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Gcm Mining and ARIS GOLD Complete Business Combination to Create ARIS Mining

Mergers & Acquisitions

GCM MINING AND ARIS GOLD COMPLETE BUSINESS

COMBINATION TO CREATE ARIS MINING

Vancouver, Canada, September 26, 2022 – GCM Mining Corp. (GCM Mining) (TSX: GCM; OTCQX: TPRFF)

and Aris Gold Corporation (Aris Gold) (TSX: ARIS; OTCQX: ALLXF) have completed the business combination

previously announced on July 25, 2022. The combined entity has been renamed Aris Mining Corporation

and operates several high -grade underground m ines at its Segovia Operations and the Marmato Mine ,

which together produced 230,000 ounces of gold in 2021. Aris Mining also owns two advanced

development projects, the Marmato Lower Mine expansion and Toroparu Project, and is the operator and

20% shareholder of the Soto Norte joint venture, a large -scale underground project advancing its

environmental permitting.

Neil Woodyer, CEO of Aris Mining, stated: “ Over the past 18 months, our team has completed three

transactions that have resulted in the creation of Aris Mining. We have an attractive mix of production, cash

flow and near -term growth projects, all of which are supported by sizable mineral reserves or resources

and strong financial, technical, and operati ng teams. Within Colombia, we are int egrating the teams at

Segovia and Marmato. The Segovia Operations incorporates an industry -leading artisanal small miner

program that has enhanced relations with the local community and improved the environment by

eliminating the use of mercury and the dis charge of tailings into waterways, and we look forward to

expanding these opportunities for both the Marmato and Soto Norte communities. We will continue to

strengthen stakeholder engagement to deliver mining projects which promote local development and are

aligned to best environmental practices.”

The Board of Directors and leadership team of Aris Mining are as follows:

Board of Directors Executive Team

Ian Telfer Chair Neil Woodyer CEO

Daniela Cambone Director Doug Bowlby EVP and CFO

David Garofalo Director Richard Thomas COO

Serafino Iacono Director Tyron Breytenbach SVP, Capital Markets

Peter Marrone Director Pamela De Mark SVP, Technical Services

Hernan Martinez Director John Mussett SVP, Projects

Attie Roux Director Ashley Baker General Counsel and Corp. Secretary

Neil Woodyer Director Robert Eckford Head of Finance

Meghan Brown VP, Investor Relations

Aris Mining expects to welcome Mónica de Greiff as a member of the Board of Directors in early October

2022.

Aris Mining has approximately $352 million of cash, free cash flow generation from the Segovia Operations,

and approximately $260 million of additional committed funding from precious metals stream agreements

available to fund growth projects 1. Aris Mining has proven and probable mineral reserves of 3.8 million

ounces of gold, measured and indicated mineral r esources of 18.3 million ounces of gold, inclusive of

1 See the Pro Forma Consolidated Financial Information contained in the Joint Management Information Circular dated August 16, 2022

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mineral reserves, and inferred mineral resources of 7.7 million ounces of gold. See Tables 1, 2, and 3 in the

Appendix for details.

A new corporate website has been launched at www.aris-mining.com which contains information on Aris

Mining’s mines and projects, along with information about the Board of Directors, management team and

approach to corporate governance and sustainability.

Transaction and Trading Symbol Updates

At closing, GCM Mining was renamed Aris Mining Corporation and Aris Gold amalgamate d with 1373945

B.C. Ltd. to form Aris Mining Holdings Corp. (Aris Holdings), which is now a wholly owned subsidiary of Aris

Mining.

Aris Mining now has approximately 136.1 million issued and outstanding common shares, inclusive of the

new common shares issued to acquire Aris Gold. Aris Mining common shares (Aris Mining Shares) that are

listed on the Toronto Stock Exchange (TSX) under the symbol GCM are expected to commence trading on

the TSX under the symbol ARIS (CUSIP: 04040Y109) and on the OTCQX under the symbol TPRFF, at the open

of markets on Wednesday, September 28, 2022 . Concurrently, the Aris Mining warrants that are listed on

the TSX under the symbol GCM.WT.B are expected to commence trading on the TSX under the symbol

ARIS.WT.B (CUSIP: 0404Y117).

The Aris Gold common shares (Aris Gold Shares) are expected to be de -listed at the close of markets on

Tuesday, September 27, 2022. Under the terms of the transaction, each Aris Gold shareholder is entitled to

receive 0.5 of an Aris Mining Share for each Aris Gold Share held (the Exchange Ratio) . Each Aris Gold

warrant and option has been adjusted in accordance with the Exchange Ratio to become exercisable for 0.5

of an Aris Mining Shares in lieu of one Aris Gold Share and are exercisable at their original exercise price.

