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Iamgold Announces Return to 70% Ownership IN Côté GOLD with Repurchase of 9.7% Interest

Corporate Updates

NEWS RELEASE TSX: IMG NYSE: IAG

IAMGOLD ANNOUNCES RETURN TO 70% OWNERSHIP IN CÔTÉ GOLD

WITH REPURCHASE OF 9.7% INTEREST

All monetary amounts are expressed in U.S. dollars, unless otherwise indicated.

Toronto, Ontario, December 2, 202 4 – IAMGOLD Corporation (TSX:IMG, NYSE:IAG) (“IAMGOLD” or the

“Company”) is pleased to announce that effective November 30, 2024, it has exercised the right to repurchase the

9.7% interest of the Côté Gold Mine (“Côté Gold”) that was transferred to Sumitomo Metal Mining Co., Ltd.

(“Sumitomo”) through the amended Côté Gold Joint Venture Agreement announced on December 19, 2022. This

transaction returns IAMGOLD to its full 70% interest in Côté Gold.

“I would like to sincerely thank Sumitomo on behalf of IAMGOLD and the Côté Gold team for their partnership and

support,” commented Renaud Adams, President and Chief Executive Officer of IAMGOLD . “This transaction was

very important for IAMGOLD, demonstrating our strong working relationship and our mutual belief in the potential

of Côté. We are honoured to stand beside Sumitomo as we work together to advance and grow what we believe

will be among Canada’s largest gold mines for decades to come. In the near term, Côté remains on track for exiting

this year at 90% of nameplate throughput, positioning the project well to achieve full run rate next year.”

The final purchase price for this repurchase was approximately $377 million and include d $23.7 million for the

repurchase option fee accrued during 2023.

About IAMGOLD

IAMGOLD is an intermediate gold producer and developer based in Canada with operating mines in North America

and West Africa. The Company has commenced production at the large -scale, long life Côté Gold Mine in

partnership with Sumitomo Metal Mining Co. Ltd., which is expected to be among the largest gold mines in Canada.

In addition, the Company has an established portfolio of early stage and advanced exploration projects within high

potential mining districts. IAMGOLD employs approximately 3,600 people and is committed to maintaining its

culture of accountable mining through high standards of Environmental, Social and Governance practices,

including its commitment to Zero Harm®, in every aspect of its business. IAMGOLD is listed on the New York Stock

Exchange (NYSE:IAG) and the Toronto Stock Exchange (TSX:IMG).

IAMGOLD Contact Information

Graeme Jennings, Vice President, Investor Relations

Tel: 416 360 4743 | Mobile: 416 388 6883

Toll-free: 1 888 464 9999

[email protected]

CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION

All information included or incorporated by reference in this news release, including any information as to the Company’s vision, strategy,

future financial or operating performance and other statements that express management’s expectations or estimates o f future

performance or impact, including statements in respect of the prospects and/or development of the Company’s projects, other t han

statements of historical fact, constitutes forward -looking information or forward -looking statements within the meanin g of applicable

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securities laws (collectively referred to herein as “forward -looking statements”) and such forward -looking statements are based on

expectations, estimates and projections as of the date of this news release. Forward-looking statements are generally identifiable by the

use of words such as “may”, “will”, “should”, “would”, “could”, “continue”, “expect”, “budget”, “aim”, “can”, “focus”, “forecast”, “anticipate”,

“estimate”, “believe”, “intend”, “plan”, “schedule”, “guidance”, “outlook”, “potential”, “seek”, “ targets”, “cover”, “strategy”, “during”,

“ongoing”, “subject to”, “future”, “objectives”, “opportunities”, “committed”, “prospective”, “likely”, “progress”, “strive”, “sustain”, “effort”,

“extend”, “remain”, “pursue”, “predict”, or “project” or the negativ e of these words or other variations on these words or comparable

terminology.

