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ALLIED GOLD ANNOUNCES FILING OF PROSPECTUS SUPPLEMENT IN CONNECTION WITH PREVIOUSLY ANNOUNCED OVERNIGHT MARKETED EQUITY OFFERING Prospectus Supplement and Base Shelf Prospectus Accessible on SEDAR+

Financings

NEWS RELEASE

ALLIED GOLD ANNOUNCES FILING OF PROSPECTUS SUPPLEMENT IN CONNECTION WITH PREVIOUSLY

ANNOUNCED OVERNIGHT MARKETED EQUITY OFFERING

Prospectus Supplement and Base Shelf Prospectus Accessible on SEDAR+

NOT FOR DISTRIBUTION TO UNITED STATES NEWSWIRE SERVICES OR FOR THE DISSEMINATION,

DISTRIBUTION, RELEASE OR PUBLICATION, DIRECTLY OR INDIRECTLY, IN OR INTO THE UNITED STATES.

TORONTO, ON – October 20, 2025 – Allied Gold Corporation (TSX:AAUC) (NYSE: AAUC) (“Allied” or the

“Company”) is pleased to announce that it has filed a prospectus supplement ( the “Prospectus

Supplement”) dated October 20, 2025, to its short form base shelf prospectus (the “Base Shelf Prospectus”)

dated October 1, 2024, with the securities regulatory authorities in each of the provinces of Canada to qualify

the public distribution of 6,400,000 common shares of the Company (the “Common Shares”) at an offering

price (the “Offering Price”) of $27.35 per Common Share in connection with the Company’s previously

announced overnight marketed equity offering (the “Offering”). The full particulars of the Offering along

with the possible exercise and issue of shares pursuant to the over -allotment option are set out in the

Prospectus Supplement.

Closing of the Offering is expected to occur on or about October 24, 2025, and is subject to satisfaction of

all closing conditions, including the listing requirements of the Toronto Stock Exchange (the “TSX”) and

the New York Stock Exchange. The TSX has provided its conditional approval of the Offering and the listing

of the Common Shares.

Delivery of the Base Shelf Prospectus, the Prospectus Supplement, and any amendments to such

documents will be satisfied in accordance with the “access equals delivery” provisions of applicable

securities legislation. The Prospectus Supplement , the Base Shelf Prospectus, and any amendment, as

applicable, are accessible under the Company’s profile on SEDAR+ at www.sedarplus.ca. An electronic or

paper copy of the Prospectus Supplement, the Base Shelf Prospectus, and any amendment, as applicable,

may be obtain ed, without charge, from Stifel Nicolaus Canada Inc. by email at

[email protected] by providing the contact with an email address or address, as applicable.

This press release shall not constitute an offer to sell or a solicitation of an offer to buy the Common Shares

in the United States. The Common Shares have not been and will not be registered under the United States

Securities Act of 1933, as amended (the “U.S. Securities Act”), and may not be offered or sold in the United

States absent registration or an applicable exemption from the registration requirements of the U.S.

Securities Act.

About Allied Gold Corporation

Allied is a Canadian -based gold producer with a significant growth profile and mineral endowment,

operating a portfolio of three producing assets and development projects located in Côte d'Ivoire, Mali,

and Ethiopia. Led by a team of mining executives with operational and development experience and a

proven track record of creating value, Allied is progressing through exploration, construction, and

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operational enhancements to become a mid-tier, next-generation gold producer in Africa and ultimately

a leading senior global gold producer.

For further information, please contact:

Allied Gold Corporation

Royal Bank Plaza, North Tower

200 Bay Street, Suite 2200, Toronto, ON M5J 2J3 Canada

Email: [email protected]

CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION AND STATEMENTS

This press release contains "forward-looking information" under applicable Canadian securities legislation. Except for statements of historical f a ct

relating to the Company, information contained herein constitutes forward-looking information, including, but not limited to, any informa tion a s

to the Company's strategy, objectives, plans or future financial or operating performance. Forward-looking statements are characteriz ed by words

such as "plan", "expect", "budget", "target", "project", "intend", "believe", "anticipate", "estimate" and other similar words or negative vers ions

thereof, or statements that certain events or conditions "may", "will", "should", "would" or "could" occur. Forward-looking information include d

in this press release includes, without limitation, statements with respect to information concerning the Offering, the completion of the Offe ring

on the timeline indicated, or at all; the exercise of the over-allotment option; the receipt of all necessary approvals; and the Company’s goa ls to

