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Iamgold Signs Ujv Agreement with Staatsolie

Corporate Updates

NEWS RELEASE

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TSX : IMG NYSE : IAG

IAMGOLD SIGNS UJV AGREEMENT WITH STAATSOLIE

Toronto, Ontario, April 24, 2020 - IAMGOLD Corporation (“IAMGOLD” or the “Company”) is pleased to

announce that its subsidiary Rosebel Gold Mines (“RGM”) has signed an Unincorporated Joint Venture

(“UJV”) Agreement (“Agreement”) with Staatsolie Maatschappij Suriname NV (“Staatsolie”), relating to the

concession areas within the UJV Area of Interest (which includes Saramacca). The UJV excludes the

existing Gross Rosebel mining concession, which is 95% owned by RGM and 5% owned by the Republic

of Suriname.

Staatsolie is Suriname’s state-owned oil company, and also holds a 25% interest in Newmont Suriname as

a limited partner.

The Republic of Suriname has chosen to designate Staatsolie as the entity to hold its undivided 30%

Participating Interest in the UJV, along with all the associated rights and obligations, which Staatsolie

accepted. The UJV was previously agreed to in the Second Amendment to the Mineral Agreement,

announced in June 2013, with Staatsolie now the new UJV partner replacing the entity NV1 that was

originally designated by the Republic of Suriname to hold their 30% interest.

Under the terms of the Agreement between RGM and Staatsolie, the UJV will be administered as follows:

 The date of transfer of the UJV interest is effective the date of signing of the Agreement, April 22,

2020.

 Pursuant to the Agreement, Staatsolie is required to make an initial contribution equal to 30% of

all operating and capital expenses related to the Saramacca Project, including acquisition,

exploration, and development costs within the UJV Area. Accordingly, Staatsolie has paid RGM an

initial amount of US$34.0 million toward an aggregate owing of US$54.9 million.

 The remaining amount, in addition to ongoing operating and capital expenses, including

management fee and interest, will be paid out of Staatsolie’s gold entitlement under the UJV

Agreement.

 An UJV Board will be established to oversee the UJV and its operations, and will be comprised of

four representatives from RGM and two from Staatsolie.

 RGM will remain the UJV Operator, with overall management responsibility for UJV Operations.

 70% of production from the UJV operations, which includes the Saramacca mine, will be

attributable to RGM, with 30% attributable to Staatsolie.

 All royalties and taxes payable in accordance with the Mineral Agreement will be made by each

UJV Party in proportion to its Participating Interest.

IAMGOLD’s production profile for Rosebel beginning in 2020 already incorporates the 70:30 split for

Saramacca.

“We are pleased to welcome Staatsolie as our UJV partner for expansion of the gold production at the

Rosebel operations,” commented Gordon Stothart, President & CEO of IAMGOLD. “They bring both

business savvy and resource industry experience to our partnership. The signing of the UJV Agreement is

the product of many years of effort. I would like to thank all parties involved, including the Surinamese

Government, Staatsolie, and the IAMGOLD team, for their efforts in achieving this successful outcome.”

Rudolf Elias, CEO of Staatsolie, said, “With this participation, Staatsolie increases its share in large -scale

gold mining and further implements its diversification strategy.”

About IAMGOLD

IAMGOLD (www.iamgold.com) is a mid-tier mining company with three operating gold mines on three

continents. A solid base of strategic assets in North and South America and West Africa is complemented

by development and exploration projects and continued assessment of accretive acquisition opportunities.

IAMGOLD is in a strong financial position with extensive management and operational expertise.

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For further information please contact:

Indi Gopinathan, VP , Investor Relations & Corporate Communications, IAMGOLD Corporation

Tel: (416) 360-4743 Mobile: (416) 388-6883

Toll-free: 1-888-464-9999 [email protected]

Please note:

This entire news release may be accessed via fax, e-mail, IAMGOLD's website at www.iamgold.com and through Newsfile's website

at www.newsfilecorp.com. 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 de presse, veuillez consulter le

http://www.iamgold.com/French/accueil/default.aspx.