For example, forward-looking statements include, but are not limited to, statements with respect to: the estimation of mineral reserves

and mineral resources and the realization of such estimates; operational and financial performance including the Company’s guidance

for and actual results of production, ESG (including environmental) performance, costs and capital and other expenditures suc h as

exploration and including depreciation expense and effective tax rate; the updated life -of-mine plan, ramp-up assumptions and other

project metrics including operating costs in respect to the Côté Gold Mine; expected production of the Côté Gold Mine, expected benefits

from the operational improvements and de -risking strategies implemented or to be implemented by the C ompany; mine development

activities; the Company's capital allocation and liquidity; the announced intention to repurchase the Transferred Interests i n the Côté

Gold Mine, the composition of the Company’s portfolio of assets including its operating mines, development and exploration projects;

the completion of the sale of the Bambouk Assets; permitting timelines and the expected receipt of permits; inflation, includ ing global

inflation and inflationary pressures; global supply chain constraints; environment al verification, biodiversity and social development

projects; plans, targets, proposals and strategies with respect to sustainability, including third party data on which the Company relies,

and their implementation; commitments with respect to sustainabi lity and the impact thereof, including the Company’s “Zero Harm”

vision; commitments with respect to greenhouse gas emissions and decarbonization initiatives (eg. interim target of achieving 30%

absolute reduction in Scope 1 and 2 emissions by 2030); the d evelopment of the Company’s Water Management Standard;

commitments with respect to biodiversity; commitments related to social performance, including commitments in furtherance of

Indigenous relations; the ability to secure alternative sources of consumables of comparable quality and on reasonable terms; workforce

and contractor availability, labour costs and other labour impacts; the impacts of weather; the future price of gold and other commodities;

foreign exchange rates and currency fluctuations; financ ial instruments; hedging strategies; impairment assessments and assets

carrying values estimates; safety and security concerns in the jurisdictions in which the Company operates and the impact the reof on

the Company’s operational and financial performance and financial condition; and government regulation of mining operations (including

the Competition Act and the regulations associated with the fight against climate change).

The Company cautions the reader that forward-looking statements are necessarily based upon a number of estimates and assumptions

that, while considered reasonable by management, are inherently subject to significant business, financial, operational and other risks,

uncertainties, contingencies and other factors, including those described below, which could cause actual results, performanc e or

achievements of the Company to be materially different from results, performance or achievements expressed or implie d by such

forward-looking statements and, as such, undue reliance must not be placed on them. Forward -looking statements are also based on

numerous material factors and assumptions, including as described in this news release, including with respect to: th e Company's

present and future business strategies; operations performance within expected ranges; anticipated future production and cash flows;

local and global economic conditions and the environment in which the Company will operate in the future; the price of precious metals,

other minerals and key commodities; projected mineral grades; international exchanges rates; anticipated capital and operatin g costs;

the availability and timing of required governmental and other approvals for the construction of the Company's projects.

Risks, uncertainties, contingencies and other factors that could cause actual results, performance or achievements of the Company to

be materially different from results, performance or achievements expressed or implied by such forward -looking statements i nclude,

without limitation: the ability of the Company to complete the repurchase of the Transferred Interest in the Côté Gold Mine; the ability of

the Company to complete the sales of the remaining Bambouk Assets; the Company's business strategies and its ability to execute

thereon; the ability of the Company to complete pending transactions; the development and execution of implementing strategie s to

meet the Company’s sustainability vision and targets; security risks, including civil unrest, war or terro rism and disruptions to the

Company’s supply chain and transit routes as a result of such security risks, particularly in Burkina Faso and the Sahel regi on

surrounding the Company’s Essakane mine; the availability of labour and qualified contractors; the a vailability of key inputs for the

Company's operations and disruptions in global supply chains; the volatility of the Company's securities; litigation; contests over title to

properties, particularly title to undeveloped properties; mine closure and rehabi litation risks; management of certain of the Company's

assets by other companies or joint venture partners; the lack of availability of insurance covering all of the risks associated with a mining

company's operations; unexpected geological conditions; com petition and consolidation in the mining sector; the profitability of the

