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IMG.TO ·

Iamgold Announces Amended and Upsized Credit Facility

Financings Debt & Credit Facilities

NEWS RELEASE TSX: IMG NYSE: IAG

IAMGOLD ANNOUNCES AMENDED AND UPSIZED CREDIT FACILITY

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

Toronto, Ontario, December 23, 202 4 – IAMGOLD Corporation (TSX:IMG, NYSE:IAG) (“IAMGOLD” or the

“Company”) is pleased to announce that the Company and its syndicate of lenders have executed an amendment

to its existing secured revolving credit facility (the “Facility”). Under the amendment, the term has been extended

to four years now maturing on December 20, 2028 and the Facility size has been increased from $ 425 million to

$650 million. The expanded Facility will be available for general working capital purposes and provides flexibility

as the Company looks to lower the cost of its debt and improve its capital structure in 2025.

“We would like to thank our lenders for their continued support and confidence in IAMGOLD,” commented Renaud

Adams, President and Chief Executive Officer of IAMGOLD. “The upsize to the credit facility will position the

company well as it provides additional flexibility to potentially lower the cost of our debt, as the make -whole

premium expires on our 2 nd Lien Term Loan in May and assuming no unforeseen changes in the operating or

macroeconomic environment. As we look into next year, IAMGOLD is positioned to generate significant cashflows

following the termination of the gold prepayment arrangements mid -year, coupled with the expectation of strong

mine-site free cashflow at Essakane, Westwood, and Côté Gold – which is expected to achieve nameplate

production later in 2025. Together, this will allow IAMGOLD to begin the important process of de -levering the

balance sheet and put in place a more efficient capital structure.”

The Facility provides for an interest rate margin above market rates ( ex. the Secured Overnight Financing Rate

(“SOFR”), Canadian Overnight Repo Rate Average, banker’s acceptance prime rate and base rate advances )

which vary, together with fees related thereto, according to the total Net Debt to EBITDA ratio of the Company.

The margin on SOFR advances will range from 2.75% to 3.75% based on the total Net Debt to EBITDA ratio of the

Company. The Credit Facility is secured by certain of the Company's real assets, guarantees by certain of the

Company’s subsidiaries and pledges of shares of certain of the Company's subsidiaries.

The terms and conditions of the Facility are set out in the Second Amended and Restated Credit Agreement that

will be filed on SEDAR. National Bank acted as administrative agent, and along with Royal Bank of Canada as Co-

Lead Arrangers and Joint Bookrunners.

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 a pproximately 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 strive for the goal of 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]

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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

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”, “poten tial”, “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 negative 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

Page | 3 of 3

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, operating 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

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 indebt edness; the Company's ability to satisfy covenants under its credit 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 Company’s assets, including the ongoing potential for material imp airment

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 operational targets; equipment malfunctions; information systems security threats and cybersecuri ty; laws

and regulations governing the protection of the environment (including greenhouse gas emi ssion reduction and other decarbonization

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 road s, bridges, power

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

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, an d extreme heat or cold; attraction and retention of key employees 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 m ining; the potential direct or indirect operational impacts resulting from external factors, including infectious

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

business g enerally. Please see the Company’s AIF or Form 40 -F available on 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 intended. 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.