IAMGOLD ANNOUNCES CLOSING OF NORTHERN SUPERIOR ACQUISITION All monetary amounts are expressed in U.S. dollars, unless otherwise indicated.
IAMGOLD ANNOUNCES CLOSING OF NORTHERN SUPERIOR ACQUISITION
All monetary amounts are expressed in U.S. dollars, unless otherwise indicated.
Toronto, Ontario, December 19, 2025 – IAMGOLD Corporation (NYSE:IAG) (TSX:IMG) (“IAMGOLD” or the
“Company”) is pleased to announce that the Company has completed the previously announced arrangement (the
“Transaction”) with Northern Superior Resources Inc. (TSXV:SUP) (OTCQB:NSUPF) (GR:D9M1) (“Northern
Superior”), pursuant to which IAMGOLD acquired all of the issued and outstanding common shares of Northern
Superior (the “NSUP Shares”) by way of a plan of arrangement under Division 5 of Part 9 of the Business
Corporations Act (British Columbia).
“With the completion of the acquisition of Northern Superior and its assets, IAMGOLD’s Nelligan Mining Complex
in the Chibougamau-Chapais region of Quebec is now among the largest pre-production gold projects in Canada,”
said Renaud Adams, President and Chief Executive Officer of IAMGOLD. “ We look forward to accelerating our
exploration program in the region with a goal of further expansion and extension of the mineralization at Nelligan,
Philibert and Monster Lake , as we look to continue to grow the mineral ization and advance a project that
complements both the scale and timing of our Côté Gold Mine and its forthcoming expansion.”
As a result of the completion of the Transaction and the acquisition by IAMGOLD of all of the NSUP Shares,
Northern Superior became a wholly-owned subsidiary of IAMGOLD. Former Northern Superior shareholders are
now entitled to receive , in exchange for each NSUP Share held immediately prior to the effective time of the
Transaction, a combination of (i) 0.0991 of an IAMGOLD common share and (ii) C$0.19 in cash. The Transaction
also included a concurrent distribution to Northern Superior's shareholders of all the common shares in the capital
of ONGold Resources Ltd. previously held by Northern Superior. Full details of the Transaction are included in
Northern Superior 's management information circular dated November 10 , 2025, which can be found under
Northern Superior's profile on SEDAR+ at www.sedarplus.ca. The NSUP Shares will be delisted from the TSX
Venture Exchange and an application will be made for Northern Superior to cease to be a reporting issuer in
Ontario, British Columbia, Alberta and Quebec.
About IAMGOLD
IAMGOLD is an intermediate gold producer and developer based in Canada with operating mines in North America
and West Africa, including Côté Gold (Canada), Westwood (Canada) and Essakane (Burkina Faso). The Côté
Gold Mine achieved full nameplate in June 20 25 and has the potential to be among the largest gold mines in
Canada. IAMGOLD operates Côté Gold in partnership with Sumitomo Metal Mining Co. Ltd. In addition, the
Company has an established portfolio of early stage and advanced exploration projects within high potential mining
districts, including the Nelligan Mining Complex located in Quebec, Canada . IAMGOLD employs approximately
3,700 people and is committed to maintaining its culture of accountable mining through high standards of
Environmental, Social and Governance practices. 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
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CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION
All information included 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 of future performance or impac t, including
statements in respect of the prospects and/or development of the Company’s projects, other than statements of historical fact, constitutes
forward-looking information or forward-looking statements within the meaning 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”, “maintain”, “b elieve”, “intend”,
“plan”, “schedule”, “guidance”, “outlook”, “potential”, “seek”, “t argets”, “cover”, “strategy”, “during”, “ongoing”, “subject to”, “future”,
“objectives”, “opportunities”, “committed”, “prospective”, “likely”, “progress”, “strive”, “sustain”, “effort”, “extend”, “re main”, “pursue”,
“predict”, or “project” or the negative of these words or other variations on these words or comparable terminology. For example, forward-
looking statements in this news release include, without limitation, those under the heading “About IAMGOLD”, and include, but are not
limited to, statements with respect to the delisting of the NSUP Shares, Northern Superior ceasing to be a reporting issuer, the anticipated
benefits from integrating Northern Superior and its assets, and the expansion and extension of the mineralization at Nelligan.
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 Company’s business strategies and its ability to execute thereon; the development and execution of implementing
strategies to meet the Company’s sustainability vision and targets; security risks, including civil unrest, war or terrorism and disruptions
to the Company’s supply chain and transit routes as a result of such security risks, particularly in Burkina Faso and the Sah el region
surrounding the Company’s Essakane mine; the availability of labour and qualified contractor s; the availability 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 rehabilitation risks; the lack of availability of insurance covering
all of the risks associated with a mining company’s operations; unexpected geological conditions; competition and consolidati on in the
mining sector; the profitability of the Company be ing highly dependent on the condition and results of the mining industry as a whole,
and the gold mining industry in particular; changes in the global prices for gold, and commodities used in the operation of the Company’s
business (including, but not limi ted 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, including the imposition of tariffs by the United States on
Canadian products; 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 difficu lties in
connection with mining or development activities, including geotechnical difficulties and major equipment failure; 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 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 co ntainment 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 aspec ts 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 cont rols in foreign jurisdictions; assessment of carrying values for the
Company’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 operational targets; equipment
malfunctions; information systems security threats and cybersecurity; laws and regulations governing the protection of the environment
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(including greenhouse gas emission reduction and other decarbonization requirements; 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, 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 forest fires, severe storms, flooding, drought, heavy snowfall, poor air quality, and
extreme heat or cold; attraction and retention of key employees and other qualified personnel; availability and increasing co sts
associated with mining inputs and labour, negotiations with respect to new, reasonable 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; indigenous rights or claims; illegal mining; the potential direct
or indirect operational impacts resulting from external factors, including infectious diseases, pandemics, or other public he alth
emergencies; the completion of the transaction with Mines d’Or Orbec Inc., including the satisfaction of the conditions precedent to the
proposed arrangement, and the inherent risks involved in the exploration, development and mining business generally. Please see the
Company’s Annual Information Form available on SEDAR+ at www.sedarplus.ca or Form 40 -F available on EDGAR at
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.