Company being highly dependent on the condition and results of the mining industry as a whole, and the gold mining industry i n

particular; changes in the global prices for gold, and commodities used in the operation of the Company's business (included, but not

limited to diesel, fuel oil and electricity); legal, litigation, legislative, political or economic risks and new developments in the jurisdictions

in which the Company carries on business; changes in taxes, including mining tax regimes; the failure to obtain in a timely manner from

authorities key permits, authorizations or approvals necessary for transactions, exploration, development or operation, opera ting or

technical difficulties in connection with mining or development activities, including geotechnical difficulties and major equipment failure;

the inability of the Company to participate in any gold price increase above the cap in any collar transaction entered into in conjunction

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with certain gold sale prepayment arrangements; the availability of capital; the level of liquidity and capital resources; access to capital

markets and financing; the Company's level of indebtedness; the Company's ability to satisfy covenants under its cr edit facilities;

changes in interest rates; adverse changes in the Company’s credit rating; the Company's choices in capital allocation; effectiveness of

the Company's ongoing cost containment efforts; the Company's ability to execute on de -risking activities and measures to improve

operations; availability of specific assets to meet contractual obligations; risks related to third-party contractors, including reduced control

over aspects of the Company's operations and/or the failure and/or the effectiveness of contractors to perform; risks arising from holding

derivative instruments; changes in U.S. dollar and other currency exchange rates or gold lease rates; capital and currency co ntrols in

foreign jurisdictions; assessment of carrying values for the Comp any’s assets, including the ongoing potential for material impairment

and/or write-downs of such assets; the speculative nature of exploration and development, including the risks of diminishing quantities

or grades of reserves; the fact that reserves and resources, expected metallurgical recoveries, capital and operating costs are estimates

which may require revision; the presence of unfavourable content in ore deposits, including clay and coarse gold; inaccuracies in life of

mine plans; failure to meet op erational targets; equipment malfunctions; information systems security threats and cybersecurity; laws

and regulations governing the protection of the environment (including greenhouse gas emission reduction and other decarboniz ation

requirements and the uncertainty surrounding the interpretation of omnibus Bill C -59 and the related amendments to the Competition

Act (Canada)); employee relations and labour disputes; the maintenance of tailings storage facilities and the potential for a major spill

or failure of the tailings facilities due to uncontrollable events, lack of reliable infrastructure, including access to roads, bridg es, power

sources and water supplies; physical and regulatory risks related to climate change; unpredictable weather patterns and c hallenging

weather conditions at mine sites; disruptions from weather related events resulting in limited or no productivity such as for est fires,

flooding, heavy snowfall, poor air quality, and extreme heat or cold; attraction and retention of key employe es and other qualified

personnel; availability and increasing costs associated with mining inputs and labour, negotiations with respect to new, reas onable

collective labour agreements and/or collective bargaining agreements may not be agreed to; the ability of contractors to timely complete

projects on acceptable terms; the relationship with the communities surrounding the Company's operations and projects; indige nous

rights or claims; illegal mining; the potential direct or indirect operational impacts res ulting from external factors, including infectious

diseases, pandemics, or other public health emergencies; and the inherent risks involved in the exploration, development and mining

business generally. Please see the Company’s AIF or Form 40 -F available o n www.sedarplus.ca or www.sec.gov/edgar for a

comprehensive discussion of the risks faced by the Company and which may cause actual results, performance or achievements of the

Company to be materially different from results, performance or achievements expressed or implied by forward-looking statements.

Although the Company has attempted to identify important factors that could cause actual results to differ materially from those contained

in forward -looking statements, there may be other factors that cause results not to be as anticipated, estimated or i ntended. The

Company disclaims any intention or obligation to update or revise any forward-looking statements whether as a result of new information,

future events or otherwise except as required by applicable law.