Aris Gold Shares deposited in online trading accounts or similar brokerage accounts are expected to update

automatically to reflect the conversion to Aris Mining Shares in accordance with the Exchange Ratio, which

is expected to generally occur within two weeks of closing. Aris Gold shareholders who hold physical share

certificates or DRS Statements must submit a Letter of Transmittal to the depositary , Odyssey Trust

Company, to receive Aris Mining Shares represented by new Aris Mining share certificates or DRS

Statements. Additional information regarding the process is available on Aris Mining’s website.

Aris Gold warrants that are listed on the TSX under the symbol ARIS.WT are expected to commence trading

on the TSX under the symbol ARIS.WT .A (CUSIP: 04040Y133) at the open of markets on Wednesday,

September 28, 2022.

Aris Mining’s 6.875% Senior Unsecured Notes due in 2026 will continue to be traded on the Singapore

Exchange under the symbol GCM:CN.

Aris Gold’s 7.5% Senior Secured Gold-linked Notes due in 2027 that are listed on the NEO Exchange under

the symbol ARIS.NT.U are now notes of Aris Holdings and will continue to trade on the NEO Exchange. The

notes are expected to commence trading under the new symbol AMNG.NT.U (CUSIP: 04041BAA6), at the

open of markets on Wednesday, September 28, 2022.

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Qualified Person

The technical information in this news release was reviewed and approved by Pamela De Mark, P.Geo,

Senior Vice President, Technical Services of Aris Mining, who is a Qualified Person as defined by NI 43-101.

About Aris Mining

Aris Mining is a Canadian company led by an executive team with a track record of creating value through

building globally relevant mining companies. In Colombia, Aris Mining operates several high -grade

underground mines at its Segovia Operations and the Marmato Mine , which together produced 230,000

ounces of gold in 2021. Aris Mining also operates the Soto Norte joint venture, where environmental

licensing is advancing to develop a new underground gold, silver and copper mine. In Guyana, Aris Mining

is advancing the Toroparu Project, a gold/copper project with expected average gold production of 225,000

per year over the life of mine . Aris Mining plans to pursue acquisition and other growth opportunities to

unlock value creation from scale and diversification.

Aris Mining promotes the formalization of small -scale mining as this process enables all miners to operate

in a legal, safe and responsible manner that protects them and the environment.

Additional information on Aris Mining can be found at www.aris-mining.com and www.sedar.com.

For further information, contact:

Tyron Breytenbach

Senior Vice President, Capital Markets

Meghan Brown

Vice President, Investor Relations

e [email protected]

t + 778.899.0518

Forward -looking Information

This news release contains "forward -looking information" or "forward -looking statements" within the meaning of Canadian

securities legislation. All statements included herein are forward-looking, other than statements of historical fact, including without

limitation statements relating to the benefits to be derived from the business combination, the introduction of the artisanal small

miner program to Marmato and Soto Norte, the prospective opportunities as a combined group, the appointment of Ms. de Greiff,

the timing of listing and symbol changes, and the exchange of Aris Gold Shares for Aris Mining Shares . Generally, the forward -

looking information and forward-looking statements can be identified by the use of forward -looking terminology such as "plans",

"expected", or "will continue", or variations of such words and phrases or state that certain actions, events or results "may ",

"could", "would", "might" or "will" be taken, occur or be achieved.

Forward-looking information and forward-looking statements, while based on management's best estimates and assumptions, are

subject to known and unknown risks, uncertainties and other factors that may cause the actual results, performance or

achievements of Aris Mining to be materially different from those expresse d or implied by such forward -looking information or

forward-looking statements, including the risk factors identified in the Joint Management Information Circular dated August 16,

2022 of GCM Mining and Aris Gold and the documents incorporated by reference therein, which is available on SEDAR at

www.sedar.com.

Although Aris Mining has attempted to identify important factors that could cause actual results to differ materially from those

contained in forward-looking information and forward-looking statements, there may be other factors that cause results not to be

as anticipated, estimated or intended. There can be no assurance that such information or statements will prove to be accurate, as

actual results and future events could differ materially from thos e anticipated in such information or statements. The forward -

looking statements and forward-looking information are made as of the date hereof and Aris Mining disclaims, except as required

by applicable securities laws, any obligation to update any such factors or to publicly announce the result of any revisions to any of

the forward-looking statements or forward -looking information contained herein to reflect future results. Accordingly, readers

should not place undue reliance on forward-looking statements and information.