become a mid-tier, next-generation gold producer in Africa and ultimately a leading senior global gold producer. Forward-looking information is

based on the opinions, assumptions and estimates of management considered reasonable at the date the statements are made, and is inhere ntly

subject to a variety of risks and uncertainties and other known and unknown factors that could cause actual events or results to differ materia lly

from those projected in the forward-looking information. These factors include the state of the financial markets and their impact on the ability

of the Company to raise the gross proceeds currently anticipated by the Company; a necessary re-allocation of proceeds from the Offering ba s e d

on prudent business; fluctuating price of gold; risks relating to the exploration, development and operation of mineral properties, including but

not limited to unusual and unexpected geologic conditions and equipment failures; risks relating to operating in emerging markets, particula rly

Africa, inc luding risk of government expropriation or nationalization of mining operations; risks related to the Company’s expansion a nd

optimization plans referred to herein not being met within the timeframe anticipated, or at all; counterparty, credit, liquidity and interest ra te

risks and access to financing; risks related to the Company’s current alternative financing initiatives not being met within the timeframe s

anticipated, or at all; health, safety and environmental risks and hazards to which the Company's operations are subject; the Company's ability to

maintain or increase present level of gold production; risks related to dependence on products produced from the Company’s key mining asse ts ;

cost and availability of commodities; increases in costs of production, such as fuel, steel, power, labour and other consumables; risks associa te d

with infectious diseases; uncertainty in the estimation of Mineral Reserves and Mineral Resources; the Company's ability to replace and expa nd

Mineral Resources and Mineral Reserves, as applicable, at its mines; factors that may affect the Company's future production estimates, including

but not limited to the quality of ore, production costs, infrastructure and availability of workforce and equipment; risks re lating to partia l

ownerships and/or joint ventures at the Company's operations; reliance on the Company's existing infrastructure and supply ch ains at the

Company's operating mines; risks relating to the acquisition, holding and renewal of title to mining rights and permits, and changes to the mining

legislative and regulatory regimes in the Company's operating jurisdictions; limitations on insurance coverage; risks relating to illegal and artis a na l

mining; the Company's compliance with anti-corruption laws; risks relating to the development, construction and start-up of new mines, including

but not limited to the availability and performance of contractors and suppliers, the receipt of required governmental approvals and permits , a nd

cost overruns; risks relating to acquisitions and divestures; title disputes or claims; risks relating to the termination of mining rights; risks rela ting

to security and human rights; risks associated with processing and metallurgical recoveries; risks related to enforcing legal rights in fore ign

jurisdictions; competition in the precious metals mining industry; risks related to the Company's ability to service its debt obligations; fluctua ting

currency exchange rates (including the US Dollar, Euro, West African CFA Franc and Ethiopian Birr exchange rates); risks related to the Compa ny' s

investments and use of derivatives; taxation risks; scrutiny from non-governmental organizations; labour and employment relations; risks rela te d

to third -party contractor arrangements; repatriation of funds from foreign subsidiaries; community relations; risks related to relying on loca l

advisors and consultants in foreign jurisdictions; the impact of global financial, economic and political conditions, global liquidity, interest ra te s ,

inflation and other factors on the Company's results of operations and market price of common shares; risks associated with financial projections ;

force majeure events; transactions that may result in dilution to common shares; future sales of common shares by existing shareholders; the

Company's dependence on key management personnel and executives; vulnerability of information systems including cyber attacks; as well as

those factors discussed in the section entitled “Economic Trends, Business Risks and Uncertainties” in the Compan y’s interim management’ s

discussion and analysis for the three and six months ended June 30, 2025 and the section entitled “Risk Factors” in the Compa ny’s annua l

information form for the year ended December 31, 2024, both of which are available at www.sedarplus.ca and are included in the Compa ny’ s

filings with the SEC at www.sec.gov.

Although the Company has attempted to identify important factors that could cause actual actions, events or results to differ materially f rom

those described in forward-looking information, there may be other factors that could cause actions, events or results to not be as anticipa te d,

estimated or intended. There can be no assurance that forward-looking information will prove to be accurate, as actual results and future eve nts

could differ materially from those anticipated in such statements. The Company undertakes no obligation to update forward-looking informa tion

if circumstances or management's estimates, assumptions or opinions should change, except as required by applicable law. The reader is cautione d

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not to place undue reliance on forward-looking information. The forward-looking information contained herein is presented for the purpos e of

assisting investors in understanding the Company's plans in connection with the proposed Offering and may not be appropriate for other purpos e s .