299.

For further information, visit www.orosur.ca, follow on twitter @orosurm or 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 / 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 Strategic and Investor Communications

Tim Thompson

Mark Edwards

Fergus Mellon

Tel: +44 (0) 207 129 1474

[email protected]

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.

About Orosur Mining Inc.

Orosur Mining Inc. (TSX-V: OMI; AIM: OMI) is a minerals explorer and developer focused on identifying and

advancing projects in South America. The Company currently operates in Colombia, Brazil and has discontinued

operations in Uruguay.

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 and Brazil and the funding from Newmont/Agnico of those plans,

Newmont/Agnico´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, to reach profitable levels of operations 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 Company's MDA. 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.

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 Ltd and

a qualified person as defined by National Instrument 43-101. Orosur Mining staff follow standard operating and

quality assurance procedures to ensure that sampling techniques and sample results meet international reporting

standards.

Drill core is split in half over widths that vary between 0.3m and 2m, depending upon the geological domain. One

half is kept on site in the Minera Anzá core storage facility, with the other sent for assay. Industry standard QAQC

protocols are put in place with approximately 20% of total submitted samples being blanks, repeats or Certified

Reference Materials (CRMs).

Samples are sent to the Medellin preparation facility of ALS Colombia Ltd, and then to the ISO 9001 certified ALS

Chemex laboratory in Lima, Peru. 30 gram nominal weight samples are then subject to fire assay and AAS analysis

for gold with gravimetric re-finish for overlimit assays of >10g/t. ICP-MS Ultra-Trace level multi-element four-acid

digest analyses is also undertaken for such elements as silver, copper, lead and zinc, etc.Gold intersections are

reported using a lower cut-off of 0.3g/t Au over 3m.

Orosur Mining Inc.

Condensed Interim Consolidated Statements of

Financial Position (Expressed in thousands of

United States dollars)

Unaudited

As at

As at

November 30,

2022

May 31,

2022

ASSETS

Current assets

Cash and cash equivalents

$ 2,906

$ 4,221

Restricted cash 83 353

Accounts receivable and other assets 155 186

Assets held for sale in Uruguay 2,390 1,160

Total current assets 5,534 5,920

Non-current assets

Property, plant and equipment

92

113

Exploration and evaluation assets Colombia 4,602 5,441

Total assets $ 10,228 $ 11,474

LIABILITIES AND (DEFICIT)

Current liabilities

Accounts payable and accrued liabilities

$ 258

$ 389

Liabilities of Chile discontinued operation 2,102 2,058

Warrant liability - 168

Liabilities held for sale in Uruguay 12,998 13,134

Total current liabilities 15,358 15,749

Deficit

Share capital

69,341

69,339

Contributed surplus 10,539 10,540

Currency translation reserve (3,060) (2,125)

Deficit (81,950) (82,029)

Total deficit (5,130) (4,275)

Total liabilities and deficit $ 10,165 $ 11,474

Orosur Mining Inc.

Condensed Interim Consolidated Statements of Loss and

Comprehensive Income and Loss (Expressed in thousands of United

States dollars)

Unaudited

Thr

e

e

M

o

n

Three

Months

Ended

November

30,

Six Months

Ended

November

30,

Six Months

Ended

November

30,

t

h

s

E

n

d

e

d

Nov

emb

er

30,

2022 20

21

2022 2021

Operating expenses

Corporate and administrative

expenses $ (436)

$ (565

)

$ (84

3)

$ (88

5)

Exploration

expenses (185)

(10

)

(24

7)

(10)

Share-based

compensation -

(147

)

- (31

5)

Other

income 2

1 8 2

Net finance

cost (3)

(2) (5) (3)

Gain on fair value of

warrants 92

501 16

8

873

Foreign exchange (loss) gain

net (13)

(33

)

(52) (10

2)

Net (loss) for the period for continued operations

$ (543) Other comprehensive (loss) income:

Cumulative translation

adjustment $ (430)

$ (255

)

$ 7

$ (97

1)

$ (93

5)

$ (44

0)

$ (19

4)

Total comprehensive (loss) for the

period from continued operations

(97

3)

(248

)

(1,90

6)

(63

4)

Income (loss) from discontinued operations

97

9

1,601

1,05

0

58

Total comprehensive income (loss) for

the period

6 1,353 (85

6)

(57

6)

Basic and diluted net (loss) income per

share for continued operations

$ (0.0

0)

$ (0.00

)

$ (0.0

1)

$ (0.0

0)

Basic and diluted net (loss) income per

share for discontinued operations

$

0.01

$

0.01

$

0.01

$

0.00

Weighted average number of common

shares outstanding

188,552

188,420

188,536

188,420

Orosur Mining Inc.

Consolidated Statements of Cash

Flows (Expressed in thousands of

United States dollars)

Three Months

Ended

Three Months

Ended

November 30,

2022

November 31,

2021

Operating activities

Net loss for the year for continued and discontinued

operations

$ 79 $ (382)

Adjustments for:

Share-based payments - 315

Labour provision adjustments - (1,499)

Obsolescence provision (3,107) (300)

Fair value of warrants (168) (873)

Gain on sale of property, plant and equipment (1,396) (111)

Foreign exchange and other (163) (201)

Changes in non-cash working capital items:

Accounts receivable and other assets (101) (86)

Inventories 3,419 716

Accounts payable and accrued liabilities (37) 981

Net cash used in operating activities (1,474) (1,234)

Investing activities

Increase (decrease) in the restricted cash 270 (719)

Proceeds received for sale of property, plant and

equipment

545 111

Environmental rehabilitation provision - (477)

Proceeds received from exploration and option

agreement

85 1,077

Exploration and evaluation expenditures (138) (1,619)

Net cash provided by investing activities 761 (2,048)

Financing activities

Proceeds from the sale of treasury shares - 1,140

2 -

Net cash provided by financing activities 2 1,140

Net Change in cash and cash equivalents (711) (2,176)

Net change in cash classified within assets held for

sale

(604) 547

Cash and cash equivalents, beginning of year 4,221 6,958

Cash and cash equivalents, end of year $ 2,906 $ 5,329

Operating activities

- continued operations (1,533) (1,087)

- discontinued operations 59 (181)

Investing activities

- continued operations 216 (1,682)

- discontinued operations 545 (366)

Financing activities

- continued operations 2 1,140