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Appendi x – Consolidated mineral reserves and resources

Table 1: Aris Mining proven and probable mineral reserves

Category Property

Tonnes

(kt)

Gold grade

(g/t)

Silver grade

(g/t)

Contained gold

(koz)

Contained silver

(koz)

Proven Marmato 802 5.10 22 133 569

Probable Marmato 18,898 3.10 6 1,888 3,780

Probable Soto Norte 4,953 6.22 34 990 5,477

Proven Segovia 204 12.00 79

Probable Segovia 2,087 9.93 666

Proven and Probable, Total 3,756 9,826

Notes: Mineral reserve estimates were prepared under the supervision, or were reviewed by, Pamela De Mark, P.Geo, Senior Vice President,

Technical Services of Aris Mining, who is a Qualified Person as defined by National Instrument NI 43 -101. Totals may not add due to rounding.

Mineral reserve estimates for Soto Norte represent the portion of mineral reserves attributable to Aris Mining based on its 20% ownership interest.

Mineral reserves were estimated using a gold price of USD$1,400 per ounce at Marmato, USD$1,300 per ounce at Soto Norte, and USD$1,650 per

ounce at Segovia. The mineral reserve effective dates are March 17, 2020 for Marmato, January 1, 2021 for Soto Norte, and December 31, 2021 for

Segovia. See “Technical information and qualified person” below for further information.

Table 2: Aris Mining measured and indicated mineral resources

Category Property Tonnes

(Mt)

Gold grade

(g/t)

Silver grade

(g/t)

Contained gold

(koz)

Contained silver

(koz)

Measured Marmato 2.8 6.20 28 562 2,561

Indicated Marmato 54.0 3.00 7 5,245 11,285

Indicated Soto Norte 9.6 5.47 36 1,691 11,065

Measured Segovia 0.5 14.01 208

Indicated Segovia 4.1 10.65 1,412

Measured Toroparu 110.9 1.26 4,479

Indicated Toroparu 74.1 1.66 3,958

Indicated Juby 21.3 1.13 733

Measured and Indicated, Total 18,288 24,911

Notes: Mineral resource estimates were prepared under the supervision, or were reviewed by, Pamela De Mark, P.Geo, Senior Vice President,

Technical Services of Aris Mining, who is a Qualified Person as defined by National Instrument NI 43-101. Mineral resources are not mineral reserves

and do not have demonstrated economic viability. Mineral resource estimates are reported inclusive of mineral reserves. Total s may not add due

to rounding. Mineral resource estimates for Soto Norte represent the portion of mi neral resources attributable to Aris Mining based on its 20%

ownership interest. Mineral resources were estimated using a gold price of USD$1,600 per ounce at Marmato, USD$1,300 per ounce at Soto Norte,

USD$1,800 per ounce at Segovia, USD$1,630 at Toroparu, and USD$1,450 per ounce at Juby. The mineral resource effective dates are June 30, 2021

for Marmato, May 22, 2019 for Soto Norte, December 31, 2021 for Segovia, November 1, 2021 for Toroparu, and July 14, 2020 for Juby. See

“Technical information and qualified person” below for further information.

Table 3: Aris Mining inferred mineral resources

Category Property Tonnes

(Mt)

Gold grade

(g/t)

Silver grade

(g/t)

Contained gold

(koz)

Contained silver

(koz)

Inferred Marmato 30.8 2.60 3 2,567 3,282

Inferred Soto Norte 5.5 4.06 26 714 4,551

Inferred Segovia 5.3 9.91 1,704

Inferred Toroparu 13.8 2.74 1,213

Inferred Juby 47.1 0.98 1,488

Inferred, Total 7,686 7,833

Notes: Refer to the Notes in Table 2.

Technical information

Measured and Indicated mineral resources are reported inclusive of mineral reserves. Mineral resources and reserves are as

defined by the Canadian Institute of Mining, Metallurgy, and Petroleum's 2014 Definition Standards for Mineral Resources &

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Mineral Reserves. Mineral resources are not mineral reserves and have no demonstrated economic viability. There are no known

legal, political, environmental, or other risks that could materially affect the potential development of the mineral resources.

The mineral resource and reserve estimates were prepared following the Canadian Institute of Mining, Metallurgy, and Petroleum's

Estimation of Mineral Resources and Mineral Reserves Best Practice Guidelines. Each of the Qualified Persons responsible for the

preparation of the mineral resources have reviewed and verified the drilling, sampling, assaying, and QAQC protocols and results,

and are of the opinion that the sample recovery, preparation, analyses, and security protocols are reliable for the mineral resource

and reserve estimates.

Technical reports for Marmato, Soto Norte, Segovia, Toroparu, and Juby have been filed with the Canadian securities regulatory

authorities and are available for review on Aris Mining’s website at www.aris-mining.com.

