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Iamgold Announces Closing of Previously Announced Sale of Exploration and Development Assets IN Senegal

Mergers & Acquisitions

NEWS RELEASE

TSX: IMG NYSE: IAG

IAMGOLD ANNOUNCES CLOSING OF PREVIOUSLY ANNOUNCED SALE OF

EXPLORATION AND DEVELOPMENT ASSETS IN SENEGAL

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

Toronto, Ontario, April 26, 2023 – IAMGOLD Corporation (TSX:IMG, NYSE:IAG) (“IAMGOLD” or the “Company”)

is pleased to announce that it has closed the sale of its 90% interest in the Boto Gold Project (“ Boto”) in Senegal

and its 100% interest in the early stage exploration properties of Boto West, Senala West, Daorala and the vested

interest in the Senala Option Earn-in Joint Venture, also in Senegal, (together with Boto, the “Senegal Assets”) for

aggregate gross cash proceeds of approximately $197.6 million (pre-tax). The gross proceeds include deferred

payments of approximately $32 million which are expected to be received during the third quarter 2023. The

remaining 10% interest in Boto will continue to be held by the Government of Senegal.

The sale of the Senegal Assets is part of the previously announced transaction s with Managem (CAS:MNG)

(collectively, the “Transactions”) pursuant to which IAMGOLD will receive approximately $282 million (pre-tax) in

consideration for the shares and subsidiary/intercompany loans of the entities that hold the Company’s interest in

the Senegal Assets, the Diakha-Siribaya Gold Project in Mali and the Karita Gold Project and associated exploration

properties in Guinea.

Closing of the remaining Transactions remain on track for later in the second quarter into the third quarter 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 is building the large-scale, long life Côté Gold project in Canada in partnership with

Sumitomo Metals & Mining of Japan, which is expected to commence production in early 2024. IAMGOLD employs

approximately 3,300 people and is committed to maintaining its culture of accountable mining through high standards

of Environmental, Social and Governance ("ESG") practices, including its commitment to Zero Harm®, in every

aspect of its business. IAMGOLD is listed on the New York Stock E xchange (NYSE:IAG) and the Toronto Stock

Exchange (TSX:IMG) and is one of the companies on the Jantzi Social Index (“JSI”), a socially screened market

capitalization-weighted consisting of companies which pass a set of broadly based environmental, social a nd

governance rating criteria.

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

Statements included in this news release, including any with respect to the Company’s future financial or operating

performance and other statements that express management’s expectations or estimates of futu re performance,

including statements in respect of the sale of its interests in Diakha -Siribaya, Karita, exploration prospects and/or

development of the Company’s projects, other than statements of historical fact, constitute 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 n ews release. Forward -looking statements in this news release include, but

are not limited to, statements with respect to: the ability of the Company to complete the remaining Transactions,

including receipt of applicable regulatory and other third-party approvals, and the timing thereof; the total aggregate

consideration to be received by the Company pursuant to the Transactions ; and the remaining costs to complete

and schedule for Côté Gold. Forward-looking statements are provided for the purpose of providing information about

management’s current expectations and plans relating to the future. Forward -looking statements are generally

identifiable by the use of words such as “may”, “will”, “should”, “continue”, “expect”, "budget", "forecast", “anticipate”,

“estimate”, “believe”, “intend”, “plan”, "schedule", “guidance”, “outlook”, “potential”, “seek”, “targets”, "suspended",

“strategy”, or “project” or the negative of these words or other variations on these words or comparable terminology.

The Company cautio ns 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, uncertai nties, contingencies and other factors, including those

described below, which 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 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: the ability

of the Company to obtain all applicable regulatory and other third-party approvals; the Company's present and future

business strategies; successful completion of financing initiatives, operations performance within expected ranges;

anticipated future production and cash flows; local and global economic conditions and the economic environment

in which the Company will operate in the future; legal and political developments in the jurisdictions in which the

Company operates; the price of gold and other key commodities; projected mineral grades; international exchanges

rates; and anticipated capital and operating costs.

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 include, without limitation: the Company's business strategies and its ability to execute

thereon, including the Transactions; legal, legislative, pol itical or economic risks and new developments in the

jurisdictions in which the Company carries on business; risks associate with the estimation of mineral reserves and

mineral resources; the ongoing impacts of COVID -19 (and its variants) and the Ukraine w ar on the Company and

its workforce, the availability of labour and contractors, key inputs for the Company and global supply chains; the

volatility of the Company's securities; potential engagements with activist shareholders; litigation; contests over title

to properties, particularly title to undeveloped properties; mine closure and rehabilitation 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 ri sks associated with a mining company's operations; business risks, including pandemics,

adverse environmental conditions and hazards; unexpected geological conditions; potential shareholder dilution;

increasing competition 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 in particular; changes in the global prices

for gold and certain other commodities (such as diesel and electricity); c onsolidation in the gold mining industry;

government actions taken in response to COVID-19 and other public health emergencies and pandemics, including

new variants of COVID-19, and any worsening thereof; changes in taxes, including mining tax regimes; the failure

to obtain in a timely manner from authorities key permits, authorizations or approvals necessary for exploration,

development or operation, operating or technical difficulties in connection with mining or development activities,

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including geotechnical difficulties and major equipment failure; seismic activity; the inability 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 indebtedness; the Company's ability to satisfy covenants under its outstanding

debt instruments; 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 ability to execute on the

Company's de -risking activities and measures to improve operations; risks relate d to third -party contractors,

including reduced control over aspects of the Company's operations and/or the failure of contractors to perform;

risks arising from holding derivative instruments; changes in U.S. dollar and other currency exchange rates, interest

rates or gold lease rates; capital and currency controls 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 natur e 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 presen ce of unfavourable content in ore deposits, including clay and

coarse gold; inaccuracies in life of mine plans; failure to meet operational targets; equipment malfunctions; security

risks, including civil unrest, war or terrorism; information systems secur ity threats and cybersecurity; laws and

regulations governing the protection of the environment; employee relations and labour disputes, and the ability of

the Company to successfully negotiation collective labour agreements; the maintenance of tailings storage facilities

and the potential for a major spill or failure of the tailings facilities due to uncontrollable events, such as extreme

weather or seismic events; lack of reliable infrastructure, including access to roads, bridges, power sources and

water supplies; physical and regulatory risks related to climate change; the potential direct or indirect operational

impacts resulting from external factors, including infectious diseases, public health emergencies or pandemics, such

as COVID-19, unpredictable weather patterns and challenging weather conditions; attraction and retention of key

employees and other qualified personnel; availability and increasing costs associated with mining inputs and labour;

the availability of qualified contractors and 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; and the inherent risks involved in the exploration, development and mining industry generally.

Please see the Company’s AIF or Form 40 -F available on www.sedar.com or www.sec.gov/edgar.shtml 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.

All material information on IAMGOLD can be found at www.sedar.com or at www.sec.gov.

Si vous désirez obtenir la version française de ce communiqué, veuillez consulter le www.iamgold.com/French/accueil/default.aspx.