Scientific and technical information concerning Marmato is summarized, derived, or extracted from the Marmato Technical Report

entitled "Revised NI 43-101 Technical Report Pre-Feasibility Study Marmato Project Colombia" dated September 18, 2020 with an

effective date of March 17, 2020. The Marmato Technical Report was prepared by Ben Parsons, MSc, MAusIMM (CP), Eric J. Olin,

MSc Metallurgy, MBA, SME-RM, MAusIMM, Fernando Rodrigues, BS Mining, MBA, MAusIMM, MMSAQP, Jeff Osborn, BEng Mining,

MMSAQP, Joanna Poeck, BEng Mining, SME-RM, MMSAQP, Fredy Henriquez, MS Eng, SME, ISRM, Breese Burnley, P.E., Cristian A

Pereira Farias, SME-RM, David Hoekstra, BS, PE, NCEES, SME-RM, David Bird, PG, SME-RM, Mark Allan Willow, MSc, CEM, SME-RM,

and Tommaso Roberto Raponi, P.Eng, each of whom is independent of Aris Mining within the meaning of NI 43 -101 and is a

"Qualified Person" as such term is defined in NI 43-101.

Scientific and technical information concerning Soto Norte is summarized, derived, or extracted from the Soto Norte Technical

Report entitled "NI 43-101 Technical Report Feasibility Study of the Soto Norte Gold Project, Santander, Colombia", dated March

21, 2022 with an effective date of January 1, 2021. The Soto Norte Technical Report was prepared by Ben Parsons, MSc, MAusIMM

(CP), Chris Bray, BEng, MAusIMM (CP), Dr John Willis PhD, BE (MET), MAusIMM (CP), and Dr Henri Sangam, Ph.D., P.Eng., each of

whom is independent of Aris Mining within the meaning of NI 43 -101 and is a "Qualified Person" as such term is defined in NI 43-

101. The report was also prepared by Robert Anderson, P.Eng., a Qualified Person who is considered non -independent of Aris

Mining.

Scientific and technical information concerning Segovia is summarized, derived, or extracted from the Segovia Technica l Report

entitled "NI 43 -101 Technical Report, Prefeasibility Study, Segovia Project, Antioquia, Colombia" dated May 6, 2022 with an

effective date of December 31, 2021. The Segovia Technical Report was prepared by Ben Parsons, MSc, MAusIMM (CP), Eric Olin ,

MSc, MBA, MAusIMM, SME-RM, Cristian A. Pereira Farias, SME-RM, David Bird, MSc, PG, SME-RM, Fredy Henriques, MS Eng, SME,

ISRM, Jeff Osborn, BEng Mining, MMSAQP, Fernando Rodrigues, BS Mining, MBA, MAusIMM, MMSAQP, Giovanny Ortiz, BS

Geology, FAusIMM, Joshua Sames, PE, BEng Civil, Mark Allan Willow, MSc, CEM, SME-RM, and Jeff Parshley, P.G., each of whom is

independent of Aris Mining within the meaning of NI 43-101 and is a "Qualified Person" as such term is defined in NI 43-101.

Scientific and technical information concerning Toroparu is summarized, derived, or extracted from the Toroparu Technical Report

entitled "Revised NI 43 -101 Technical Report and Preliminary Economic Assessment for the Toroparu Gold Project, Upper Puruni

River Region of Western Guy ana" dated February 4, 2022 with an effective date of December 1, 2021. The Toroparu Technical

Report was prepared by Glen Kuntz, P. Geo., Brian Wissent, P.Eng, Daniel Yang, P.Eng, Ben Peacock, P.Eng, Kurt Boyko, P.Eng,

Fernando Rodrigues, MMSAQP, and David Willms, P.Eng, each of whom is independent of Aris Mining within the meaning of NI 43-

101 and is a "Qualified Person" as such term is defined in NI 43-101. The Preliminary Economic Assessment is preliminary in nature

and is based on numerous assumptions and includes inferred mineral resources. The inferred mineral resources are considered too

speculative geologically to have economic considerations applied to them that would enable them to be categorized as mineral

reserves and there is no certainty that the Preliminary Economic Assessment will be realized.

Scientific and technical information concerning Juby is summarized, derived, or extracted from the Juby Technical Report enti tled

"Technical Report on the Updated Mineral Resource Estimate for the Juby Gold Project, Tyrrell Township, Shining Tree Area,

Ontario" dated October 5, 2020 with an effective date of July 14, 2020. The Juby Technical Report was prepared by Joe Campbel l,

B.Sc., P.Geo., Alan Sexton, M.Sc., P.Geo., Duncan Studd, M.Sc., P.Geo. and Al lan Armitage, Ph.D., P.Geo., each of whom is

independent of Aris Mining within the meaning of NI 43-101 and is a "Qualified Person" as such term is defined in NI 43-101.

Source: Aris Mining Corporation